Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

45 files changed, 11822 insertions, 0 deletions

diff --git a/drivers/video/fbdev/via/Makefile b/drivers/video/fbdev/via/Makefile
new file mode 100644
index 0000000000..771a0eee7f
--- /dev/null
+++ b/drivers/video/fbdev/via/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the VIA framebuffer driver (for Linux Kernel 2.6)
+#
+
+obj-$(CONFIG_FB_VIA) += viafb.o
+
+viafb-y	:=viafbdev.o hw.o via_i2c.o dvi.o lcd.o ioctl.o accel.o \
+	via_utility.o vt1636.o global.o tblDPASetting.o viamode.o \
+	via-core.o via-gpio.o via_modesetting.o via_clock.o \
+	via_aux.o via_aux_edid.o via_aux_vt1636.o via_aux_vt1632.o \
+	via_aux_vt1631.o via_aux_vt1625.o via_aux_vt1622.o via_aux_vt1621.o \
+	via_aux_sii164.o via_aux_ch7301.o
diff --git a/drivers/video/fbdev/via/accel.c b/drivers/video/fbdev/via/accel.c
new file mode 100644
index 0000000000..0a1bc7a4d7
--- /dev/null
+++ b/drivers/video/fbdev/via/accel.c
@@ -0,0 +1,533 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#include <linux/via-core.h>
+#include "global.h"
+
+/*
+ * Figure out an appropriate bytes-per-pixel setting.
+ */
+static int viafb_set_bpp(void __iomem *engine, u8 bpp)
+{
+	u32 gemode;
+
+	/* Preserve the reserved bits */
+	/* Lowest 2 bits to zero gives us no rotation */
+	gemode = readl(engine + VIA_REG_GEMODE) & 0xfffffcfc;
+	switch (bpp) {
+	case 8:
+		gemode |= VIA_GEM_8bpp;
+		break;
+	case 16:
+		gemode |= VIA_GEM_16bpp;
+		break;
+	case 32:
+		gemode |= VIA_GEM_32bpp;
+		break;
+	default:
+		printk(KERN_WARNING "viafb_set_bpp: Unsupported bpp %d\n", bpp);
+		return -EINVAL;
+	}
+	writel(gemode, engine + VIA_REG_GEMODE);
+	return 0;
+}
+
+
+static int hw_bitblt_1(void __iomem *engine, u8 op, u32 width, u32 height,
+	u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
+	u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
+	u32 fg_color, u32 bg_color, u8 fill_rop)
+{
+	u32 ge_cmd = 0, tmp, i;
+	int ret;
+
+	if (!op || op > 3) {
+		printk(KERN_WARNING "hw_bitblt_1: Invalid operation: %d\n", op);
+		return -EINVAL;
+	}
+
+	if (op != VIA_BITBLT_FILL && !src_mem && src_addr == dst_addr) {
+		if (src_x < dst_x) {
+			ge_cmd |= 0x00008000;
+			src_x += width - 1;
+			dst_x += width - 1;
+		}
+		if (src_y < dst_y) {
+			ge_cmd |= 0x00004000;
+			src_y += height - 1;
+			dst_y += height - 1;
+		}
+	}
+
+	if (op == VIA_BITBLT_FILL) {
+		switch (fill_rop) {
+		case 0x00: /* blackness */
+		case 0x5A: /* pattern inversion */
+		case 0xF0: /* pattern copy */
+		case 0xFF: /* whiteness */
+			break;
+		default:
+			printk(KERN_WARNING "hw_bitblt_1: Invalid fill rop: "
+				"%u\n", fill_rop);
+			return -EINVAL;
+		}
+	}
+
+	ret = viafb_set_bpp(engine, dst_bpp);
+	if (ret)
+		return ret;
+
+	if (op != VIA_BITBLT_FILL) {
+		if (src_x & (op == VIA_BITBLT_MONO ? 0xFFFF8000 : 0xFFFFF000)
+			|| src_y & 0xFFFFF000) {
+			printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
+				"x/y %d %d\n", src_x, src_y);
+			return -EINVAL;
+		}
+		tmp = src_x | (src_y << 16);
+		writel(tmp, engine + 0x08);
+	}
+
+	if (dst_x & 0xFFFFF000 || dst_y & 0xFFFFF000) {
+		printk(KERN_WARNING "hw_bitblt_1: Unsupported destination x/y "
+			"%d %d\n", dst_x, dst_y);
+		return -EINVAL;
+	}
+	tmp = dst_x | (dst_y << 16);
+	writel(tmp, engine + 0x0C);
+
+	if ((width - 1) & 0xFFFFF000 || (height - 1) & 0xFFFFF000) {
+		printk(KERN_WARNING "hw_bitblt_1: Unsupported width/height "
+			"%d %d\n", width, height);
+		return -EINVAL;
+	}
+	tmp = (width - 1) | ((height - 1) << 16);
+	writel(tmp, engine + 0x10);
+
+	if (op != VIA_BITBLT_COLOR)
+		writel(fg_color, engine + 0x18);
+
+	if (op == VIA_BITBLT_MONO)
+		writel(bg_color, engine + 0x1C);
+
+	if (op != VIA_BITBLT_FILL) {
+		tmp = src_mem ? 0 : src_addr;
+		if (dst_addr & 0xE0000007) {
+			printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
+				"address %X\n", tmp);
+			return -EINVAL;
+		}
+		tmp >>= 3;
+		writel(tmp, engine + 0x30);
+	}
+
+	if (dst_addr & 0xE0000007) {
+		printk(KERN_WARNING "hw_bitblt_1: Unsupported destination "
+			"address %X\n", dst_addr);
+		return -EINVAL;
+	}
+	tmp = dst_addr >> 3;
+	writel(tmp, engine + 0x34);
+
+	if (op == VIA_BITBLT_FILL)
+		tmp = 0;
+	else
+		tmp = src_pitch;
+	if (tmp & 0xFFFFC007 || dst_pitch & 0xFFFFC007) {
+		printk(KERN_WARNING "hw_bitblt_1: Unsupported pitch %X %X\n",
+			tmp, dst_pitch);
+		return -EINVAL;
+	}
+	tmp = VIA_PITCH_ENABLE | (tmp >> 3) | (dst_pitch << (16 - 3));
+	writel(tmp, engine + 0x38);
+
+	if (op == VIA_BITBLT_FILL)
+		ge_cmd |= fill_rop << 24 | 0x00002000 | 0x00000001;
+	else {
+		ge_cmd |= 0xCC000000; /* ROP=SRCCOPY */
+		if (src_mem)
+			ge_cmd |= 0x00000040;
+		if (op == VIA_BITBLT_MONO)
+			ge_cmd |= 0x00000002 | 0x00000100 | 0x00020000;
+		else
+			ge_cmd |= 0x00000001;
+	}
+	writel(ge_cmd, engine);
+
+	if (op == VIA_BITBLT_FILL || !src_mem)
+		return 0;
+
+	tmp = (width * height * (op == VIA_BITBLT_MONO ? 1 : (dst_bpp >> 3)) +
+		3) >> 2;
+
+	for (i = 0; i < tmp; i++)
+		writel(src_mem[i], engine + VIA_MMIO_BLTBASE);
+
+	return 0;
+}
+
+static int hw_bitblt_2(void __iomem *engine, u8 op, u32 width, u32 height,
+	u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
+	u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
+	u32 fg_color, u32 bg_color, u8 fill_rop)
+{
+	u32 ge_cmd = 0, tmp, i;
+	int ret;
+
+	if (!op || op > 3) {
+		printk(KERN_WARNING "hw_bitblt_2: Invalid operation: %d\n", op);
+		return -EINVAL;
+	}
+
+	if (op != VIA_BITBLT_FILL && !src_mem && src_addr == dst_addr) {
+		if (src_x < dst_x) {
+			ge_cmd |= 0x00008000;
+			src_x += width - 1;
+			dst_x += width - 1;
+		}
+		if (src_y < dst_y) {
+			ge_cmd |= 0x00004000;
+			src_y += height - 1;
+			dst_y += height - 1;
+		}
+	}
+
+	if (op == VIA_BITBLT_FILL) {
+		switch (fill_rop) {
+		case 0x00: /* blackness */
+		case 0x5A: /* pattern inversion */
+		case 0xF0: /* pattern copy */
+		case 0xFF: /* whiteness */
+			break;
+		default:
+			printk(KERN_WARNING "hw_bitblt_2: Invalid fill rop: "
+				"%u\n", fill_rop);
+			return -EINVAL;
+		}
+	}
+
+	ret = viafb_set_bpp(engine, dst_bpp);
+	if (ret)
+		return ret;
+
+	if (op == VIA_BITBLT_FILL)
+		tmp = 0;
+	else
+		tmp = src_pitch;
+	if (tmp & 0xFFFFC007 || dst_pitch & 0xFFFFC007) {
+		printk(KERN_WARNING "hw_bitblt_2: Unsupported pitch %X %X\n",
+			tmp, dst_pitch);
+		return -EINVAL;
+	}
+	tmp = (tmp >> 3) | (dst_pitch << (16 - 3));
+	writel(tmp, engine + 0x08);
+
+	if ((width - 1) & 0xFFFFF000 || (height - 1) & 0xFFFFF000) {
+		printk(KERN_WARNING "hw_bitblt_2: Unsupported width/height "
+			"%d %d\n", width, height);
+		return -EINVAL;
+	}
+	tmp = (width - 1) | ((height - 1) << 16);
+	writel(tmp, engine + 0x0C);
+
+	if (dst_x & 0xFFFFF000 || dst_y & 0xFFFFF000) {
+		printk(KERN_WARNING "hw_bitblt_2: Unsupported destination x/y "
+			"%d %d\n", dst_x, dst_y);
+		return -EINVAL;
+	}
+	tmp = dst_x | (dst_y << 16);
+	writel(tmp, engine + 0x10);
+
+	if (dst_addr & 0xE0000007) {
+		printk(KERN_WARNING "hw_bitblt_2: Unsupported destination "
+			"address %X\n", dst_addr);
+		return -EINVAL;
+	}
+	tmp = dst_addr >> 3;
+	writel(tmp, engine + 0x14);
+
+	if (op != VIA_BITBLT_FILL) {
+		if (src_x & (op == VIA_BITBLT_MONO ? 0xFFFF8000 : 0xFFFFF000)
+			|| src_y & 0xFFFFF000) {
+			printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
+				"x/y %d %d\n", src_x, src_y);
+			return -EINVAL;
+		}
+		tmp = src_x | (src_y << 16);
+		writel(tmp, engine + 0x18);
+
+		tmp = src_mem ? 0 : src_addr;
+		if (dst_addr & 0xE0000007) {
+			printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
+				"address %X\n", tmp);
+			return -EINVAL;
+		}
+		tmp >>= 3;
+		writel(tmp, engine + 0x1C);
+	}
+
+	if (op == VIA_BITBLT_FILL) {
+		writel(fg_color, engine + 0x58);
+	} else if (op == VIA_BITBLT_MONO) {
+		writel(fg_color, engine + 0x4C);
+		writel(bg_color, engine + 0x50);
+	}
+
+	if (op == VIA_BITBLT_FILL)
+		ge_cmd |= fill_rop << 24 | 0x00002000 | 0x00000001;
+	else {
+		ge_cmd |= 0xCC000000; /* ROP=SRCCOPY */
+		if (src_mem)
+			ge_cmd |= 0x00000040;
+		if (op == VIA_BITBLT_MONO)
+			ge_cmd |= 0x00000002 | 0x00000100 | 0x00020000;
+		else
+			ge_cmd |= 0x00000001;
+	}
+	writel(ge_cmd, engine);
+
+	if (op == VIA_BITBLT_FILL || !src_mem)
+		return 0;
+
+	tmp = (width * height * (op == VIA_BITBLT_MONO ? 1 : (dst_bpp >> 3)) +
+		3) >> 2;
+
+	for (i = 0; i < tmp; i++)
+		writel(src_mem[i], engine + VIA_MMIO_BLTBASE);
+
+	return 0;
+}
+
+int viafb_setup_engine(struct fb_info *info)
+{
+	struct viafb_par *viapar = info->par;
+	void __iomem *engine;
+	u32 chip_name = viapar->shared->chip_info.gfx_chip_name;
+
+	engine = viapar->shared->vdev->engine_mmio;
+	if (!engine) {
+		printk(KERN_WARNING "viafb_init_accel: ioremap failed, "
+			"hardware acceleration disabled\n");
+		return -ENOMEM;
+	}
+
+	switch (chip_name) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+	case UNICHROME_CX700:
+	case UNICHROME_CN750:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+		viapar->shared->hw_bitblt = hw_bitblt_1;
+		break;
+	case UNICHROME_VX800:
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		viapar->shared->hw_bitblt = hw_bitblt_2;
+		break;
+	default:
+		viapar->shared->hw_bitblt = NULL;
+	}
+
+	viapar->fbmem_free -= CURSOR_SIZE;
+	viapar->shared->cursor_vram_addr = viapar->fbmem_free;
+	viapar->fbmem_used += CURSOR_SIZE;
+
+	viapar->fbmem_free -= VQ_SIZE;
+	viapar->shared->vq_vram_addr = viapar->fbmem_free;
+	viapar->fbmem_used += VQ_SIZE;
+
+#if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
+	/*
+	 * Set aside a chunk of framebuffer memory for the camera
+	 * driver.  Someday this driver probably needs a proper allocator
+	 * for fbmem; for now, we just have to do this before the
+	 * framebuffer initializes itself.
+	 *
+	 * As for the size: the engine can handle three frames,
+	 * 16 bits deep, up to VGA resolution.
+	 */
+	viapar->shared->vdev->camera_fbmem_size = 3*VGA_HEIGHT*VGA_WIDTH*2;
+	viapar->fbmem_free -= viapar->shared->vdev->camera_fbmem_size;
+	viapar->fbmem_used += viapar->shared->vdev->camera_fbmem_size;
+	viapar->shared->vdev->camera_fbmem_offset = viapar->fbmem_free;
+#endif
+
+	viafb_reset_engine(viapar);
+	return 0;
+}
+
+void viafb_reset_engine(struct viafb_par *viapar)
+{
+	void __iomem *engine = viapar->shared->vdev->engine_mmio;
+	int highest_reg, i;
+	u32 vq_start_addr, vq_end_addr, vq_start_low, vq_end_low, vq_high,
+		vq_len, chip_name = viapar->shared->chip_info.gfx_chip_name;
+
+	/* Initialize registers to reset the 2D engine */
+	switch (viapar->shared->chip_info.twod_engine) {
+	case VIA_2D_ENG_M1:
+		highest_reg = 0x5c;
+		break;
+	default:
+		highest_reg = 0x40;
+		break;
+	}
+	for (i = 0; i <= highest_reg; i += 4)
+		writel(0x0, engine + i);
+
+	/* Init AGP and VQ regs */
+	switch (chip_name) {
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M900:
+	case UNICHROME_VX800:
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		writel(0x00100000, engine + VIA_REG_CR_TRANSET);
+		writel(0x680A0000, engine + VIA_REG_CR_TRANSPACE);
+		writel(0x02000000, engine + VIA_REG_CR_TRANSPACE);
+		break;
+
+	default:
+		writel(0x00100000, engine + VIA_REG_TRANSET);
+		writel(0x00000000, engine + VIA_REG_TRANSPACE);
+		writel(0x00333004, engine + VIA_REG_TRANSPACE);
+		writel(0x60000000, engine + VIA_REG_TRANSPACE);
+		writel(0x61000000, engine + VIA_REG_TRANSPACE);
+		writel(0x62000000, engine + VIA_REG_TRANSPACE);
+		writel(0x63000000, engine + VIA_REG_TRANSPACE);
+		writel(0x64000000, engine + VIA_REG_TRANSPACE);
+		writel(0x7D000000, engine + VIA_REG_TRANSPACE);
+
+		writel(0xFE020000, engine + VIA_REG_TRANSET);
+		writel(0x00000000, engine + VIA_REG_TRANSPACE);
+		break;
+	}
+
+	/* Enable VQ */
+	vq_start_addr = viapar->shared->vq_vram_addr;
+	vq_end_addr = viapar->shared->vq_vram_addr + VQ_SIZE - 1;
+
+	vq_start_low = 0x50000000 | (vq_start_addr & 0xFFFFFF);
+	vq_end_low = 0x51000000 | (vq_end_addr & 0xFFFFFF);
+	vq_high = 0x52000000 | ((vq_start_addr & 0xFF000000) >> 24) |
+		((vq_end_addr & 0xFF000000) >> 16);
+	vq_len = 0x53000000 | (VQ_SIZE >> 3);
+
+	switch (chip_name) {
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M900:
+	case UNICHROME_VX800:
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		vq_start_low |= 0x20000000;
+		vq_end_low |= 0x20000000;
+		vq_high |= 0x20000000;
+		vq_len |= 0x20000000;
+
+		writel(0x00100000, engine + VIA_REG_CR_TRANSET);
+		writel(vq_high, engine + VIA_REG_CR_TRANSPACE);
+		writel(vq_start_low, engine + VIA_REG_CR_TRANSPACE);
+		writel(vq_end_low, engine + VIA_REG_CR_TRANSPACE);
+		writel(vq_len, engine + VIA_REG_CR_TRANSPACE);
+		writel(0x74301001, engine + VIA_REG_CR_TRANSPACE);
+		writel(0x00000000, engine + VIA_REG_CR_TRANSPACE);
+		break;
+	default:
+		writel(0x00FE0000, engine + VIA_REG_TRANSET);
+		writel(0x080003FE, engine + VIA_REG_TRANSPACE);
+		writel(0x0A00027C, engine + VIA_REG_TRANSPACE);
+		writel(0x0B000260, engine + VIA_REG_TRANSPACE);
+		writel(0x0C000274, engine + VIA_REG_TRANSPACE);
+		writel(0x0D000264, engine + VIA_REG_TRANSPACE);
+		writel(0x0E000000, engine + VIA_REG_TRANSPACE);
+		writel(0x0F000020, engine + VIA_REG_TRANSPACE);
+		writel(0x1000027E, engine + VIA_REG_TRANSPACE);
+		writel(0x110002FE, engine + VIA_REG_TRANSPACE);
+		writel(0x200F0060, engine + VIA_REG_TRANSPACE);
+
+		writel(0x00000006, engine + VIA_REG_TRANSPACE);
+		writel(0x40008C0F, engine + VIA_REG_TRANSPACE);
+		writel(0x44000000, engine + VIA_REG_TRANSPACE);
+		writel(0x45080C04, engine + VIA_REG_TRANSPACE);
+		writel(0x46800408, engine + VIA_REG_TRANSPACE);
+
+		writel(vq_high, engine + VIA_REG_TRANSPACE);
+		writel(vq_start_low, engine + VIA_REG_TRANSPACE);
+		writel(vq_end_low, engine + VIA_REG_TRANSPACE);
+		writel(vq_len, engine + VIA_REG_TRANSPACE);
+		break;
+	}
+
+	/* Set Cursor Image Base Address */
+	writel(viapar->shared->cursor_vram_addr, engine + VIA_REG_CURSOR_MODE);
+	writel(0x0, engine + VIA_REG_CURSOR_POS);
+	writel(0x0, engine + VIA_REG_CURSOR_ORG);
+	writel(0x0, engine + VIA_REG_CURSOR_BG);
+	writel(0x0, engine + VIA_REG_CURSOR_FG);
+	return;
+}
+
+void viafb_show_hw_cursor(struct fb_info *info, int Status)
+{
+	struct viafb_par *viapar = info->par;
+	u32 temp, iga_path = viapar->iga_path;
+
+	temp = readl(viapar->shared->vdev->engine_mmio + VIA_REG_CURSOR_MODE);
+	switch (Status) {
+	case HW_Cursor_ON:
+		temp |= 0x1;
+		break;
+	case HW_Cursor_OFF:
+		temp &= 0xFFFFFFFE;
+		break;
+	}
+	switch (iga_path) {
+	case IGA2:
+		temp |= 0x80000000;
+		break;
+	case IGA1:
+	default:
+		temp &= 0x7FFFFFFF;
+	}
+	writel(temp, viapar->shared->vdev->engine_mmio + VIA_REG_CURSOR_MODE);
+}
+
+void viafb_wait_engine_idle(struct fb_info *info)
+{
+	struct viafb_par *viapar = info->par;
+	int loop = 0;
+	u32 mask;
+	void __iomem *engine = viapar->shared->vdev->engine_mmio;
+
+	switch (viapar->shared->chip_info.twod_engine) {
+	case VIA_2D_ENG_H5:
+	case VIA_2D_ENG_M1:
+		mask = VIA_CMD_RGTR_BUSY_M1 | VIA_2D_ENG_BUSY_M1 |
+			      VIA_3D_ENG_BUSY_M1;
+		break;
+	default:
+		while (!(readl(engine + VIA_REG_STATUS) &
+				VIA_VR_QUEUE_BUSY) && (loop < MAXLOOP)) {
+			loop++;
+			cpu_relax();
+		}
+		mask = VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY | VIA_3D_ENG_BUSY;
+		break;
+	}
+
+	while ((readl(engine + VIA_REG_STATUS) & mask) && (loop < MAXLOOP)) {
+		loop++;
+		cpu_relax();
+	}
+
+	if (loop >= MAXLOOP)
+		printk(KERN_ERR "viafb_wait_engine_idle: not syncing\n");
+}
diff --git a/drivers/video/fbdev/via/accel.h b/drivers/video/fbdev/via/accel.h
new file mode 100644
index 0000000000..564ed0291d
--- /dev/null
+++ b/drivers/video/fbdev/via/accel.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __ACCEL_H__
+#define __ACCEL_H__
+
+#define FB_ACCEL_VIA_UNICHROME  50
+
+/* MMIO Base Address Definition */
+#define MMIO_VGABASE                0x8000
+#define MMIO_CR_READ                (MMIO_VGABASE + 0x3D4)
+#define MMIO_CR_WRITE               (MMIO_VGABASE + 0x3D5)
+#define MMIO_SR_READ                (MMIO_VGABASE + 0x3C4)
+#define MMIO_SR_WRITE               (MMIO_VGABASE + 0x3C5)
+
+/* HW Cursor Status Define */
+#define HW_Cursor_ON    0
+#define HW_Cursor_OFF   1
+
+#define CURSOR_SIZE     (8 * 1024)
+#define VQ_SIZE         (256 * 1024)
+
+#define VIA_MMIO_BLTBASE        0x200000
+#define VIA_MMIO_BLTSIZE        0x200000
+
+/* Defines for 2D registers */
+#define VIA_REG_GECMD           0x000
+#define VIA_REG_GEMODE          0x004
+#define VIA_REG_SRCPOS          0x008
+#define VIA_REG_DSTPOS          0x00C
+/* width and height */
+#define VIA_REG_DIMENSION       0x010
+#define VIA_REG_PATADDR         0x014
+#define VIA_REG_FGCOLOR         0x018
+#define VIA_REG_BGCOLOR         0x01C
+/* top and left of clipping */
+#define VIA_REG_CLIPTL          0x020
+/* bottom and right of clipping */
+#define VIA_REG_CLIPBR          0x024
+#define VIA_REG_OFFSET          0x028
+/* color key control */
+#define VIA_REG_KEYCONTROL      0x02C
+#define VIA_REG_SRCBASE         0x030
+#define VIA_REG_DSTBASE         0x034
+/* pitch of src and dst */
+#define VIA_REG_PITCH           0x038
+#define VIA_REG_MONOPAT0        0x03C
+#define VIA_REG_MONOPAT1        0x040
+/* from 0x100 to 0x1ff */
+#define VIA_REG_COLORPAT        0x100
+
+/* defines for VIA 2D registers for vt3353/3409 (M1 engine)*/
+#define VIA_REG_GECMD_M1        0x000
+#define VIA_REG_GEMODE_M1       0x004
+#define VIA_REG_GESTATUS_M1     0x004       /* as same as VIA_REG_GEMODE */
+#define VIA_REG_PITCH_M1        0x008       /* pitch of src and dst */
+#define VIA_REG_DIMENSION_M1    0x00C       /* width and height */
+#define VIA_REG_DSTPOS_M1       0x010
+#define VIA_REG_LINE_XY_M1      0x010
+#define VIA_REG_DSTBASE_M1      0x014
+#define VIA_REG_SRCPOS_M1       0x018
+#define VIA_REG_LINE_K1K2_M1    0x018
+#define VIA_REG_SRCBASE_M1      0x01C
+#define VIA_REG_PATADDR_M1      0x020
+#define VIA_REG_MONOPAT0_M1     0x024
+#define VIA_REG_MONOPAT1_M1     0x028
+#define VIA_REG_OFFSET_M1       0x02C
+#define VIA_REG_LINE_ERROR_M1   0x02C
+#define VIA_REG_CLIPTL_M1       0x040       /* top and left of clipping */
+#define VIA_REG_CLIPBR_M1       0x044       /* bottom and right of clipping */
+#define VIA_REG_KEYCONTROL_M1   0x048       /* color key control */
+#define VIA_REG_FGCOLOR_M1      0x04C
+#define VIA_REG_DSTCOLORKEY_M1  0x04C       /* as same as VIA_REG_FG */
+#define VIA_REG_BGCOLOR_M1      0x050
+#define VIA_REG_SRCCOLORKEY_M1  0x050       /* as same as VIA_REG_BG */
+#define VIA_REG_MONOPATFGC_M1   0x058       /* Add BG color of Pattern. */
+#define VIA_REG_MONOPATBGC_M1   0x05C       /* Add FG color of Pattern. */
+#define VIA_REG_COLORPAT_M1     0x100       /* from 0x100 to 0x1ff */
+
+/* VIA_REG_PITCH(0x38): Pitch Setting */
+#define VIA_PITCH_ENABLE        0x80000000
+
+/* defines for VIA HW cursor registers */
+#define VIA_REG_CURSOR_MODE     0x2D0
+#define VIA_REG_CURSOR_POS      0x2D4
+#define VIA_REG_CURSOR_ORG      0x2D8
+#define VIA_REG_CURSOR_BG       0x2DC
+#define VIA_REG_CURSOR_FG       0x2E0
+
+/* VIA_REG_GEMODE(0x04): GE mode */
+#define VIA_GEM_8bpp            0x00000000
+#define VIA_GEM_16bpp           0x00000100
+#define VIA_GEM_32bpp           0x00000300
+
+/* VIA_REG_GECMD(0x00): 2D Engine Command  */
+#define VIA_GEC_NOOP            0x00000000
+#define VIA_GEC_BLT             0x00000001
+#define VIA_GEC_LINE            0x00000005
+
+/* Rotate Command */
+#define VIA_GEC_ROT             0x00000008
+
+#define VIA_GEC_SRC_XY          0x00000000
+#define VIA_GEC_SRC_LINEAR      0x00000010
+#define VIA_GEC_DST_XY          0x00000000
+#define VIA_GEC_DST_LINRAT      0x00000020
+
+#define VIA_GEC_SRC_FB          0x00000000
+#define VIA_GEC_SRC_SYS         0x00000040
+#define VIA_GEC_DST_FB          0x00000000
+#define VIA_GEC_DST_SYS         0x00000080
+
+/* source is mono */
+#define VIA_GEC_SRC_MONO        0x00000100
+/* pattern is mono */
+#define VIA_GEC_PAT_MONO        0x00000200
+/* mono src is opaque */
+#define VIA_GEC_MSRC_OPAQUE     0x00000000
+/* mono src is transparent */
+#define VIA_GEC_MSRC_TRANS      0x00000400
+/* pattern is in frame buffer */
+#define VIA_GEC_PAT_FB          0x00000000
+/* pattern is from reg setting */
+#define VIA_GEC_PAT_REG         0x00000800
+
+#define VIA_GEC_CLIP_DISABLE    0x00000000
+#define VIA_GEC_CLIP_ENABLE     0x00001000
+
+#define VIA_GEC_FIXCOLOR_PAT    0x00002000
+
+#define VIA_GEC_INCX            0x00000000
+#define VIA_GEC_DECY            0x00004000
+#define VIA_GEC_INCY            0x00000000
+#define VIA_GEC_DECX            0x00008000
+/* mono pattern is opaque */
+#define VIA_GEC_MPAT_OPAQUE     0x00000000
+/* mono pattern is transparent */
+#define VIA_GEC_MPAT_TRANS      0x00010000
+
+#define VIA_GEC_MONO_UNPACK     0x00000000
+#define VIA_GEC_MONO_PACK       0x00020000
+#define VIA_GEC_MONO_DWORD      0x00000000
+#define VIA_GEC_MONO_WORD       0x00040000
+#define VIA_GEC_MONO_BYTE       0x00080000
+
+#define VIA_GEC_LASTPIXEL_ON    0x00000000
+#define VIA_GEC_LASTPIXEL_OFF   0x00100000
+#define VIA_GEC_X_MAJOR         0x00000000
+#define VIA_GEC_Y_MAJOR         0x00200000
+#define VIA_GEC_QUICK_START     0x00800000
+
+/* defines for VIA 3D registers */
+#define VIA_REG_STATUS          0x400
+#define VIA_REG_CR_TRANSET      0x41C
+#define VIA_REG_CR_TRANSPACE	0x420
+#define VIA_REG_TRANSET         0x43C
+#define VIA_REG_TRANSPACE       0x440
+
+/* VIA_REG_STATUS(0x400): Engine Status */
+
+/* Command Regulator is busy */
+#define VIA_CMD_RGTR_BUSY       0x00000080
+/* 2D Engine is busy */
+#define VIA_2D_ENG_BUSY         0x00000002
+/* 3D Engine is busy */
+#define VIA_3D_ENG_BUSY         0x00000001
+/* Virtual Queue is busy */
+#define VIA_VR_QUEUE_BUSY       0x00020000
+
+/* VIA_REG_STATUS(0x400): Engine Status for H5 */
+#define VIA_CMD_RGTR_BUSY_H5   0x00000010  /* Command Regulator is busy */
+#define VIA_2D_ENG_BUSY_H5     0x00000002  /* 2D Engine is busy */
+#define VIA_3D_ENG_BUSY_H5     0x00001FE1  /* 3D Engine is busy */
+#define VIA_VR_QUEUE_BUSY_H5   0x00000004  /* Virtual Queue is busy */
+
+/* VIA_REG_STATUS(0x400): Engine Status for VT3353/3409 */
+#define VIA_CMD_RGTR_BUSY_M1   0x00000010  /* Command Regulator is busy */
+#define VIA_2D_ENG_BUSY_M1     0x00000002  /* 2D Engine is busy */
+#define VIA_3D_ENG_BUSY_M1     0x00001FE1  /* 3D Engine is busy */
+#define VIA_VR_QUEUE_BUSY_M1   0x00000004  /* Virtual Queue is busy */
+
+#define MAXLOOP                 0xFFFFFF
+
+#define VIA_BITBLT_COLOR	1
+#define VIA_BITBLT_MONO		2
+#define VIA_BITBLT_FILL		3
+
+int viafb_setup_engine(struct fb_info *info);
+void viafb_reset_engine(struct viafb_par *viapar);
+void viafb_show_hw_cursor(struct fb_info *info, int Status);
+void viafb_wait_engine_idle(struct fb_info *info);
+
+#endif /* __ACCEL_H__ */
diff --git a/drivers/video/fbdev/via/chip.h b/drivers/video/fbdev/via/chip.h
new file mode 100644
index 0000000000..f0a19cbcb9
--- /dev/null
+++ b/drivers/video/fbdev/via/chip.h
@@ -0,0 +1,162 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#ifndef __CHIP_H__
+#define __CHIP_H__
+
+#include "global.h"
+
+/***************************************/
+/* Definition Graphic Chip Information */
+/***************************************/
+
+#define     PCI_VIA_VENDOR_ID       0x1106
+
+/* Define VIA Graphic Chip Name */
+#define     UNICHROME_CLE266        1
+#define     UNICHROME_CLE266_DID    0x3122
+#define     CLE266_REVISION_AX      0x0A
+#define     CLE266_REVISION_CX      0x0C
+
+#define     UNICHROME_K400          2
+#define     UNICHROME_K400_DID      0x7205
+
+#define     UNICHROME_K800          3
+#define     UNICHROME_K800_DID      0x3108
+
+#define     UNICHROME_PM800         4
+#define     UNICHROME_PM800_DID     0x3118
+
+#define     UNICHROME_CN700         5
+#define     UNICHROME_CN700_DID     0x3344
+
+#define     UNICHROME_CX700         6
+#define     UNICHROME_CX700_DID     0x3157
+#define     CX700_REVISION_700      0x0
+#define     CX700_REVISION_700M     0x1
+#define     CX700_REVISION_700M2    0x2
+
+#define     UNICHROME_CN750         7
+#define     UNICHROME_CN750_DID     0x3225
+
+#define     UNICHROME_K8M890        8
+#define     UNICHROME_K8M890_DID    0x3230
+
+#define     UNICHROME_P4M890        9
+#define     UNICHROME_P4M890_DID    0x3343
+
+#define     UNICHROME_P4M900        10
+#define     UNICHROME_P4M900_DID    0x3371
+
+#define     UNICHROME_VX800         11
+#define     UNICHROME_VX800_DID     0x1122
+
+#define     UNICHROME_VX855         12
+#define     UNICHROME_VX855_DID     0x5122
+
+#define     UNICHROME_VX900         13
+#define     UNICHROME_VX900_DID     0x7122
+
+/**************************************************/
+/* Definition TMDS Trasmitter Information         */
+/**************************************************/
+
+/* Definition TMDS Trasmitter Index */
+#define     NON_TMDS_TRANSMITTER    0x00
+#define     VT1632_TMDS             0x01
+#define     INTEGRATED_TMDS         0x42
+
+/* Definition TMDS Trasmitter I2C Slave Address */
+#define     VT1632_TMDS_I2C_ADDR    0x10
+
+/**************************************************/
+/* Definition LVDS Trasmitter Information         */
+/**************************************************/
+
+/* Definition LVDS Trasmitter Index */
+#define     NON_LVDS_TRANSMITTER    0x00
+#define     VT1631_LVDS             0x01
+#define     VT1636_LVDS             0x0E
+#define     INTEGRATED_LVDS         0x41
+
+/* Definition Digital Transmitter Mode */
+#define     TX_DATA_12_BITS         0x01
+#define     TX_DATA_24_BITS         0x02
+#define     TX_DATA_DDR_MODE        0x04
+#define     TX_DATA_SDR_MODE        0x08
+
+/* Definition LVDS Trasmitter I2C Slave Address */
+#define     VT1631_LVDS_I2C_ADDR    0x70
+#define     VT3271_LVDS_I2C_ADDR    0x80
+#define     VT1636_LVDS_I2C_ADDR    0x80
+
+struct tmds_chip_information {
+	int tmds_chip_name;
+	int tmds_chip_slave_addr;
+	int output_interface;
+	int i2c_port;
+};
+
+struct lvds_chip_information {
+	int lvds_chip_name;
+	int lvds_chip_slave_addr;
+	int output_interface;
+	int i2c_port;
+};
+
+/* The type of 2D engine */
+enum via_2d_engine {
+	VIA_2D_ENG_H2,
+	VIA_2D_ENG_H5,
+	VIA_2D_ENG_M1,
+};
+
+struct chip_information {
+	int gfx_chip_name;
+	int gfx_chip_revision;
+	enum via_2d_engine twod_engine;
+	struct tmds_chip_information tmds_chip_info;
+	struct lvds_chip_information lvds_chip_info;
+	struct lvds_chip_information lvds_chip_info2;
+};
+
+struct tmds_setting_information {
+	int iga_path;
+	int h_active;
+	int v_active;
+	int max_pixel_clock;
+};
+
+struct lvds_setting_information {
+	int iga_path;
+	int lcd_panel_hres;
+	int lcd_panel_vres;
+	int display_method;
+	int device_lcd_dualedge;
+	int LCDDithering;
+	int lcd_mode;
+	u32 vclk;		/*panel mode clock value */
+};
+
+struct GFX_DPA_SETTING {
+	int ClkRangeIndex;
+	u8 DVP0;		/* CR96[3:0] */
+	u8 DVP0DataDri_S1;	/* SR2A[5]   */
+	u8 DVP0DataDri_S;	/* SR1B[1]   */
+	u8 DVP0ClockDri_S1;	/* SR2A[4]   */
+	u8 DVP0ClockDri_S;	/* SR1E[2]   */
+	u8 DVP1;		/* CR9B[3:0] */
+	u8 DVP1Driving;		/* SR65[3:0], Data and Clock driving */
+	u8 DFPHigh;		/* CR97[3:0] */
+	u8 DFPLow;		/* CR99[3:0] */
+
+};
+
+struct VT1636_DPA_SETTING {
+	u8 CLK_SEL_ST1;
+	u8 CLK_SEL_ST2;
+};
+#endif /* __CHIP_H__ */
diff --git a/drivers/video/fbdev/via/debug.h b/drivers/video/fbdev/via/debug.h
new file mode 100644
index 0000000000..80fdfe4171
--- /dev/null
+++ b/drivers/video/fbdev/via/debug.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#ifndef __DEBUG_H__
+#define __DEBUG_H__
+
+#include <linux/printk.h>
+
+#ifndef VIAFB_DEBUG
+#define VIAFB_DEBUG 0
+#endif
+
+#if VIAFB_DEBUG
+#define DEBUG_MSG(f, a...)   printk(f, ## a)
+#else
+#define DEBUG_MSG(f, a...)   no_printk(f, ## a)
+#endif
+
+#define VIAFB_WARN 0
+#if VIAFB_WARN
+#define WARN_MSG(f, a...)   printk(f, ## a)
+#else
+#define WARN_MSG(f, a...)   no_printk(f, ## a)
+#endif
+
+#endif /* __DEBUG_H__ */
diff --git a/drivers/video/fbdev/via/dvi.c b/drivers/video/fbdev/via/dvi.c
new file mode 100644
index 0000000000..13147e3066
--- /dev/null
+++ b/drivers/video/fbdev/via/dvi.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+#include "global.h"
+
+static void tmds_register_write(int index, u8 data);
+static int tmds_register_read(int index);
+static int tmds_register_read_bytes(int index, u8 *buff, int buff_len);
+static void dvi_get_panel_size_from_DDCv1(
+	struct tmds_chip_information *tmds_chip,
+	struct tmds_setting_information *tmds_setting);
+static int viafb_dvi_query_EDID(void);
+
+static inline bool check_tmds_chip(int device_id_subaddr, int device_id)
+{
+	return tmds_register_read(device_id_subaddr) == device_id;
+}
+
+void viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
+			 struct tmds_setting_information *tmds_setting)
+{
+	DEBUG_MSG(KERN_INFO "viafb_init_dvi_size()\n");
+
+	viafb_dvi_sense();
+	if (viafb_dvi_query_EDID() == 1)
+		dvi_get_panel_size_from_DDCv1(tmds_chip, tmds_setting);
+
+	return;
+}
+
+bool viafb_tmds_trasmitter_identify(void)
+{
+	unsigned char sr2a = 0, sr1e = 0, sr3e = 0;
+
+	/* Turn on ouputting pad */
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_K8M890:
+	    /*=* DFP Low Pad on *=*/
+		sr2a = viafb_read_reg(VIASR, SR2A);
+		viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
+		break;
+
+	case UNICHROME_P4M900:
+	case UNICHROME_P4M890:
+		/* DFP Low Pad on */
+		sr2a = viafb_read_reg(VIASR, SR2A);
+		viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
+		/* DVP0 Pad on */
+		sr1e = viafb_read_reg(VIASR, SR1E);
+		viafb_write_reg_mask(SR1E, VIASR, 0xC0, BIT6 + BIT7);
+		break;
+
+	default:
+	    /* DVP0/DVP1 Pad on */
+		sr1e = viafb_read_reg(VIASR, SR1E);
+		viafb_write_reg_mask(SR1E, VIASR, 0xF0, BIT4 +
+			BIT5 + BIT6 + BIT7);
+	    /* SR3E[1]Multi-function selection:
+	    0 = Emulate I2C and DDC bus by GPIO2/3/4. */
+		sr3e = viafb_read_reg(VIASR, SR3E);
+		viafb_write_reg_mask(SR3E, VIASR, 0x0, BIT5);
+		break;
+	}
+
+	/* Check for VT1632: */
+	viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = VT1632_TMDS;
+	viaparinfo->chip_info->
+		tmds_chip_info.tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
+	viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_31;
+	if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
+		/*
+		 * Currently only support 12bits,dual edge,add 24bits mode later
+		 */
+		tmds_register_write(0x08, 0x3b);
+
+		DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
+		DEBUG_MSG(KERN_INFO "\n %2d",
+			  viaparinfo->chip_info->tmds_chip_info.tmds_chip_name);
+		DEBUG_MSG(KERN_INFO "\n %2d",
+			  viaparinfo->chip_info->tmds_chip_info.i2c_port);
+		return true;
+	} else {
+		viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_2C;
+		if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
+			tmds_register_write(0x08, 0x3b);
+			DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
+			DEBUG_MSG(KERN_INFO "\n %2d",
+				  viaparinfo->chip_info->
+				  tmds_chip_info.tmds_chip_name);
+			DEBUG_MSG(KERN_INFO "\n %2d",
+				  viaparinfo->chip_info->
+				  tmds_chip_info.i2c_port);
+			return true;
+		}
+	}
+
+	viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = INTEGRATED_TMDS;
+
+	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) &&
+	    ((viafb_display_hardware_layout == HW_LAYOUT_DVI_ONLY) ||
+	     (viafb_display_hardware_layout == HW_LAYOUT_LCD_DVI))) {
+		DEBUG_MSG(KERN_INFO "\n Integrated TMDS ! \n");
+		return true;
+	}
+
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_K8M890:
+		viafb_write_reg(SR2A, VIASR, sr2a);
+		break;
+
+	case UNICHROME_P4M900:
+	case UNICHROME_P4M890:
+		viafb_write_reg(SR2A, VIASR, sr2a);
+		viafb_write_reg(SR1E, VIASR, sr1e);
+		break;
+
+	default:
+		viafb_write_reg(SR1E, VIASR, sr1e);
+		viafb_write_reg(SR3E, VIASR, sr3e);
+		break;
+	}
+
+	viaparinfo->chip_info->
+		tmds_chip_info.tmds_chip_name = NON_TMDS_TRANSMITTER;
+	viaparinfo->chip_info->tmds_chip_info.
+		tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
+	return false;
+}
+
+static void tmds_register_write(int index, u8 data)
+{
+	viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
+			    viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
+			    index, data);
+}
+
+static int tmds_register_read(int index)
+{
+	u8 data;
+
+	viafb_i2c_readbyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
+			   (u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
+			   (u8) index, &data);
+	return data;
+}
+
+static int tmds_register_read_bytes(int index, u8 *buff, int buff_len)
+{
+	viafb_i2c_readbytes(viaparinfo->chip_info->tmds_chip_info.i2c_port,
+			    (u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
+			    (u8) index, buff, buff_len);
+	return 0;
+}
+
+/* DVI Set Mode */
+void viafb_dvi_set_mode(const struct fb_var_screeninfo *var,
+	u16 cxres, u16 cyres, int iga)
+{
+	struct fb_var_screeninfo dvi_var = *var;
+	const struct fb_videomode *rb_mode;
+	int maxPixelClock;
+
+	maxPixelClock = viaparinfo->shared->tmds_setting_info.max_pixel_clock;
+	if (maxPixelClock && PICOS2KHZ(var->pixclock) / 1000 > maxPixelClock) {
+		rb_mode = viafb_get_best_rb_mode(var->xres, var->yres, 60);
+		if (rb_mode)
+			viafb_fill_var_timing_info(&dvi_var, rb_mode);
+	}
+
+	viafb_fill_crtc_timing(&dvi_var, cxres, cyres, iga);
+}
+
+/* Sense DVI Connector */
+int viafb_dvi_sense(void)
+{
+	u8 RegSR1E = 0, RegSR3E = 0, RegCR6B = 0, RegCR91 = 0,
+		RegCR93 = 0, RegCR9B = 0, data;
+	int ret = false;
+
+	DEBUG_MSG(KERN_INFO "viafb_dvi_sense!!\n");
+
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
+		/* DI1 Pad on */
+		RegSR1E = viafb_read_reg(VIASR, SR1E);
+		viafb_write_reg(SR1E, VIASR, RegSR1E | 0x30);
+
+		/* CR6B[0]VCK Input Selection: 1 = External clock. */
+		RegCR6B = viafb_read_reg(VIACR, CR6B);
+		viafb_write_reg(CR6B, VIACR, RegCR6B | 0x08);
+
+		/* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
+		   [0] Software Control Power Sequence */
+		RegCR91 = viafb_read_reg(VIACR, CR91);
+		viafb_write_reg(CR91, VIACR, 0x1D);
+
+		/* CR93[7] DI1 Data Source Selection: 1 = DSP2.
+		   CR93[5] DI1 Clock Source: 1 = internal.
+		   CR93[4] DI1 Clock Polarity.
+		   CR93[3:1] DI1 Clock Adjust. CR93[0] DI1 enable */
+		RegCR93 = viafb_read_reg(VIACR, CR93);
+		viafb_write_reg(CR93, VIACR, 0x01);
+	} else {
+		/* DVP0/DVP1 Pad on */
+		RegSR1E = viafb_read_reg(VIASR, SR1E);
+		viafb_write_reg(SR1E, VIASR, RegSR1E | 0xF0);
+
+		/* SR3E[1]Multi-function selection:
+		   0 = Emulate I2C and DDC bus by GPIO2/3/4. */
+		RegSR3E = viafb_read_reg(VIASR, SR3E);
+		viafb_write_reg(SR3E, VIASR, RegSR3E & (~0x20));
+
+		/* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
+		   [0] Software Control Power Sequence */
+		RegCR91 = viafb_read_reg(VIACR, CR91);
+		viafb_write_reg(CR91, VIACR, 0x1D);
+
+		/*CR9B[4] DVP1 Data Source Selection: 1 = From secondary
+		display.CR9B[2:0] DVP1 Clock Adjust */
+		RegCR9B = viafb_read_reg(VIACR, CR9B);
+		viafb_write_reg(CR9B, VIACR, 0x01);
+	}
+
+	data = (u8) tmds_register_read(0x09);
+	if (data & 0x04)
+		ret = true;
+
+	if (ret == false) {
+		if (viafb_dvi_query_EDID())
+			ret = true;
+	}
+
+	/* Restore status */
+	viafb_write_reg(SR1E, VIASR, RegSR1E);
+	viafb_write_reg(CR91, VIACR, RegCR91);
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
+		viafb_write_reg(CR6B, VIACR, RegCR6B);
+		viafb_write_reg(CR93, VIACR, RegCR93);
+	} else {
+		viafb_write_reg(SR3E, VIASR, RegSR3E);
+		viafb_write_reg(CR9B, VIACR, RegCR9B);
+	}
+
+	return ret;
+}
+
+/* Query Flat Panel's EDID Table Version Through DVI Connector */
+static int viafb_dvi_query_EDID(void)
+{
+	u8 data0, data1;
+	int restore;
+
+	DEBUG_MSG(KERN_INFO "viafb_dvi_query_EDID!!\n");
+
+	restore = viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr;
+	viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr = 0xA0;
+
+	data0 = (u8) tmds_register_read(0x00);
+	data1 = (u8) tmds_register_read(0x01);
+	if ((data0 == 0) && (data1 == 0xFF)) {
+		viaparinfo->chip_info->
+			tmds_chip_info.tmds_chip_slave_addr = restore;
+		return EDID_VERSION_1;	/* Found EDID1 Table */
+	}
+
+	return false;
+}
+
+/* Get Panel Size Using EDID1 Table */
+static void dvi_get_panel_size_from_DDCv1(
+	struct tmds_chip_information *tmds_chip,
+	struct tmds_setting_information *tmds_setting)
+{
+	int i, restore;
+	unsigned char EDID_DATA[18];
+
+	DEBUG_MSG(KERN_INFO "\n dvi_get_panel_size_from_DDCv1 \n");
+
+	restore = tmds_chip->tmds_chip_slave_addr;
+	tmds_chip->tmds_chip_slave_addr = 0xA0;
+	for (i = 0x25; i < 0x6D; i++) {
+		switch (i) {
+		case 0x36:
+		case 0x48:
+		case 0x5A:
+		case 0x6C:
+			tmds_register_read_bytes(i, EDID_DATA, 10);
+			if (!(EDID_DATA[0] || EDID_DATA[1])) {
+				/* The first two byte must be zero. */
+				if (EDID_DATA[3] == 0xFD) {
+					/* To get max pixel clock. */
+					tmds_setting->max_pixel_clock =
+						EDID_DATA[9] * 10;
+				}
+			}
+			break;
+
+		default:
+			break;
+		}
+	}
+
+	DEBUG_MSG(KERN_INFO "DVI max pixelclock = %d\n",
+		tmds_setting->max_pixel_clock);
+	tmds_chip->tmds_chip_slave_addr = restore;
+}
+
+/* If Disable DVI, turn off pad */
+void viafb_dvi_disable(void)
+{
+	if (viaparinfo->chip_info->
+		tmds_chip_info.output_interface == INTERFACE_TMDS)
+		/* Turn off TMDS power. */
+		viafb_write_reg(CRD2, VIACR,
+		viafb_read_reg(VIACR, CRD2) | 0x08);
+}
+
+static void dvi_patch_skew_dvp0(void)
+{
+	/* Reset data driving first: */
+	viafb_write_reg_mask(SR1B, VIASR, 0, BIT1);
+	viafb_write_reg_mask(SR2A, VIASR, 0, BIT4);
+
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_P4M890:
+		{
+			if ((viaparinfo->tmds_setting_info->h_active == 1600) &&
+				(viaparinfo->tmds_setting_info->v_active ==
+				1200))
+				viafb_write_reg_mask(CR96, VIACR, 0x03,
+					       BIT0 + BIT1 + BIT2);
+			else
+				viafb_write_reg_mask(CR96, VIACR, 0x07,
+					       BIT0 + BIT1 + BIT2);
+			break;
+		}
+
+	case UNICHROME_P4M900:
+		{
+			viafb_write_reg_mask(CR96, VIACR, 0x07,
+				       BIT0 + BIT1 + BIT2 + BIT3);
+			viafb_write_reg_mask(SR1B, VIASR, 0x02, BIT1);
+			viafb_write_reg_mask(SR2A, VIASR, 0x10, BIT4);
+			break;
+		}
+
+	default:
+		{
+			break;
+		}
+	}
+}
+
+static void dvi_patch_skew_dvp_low(void)
+{
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_K8M890:
+		{
+			viafb_write_reg_mask(CR99, VIACR, 0x03, BIT0 + BIT1);
+			break;
+		}
+
+	case UNICHROME_P4M900:
+		{
+			viafb_write_reg_mask(CR99, VIACR, 0x08,
+				       BIT0 + BIT1 + BIT2 + BIT3);
+			break;
+		}
+
+	case UNICHROME_P4M890:
+		{
+			viafb_write_reg_mask(CR99, VIACR, 0x0F,
+				       BIT0 + BIT1 + BIT2 + BIT3);
+			break;
+		}
+
+	default:
+		{
+			break;
+		}
+	}
+}
+
+/* If Enable DVI, turn off pad */
+void viafb_dvi_enable(void)
+{
+	u8 data;
+
+	switch (viaparinfo->chip_info->tmds_chip_info.output_interface) {
+	case INTERFACE_DVP0:
+		viafb_write_reg_mask(CR6B, VIACR, 0x01, BIT0);
+		viafb_write_reg_mask(CR6C, VIACR, 0x21, BIT0 + BIT5);
+		dvi_patch_skew_dvp0();
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			tmds_register_write(0x88, 0x3b);
+		else
+			/*clear CR91[5] to direct on display period
+			   in the secondary diplay path */
+			via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
+		break;
+
+	case INTERFACE_DVP1:
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			viafb_write_reg_mask(CR93, VIACR, 0x21, BIT0 + BIT5);
+
+		/*fix dvi cann't be enabled with MB VT5718C4 - Al Zhang */
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			tmds_register_write(0x88, 0x3b);
+		else
+			/*clear CR91[5] to direct on display period
+			  in the secondary diplay path */
+			via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
+
+		/*fix DVI cannot enable on EPIA-M board */
+		if (viafb_platform_epia_dvi == 1) {
+			viafb_write_reg_mask(CR91, VIACR, 0x1f, 0x1f);
+			viafb_write_reg_mask(CR88, VIACR, 0x00, BIT6 + BIT0);
+			if (viafb_bus_width == 24) {
+				if (viafb_device_lcd_dualedge == 1)
+					data = 0x3F;
+				else
+					data = 0x37;
+				viafb_i2c_writebyte(viaparinfo->chip_info->
+					tmds_chip_info.i2c_port,
+					viaparinfo->chip_info->
+					tmds_chip_info.tmds_chip_slave_addr,
+					0x08, data);
+			}
+		}
+		break;
+
+	case INTERFACE_DFP_HIGH:
+		if (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
+			via_write_reg_mask(VIACR, CR97, 0x03, 0x03);
+
+		via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
+		break;
+
+	case INTERFACE_DFP_LOW:
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			break;
+
+		dvi_patch_skew_dvp_low();
+		via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
+		break;
+
+	case INTERFACE_TMDS:
+		/* Turn on Display period in the panel path. */
+		viafb_write_reg_mask(CR91, VIACR, 0, BIT7);
+
+		/* Turn on TMDS power. */
+		viafb_write_reg_mask(CRD2, VIACR, 0, BIT3);
+		break;
+	}
+
+	if (viaparinfo->tmds_setting_info->iga_path == IGA2) {
+		/* Disable LCD Scaling */
+		viafb_write_reg_mask(CR79, VIACR, 0x00, BIT0);
+	}
+}
diff --git a/drivers/video/fbdev/via/dvi.h b/drivers/video/fbdev/via/dvi.h
new file mode 100644
index 0000000000..60ab61009e
--- /dev/null
+++ b/drivers/video/fbdev/via/dvi.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __DVI_H__
+#define __DVI_H__
+
+/*Definition TMDS Device ID register*/
+#define     VT1632_DEVICE_ID_REG        0x02
+#define     VT1632_DEVICE_ID            0x92
+
+#define     GET_DVI_SIZE_BY_SYSTEM_BIOS     0x01
+#define     GET_DVI_SIZE_BY_VGA_BIOS        0x02
+#define     GET_DVI_SZIE_BY_HW_STRAPPING    0x03
+
+/* Definition DVI Panel ID*/
+/* Resolution: 640x480,   Channel: single, Dithering: Enable */
+#define     DVI_PANEL_ID0_640X480       0x00
+/* Resolution: 800x600,   Channel: single, Dithering: Enable */
+#define     DVI_PANEL_ID1_800x600       0x01
+/* Resolution: 1024x768,  Channel: single, Dithering: Enable */
+#define     DVI_PANEL_ID1_1024x768      0x02
+/* Resolution: 1280x768,  Channel: single, Dithering: Enable */
+#define     DVI_PANEL_ID1_1280x768      0x03
+/* Resolution: 1280x1024, Channel: dual,   Dithering: Enable */
+#define     DVI_PANEL_ID1_1280x1024     0x04
+/* Resolution: 1400x1050, Channel: dual,   Dithering: Enable */
+#define     DVI_PANEL_ID1_1400x1050     0x05
+/* Resolution: 1600x1200, Channel: dual,   Dithering: Enable */
+#define     DVI_PANEL_ID1_1600x1200     0x06
+
+/* Define the version of EDID*/
+#define     EDID_VERSION_1      1
+#define     EDID_VERSION_2      2
+
+#define     DEV_CONNECT_DVI     0x01
+#define     DEV_CONNECT_HDMI    0x02
+
+int viafb_dvi_sense(void);
+void viafb_dvi_disable(void);
+void viafb_dvi_enable(void);
+bool viafb_tmds_trasmitter_identify(void);
+void viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
+	struct tmds_setting_information *tmds_setting);
+void viafb_dvi_set_mode(const struct fb_var_screeninfo *var,
+	u16 cxres, u16 cyres, int iga);
+
+#endif /* __DVI_H__ */
diff --git a/drivers/video/fbdev/via/global.c b/drivers/video/fbdev/via/global.c
new file mode 100644
index 0000000000..306d89651a
--- /dev/null
+++ b/drivers/video/fbdev/via/global.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#include "global.h"
+int viafb_platform_epia_dvi = STATE_OFF;
+int viafb_device_lcd_dualedge = STATE_OFF;
+int viafb_bus_width = 12;
+int viafb_display_hardware_layout = HW_LAYOUT_LCD_DVI;
+int viafb_DeviceStatus = CRT_Device;
+int viafb_hotplug;
+int viafb_refresh = 60;
+int viafb_refresh1 = 60;
+int viafb_lcd_dsp_method = LCD_EXPANDSION;
+int viafb_lcd_mode = LCD_OPENLDI;
+int viafb_CRT_ON = 1;
+int viafb_DVI_ON;
+int viafb_LCD_ON ;
+int viafb_LCD2_ON;
+int viafb_SAMM_ON;
+int viafb_dual_fb;
+unsigned int viafb_second_xres = 640;
+unsigned int viafb_second_yres = 480;
+int viafb_hotplug_Xres = 640;
+int viafb_hotplug_Yres = 480;
+int viafb_hotplug_bpp = 32;
+int viafb_hotplug_refresh = 60;
+int viafb_primary_dev = None_Device;
+int viafb_lcd_panel_id = LCD_PANEL_ID_MAXIMUM + 1;
+struct fb_info *viafbinfo;
+struct fb_info *viafbinfo1;
+struct viafb_par *viaparinfo;
+struct viafb_par *viaparinfo1;
+
diff --git a/drivers/video/fbdev/via/global.h b/drivers/video/fbdev/via/global.h
new file mode 100644
index 0000000000..e81e818a0e
--- /dev/null
+++ b/drivers/video/fbdev/via/global.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __GLOBAL_H__
+#define __GLOBAL_H__
+
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/console.h>
+#include <linux/timer.h>
+
+#ifdef CONFIG_X86
+#include <asm/olpc.h>
+#else
+#define machine_is_olpc(x) 0
+#endif
+
+#include "debug.h"
+
+#include "viafbdev.h"
+#include "chip.h"
+#include "accel.h"
+#include "share.h"
+#include "dvi.h"
+#include "viamode.h"
+#include "hw.h"
+
+#include "lcd.h"
+#include "ioctl.h"
+#include "via_utility.h"
+#include "vt1636.h"
+#include "tblDPASetting.h"
+
+/* External struct*/
+
+extern int viafb_platform_epia_dvi;
+extern int viafb_device_lcd_dualedge;
+extern int viafb_bus_width;
+extern int viafb_display_hardware_layout;
+extern struct offset offset_reg;
+extern struct viafb_par *viaparinfo;
+extern struct viafb_par *viaparinfo1;
+extern struct fb_info *viafbinfo;
+extern struct fb_info *viafbinfo1;
+extern int viafb_DeviceStatus;
+extern int viafb_refresh;
+extern int viafb_refresh1;
+extern int viafb_lcd_dsp_method;
+extern int viafb_lcd_mode;
+
+extern int viafb_CRT_ON;
+extern unsigned int viafb_second_xres;
+extern unsigned int viafb_second_yres;
+extern int viafb_hotplug_Xres;
+extern int viafb_hotplug_Yres;
+extern int viafb_hotplug_bpp;
+extern int viafb_hotplug_refresh;
+extern int viafb_primary_dev;
+
+extern int viafb_lcd_panel_id;
+
+#endif /* __GLOBAL_H__ */
diff --git a/drivers/video/fbdev/via/hw.c b/drivers/video/fbdev/via/hw.c
new file mode 100644
index 0000000000..66afd7be00
--- /dev/null
+++ b/drivers/video/fbdev/via/hw.c
@@ -0,0 +1,2119 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include <linux/via-core.h>
+#include "global.h"
+#include "via_clock.h"
+
+static struct pll_limit cle266_pll_limits[] = {
+	{19, 19, 4, 0},
+	{26, 102, 5, 0},
+	{53, 112, 6, 0},
+	{41, 100, 7, 0},
+	{83, 108, 8, 0},
+	{87, 118, 9, 0},
+	{95, 115, 12, 0},
+	{108, 108, 13, 0},
+	{83, 83, 17, 0},
+	{67, 98, 20, 0},
+	{121, 121, 24, 0},
+	{99, 99, 29, 0},
+	{33, 33, 3, 1},
+	{15, 23, 4, 1},
+	{37, 121, 5, 1},
+	{82, 82, 6, 1},
+	{31, 84, 7, 1},
+	{83, 83, 8, 1},
+	{76, 127, 9, 1},
+	{33, 121, 4, 2},
+	{91, 118, 5, 2},
+	{83, 109, 6, 2},
+	{90, 90, 7, 2},
+	{93, 93, 2, 3},
+	{53, 53, 3, 3},
+	{73, 117, 4, 3},
+	{101, 127, 5, 3},
+	{99, 99, 7, 3}
+};
+
+static struct pll_limit k800_pll_limits[] = {
+	{22, 22, 2, 0},
+	{28, 28, 3, 0},
+	{81, 112, 3, 1},
+	{86, 166, 4, 1},
+	{109, 153, 5, 1},
+	{66, 116, 3, 2},
+	{93, 137, 4, 2},
+	{117, 208, 5, 2},
+	{30, 30, 2, 3},
+	{69, 125, 3, 3},
+	{89, 161, 4, 3},
+	{121, 208, 5, 3},
+	{66, 66, 2, 4},
+	{85, 85, 3, 4},
+	{141, 161, 4, 4},
+	{177, 177, 5, 4}
+};
+
+static struct pll_limit cx700_pll_limits[] = {
+	{98, 98, 3, 1},
+	{86, 86, 4, 1},
+	{109, 208, 5, 1},
+	{68, 68, 2, 2},
+	{95, 116, 3, 2},
+	{93, 166, 4, 2},
+	{110, 206, 5, 2},
+	{174, 174, 7, 2},
+	{82, 109, 3, 3},
+	{117, 161, 4, 3},
+	{112, 208, 5, 3},
+	{141, 202, 5, 4}
+};
+
+static struct pll_limit vx855_pll_limits[] = {
+	{86, 86, 4, 1},
+	{108, 208, 5, 1},
+	{110, 208, 5, 2},
+	{83, 112, 3, 3},
+	{103, 161, 4, 3},
+	{112, 209, 5, 3},
+	{142, 161, 4, 4},
+	{141, 176, 5, 4}
+};
+
+/* according to VIA Technologies these values are based on experiment */
+static struct io_reg scaling_parameters[] = {
+	{VIACR, CR7A, 0xFF, 0x01},	/* LCD Scaling Parameter 1 */
+	{VIACR, CR7B, 0xFF, 0x02},	/* LCD Scaling Parameter 2 */
+	{VIACR, CR7C, 0xFF, 0x03},	/* LCD Scaling Parameter 3 */
+	{VIACR, CR7D, 0xFF, 0x04},	/* LCD Scaling Parameter 4 */
+	{VIACR, CR7E, 0xFF, 0x07},	/* LCD Scaling Parameter 5 */
+	{VIACR, CR7F, 0xFF, 0x0A},	/* LCD Scaling Parameter 6 */
+	{VIACR, CR80, 0xFF, 0x0D},	/* LCD Scaling Parameter 7 */
+	{VIACR, CR81, 0xFF, 0x13},	/* LCD Scaling Parameter 8 */
+	{VIACR, CR82, 0xFF, 0x16},	/* LCD Scaling Parameter 9 */
+	{VIACR, CR83, 0xFF, 0x19},	/* LCD Scaling Parameter 10 */
+	{VIACR, CR84, 0xFF, 0x1C},	/* LCD Scaling Parameter 11 */
+	{VIACR, CR85, 0xFF, 0x1D},	/* LCD Scaling Parameter 12 */
+	{VIACR, CR86, 0xFF, 0x1E},	/* LCD Scaling Parameter 13 */
+	{VIACR, CR87, 0xFF, 0x1F},	/* LCD Scaling Parameter 14 */
+};
+
+static struct io_reg common_vga[] = {
+	{VIACR, CR07, 0x10, 0x10}, /* [0] vertical total (bit 8)
+					[1] vertical display end (bit 8)
+					[2] vertical retrace start (bit 8)
+					[3] start vertical blanking (bit 8)
+					[4] line compare (bit 8)
+					[5] vertical total (bit 9)
+					[6] vertical display end (bit 9)
+					[7] vertical retrace start (bit 9) */
+	{VIACR, CR08, 0xFF, 0x00}, /* [0-4] preset row scan
+					[5-6] byte panning */
+	{VIACR, CR09, 0xDF, 0x40}, /* [0-4] max scan line
+					[5] start vertical blanking (bit 9)
+					[6] line compare (bit 9)
+					[7] scan doubling */
+	{VIACR, CR0A, 0xFF, 0x1E}, /* [0-4] cursor start
+					[5] cursor disable */
+	{VIACR, CR0B, 0xFF, 0x00}, /* [0-4] cursor end
+					[5-6] cursor skew */
+	{VIACR, CR0E, 0xFF, 0x00}, /* [0-7] cursor location (high) */
+	{VIACR, CR0F, 0xFF, 0x00}, /* [0-7] cursor location (low) */
+	{VIACR, CR11, 0xF0, 0x80}, /* [0-3] vertical retrace end
+					[6] memory refresh bandwidth
+					[7] CRTC register protect enable */
+	{VIACR, CR14, 0xFF, 0x00}, /* [0-4] underline location
+					[5] divide memory address clock by 4
+					[6] double word addressing */
+	{VIACR, CR17, 0xFF, 0x63}, /* [0-1] mapping of display address 13-14
+					[2] divide scan line clock by 2
+					[3] divide memory address clock by 2
+					[5] address wrap
+					[6] byte mode select
+					[7] sync enable */
+	{VIACR, CR18, 0xFF, 0xFF}, /* [0-7] line compare */
+};
+
+static struct fifo_depth_select display_fifo_depth_reg = {
+	/* IGA1 FIFO Depth_Select */
+	{IGA1_FIFO_DEPTH_SELECT_REG_NUM, {{SR17, 0, 7} } },
+	/* IGA2 FIFO Depth_Select */
+	{IGA2_FIFO_DEPTH_SELECT_REG_NUM,
+	 {{CR68, 4, 7}, {CR94, 7, 7}, {CR95, 7, 7} } }
+};
+
+static struct fifo_threshold_select fifo_threshold_select_reg = {
+	/* IGA1 FIFO Threshold Select */
+	{IGA1_FIFO_THRESHOLD_REG_NUM, {{SR16, 0, 5}, {SR16, 7, 7} } },
+	/* IGA2 FIFO Threshold Select */
+	{IGA2_FIFO_THRESHOLD_REG_NUM, {{CR68, 0, 3}, {CR95, 4, 6} } }
+};
+
+static struct fifo_high_threshold_select fifo_high_threshold_select_reg = {
+	/* IGA1 FIFO High Threshold Select */
+	{IGA1_FIFO_HIGH_THRESHOLD_REG_NUM, {{SR18, 0, 5}, {SR18, 7, 7} } },
+	/* IGA2 FIFO High Threshold Select */
+	{IGA2_FIFO_HIGH_THRESHOLD_REG_NUM, {{CR92, 0, 3}, {CR95, 0, 2} } }
+};
+
+static struct display_queue_expire_num display_queue_expire_num_reg = {
+	/* IGA1 Display Queue Expire Num */
+	{IGA1_DISPLAY_QUEUE_EXPIRE_NUM_REG_NUM, {{SR22, 0, 4} } },
+	/* IGA2 Display Queue Expire Num */
+	{IGA2_DISPLAY_QUEUE_EXPIRE_NUM_REG_NUM, {{CR94, 0, 6} } }
+};
+
+/* Definition Fetch Count Registers*/
+static struct fetch_count fetch_count_reg = {
+	/* IGA1 Fetch Count Register */
+	{IGA1_FETCH_COUNT_REG_NUM, {{SR1C, 0, 7}, {SR1D, 0, 1} } },
+	/* IGA2 Fetch Count Register */
+	{IGA2_FETCH_COUNT_REG_NUM, {{CR65, 0, 7}, {CR67, 2, 3} } }
+};
+
+static struct rgbLUT palLUT_table[] = {
+	/* {R,G,B} */
+	/* Index 0x00~0x03 */
+	{0x00, 0x00, 0x00}, {0x00, 0x00, 0x2A}, {0x00, 0x2A, 0x00}, {0x00,
+								     0x2A,
+								     0x2A},
+	/* Index 0x04~0x07 */
+	{0x2A, 0x00, 0x00}, {0x2A, 0x00, 0x2A}, {0x2A, 0x15, 0x00}, {0x2A,
+								     0x2A,
+								     0x2A},
+	/* Index 0x08~0x0B */
+	{0x15, 0x15, 0x15}, {0x15, 0x15, 0x3F}, {0x15, 0x3F, 0x15}, {0x15,
+								     0x3F,
+								     0x3F},
+	/* Index 0x0C~0x0F */
+	{0x3F, 0x15, 0x15}, {0x3F, 0x15, 0x3F}, {0x3F, 0x3F, 0x15}, {0x3F,
+								     0x3F,
+								     0x3F},
+	/* Index 0x10~0x13 */
+	{0x00, 0x00, 0x00}, {0x05, 0x05, 0x05}, {0x08, 0x08, 0x08}, {0x0B,
+								     0x0B,
+								     0x0B},
+	/* Index 0x14~0x17 */
+	{0x0E, 0x0E, 0x0E}, {0x11, 0x11, 0x11}, {0x14, 0x14, 0x14}, {0x18,
+								     0x18,
+								     0x18},
+	/* Index 0x18~0x1B */
+	{0x1C, 0x1C, 0x1C}, {0x20, 0x20, 0x20}, {0x24, 0x24, 0x24}, {0x28,
+								     0x28,
+								     0x28},
+	/* Index 0x1C~0x1F */
+	{0x2D, 0x2D, 0x2D}, {0x32, 0x32, 0x32}, {0x38, 0x38, 0x38}, {0x3F,
+								     0x3F,
+								     0x3F},
+	/* Index 0x20~0x23 */
+	{0x00, 0x00, 0x3F}, {0x10, 0x00, 0x3F}, {0x1F, 0x00, 0x3F}, {0x2F,
+								     0x00,
+								     0x3F},
+	/* Index 0x24~0x27 */
+	{0x3F, 0x00, 0x3F}, {0x3F, 0x00, 0x2F}, {0x3F, 0x00, 0x1F}, {0x3F,
+								     0x00,
+								     0x10},
+	/* Index 0x28~0x2B */
+	{0x3F, 0x00, 0x00}, {0x3F, 0x10, 0x00}, {0x3F, 0x1F, 0x00}, {0x3F,
+								     0x2F,
+								     0x00},
+	/* Index 0x2C~0x2F */
+	{0x3F, 0x3F, 0x00}, {0x2F, 0x3F, 0x00}, {0x1F, 0x3F, 0x00}, {0x10,
+								     0x3F,
+								     0x00},
+	/* Index 0x30~0x33 */
+	{0x00, 0x3F, 0x00}, {0x00, 0x3F, 0x10}, {0x00, 0x3F, 0x1F}, {0x00,
+								     0x3F,
+								     0x2F},
+	/* Index 0x34~0x37 */
+	{0x00, 0x3F, 0x3F}, {0x00, 0x2F, 0x3F}, {0x00, 0x1F, 0x3F}, {0x00,
+								     0x10,
+								     0x3F},
+	/* Index 0x38~0x3B */
+	{0x1F, 0x1F, 0x3F}, {0x27, 0x1F, 0x3F}, {0x2F, 0x1F, 0x3F}, {0x37,
+								     0x1F,
+								     0x3F},
+	/* Index 0x3C~0x3F */
+	{0x3F, 0x1F, 0x3F}, {0x3F, 0x1F, 0x37}, {0x3F, 0x1F, 0x2F}, {0x3F,
+								     0x1F,
+								     0x27},
+	/* Index 0x40~0x43 */
+	{0x3F, 0x1F, 0x1F}, {0x3F, 0x27, 0x1F}, {0x3F, 0x2F, 0x1F}, {0x3F,
+								     0x3F,
+								     0x1F},
+	/* Index 0x44~0x47 */
+	{0x3F, 0x3F, 0x1F}, {0x37, 0x3F, 0x1F}, {0x2F, 0x3F, 0x1F}, {0x27,
+								     0x3F,
+								     0x1F},
+	/* Index 0x48~0x4B */
+	{0x1F, 0x3F, 0x1F}, {0x1F, 0x3F, 0x27}, {0x1F, 0x3F, 0x2F}, {0x1F,
+								     0x3F,
+								     0x37},
+	/* Index 0x4C~0x4F */
+	{0x1F, 0x3F, 0x3F}, {0x1F, 0x37, 0x3F}, {0x1F, 0x2F, 0x3F}, {0x1F,
+								     0x27,
+								     0x3F},
+	/* Index 0x50~0x53 */
+	{0x2D, 0x2D, 0x3F}, {0x31, 0x2D, 0x3F}, {0x36, 0x2D, 0x3F}, {0x3A,
+								     0x2D,
+								     0x3F},
+	/* Index 0x54~0x57 */
+	{0x3F, 0x2D, 0x3F}, {0x3F, 0x2D, 0x3A}, {0x3F, 0x2D, 0x36}, {0x3F,
+								     0x2D,
+								     0x31},
+	/* Index 0x58~0x5B */
+	{0x3F, 0x2D, 0x2D}, {0x3F, 0x31, 0x2D}, {0x3F, 0x36, 0x2D}, {0x3F,
+								     0x3A,
+								     0x2D},
+	/* Index 0x5C~0x5F */
+	{0x3F, 0x3F, 0x2D}, {0x3A, 0x3F, 0x2D}, {0x36, 0x3F, 0x2D}, {0x31,
+								     0x3F,
+								     0x2D},
+	/* Index 0x60~0x63 */
+	{0x2D, 0x3F, 0x2D}, {0x2D, 0x3F, 0x31}, {0x2D, 0x3F, 0x36}, {0x2D,
+								     0x3F,
+								     0x3A},
+	/* Index 0x64~0x67 */
+	{0x2D, 0x3F, 0x3F}, {0x2D, 0x3A, 0x3F}, {0x2D, 0x36, 0x3F}, {0x2D,
+								     0x31,
+								     0x3F},
+	/* Index 0x68~0x6B */
+	{0x00, 0x00, 0x1C}, {0x07, 0x00, 0x1C}, {0x0E, 0x00, 0x1C}, {0x15,
+								     0x00,
+								     0x1C},
+	/* Index 0x6C~0x6F */
+	{0x1C, 0x00, 0x1C}, {0x1C, 0x00, 0x15}, {0x1C, 0x00, 0x0E}, {0x1C,
+								     0x00,
+								     0x07},
+	/* Index 0x70~0x73 */
+	{0x1C, 0x00, 0x00}, {0x1C, 0x07, 0x00}, {0x1C, 0x0E, 0x00}, {0x1C,
+								     0x15,
+								     0x00},
+	/* Index 0x74~0x77 */
+	{0x1C, 0x1C, 0x00}, {0x15, 0x1C, 0x00}, {0x0E, 0x1C, 0x00}, {0x07,
+								     0x1C,
+								     0x00},
+	/* Index 0x78~0x7B */
+	{0x00, 0x1C, 0x00}, {0x00, 0x1C, 0x07}, {0x00, 0x1C, 0x0E}, {0x00,
+								     0x1C,
+								     0x15},
+	/* Index 0x7C~0x7F */
+	{0x00, 0x1C, 0x1C}, {0x00, 0x15, 0x1C}, {0x00, 0x0E, 0x1C}, {0x00,
+								     0x07,
+								     0x1C},
+	/* Index 0x80~0x83 */
+	{0x0E, 0x0E, 0x1C}, {0x11, 0x0E, 0x1C}, {0x15, 0x0E, 0x1C}, {0x18,
+								     0x0E,
+								     0x1C},
+	/* Index 0x84~0x87 */
+	{0x1C, 0x0E, 0x1C}, {0x1C, 0x0E, 0x18}, {0x1C, 0x0E, 0x15}, {0x1C,
+								     0x0E,
+								     0x11},
+	/* Index 0x88~0x8B */
+	{0x1C, 0x0E, 0x0E}, {0x1C, 0x11, 0x0E}, {0x1C, 0x15, 0x0E}, {0x1C,
+								     0x18,
+								     0x0E},
+	/* Index 0x8C~0x8F */
+	{0x1C, 0x1C, 0x0E}, {0x18, 0x1C, 0x0E}, {0x15, 0x1C, 0x0E}, {0x11,
+								     0x1C,
+								     0x0E},
+	/* Index 0x90~0x93 */
+	{0x0E, 0x1C, 0x0E}, {0x0E, 0x1C, 0x11}, {0x0E, 0x1C, 0x15}, {0x0E,
+								     0x1C,
+								     0x18},
+	/* Index 0x94~0x97 */
+	{0x0E, 0x1C, 0x1C}, {0x0E, 0x18, 0x1C}, {0x0E, 0x15, 0x1C}, {0x0E,
+								     0x11,
+								     0x1C},
+	/* Index 0x98~0x9B */
+	{0x14, 0x14, 0x1C}, {0x16, 0x14, 0x1C}, {0x18, 0x14, 0x1C}, {0x1A,
+								     0x14,
+								     0x1C},
+	/* Index 0x9C~0x9F */
+	{0x1C, 0x14, 0x1C}, {0x1C, 0x14, 0x1A}, {0x1C, 0x14, 0x18}, {0x1C,
+								     0x14,
+								     0x16},
+	/* Index 0xA0~0xA3 */
+	{0x1C, 0x14, 0x14}, {0x1C, 0x16, 0x14}, {0x1C, 0x18, 0x14}, {0x1C,
+								     0x1A,
+								     0x14},
+	/* Index 0xA4~0xA7 */
+	{0x1C, 0x1C, 0x14}, {0x1A, 0x1C, 0x14}, {0x18, 0x1C, 0x14}, {0x16,
+								     0x1C,
+								     0x14},
+	/* Index 0xA8~0xAB */
+	{0x14, 0x1C, 0x14}, {0x14, 0x1C, 0x16}, {0x14, 0x1C, 0x18}, {0x14,
+								     0x1C,
+								     0x1A},
+	/* Index 0xAC~0xAF */
+	{0x14, 0x1C, 0x1C}, {0x14, 0x1A, 0x1C}, {0x14, 0x18, 0x1C}, {0x14,
+								     0x16,
+								     0x1C},
+	/* Index 0xB0~0xB3 */
+	{0x00, 0x00, 0x10}, {0x04, 0x00, 0x10}, {0x08, 0x00, 0x10}, {0x0C,
+								     0x00,
+								     0x10},
+	/* Index 0xB4~0xB7 */
+	{0x10, 0x00, 0x10}, {0x10, 0x00, 0x0C}, {0x10, 0x00, 0x08}, {0x10,
+								     0x00,
+								     0x04},
+	/* Index 0xB8~0xBB */
+	{0x10, 0x00, 0x00}, {0x10, 0x04, 0x00}, {0x10, 0x08, 0x00}, {0x10,
+								     0x0C,
+								     0x00},
+	/* Index 0xBC~0xBF */
+	{0x10, 0x10, 0x00}, {0x0C, 0x10, 0x00}, {0x08, 0x10, 0x00}, {0x04,
+								     0x10,
+								     0x00},
+	/* Index 0xC0~0xC3 */
+	{0x00, 0x10, 0x00}, {0x00, 0x10, 0x04}, {0x00, 0x10, 0x08}, {0x00,
+								     0x10,
+								     0x0C},
+	/* Index 0xC4~0xC7 */
+	{0x00, 0x10, 0x10}, {0x00, 0x0C, 0x10}, {0x00, 0x08, 0x10}, {0x00,
+								     0x04,
+								     0x10},
+	/* Index 0xC8~0xCB */
+	{0x08, 0x08, 0x10}, {0x0A, 0x08, 0x10}, {0x0C, 0x08, 0x10}, {0x0E,
+								     0x08,
+								     0x10},
+	/* Index 0xCC~0xCF */
+	{0x10, 0x08, 0x10}, {0x10, 0x08, 0x0E}, {0x10, 0x08, 0x0C}, {0x10,
+								     0x08,
+								     0x0A},
+	/* Index 0xD0~0xD3 */
+	{0x10, 0x08, 0x08}, {0x10, 0x0A, 0x08}, {0x10, 0x0C, 0x08}, {0x10,
+								     0x0E,
+								     0x08},
+	/* Index 0xD4~0xD7 */
+	{0x10, 0x10, 0x08}, {0x0E, 0x10, 0x08}, {0x0C, 0x10, 0x08}, {0x0A,
+								     0x10,
+								     0x08},
+	/* Index 0xD8~0xDB */
+	{0x08, 0x10, 0x08}, {0x08, 0x10, 0x0A}, {0x08, 0x10, 0x0C}, {0x08,
+								     0x10,
+								     0x0E},
+	/* Index 0xDC~0xDF */
+	{0x08, 0x10, 0x10}, {0x08, 0x0E, 0x10}, {0x08, 0x0C, 0x10}, {0x08,
+								     0x0A,
+								     0x10},
+	/* Index 0xE0~0xE3 */
+	{0x0B, 0x0B, 0x10}, {0x0C, 0x0B, 0x10}, {0x0D, 0x0B, 0x10}, {0x0F,
+								     0x0B,
+								     0x10},
+	/* Index 0xE4~0xE7 */
+	{0x10, 0x0B, 0x10}, {0x10, 0x0B, 0x0F}, {0x10, 0x0B, 0x0D}, {0x10,
+								     0x0B,
+								     0x0C},
+	/* Index 0xE8~0xEB */
+	{0x10, 0x0B, 0x0B}, {0x10, 0x0C, 0x0B}, {0x10, 0x0D, 0x0B}, {0x10,
+								     0x0F,
+								     0x0B},
+	/* Index 0xEC~0xEF */
+	{0x10, 0x10, 0x0B}, {0x0F, 0x10, 0x0B}, {0x0D, 0x10, 0x0B}, {0x0C,
+								     0x10,
+								     0x0B},
+	/* Index 0xF0~0xF3 */
+	{0x0B, 0x10, 0x0B}, {0x0B, 0x10, 0x0C}, {0x0B, 0x10, 0x0D}, {0x0B,
+								     0x10,
+								     0x0F},
+	/* Index 0xF4~0xF7 */
+	{0x0B, 0x10, 0x10}, {0x0B, 0x0F, 0x10}, {0x0B, 0x0D, 0x10}, {0x0B,
+								     0x0C,
+								     0x10},
+	/* Index 0xF8~0xFB */
+	{0x00, 0x00, 0x00}, {0x00, 0x00, 0x00}, {0x00, 0x00, 0x00}, {0x00,
+								     0x00,
+								     0x00},
+	/* Index 0xFC~0xFF */
+	{0x00, 0x00, 0x00}, {0x00, 0x00, 0x00}, {0x00, 0x00, 0x00}, {0x00,
+								     0x00,
+								     0x00}
+};
+
+static struct via_device_mapping device_mapping[] = {
+	{VIA_LDVP0, "LDVP0"},
+	{VIA_LDVP1, "LDVP1"},
+	{VIA_DVP0, "DVP0"},
+	{VIA_CRT, "CRT"},
+	{VIA_DVP1, "DVP1"},
+	{VIA_LVDS1, "LVDS1"},
+	{VIA_LVDS2, "LVDS2"}
+};
+
+/* structure with function pointers to support clock control */
+static struct via_clock clock;
+
+static void load_fix_bit_crtc_reg(void);
+static void init_gfx_chip_info(int chip_type);
+static void init_tmds_chip_info(void);
+static void init_lvds_chip_info(void);
+static void device_screen_off(void);
+static void device_screen_on(void);
+static void set_display_channel(void);
+static void device_off(void);
+static void device_on(void);
+static void enable_second_display_channel(void);
+static void disable_second_display_channel(void);
+
+void viafb_lock_crt(void)
+{
+	viafb_write_reg_mask(CR11, VIACR, BIT7, BIT7);
+}
+
+void viafb_unlock_crt(void)
+{
+	viafb_write_reg_mask(CR11, VIACR, 0, BIT7);
+	viafb_write_reg_mask(CR47, VIACR, 0, BIT0);
+}
+
+static void write_dac_reg(u8 index, u8 r, u8 g, u8 b)
+{
+	outb(index, LUT_INDEX_WRITE);
+	outb(r, LUT_DATA);
+	outb(g, LUT_DATA);
+	outb(b, LUT_DATA);
+}
+
+static u32 get_dvi_devices(int output_interface)
+{
+	switch (output_interface) {
+	case INTERFACE_DVP0:
+		return VIA_DVP0 | VIA_LDVP0;
+
+	case INTERFACE_DVP1:
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			return VIA_LDVP1;
+		else
+			return VIA_DVP1;
+
+	case INTERFACE_DFP_HIGH:
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			return 0;
+		else
+			return VIA_LVDS2 | VIA_DVP0;
+
+	case INTERFACE_DFP_LOW:
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+			return 0;
+		else
+			return VIA_DVP1 | VIA_LVDS1;
+
+	case INTERFACE_TMDS:
+		return VIA_LVDS1;
+	}
+
+	return 0;
+}
+
+static u32 get_lcd_devices(int output_interface)
+{
+	switch (output_interface) {
+	case INTERFACE_DVP0:
+		return VIA_DVP0;
+
+	case INTERFACE_DVP1:
+		return VIA_DVP1;
+
+	case INTERFACE_DFP_HIGH:
+		return VIA_LVDS2 | VIA_DVP0;
+
+	case INTERFACE_DFP_LOW:
+		return VIA_LVDS1 | VIA_DVP1;
+
+	case INTERFACE_DFP:
+		return VIA_LVDS1 | VIA_LVDS2;
+
+	case INTERFACE_LVDS0:
+	case INTERFACE_LVDS0LVDS1:
+		return VIA_LVDS1;
+
+	case INTERFACE_LVDS1:
+		return VIA_LVDS2;
+	}
+
+	return 0;
+}
+
+/*Set IGA path for each device*/
+void viafb_set_iga_path(void)
+{
+	int crt_iga_path = 0;
+
+	if (viafb_SAMM_ON == 1) {
+		if (viafb_CRT_ON) {
+			if (viafb_primary_dev == CRT_Device)
+				crt_iga_path = IGA1;
+			else
+				crt_iga_path = IGA2;
+		}
+
+		if (viafb_DVI_ON) {
+			if (viafb_primary_dev == DVI_Device)
+				viaparinfo->tmds_setting_info->iga_path = IGA1;
+			else
+				viaparinfo->tmds_setting_info->iga_path = IGA2;
+		}
+
+		if (viafb_LCD_ON) {
+			if (viafb_primary_dev == LCD_Device) {
+				if (viafb_dual_fb &&
+					(viaparinfo->chip_info->gfx_chip_name ==
+					UNICHROME_CLE266)) {
+					viaparinfo->
+					lvds_setting_info->iga_path = IGA2;
+					crt_iga_path = IGA1;
+					viaparinfo->
+					tmds_setting_info->iga_path = IGA1;
+				} else
+					viaparinfo->
+					lvds_setting_info->iga_path = IGA1;
+			} else {
+				viaparinfo->lvds_setting_info->iga_path = IGA2;
+			}
+		}
+		if (viafb_LCD2_ON) {
+			if (LCD2_Device == viafb_primary_dev)
+				viaparinfo->lvds_setting_info2->iga_path = IGA1;
+			else
+				viaparinfo->lvds_setting_info2->iga_path = IGA2;
+		}
+	} else {
+		viafb_SAMM_ON = 0;
+
+		if (viafb_CRT_ON && viafb_LCD_ON) {
+			crt_iga_path = IGA1;
+			viaparinfo->lvds_setting_info->iga_path = IGA2;
+		} else if (viafb_CRT_ON && viafb_DVI_ON) {
+			crt_iga_path = IGA1;
+			viaparinfo->tmds_setting_info->iga_path = IGA2;
+		} else if (viafb_LCD_ON && viafb_DVI_ON) {
+			viaparinfo->tmds_setting_info->iga_path = IGA1;
+			viaparinfo->lvds_setting_info->iga_path = IGA2;
+		} else if (viafb_LCD_ON && viafb_LCD2_ON) {
+			viaparinfo->lvds_setting_info->iga_path = IGA2;
+			viaparinfo->lvds_setting_info2->iga_path = IGA2;
+		} else if (viafb_CRT_ON) {
+			crt_iga_path = IGA1;
+		} else if (viafb_LCD_ON) {
+			viaparinfo->lvds_setting_info->iga_path = IGA2;
+		} else if (viafb_DVI_ON) {
+			viaparinfo->tmds_setting_info->iga_path = IGA1;
+		}
+	}
+
+	viaparinfo->shared->iga1_devices = 0;
+	viaparinfo->shared->iga2_devices = 0;
+	if (viafb_CRT_ON) {
+		if (crt_iga_path == IGA1)
+			viaparinfo->shared->iga1_devices |= VIA_CRT;
+		else
+			viaparinfo->shared->iga2_devices |= VIA_CRT;
+	}
+
+	if (viafb_DVI_ON) {
+		if (viaparinfo->tmds_setting_info->iga_path == IGA1)
+			viaparinfo->shared->iga1_devices |= get_dvi_devices(
+				viaparinfo->chip_info->
+				tmds_chip_info.output_interface);
+		else
+			viaparinfo->shared->iga2_devices |= get_dvi_devices(
+				viaparinfo->chip_info->
+				tmds_chip_info.output_interface);
+	}
+
+	if (viafb_LCD_ON) {
+		if (viaparinfo->lvds_setting_info->iga_path == IGA1)
+			viaparinfo->shared->iga1_devices |= get_lcd_devices(
+				viaparinfo->chip_info->
+				lvds_chip_info.output_interface);
+		else
+			viaparinfo->shared->iga2_devices |= get_lcd_devices(
+				viaparinfo->chip_info->
+				lvds_chip_info.output_interface);
+	}
+
+	if (viafb_LCD2_ON) {
+		if (viaparinfo->lvds_setting_info2->iga_path == IGA1)
+			viaparinfo->shared->iga1_devices |= get_lcd_devices(
+				viaparinfo->chip_info->
+				lvds_chip_info2.output_interface);
+		else
+			viaparinfo->shared->iga2_devices |= get_lcd_devices(
+				viaparinfo->chip_info->
+				lvds_chip_info2.output_interface);
+	}
+
+	/* looks like the OLPC has its display wired to DVP1 and LVDS2 */
+	if (machine_is_olpc())
+		viaparinfo->shared->iga2_devices = VIA_DVP1 | VIA_LVDS2;
+}
+
+static void set_color_register(u8 index, u8 red, u8 green, u8 blue)
+{
+	outb(0xFF, 0x3C6); /* bit mask of palette */
+	outb(index, 0x3C8);
+	outb(red, 0x3C9);
+	outb(green, 0x3C9);
+	outb(blue, 0x3C9);
+}
+
+void viafb_set_primary_color_register(u8 index, u8 red, u8 green, u8 blue)
+{
+	viafb_write_reg_mask(0x1A, VIASR, 0x00, 0x01);
+	set_color_register(index, red, green, blue);
+}
+
+void viafb_set_secondary_color_register(u8 index, u8 red, u8 green, u8 blue)
+{
+	viafb_write_reg_mask(0x1A, VIASR, 0x01, 0x01);
+	set_color_register(index, red, green, blue);
+}
+
+static void set_source_common(u8 index, u8 offset, u8 iga)
+{
+	u8 value, mask = 1 << offset;
+
+	switch (iga) {
+	case IGA1:
+		value = 0x00;
+		break;
+	case IGA2:
+		value = mask;
+		break;
+	default:
+		printk(KERN_WARNING "viafb: Unsupported source: %d\n", iga);
+		return;
+	}
+
+	via_write_reg_mask(VIACR, index, value, mask);
+}
+
+static void set_crt_source(u8 iga)
+{
+	u8 value;
+
+	switch (iga) {
+	case IGA1:
+		value = 0x00;
+		break;
+	case IGA2:
+		value = 0x40;
+		break;
+	default:
+		printk(KERN_WARNING "viafb: Unsupported source: %d\n", iga);
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x16, value, 0x40);
+}
+
+static inline void set_ldvp0_source(u8 iga)
+{
+	set_source_common(0x6C, 7, iga);
+}
+
+static inline void set_ldvp1_source(u8 iga)
+{
+	set_source_common(0x93, 7, iga);
+}
+
+static inline void set_dvp0_source(u8 iga)
+{
+	set_source_common(0x96, 4, iga);
+}
+
+static inline void set_dvp1_source(u8 iga)
+{
+	set_source_common(0x9B, 4, iga);
+}
+
+static inline void set_lvds1_source(u8 iga)
+{
+	set_source_common(0x99, 4, iga);
+}
+
+static inline void set_lvds2_source(u8 iga)
+{
+	set_source_common(0x97, 4, iga);
+}
+
+void via_set_source(u32 devices, u8 iga)
+{
+	if (devices & VIA_LDVP0)
+		set_ldvp0_source(iga);
+	if (devices & VIA_LDVP1)
+		set_ldvp1_source(iga);
+	if (devices & VIA_DVP0)
+		set_dvp0_source(iga);
+	if (devices & VIA_CRT)
+		set_crt_source(iga);
+	if (devices & VIA_DVP1)
+		set_dvp1_source(iga);
+	if (devices & VIA_LVDS1)
+		set_lvds1_source(iga);
+	if (devices & VIA_LVDS2)
+		set_lvds2_source(iga);
+}
+
+static void set_crt_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x00;
+		break;
+	case VIA_STATE_STANDBY:
+		value = 0x10;
+		break;
+	case VIA_STATE_SUSPEND:
+		value = 0x20;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x30;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIACR, 0x36, value, 0x30);
+}
+
+static void set_dvp0_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0xC0;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x1E, value, 0xC0);
+}
+
+static void set_dvp1_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x30;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x1E, value, 0x30);
+}
+
+static void set_lvds1_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x03;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2A, value, 0x03);
+}
+
+static void set_lvds2_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x0C;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2A, value, 0x0C);
+}
+
+void via_set_state(u32 devices, u8 state)
+{
+	/*
+	TODO: Can we enable/disable these devices? How?
+	if (devices & VIA_LDVP0)
+	if (devices & VIA_LDVP1)
+	*/
+	if (devices & VIA_DVP0)
+		set_dvp0_state(state);
+	if (devices & VIA_CRT)
+		set_crt_state(state);
+	if (devices & VIA_DVP1)
+		set_dvp1_state(state);
+	if (devices & VIA_LVDS1)
+		set_lvds1_state(state);
+	if (devices & VIA_LVDS2)
+		set_lvds2_state(state);
+}
+
+void via_set_sync_polarity(u32 devices, u8 polarity)
+{
+	if (polarity & ~(VIA_HSYNC_NEGATIVE | VIA_VSYNC_NEGATIVE)) {
+		printk(KERN_WARNING "viafb: Unsupported polarity: %d\n",
+			polarity);
+		return;
+	}
+
+	if (devices & VIA_CRT)
+		via_write_misc_reg_mask(polarity << 6, 0xC0);
+	if (devices & VIA_DVP1)
+		via_write_reg_mask(VIACR, 0x9B, polarity << 5, 0x60);
+	if (devices & VIA_LVDS1)
+		via_write_reg_mask(VIACR, 0x99, polarity << 5, 0x60);
+	if (devices & VIA_LVDS2)
+		via_write_reg_mask(VIACR, 0x97, polarity << 5, 0x60);
+}
+
+u32 via_parse_odev(char *input, char **end)
+{
+	char *ptr = input;
+	u32 odev = 0;
+	bool next = true;
+	int i, len;
+
+	while (next) {
+		next = false;
+		for (i = 0; i < ARRAY_SIZE(device_mapping); i++) {
+			len = strlen(device_mapping[i].name);
+			if (!strncmp(ptr, device_mapping[i].name, len)) {
+				odev |= device_mapping[i].device;
+				ptr += len;
+				if (*ptr == ',') {
+					ptr++;
+					next = true;
+				}
+			}
+		}
+	}
+
+	*end = ptr;
+	return odev;
+}
+
+void via_odev_to_seq(struct seq_file *m, u32 odev)
+{
+	int i, count = 0;
+
+	for (i = 0; i < ARRAY_SIZE(device_mapping); i++) {
+		if (odev & device_mapping[i].device) {
+			if (count > 0)
+				seq_putc(m, ',');
+
+			seq_puts(m, device_mapping[i].name);
+			count++;
+		}
+	}
+
+	seq_putc(m, '\n');
+}
+
+static void load_fix_bit_crtc_reg(void)
+{
+	viafb_unlock_crt();
+
+	/* always set to 1 */
+	viafb_write_reg_mask(CR03, VIACR, 0x80, BIT7);
+	/* line compare should set all bits = 1 (extend modes) */
+	viafb_write_reg_mask(CR35, VIACR, 0x10, BIT4);
+	/* line compare should set all bits = 1 (extend modes) */
+	viafb_write_reg_mask(CR33, VIACR, 0x06, BIT0 + BIT1 + BIT2);
+	/*viafb_write_reg_mask(CR32, VIACR, 0x01, BIT0); */
+
+	viafb_lock_crt();
+
+	/* If K8M800, enable Prefetch Mode. */
+	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800)
+		|| (viaparinfo->chip_info->gfx_chip_name == UNICHROME_K8M890))
+		viafb_write_reg_mask(CR33, VIACR, 0x08, BIT3);
+	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
+	    && (viaparinfo->chip_info->gfx_chip_revision == CLE266_REVISION_AX))
+		viafb_write_reg_mask(SR1A, VIASR, 0x02, BIT1);
+
+}
+
+void viafb_load_reg(int timing_value, int viafb_load_reg_num,
+	struct io_register *reg,
+	      int io_type)
+{
+	int reg_mask;
+	int bit_num = 0;
+	int data;
+	int i, j;
+	int shift_next_reg;
+	int start_index, end_index, cr_index;
+	u16 get_bit;
+
+	for (i = 0; i < viafb_load_reg_num; i++) {
+		reg_mask = 0;
+		data = 0;
+		start_index = reg[i].start_bit;
+		end_index = reg[i].end_bit;
+		cr_index = reg[i].io_addr;
+
+		shift_next_reg = bit_num;
+		for (j = start_index; j <= end_index; j++) {
+			/*if (bit_num==8) timing_value = timing_value >>8; */
+			reg_mask = reg_mask | (BIT0 << j);
+			get_bit = (timing_value & (BIT0 << bit_num));
+			data =
+			    data | ((get_bit >> shift_next_reg) << start_index);
+			bit_num++;
+		}
+		if (io_type == VIACR)
+			viafb_write_reg_mask(cr_index, VIACR, data, reg_mask);
+		else
+			viafb_write_reg_mask(cr_index, VIASR, data, reg_mask);
+	}
+
+}
+
+/* Write Registers */
+void viafb_write_regx(struct io_reg RegTable[], int ItemNum)
+{
+	int i;
+
+	/*DEBUG_MSG(KERN_INFO "Table Size : %x!!\n",ItemNum ); */
+
+	for (i = 0; i < ItemNum; i++)
+		via_write_reg_mask(RegTable[i].port, RegTable[i].index,
+			RegTable[i].value, RegTable[i].mask);
+}
+
+void viafb_load_fetch_count_reg(int h_addr, int bpp_byte, int set_iga)
+{
+	int reg_value;
+	int viafb_load_reg_num;
+	struct io_register *reg = NULL;
+
+	switch (set_iga) {
+	case IGA1:
+		reg_value = IGA1_FETCH_COUNT_FORMULA(h_addr, bpp_byte);
+		viafb_load_reg_num = fetch_count_reg.
+			iga1_fetch_count_reg.reg_num;
+		reg = fetch_count_reg.iga1_fetch_count_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIASR);
+		break;
+	case IGA2:
+		reg_value = IGA2_FETCH_COUNT_FORMULA(h_addr, bpp_byte);
+		viafb_load_reg_num = fetch_count_reg.
+			iga2_fetch_count_reg.reg_num;
+		reg = fetch_count_reg.iga2_fetch_count_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIACR);
+		break;
+	}
+
+}
+
+void viafb_load_FIFO_reg(int set_iga, int hor_active, int ver_active)
+{
+	int reg_value;
+	int viafb_load_reg_num;
+	struct io_register *reg = NULL;
+	int iga1_fifo_max_depth = 0, iga1_fifo_threshold =
+	    0, iga1_fifo_high_threshold = 0, iga1_display_queue_expire_num = 0;
+	int iga2_fifo_max_depth = 0, iga2_fifo_threshold =
+	    0, iga2_fifo_high_threshold = 0, iga2_display_queue_expire_num = 0;
+
+	if (set_iga == IGA1) {
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800) {
+			iga1_fifo_max_depth = K800_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = K800_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    K800_IGA1_FIFO_HIGH_THRESHOLD;
+			/* If resolution > 1280x1024, expire length = 64, else
+			   expire length = 128 */
+			if ((hor_active > 1280) && (ver_active > 1024))
+				iga1_display_queue_expire_num = 16;
+			else
+				iga1_display_queue_expire_num =
+				    K800_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_PM800) {
+			iga1_fifo_max_depth = P880_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = P880_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    P880_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    P880_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+
+			/* If resolution > 1280x1024, expire length = 64, else
+			   expire length = 128 */
+			if ((hor_active > 1280) && (ver_active > 1024))
+				iga1_display_queue_expire_num = 16;
+			else
+				iga1_display_queue_expire_num =
+				    P880_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CN700) {
+			iga1_fifo_max_depth = CN700_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = CN700_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    CN700_IGA1_FIFO_HIGH_THRESHOLD;
+
+			/* If resolution > 1280x1024, expire length = 64,
+			   else expire length = 128 */
+			if ((hor_active > 1280) && (ver_active > 1024))
+				iga1_display_queue_expire_num = 16;
+			else
+				iga1_display_queue_expire_num =
+				    CN700_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
+			iga1_fifo_max_depth = CX700_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = CX700_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    CX700_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    CX700_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_K8M890) {
+			iga1_fifo_max_depth = K8M890_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = K8M890_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    K8M890_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    K8M890_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_P4M890) {
+			iga1_fifo_max_depth = P4M890_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = P4M890_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    P4M890_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    P4M890_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_P4M900) {
+			iga1_fifo_max_depth = P4M900_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = P4M900_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    P4M900_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    P4M900_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_VX800) {
+			iga1_fifo_max_depth = VX800_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = VX800_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    VX800_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    VX800_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_VX855) {
+			iga1_fifo_max_depth = VX855_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = VX855_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    VX855_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    VX855_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_VX900) {
+			iga1_fifo_max_depth = VX900_IGA1_FIFO_MAX_DEPTH;
+			iga1_fifo_threshold = VX900_IGA1_FIFO_THRESHOLD;
+			iga1_fifo_high_threshold =
+			    VX900_IGA1_FIFO_HIGH_THRESHOLD;
+			iga1_display_queue_expire_num =
+			    VX900_IGA1_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		/* Set Display FIFO Depath Select */
+		reg_value = IGA1_FIFO_DEPTH_SELECT_FORMULA(iga1_fifo_max_depth);
+		viafb_load_reg_num =
+		    display_fifo_depth_reg.iga1_fifo_depth_select_reg.reg_num;
+		reg = display_fifo_depth_reg.iga1_fifo_depth_select_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIASR);
+
+		/* Set Display FIFO Threshold Select */
+		reg_value = IGA1_FIFO_THRESHOLD_FORMULA(iga1_fifo_threshold);
+		viafb_load_reg_num =
+		    fifo_threshold_select_reg.
+		    iga1_fifo_threshold_select_reg.reg_num;
+		reg =
+		    fifo_threshold_select_reg.
+		    iga1_fifo_threshold_select_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIASR);
+
+		/* Set FIFO High Threshold Select */
+		reg_value =
+		    IGA1_FIFO_HIGH_THRESHOLD_FORMULA(iga1_fifo_high_threshold);
+		viafb_load_reg_num =
+		    fifo_high_threshold_select_reg.
+		    iga1_fifo_high_threshold_select_reg.reg_num;
+		reg =
+		    fifo_high_threshold_select_reg.
+		    iga1_fifo_high_threshold_select_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIASR);
+
+		/* Set Display Queue Expire Num */
+		reg_value =
+		    IGA1_DISPLAY_QUEUE_EXPIRE_NUM_FORMULA
+		    (iga1_display_queue_expire_num);
+		viafb_load_reg_num =
+		    display_queue_expire_num_reg.
+		    iga1_display_queue_expire_num_reg.reg_num;
+		reg =
+		    display_queue_expire_num_reg.
+		    iga1_display_queue_expire_num_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIASR);
+
+	} else {
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800) {
+			iga2_fifo_max_depth = K800_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = K800_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    K800_IGA2_FIFO_HIGH_THRESHOLD;
+
+			/* If resolution > 1280x1024, expire length = 64,
+			   else  expire length = 128 */
+			if ((hor_active > 1280) && (ver_active > 1024))
+				iga2_display_queue_expire_num = 16;
+			else
+				iga2_display_queue_expire_num =
+				    K800_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_PM800) {
+			iga2_fifo_max_depth = P880_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = P880_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    P880_IGA2_FIFO_HIGH_THRESHOLD;
+
+			/* If resolution > 1280x1024, expire length = 64,
+			   else  expire length = 128 */
+			if ((hor_active > 1280) && (ver_active > 1024))
+				iga2_display_queue_expire_num = 16;
+			else
+				iga2_display_queue_expire_num =
+				    P880_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CN700) {
+			iga2_fifo_max_depth = CN700_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = CN700_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    CN700_IGA2_FIFO_HIGH_THRESHOLD;
+
+			/* If resolution > 1280x1024, expire length = 64,
+			   else expire length = 128 */
+			if ((hor_active > 1280) && (ver_active > 1024))
+				iga2_display_queue_expire_num = 16;
+			else
+				iga2_display_queue_expire_num =
+				    CN700_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
+			iga2_fifo_max_depth = CX700_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = CX700_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    CX700_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    CX700_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_K8M890) {
+			iga2_fifo_max_depth = K8M890_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = K8M890_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    K8M890_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    K8M890_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_P4M890) {
+			iga2_fifo_max_depth = P4M890_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = P4M890_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    P4M890_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    P4M890_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_P4M900) {
+			iga2_fifo_max_depth = P4M900_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = P4M900_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    P4M900_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    P4M900_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_VX800) {
+			iga2_fifo_max_depth = VX800_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = VX800_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    VX800_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    VX800_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_VX855) {
+			iga2_fifo_max_depth = VX855_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = VX855_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    VX855_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    VX855_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_VX900) {
+			iga2_fifo_max_depth = VX900_IGA2_FIFO_MAX_DEPTH;
+			iga2_fifo_threshold = VX900_IGA2_FIFO_THRESHOLD;
+			iga2_fifo_high_threshold =
+			    VX900_IGA2_FIFO_HIGH_THRESHOLD;
+			iga2_display_queue_expire_num =
+			    VX900_IGA2_DISPLAY_QUEUE_EXPIRE_NUM;
+		}
+
+		if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800) {
+			/* Set Display FIFO Depath Select */
+			reg_value =
+			    IGA2_FIFO_DEPTH_SELECT_FORMULA(iga2_fifo_max_depth)
+			    - 1;
+			/* Patch LCD in IGA2 case */
+			viafb_load_reg_num =
+			    display_fifo_depth_reg.
+			    iga2_fifo_depth_select_reg.reg_num;
+			reg =
+			    display_fifo_depth_reg.
+			    iga2_fifo_depth_select_reg.reg;
+			viafb_load_reg(reg_value,
+				viafb_load_reg_num, reg, VIACR);
+		} else {
+
+			/* Set Display FIFO Depath Select */
+			reg_value =
+			    IGA2_FIFO_DEPTH_SELECT_FORMULA(iga2_fifo_max_depth);
+			viafb_load_reg_num =
+			    display_fifo_depth_reg.
+			    iga2_fifo_depth_select_reg.reg_num;
+			reg =
+			    display_fifo_depth_reg.
+			    iga2_fifo_depth_select_reg.reg;
+			viafb_load_reg(reg_value,
+				viafb_load_reg_num, reg, VIACR);
+		}
+
+		/* Set Display FIFO Threshold Select */
+		reg_value = IGA2_FIFO_THRESHOLD_FORMULA(iga2_fifo_threshold);
+		viafb_load_reg_num =
+		    fifo_threshold_select_reg.
+		    iga2_fifo_threshold_select_reg.reg_num;
+		reg =
+		    fifo_threshold_select_reg.
+		    iga2_fifo_threshold_select_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIACR);
+
+		/* Set FIFO High Threshold Select */
+		reg_value =
+		    IGA2_FIFO_HIGH_THRESHOLD_FORMULA(iga2_fifo_high_threshold);
+		viafb_load_reg_num =
+		    fifo_high_threshold_select_reg.
+		    iga2_fifo_high_threshold_select_reg.reg_num;
+		reg =
+		    fifo_high_threshold_select_reg.
+		    iga2_fifo_high_threshold_select_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIACR);
+
+		/* Set Display Queue Expire Num */
+		reg_value =
+		    IGA2_DISPLAY_QUEUE_EXPIRE_NUM_FORMULA
+		    (iga2_display_queue_expire_num);
+		viafb_load_reg_num =
+		    display_queue_expire_num_reg.
+		    iga2_display_queue_expire_num_reg.reg_num;
+		reg =
+		    display_queue_expire_num_reg.
+		    iga2_display_queue_expire_num_reg.reg;
+		viafb_load_reg(reg_value, viafb_load_reg_num, reg, VIACR);
+
+	}
+
+}
+
+static struct via_pll_config get_pll_config(struct pll_limit *limits, int size,
+	int clk)
+{
+	struct via_pll_config cur, up, down, best = {0, 1, 0};
+	const u32 f0 = 14318180; /* X1 frequency */
+	int i, f;
+
+	for (i = 0; i < size; i++) {
+		cur.rshift = limits[i].rshift;
+		cur.divisor = limits[i].divisor;
+		cur.multiplier = clk / ((f0 / cur.divisor)>>cur.rshift);
+		f = abs(get_pll_output_frequency(f0, cur) - clk);
+		up = down = cur;
+		up.multiplier++;
+		down.multiplier--;
+		if (abs(get_pll_output_frequency(f0, up) - clk) < f)
+			cur = up;
+		else if (abs(get_pll_output_frequency(f0, down) - clk) < f)
+			cur = down;
+
+		if (cur.multiplier < limits[i].multiplier_min)
+			cur.multiplier = limits[i].multiplier_min;
+		else if (cur.multiplier > limits[i].multiplier_max)
+			cur.multiplier = limits[i].multiplier_max;
+
+		f = abs(get_pll_output_frequency(f0, cur) - clk);
+		if (f < abs(get_pll_output_frequency(f0, best) - clk))
+			best = cur;
+	}
+
+	return best;
+}
+
+static struct via_pll_config get_best_pll_config(int clk)
+{
+	struct via_pll_config config;
+
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+		config = get_pll_config(cle266_pll_limits,
+			ARRAY_SIZE(cle266_pll_limits), clk);
+		break;
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+		config = get_pll_config(k800_pll_limits,
+			ARRAY_SIZE(k800_pll_limits), clk);
+		break;
+	case UNICHROME_CX700:
+	case UNICHROME_CN750:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+	case UNICHROME_VX800:
+		config = get_pll_config(cx700_pll_limits,
+			ARRAY_SIZE(cx700_pll_limits), clk);
+		break;
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		config = get_pll_config(vx855_pll_limits,
+			ARRAY_SIZE(vx855_pll_limits), clk);
+		break;
+	}
+
+	return config;
+}
+
+/* Set VCLK*/
+void viafb_set_vclock(u32 clk, int set_iga)
+{
+	struct via_pll_config config = get_best_pll_config(clk);
+
+	if (set_iga == IGA1)
+		clock.set_primary_pll(config);
+	if (set_iga == IGA2)
+		clock.set_secondary_pll(config);
+
+	/* Fire! */
+	via_write_misc_reg_mask(0x0C, 0x0C); /* select external clock */
+}
+
+struct via_display_timing var_to_timing(const struct fb_var_screeninfo *var,
+	u16 cxres, u16 cyres)
+{
+	struct via_display_timing timing;
+	u16 dx = (var->xres - cxres) / 2, dy = (var->yres - cyres) / 2;
+
+	timing.hor_addr = cxres;
+	timing.hor_sync_start = timing.hor_addr + var->right_margin + dx;
+	timing.hor_sync_end = timing.hor_sync_start + var->hsync_len;
+	timing.hor_total = timing.hor_sync_end + var->left_margin + dx;
+	timing.hor_blank_start = timing.hor_addr + dx;
+	timing.hor_blank_end = timing.hor_total - dx;
+	timing.ver_addr = cyres;
+	timing.ver_sync_start = timing.ver_addr + var->lower_margin + dy;
+	timing.ver_sync_end = timing.ver_sync_start + var->vsync_len;
+	timing.ver_total = timing.ver_sync_end + var->upper_margin + dy;
+	timing.ver_blank_start = timing.ver_addr + dy;
+	timing.ver_blank_end = timing.ver_total - dy;
+	return timing;
+}
+
+void viafb_fill_crtc_timing(const struct fb_var_screeninfo *var,
+	u16 cxres, u16 cyres, int iga)
+{
+	struct via_display_timing crt_reg = var_to_timing(var,
+		cxres ? cxres : var->xres, cyres ? cyres : var->yres);
+
+	if (iga == IGA1)
+		via_set_primary_timing(&crt_reg);
+	else if (iga == IGA2)
+		via_set_secondary_timing(&crt_reg);
+
+	viafb_load_fetch_count_reg(var->xres, var->bits_per_pixel / 8, iga);
+	if (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266
+		&& viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400)
+		viafb_load_FIFO_reg(iga, var->xres, var->yres);
+
+	viafb_set_vclock(PICOS2KHZ(var->pixclock) * 1000, iga);
+}
+
+void viafb_init_chip_info(int chip_type)
+{
+	via_clock_init(&clock, chip_type);
+	init_gfx_chip_info(chip_type);
+	init_tmds_chip_info();
+	init_lvds_chip_info();
+
+	/*Set IGA path for each device */
+	viafb_set_iga_path();
+
+	viaparinfo->lvds_setting_info->display_method = viafb_lcd_dsp_method;
+	viaparinfo->lvds_setting_info->lcd_mode = viafb_lcd_mode;
+	viaparinfo->lvds_setting_info2->display_method =
+		viaparinfo->lvds_setting_info->display_method;
+	viaparinfo->lvds_setting_info2->lcd_mode =
+		viaparinfo->lvds_setting_info->lcd_mode;
+}
+
+void viafb_update_device_setting(int hres, int vres, int bpp, int flag)
+{
+	if (flag == 0) {
+		viaparinfo->tmds_setting_info->h_active = hres;
+		viaparinfo->tmds_setting_info->v_active = vres;
+	} else {
+
+		if (viaparinfo->tmds_setting_info->iga_path == IGA2) {
+			viaparinfo->tmds_setting_info->h_active = hres;
+			viaparinfo->tmds_setting_info->v_active = vres;
+		}
+
+	}
+}
+
+static void init_gfx_chip_info(int chip_type)
+{
+	u8 tmp;
+
+	viaparinfo->chip_info->gfx_chip_name = chip_type;
+
+	/* Check revision of CLE266 Chip */
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
+		/* CR4F only define in CLE266.CX chip */
+		tmp = viafb_read_reg(VIACR, CR4F);
+		viafb_write_reg(CR4F, VIACR, 0x55);
+		if (viafb_read_reg(VIACR, CR4F) != 0x55)
+			viaparinfo->chip_info->gfx_chip_revision =
+			CLE266_REVISION_AX;
+		else
+			viaparinfo->chip_info->gfx_chip_revision =
+			CLE266_REVISION_CX;
+		/* restore orignal CR4F value */
+		viafb_write_reg(CR4F, VIACR, tmp);
+	}
+
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
+		tmp = viafb_read_reg(VIASR, SR43);
+		DEBUG_MSG(KERN_INFO "SR43:%X\n", tmp);
+		if (tmp & 0x02) {
+			viaparinfo->chip_info->gfx_chip_revision =
+				CX700_REVISION_700M2;
+		} else if (tmp & 0x40) {
+			viaparinfo->chip_info->gfx_chip_revision =
+				CX700_REVISION_700M;
+		} else {
+			viaparinfo->chip_info->gfx_chip_revision =
+				CX700_REVISION_700;
+		}
+	}
+
+	/* Determine which 2D engine we have */
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_VX800:
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		viaparinfo->chip_info->twod_engine = VIA_2D_ENG_M1;
+		break;
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M900:
+		viaparinfo->chip_info->twod_engine = VIA_2D_ENG_H5;
+		break;
+	default:
+		viaparinfo->chip_info->twod_engine = VIA_2D_ENG_H2;
+		break;
+	}
+}
+
+static void init_tmds_chip_info(void)
+{
+	viafb_tmds_trasmitter_identify();
+
+	if (INTERFACE_NONE == viaparinfo->chip_info->tmds_chip_info.
+		output_interface) {
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_CX700:
+			{
+				/* we should check support by hardware layout.*/
+				if ((viafb_display_hardware_layout ==
+				     HW_LAYOUT_DVI_ONLY)
+				    || (viafb_display_hardware_layout ==
+					HW_LAYOUT_LCD_DVI)) {
+					viaparinfo->chip_info->tmds_chip_info.
+					    output_interface = INTERFACE_TMDS;
+				} else {
+					viaparinfo->chip_info->tmds_chip_info.
+						output_interface =
+						INTERFACE_NONE;
+				}
+				break;
+			}
+		case UNICHROME_K8M890:
+		case UNICHROME_P4M900:
+		case UNICHROME_P4M890:
+			/* TMDS on PCIE, we set DFPLOW as default. */
+			viaparinfo->chip_info->tmds_chip_info.output_interface =
+			    INTERFACE_DFP_LOW;
+			break;
+		default:
+			{
+				/* set DVP1 default for DVI */
+				viaparinfo->chip_info->tmds_chip_info
+				.output_interface = INTERFACE_DVP1;
+			}
+		}
+	}
+
+	DEBUG_MSG(KERN_INFO "TMDS Chip = %d\n",
+		  viaparinfo->chip_info->tmds_chip_info.tmds_chip_name);
+	viafb_init_dvi_size(&viaparinfo->shared->chip_info.tmds_chip_info,
+		&viaparinfo->shared->tmds_setting_info);
+}
+
+static void init_lvds_chip_info(void)
+{
+	viafb_lvds_trasmitter_identify();
+	viafb_init_lcd_size();
+	viafb_init_lvds_output_interface(&viaparinfo->chip_info->lvds_chip_info,
+				   viaparinfo->lvds_setting_info);
+	if (viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name) {
+		viafb_init_lvds_output_interface(&viaparinfo->chip_info->
+			lvds_chip_info2, viaparinfo->lvds_setting_info2);
+	}
+	/*If CX700,two singel LCD, we need to reassign
+	   LCD interface to different LVDS port */
+	if ((UNICHROME_CX700 == viaparinfo->chip_info->gfx_chip_name)
+	    && (HW_LAYOUT_LCD1_LCD2 == viafb_display_hardware_layout)) {
+		if ((INTEGRATED_LVDS == viaparinfo->chip_info->lvds_chip_info.
+			lvds_chip_name) && (INTEGRATED_LVDS ==
+			viaparinfo->chip_info->
+			lvds_chip_info2.lvds_chip_name)) {
+			viaparinfo->chip_info->lvds_chip_info.output_interface =
+				INTERFACE_LVDS0;
+			viaparinfo->chip_info->lvds_chip_info2.
+				output_interface =
+			    INTERFACE_LVDS1;
+		}
+	}
+
+	DEBUG_MSG(KERN_INFO "LVDS Chip = %d\n",
+		  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
+	DEBUG_MSG(KERN_INFO "LVDS1 output_interface = %d\n",
+		  viaparinfo->chip_info->lvds_chip_info.output_interface);
+	DEBUG_MSG(KERN_INFO "LVDS2 output_interface = %d\n",
+		  viaparinfo->chip_info->lvds_chip_info.output_interface);
+}
+
+void viafb_init_dac(int set_iga)
+{
+	int i;
+	u8 tmp;
+
+	if (set_iga == IGA1) {
+		/* access Primary Display's LUT */
+		viafb_write_reg_mask(SR1A, VIASR, 0x00, BIT0);
+		/* turn off LCK */
+		viafb_write_reg_mask(SR1B, VIASR, 0x00, BIT7 + BIT6);
+		for (i = 0; i < 256; i++) {
+			write_dac_reg(i, palLUT_table[i].red,
+				      palLUT_table[i].green,
+				      palLUT_table[i].blue);
+		}
+		/* turn on LCK */
+		viafb_write_reg_mask(SR1B, VIASR, 0xC0, BIT7 + BIT6);
+	} else {
+		tmp = viafb_read_reg(VIACR, CR6A);
+		/* access Secondary Display's LUT */
+		viafb_write_reg_mask(CR6A, VIACR, 0x40, BIT6);
+		viafb_write_reg_mask(SR1A, VIASR, 0x01, BIT0);
+		for (i = 0; i < 256; i++) {
+			write_dac_reg(i, palLUT_table[i].red,
+				      palLUT_table[i].green,
+				      palLUT_table[i].blue);
+		}
+		/* set IGA1 DAC for default */
+		viafb_write_reg_mask(SR1A, VIASR, 0x00, BIT0);
+		viafb_write_reg(CR6A, VIACR, tmp);
+	}
+}
+
+static void device_screen_off(void)
+{
+	/* turn off CRT screen (IGA1) */
+	viafb_write_reg_mask(SR01, VIASR, 0x20, BIT5);
+}
+
+static void device_screen_on(void)
+{
+	/* turn on CRT screen (IGA1) */
+	viafb_write_reg_mask(SR01, VIASR, 0x00, BIT5);
+}
+
+static void set_display_channel(void)
+{
+	/*If viafb_LCD2_ON, on cx700, internal lvds's information
+	is keeped on lvds_setting_info2 */
+	if (viafb_LCD2_ON &&
+		viaparinfo->lvds_setting_info2->device_lcd_dualedge) {
+		/* For dual channel LCD: */
+		/* Set to Dual LVDS channel. */
+		viafb_write_reg_mask(CRD2, VIACR, 0x20, BIT4 + BIT5);
+	} else if (viafb_LCD_ON && viafb_DVI_ON) {
+		/* For LCD+DFP: */
+		/* Set to LVDS1 + TMDS channel. */
+		viafb_write_reg_mask(CRD2, VIACR, 0x10, BIT4 + BIT5);
+	} else if (viafb_DVI_ON) {
+		/* Set to single TMDS channel. */
+		viafb_write_reg_mask(CRD2, VIACR, 0x30, BIT4 + BIT5);
+	} else if (viafb_LCD_ON) {
+		if (viaparinfo->lvds_setting_info->device_lcd_dualedge) {
+			/* For dual channel LCD: */
+			/* Set to Dual LVDS channel. */
+			viafb_write_reg_mask(CRD2, VIACR, 0x20, BIT4 + BIT5);
+		} else {
+			/* Set to LVDS0 + LVDS1 channel. */
+			viafb_write_reg_mask(CRD2, VIACR, 0x00, BIT4 + BIT5);
+		}
+	}
+}
+
+static u8 get_sync(struct fb_var_screeninfo *var)
+{
+	u8 polarity = 0;
+
+	if (!(var->sync & FB_SYNC_HOR_HIGH_ACT))
+		polarity |= VIA_HSYNC_NEGATIVE;
+	if (!(var->sync & FB_SYNC_VERT_HIGH_ACT))
+		polarity |= VIA_VSYNC_NEGATIVE;
+	return polarity;
+}
+
+static void hw_init(void)
+{
+	int i;
+
+	inb(VIAStatus);
+	outb(0x00, VIAAR);
+
+	/* Write Common Setting for Video Mode */
+	viafb_write_regx(common_vga, ARRAY_SIZE(common_vga));
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_CLE266:
+		viafb_write_regx(CLE266_ModeXregs, NUM_TOTAL_CLE266_ModeXregs);
+		break;
+
+	case UNICHROME_K400:
+		viafb_write_regx(KM400_ModeXregs, NUM_TOTAL_KM400_ModeXregs);
+		break;
+
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+		viafb_write_regx(CN400_ModeXregs, NUM_TOTAL_CN400_ModeXregs);
+		break;
+
+	case UNICHROME_CN700:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+		viafb_write_regx(CN700_ModeXregs, NUM_TOTAL_CN700_ModeXregs);
+		break;
+
+	case UNICHROME_CX700:
+	case UNICHROME_VX800:
+		viafb_write_regx(CX700_ModeXregs, NUM_TOTAL_CX700_ModeXregs);
+		break;
+
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		viafb_write_regx(VX855_ModeXregs, NUM_TOTAL_VX855_ModeXregs);
+		break;
+	}
+
+	/* magic required on VX900 for correct modesetting on IGA1 */
+	via_write_reg_mask(VIACR, 0x45, 0x00, 0x01);
+
+	/* probably this should go to the scaling code one day */
+	via_write_reg_mask(VIACR, 0xFD, 0, 0x80); /* VX900 hw scale on IGA2 */
+	viafb_write_regx(scaling_parameters, ARRAY_SIZE(scaling_parameters));
+
+	/* Fill VPIT Parameters */
+	/* Write Misc Register */
+	outb(VPIT.Misc, VIA_MISC_REG_WRITE);
+
+	/* Write Sequencer */
+	for (i = 1; i <= StdSR; i++)
+		via_write_reg(VIASR, i, VPIT.SR[i - 1]);
+
+	viafb_write_reg_mask(0x15, VIASR, 0xA2, 0xA2);
+
+	/* Write Graphic Controller */
+	for (i = 0; i < StdGR; i++)
+		via_write_reg(VIAGR, i, VPIT.GR[i]);
+
+	/* Write Attribute Controller */
+	for (i = 0; i < StdAR; i++) {
+		inb(VIAStatus);
+		outb(i, VIAAR);
+		outb(VPIT.AR[i], VIAAR);
+	}
+
+	inb(VIAStatus);
+	outb(0x20, VIAAR);
+
+	load_fix_bit_crtc_reg();
+}
+
+int viafb_setmode(void)
+{
+	int j, cxres = 0, cyres = 0;
+	int port;
+	u32 devices = viaparinfo->shared->iga1_devices
+		| viaparinfo->shared->iga2_devices;
+	u8 value, index, mask;
+	struct fb_var_screeninfo var2;
+
+	device_screen_off();
+	device_off();
+	via_set_state(devices, VIA_STATE_OFF);
+
+	hw_init();
+
+	/* Update Patch Register */
+
+	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266
+		|| viaparinfo->chip_info->gfx_chip_name == UNICHROME_K400)
+		&& viafbinfo->var.xres == 1024 && viafbinfo->var.yres == 768) {
+		for (j = 0; j < res_patch_table[0].table_length; j++) {
+			index = res_patch_table[0].io_reg_table[j].index;
+			port = res_patch_table[0].io_reg_table[j].port;
+			value = res_patch_table[0].io_reg_table[j].value;
+			mask = res_patch_table[0].io_reg_table[j].mask;
+			viafb_write_reg_mask(index, port, value, mask);
+		}
+	}
+
+	via_set_primary_pitch(viafbinfo->fix.line_length);
+	via_set_secondary_pitch(viafb_dual_fb ? viafbinfo1->fix.line_length
+		: viafbinfo->fix.line_length);
+	via_set_primary_color_depth(viaparinfo->depth);
+	via_set_secondary_color_depth(viafb_dual_fb ? viaparinfo1->depth
+		: viaparinfo->depth);
+	via_set_source(viaparinfo->shared->iga1_devices, IGA1);
+	via_set_source(viaparinfo->shared->iga2_devices, IGA2);
+	if (viaparinfo->shared->iga2_devices)
+		enable_second_display_channel();
+	else
+		disable_second_display_channel();
+
+	/* Update Refresh Rate Setting */
+
+	/* Clear On Screen */
+
+	if (viafb_dual_fb) {
+		var2 = viafbinfo1->var;
+	} else if (viafb_SAMM_ON) {
+		viafb_fill_var_timing_info(&var2, viafb_get_best_mode(
+			viafb_second_xres, viafb_second_yres, viafb_refresh1));
+		cxres = viafbinfo->var.xres;
+		cyres = viafbinfo->var.yres;
+		var2.bits_per_pixel = viafbinfo->var.bits_per_pixel;
+	}
+
+	/* CRT set mode */
+	if (viafb_CRT_ON) {
+		if (viaparinfo->shared->iga2_devices & VIA_CRT
+			&& viafb_SAMM_ON)
+			viafb_fill_crtc_timing(&var2, cxres, cyres, IGA2);
+		else
+			viafb_fill_crtc_timing(&viafbinfo->var, 0, 0,
+				(viaparinfo->shared->iga1_devices & VIA_CRT)
+				? IGA1 : IGA2);
+
+		/* Patch if set_hres is not 8 alignment (1366) to viafb_setmode
+		to 8 alignment (1368),there is several pixels (2 pixels)
+		on right side of screen. */
+		if (viafbinfo->var.xres % 8) {
+			viafb_unlock_crt();
+			viafb_write_reg(CR02, VIACR,
+				viafb_read_reg(VIACR, CR02) - 1);
+			viafb_lock_crt();
+		}
+	}
+
+	if (viafb_DVI_ON) {
+		if (viaparinfo->shared->tmds_setting_info.iga_path == IGA2
+			&& viafb_SAMM_ON)
+			viafb_dvi_set_mode(&var2, cxres, cyres, IGA2);
+		else
+			viafb_dvi_set_mode(&viafbinfo->var, 0, 0,
+				viaparinfo->tmds_setting_info->iga_path);
+	}
+
+	if (viafb_LCD_ON) {
+		if (viafb_SAMM_ON &&
+			(viaparinfo->lvds_setting_info->iga_path == IGA2)) {
+			viafb_lcd_set_mode(&var2, cxres, cyres,
+				viaparinfo->lvds_setting_info,
+				&viaparinfo->chip_info->lvds_chip_info);
+		} else {
+			/* IGA1 doesn't have LCD scaling, so set it center. */
+			if (viaparinfo->lvds_setting_info->iga_path == IGA1) {
+				viaparinfo->lvds_setting_info->display_method =
+				    LCD_CENTERING;
+			}
+			viafb_lcd_set_mode(&viafbinfo->var, 0, 0,
+				viaparinfo->lvds_setting_info,
+				&viaparinfo->chip_info->lvds_chip_info);
+		}
+	}
+	if (viafb_LCD2_ON) {
+		if (viafb_SAMM_ON &&
+			(viaparinfo->lvds_setting_info2->iga_path == IGA2)) {
+			viafb_lcd_set_mode(&var2, cxres, cyres,
+				viaparinfo->lvds_setting_info2,
+				&viaparinfo->chip_info->lvds_chip_info2);
+		} else {
+			/* IGA1 doesn't have LCD scaling, so set it center. */
+			if (viaparinfo->lvds_setting_info2->iga_path == IGA1) {
+				viaparinfo->lvds_setting_info2->display_method =
+				    LCD_CENTERING;
+			}
+			viafb_lcd_set_mode(&viafbinfo->var, 0, 0,
+				viaparinfo->lvds_setting_info2,
+				&viaparinfo->chip_info->lvds_chip_info2);
+		}
+	}
+
+	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700)
+	    && (viafb_LCD_ON || viafb_DVI_ON))
+		set_display_channel();
+
+	/* If set mode normally, save resolution information for hot-plug . */
+	if (!viafb_hotplug) {
+		viafb_hotplug_Xres = viafbinfo->var.xres;
+		viafb_hotplug_Yres = viafbinfo->var.yres;
+		viafb_hotplug_bpp = viafbinfo->var.bits_per_pixel;
+		viafb_hotplug_refresh = viafb_refresh;
+
+		if (viafb_DVI_ON)
+			viafb_DeviceStatus = DVI_Device;
+		else
+			viafb_DeviceStatus = CRT_Device;
+	}
+	device_on();
+	if (!viafb_SAMM_ON)
+		via_set_sync_polarity(devices, get_sync(&viafbinfo->var));
+	else {
+		via_set_sync_polarity(viaparinfo->shared->iga1_devices,
+			get_sync(&viafbinfo->var));
+		via_set_sync_polarity(viaparinfo->shared->iga2_devices,
+			get_sync(&var2));
+	}
+
+	clock.set_engine_pll_state(VIA_STATE_ON);
+	clock.set_primary_clock_source(VIA_CLKSRC_X1, true);
+	clock.set_secondary_clock_source(VIA_CLKSRC_X1, true);
+
+#ifdef CONFIG_FB_VIA_X_COMPATIBILITY
+	clock.set_primary_pll_state(VIA_STATE_ON);
+	clock.set_primary_clock_state(VIA_STATE_ON);
+	clock.set_secondary_pll_state(VIA_STATE_ON);
+	clock.set_secondary_clock_state(VIA_STATE_ON);
+#else
+	if (viaparinfo->shared->iga1_devices) {
+		clock.set_primary_pll_state(VIA_STATE_ON);
+		clock.set_primary_clock_state(VIA_STATE_ON);
+	} else {
+		clock.set_primary_pll_state(VIA_STATE_OFF);
+		clock.set_primary_clock_state(VIA_STATE_OFF);
+	}
+
+	if (viaparinfo->shared->iga2_devices) {
+		clock.set_secondary_pll_state(VIA_STATE_ON);
+		clock.set_secondary_clock_state(VIA_STATE_ON);
+	} else {
+		clock.set_secondary_pll_state(VIA_STATE_OFF);
+		clock.set_secondary_clock_state(VIA_STATE_OFF);
+	}
+#endif /*CONFIG_FB_VIA_X_COMPATIBILITY*/
+
+	via_set_state(devices, VIA_STATE_ON);
+	device_screen_on();
+	return 1;
+}
+
+int viafb_get_refresh(int hres, int vres, u32 long_refresh)
+{
+	const struct fb_videomode *best;
+
+	best = viafb_get_best_mode(hres, vres, long_refresh);
+	if (!best)
+		return 60;
+
+	if (abs(best->refresh - long_refresh) > 3) {
+		if (hres == 1200 && vres == 900)
+			return 49; /* OLPC DCON only supports 50 Hz */
+		else
+			return 60;
+	}
+
+	return best->refresh;
+}
+
+static void device_off(void)
+{
+	viafb_dvi_disable();
+	viafb_lcd_disable();
+}
+
+static void device_on(void)
+{
+	if (viafb_DVI_ON == 1)
+		viafb_dvi_enable();
+	if (viafb_LCD_ON == 1)
+		viafb_lcd_enable();
+}
+
+static void enable_second_display_channel(void)
+{
+	/* to enable second display channel. */
+	viafb_write_reg_mask(CR6A, VIACR, 0x00, BIT6);
+	viafb_write_reg_mask(CR6A, VIACR, BIT7, BIT7);
+	viafb_write_reg_mask(CR6A, VIACR, BIT6, BIT6);
+}
+
+static void disable_second_display_channel(void)
+{
+	/* to disable second display channel. */
+	viafb_write_reg_mask(CR6A, VIACR, 0x00, BIT6);
+	viafb_write_reg_mask(CR6A, VIACR, 0x00, BIT7);
+	viafb_write_reg_mask(CR6A, VIACR, BIT6, BIT6);
+}
+
+void viafb_set_dpa_gfx(int output_interface, struct GFX_DPA_SETTING\
+					*p_gfx_dpa_setting)
+{
+	switch (output_interface) {
+	case INTERFACE_DVP0:
+		{
+			/* DVP0 Clock Polarity and Adjust: */
+			viafb_write_reg_mask(CR96, VIACR,
+				       p_gfx_dpa_setting->DVP0, 0x0F);
+
+			/* DVP0 Clock and Data Pads Driving: */
+			viafb_write_reg_mask(SR1E, VIASR,
+				       p_gfx_dpa_setting->DVP0ClockDri_S, BIT2);
+			viafb_write_reg_mask(SR2A, VIASR,
+				       p_gfx_dpa_setting->DVP0ClockDri_S1,
+				       BIT4);
+			viafb_write_reg_mask(SR1B, VIASR,
+				       p_gfx_dpa_setting->DVP0DataDri_S, BIT1);
+			viafb_write_reg_mask(SR2A, VIASR,
+				       p_gfx_dpa_setting->DVP0DataDri_S1, BIT5);
+			break;
+		}
+
+	case INTERFACE_DVP1:
+		{
+			/* DVP1 Clock Polarity and Adjust: */
+			viafb_write_reg_mask(CR9B, VIACR,
+				       p_gfx_dpa_setting->DVP1, 0x0F);
+
+			/* DVP1 Clock and Data Pads Driving: */
+			viafb_write_reg_mask(SR65, VIASR,
+				       p_gfx_dpa_setting->DVP1Driving, 0x0F);
+			break;
+		}
+
+	case INTERFACE_DFP_HIGH:
+		{
+			viafb_write_reg_mask(CR97, VIACR,
+				       p_gfx_dpa_setting->DFPHigh, 0x0F);
+			break;
+		}
+
+	case INTERFACE_DFP_LOW:
+		{
+			viafb_write_reg_mask(CR99, VIACR,
+				       p_gfx_dpa_setting->DFPLow, 0x0F);
+			break;
+		}
+
+	case INTERFACE_DFP:
+		{
+			viafb_write_reg_mask(CR97, VIACR,
+				       p_gfx_dpa_setting->DFPHigh, 0x0F);
+			viafb_write_reg_mask(CR99, VIACR,
+				       p_gfx_dpa_setting->DFPLow, 0x0F);
+			break;
+		}
+	}
+}
+
+void viafb_fill_var_timing_info(struct fb_var_screeninfo *var,
+	const struct fb_videomode *mode)
+{
+	var->pixclock = mode->pixclock;
+	var->xres = mode->xres;
+	var->yres = mode->yres;
+	var->left_margin = mode->left_margin;
+	var->right_margin = mode->right_margin;
+	var->hsync_len = mode->hsync_len;
+	var->upper_margin = mode->upper_margin;
+	var->lower_margin = mode->lower_margin;
+	var->vsync_len = mode->vsync_len;
+	var->sync = mode->sync;
+}
diff --git a/drivers/video/fbdev/via/hw.h b/drivers/video/fbdev/via/hw.h
new file mode 100644
index 0000000000..7d97f6dde9
--- /dev/null
+++ b/drivers/video/fbdev/via/hw.h
@@ -0,0 +1,662 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __HW_H__
+#define __HW_H__
+
+#include <linux/seq_file.h>
+
+#include "viamode.h"
+#include "global.h"
+#include "via_modesetting.h"
+
+#define viafb_read_reg(p, i)			via_read_reg(p, i)
+#define viafb_write_reg(i, p, d)		via_write_reg(p, i, d)
+#define viafb_write_reg_mask(i, p, d, m)	via_write_reg_mask(p, i, d, m)
+
+/* VIA output devices */
+#define VIA_LDVP0	0x00000001
+#define VIA_LDVP1	0x00000002
+#define VIA_DVP0	0x00000004
+#define VIA_CRT		0x00000010
+#define VIA_DVP1	0x00000020
+#define VIA_LVDS1	0x00000040
+#define VIA_LVDS2	0x00000080
+
+/* VIA output device power states */
+#define VIA_STATE_ON		0
+#define VIA_STATE_STANDBY	1
+#define VIA_STATE_SUSPEND	2
+#define VIA_STATE_OFF		3
+
+/* VIA output device sync polarity */
+#define VIA_HSYNC_NEGATIVE	0x01
+#define VIA_VSYNC_NEGATIVE	0x02
+
+/**********************************************************/
+/* Definition IGA2 Design Method of CRTC Shadow Registers */
+/**********************************************************/
+#define IGA2_HOR_TOTAL_SHADOW_FORMULA(x)           ((x/8)-5)
+#define IGA2_HOR_BLANK_END_SHADOW_FORMULA(x, y)     (((x+y)/8)-1)
+#define IGA2_VER_TOTAL_SHADOW_FORMULA(x)           ((x)-2)
+#define IGA2_VER_ADDR_SHADOW_FORMULA(x)            ((x)-1)
+#define IGA2_VER_BLANK_START_SHADOW_FORMULA(x)     ((x)-1)
+#define IGA2_VER_BLANK_END_SHADOW_FORMULA(x, y)     ((x+y)-1)
+#define IGA2_VER_SYNC_START_SHADOW_FORMULA(x)      (x)
+#define IGA2_VER_SYNC_END_SHADOW_FORMULA(x, y)      (x+y)
+
+/* Define Register Number for IGA2 Shadow CRTC Timing */
+
+/* location: {CR6D,0,7},{CR71,3,3} */
+#define IGA2_SHADOW_HOR_TOTAL_REG_NUM       2
+/* location: {CR6E,0,7} */
+#define IGA2_SHADOW_HOR_BLANK_END_REG_NUM   1
+/* location: {CR6F,0,7},{CR71,0,2} */
+#define IGA2_SHADOW_VER_TOTAL_REG_NUM       2
+/* location: {CR70,0,7},{CR71,4,6} */
+#define IGA2_SHADOW_VER_ADDR_REG_NUM        2
+/* location: {CR72,0,7},{CR74,4,6} */
+#define IGA2_SHADOW_VER_BLANK_START_REG_NUM 2
+/* location: {CR73,0,7},{CR74,0,2} */
+#define IGA2_SHADOW_VER_BLANK_END_REG_NUM   2
+/* location: {CR75,0,7},{CR76,4,6} */
+#define IGA2_SHADOW_VER_SYNC_START_REG_NUM  2
+/* location: {CR76,0,3} */
+#define IGA2_SHADOW_VER_SYNC_END_REG_NUM    1
+
+/* Define Fetch Count Register*/
+
+/* location: {SR1C,0,7},{SR1D,0,1} */
+#define IGA1_FETCH_COUNT_REG_NUM        2
+/* 16 bytes alignment. */
+#define IGA1_FETCH_COUNT_ALIGN_BYTE     16
+/* x: H resolution, y: color depth */
+#define IGA1_FETCH_COUNT_PATCH_VALUE    4
+#define IGA1_FETCH_COUNT_FORMULA(x, y)   \
+	(((x*y)/IGA1_FETCH_COUNT_ALIGN_BYTE) + IGA1_FETCH_COUNT_PATCH_VALUE)
+
+/* location: {CR65,0,7},{CR67,2,3} */
+#define IGA2_FETCH_COUNT_REG_NUM        2
+#define IGA2_FETCH_COUNT_ALIGN_BYTE     16
+#define IGA2_FETCH_COUNT_PATCH_VALUE    0
+#define IGA2_FETCH_COUNT_FORMULA(x, y)   \
+	(((x*y)/IGA2_FETCH_COUNT_ALIGN_BYTE) + IGA2_FETCH_COUNT_PATCH_VALUE)
+
+/* Staring Address*/
+
+/* location: {CR0C,0,7},{CR0D,0,7},{CR34,0,7},{CR48,0,1} */
+#define IGA1_STARTING_ADDR_REG_NUM      4
+/* location: {CR62,1,7},{CR63,0,7},{CR64,0,7} */
+#define IGA2_STARTING_ADDR_REG_NUM      3
+
+/* Define Display OFFSET*/
+/* These value are by HW suggested value*/
+/* location: {SR17,0,7} */
+#define K800_IGA1_FIFO_MAX_DEPTH                384
+/* location: {SR16,0,5},{SR16,7,7} */
+#define K800_IGA1_FIFO_THRESHOLD                328
+/* location: {SR18,0,5},{SR18,7,7} */
+#define K800_IGA1_FIFO_HIGH_THRESHOLD           296
+/* location: {SR22,0,4}. (128/4) =64, K800 must be set zero, */
+				/* because HW only 5 bits */
+#define K800_IGA1_DISPLAY_QUEUE_EXPIRE_NUM      0
+
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define K800_IGA2_FIFO_MAX_DEPTH                384
+/* location: {CR68,0,3},{CR95,4,6} */
+#define K800_IGA2_FIFO_THRESHOLD                328
+/* location: {CR92,0,3},{CR95,0,2} */
+#define K800_IGA2_FIFO_HIGH_THRESHOLD           296
+/* location: {CR94,0,6} */
+#define K800_IGA2_DISPLAY_QUEUE_EXPIRE_NUM      128
+
+/* location: {SR17,0,7} */
+#define P880_IGA1_FIFO_MAX_DEPTH                192
+/* location: {SR16,0,5},{SR16,7,7} */
+#define P880_IGA1_FIFO_THRESHOLD                128
+/* location: {SR18,0,5},{SR18,7,7} */
+#define P880_IGA1_FIFO_HIGH_THRESHOLD           64
+/* location: {SR22,0,4}. (128/4) =64, K800 must be set zero, */
+				/* because HW only 5 bits */
+#define P880_IGA1_DISPLAY_QUEUE_EXPIRE_NUM      0
+
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define P880_IGA2_FIFO_MAX_DEPTH                96
+/* location: {CR68,0,3},{CR95,4,6} */
+#define P880_IGA2_FIFO_THRESHOLD                64
+/* location: {CR92,0,3},{CR95,0,2} */
+#define P880_IGA2_FIFO_HIGH_THRESHOLD           32
+/* location: {CR94,0,6} */
+#define P880_IGA2_DISPLAY_QUEUE_EXPIRE_NUM      128
+
+/* VT3314 chipset*/
+
+/* location: {SR17,0,7} */
+#define CN700_IGA1_FIFO_MAX_DEPTH               96
+/* location: {SR16,0,5},{SR16,7,7} */
+#define CN700_IGA1_FIFO_THRESHOLD               80
+/* location: {SR18,0,5},{SR18,7,7} */
+#define CN700_IGA1_FIFO_HIGH_THRESHOLD          64
+/* location: {SR22,0,4}. (128/4) =64, P800 must be set zero,
+				because HW only 5 bits */
+#define CN700_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     0
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define CN700_IGA2_FIFO_MAX_DEPTH               96
+/* location: {CR68,0,3},{CR95,4,6} */
+#define CN700_IGA2_FIFO_THRESHOLD               80
+/* location: {CR92,0,3},{CR95,0,2} */
+#define CN700_IGA2_FIFO_HIGH_THRESHOLD          32
+/* location: {CR94,0,6} */
+#define CN700_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     128
+
+/* For VT3324, these values are suggested by HW */
+/* location: {SR17,0,7} */
+#define CX700_IGA1_FIFO_MAX_DEPTH               192
+/* location: {SR16,0,5},{SR16,7,7} */
+#define CX700_IGA1_FIFO_THRESHOLD               128
+/* location: {SR18,0,5},{SR18,7,7} */
+#define CX700_IGA1_FIFO_HIGH_THRESHOLD          128
+/* location: {SR22,0,4} */
+#define CX700_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     124
+
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define CX700_IGA2_FIFO_MAX_DEPTH               96
+/* location: {CR68,0,3},{CR95,4,6} */
+#define CX700_IGA2_FIFO_THRESHOLD               64
+/* location: {CR92,0,3},{CR95,0,2} */
+#define CX700_IGA2_FIFO_HIGH_THRESHOLD          32
+/* location: {CR94,0,6} */
+#define CX700_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     128
+
+/* VT3336 chipset*/
+/* location: {SR17,0,7} */
+#define K8M890_IGA1_FIFO_MAX_DEPTH               360
+/* location: {SR16,0,5},{SR16,7,7} */
+#define K8M890_IGA1_FIFO_THRESHOLD               328
+/* location: {SR18,0,5},{SR18,7,7} */
+#define K8M890_IGA1_FIFO_HIGH_THRESHOLD          296
+/* location: {SR22,0,4}. */
+#define K8M890_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     124
+
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define K8M890_IGA2_FIFO_MAX_DEPTH               360
+/* location: {CR68,0,3},{CR95,4,6} */
+#define K8M890_IGA2_FIFO_THRESHOLD               328
+/* location: {CR92,0,3},{CR95,0,2} */
+#define K8M890_IGA2_FIFO_HIGH_THRESHOLD          296
+/* location: {CR94,0,6} */
+#define K8M890_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     124
+
+/* VT3327 chipset*/
+/* location: {SR17,0,7} */
+#define P4M890_IGA1_FIFO_MAX_DEPTH               96
+/* location: {SR16,0,5},{SR16,7,7} */
+#define P4M890_IGA1_FIFO_THRESHOLD               76
+/* location: {SR18,0,5},{SR18,7,7} */
+#define P4M890_IGA1_FIFO_HIGH_THRESHOLD          64
+/* location: {SR22,0,4}. (32/4) =8 */
+#define P4M890_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     32
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define P4M890_IGA2_FIFO_MAX_DEPTH               96
+/* location: {CR68,0,3},{CR95,4,6} */
+#define P4M890_IGA2_FIFO_THRESHOLD               76
+/* location: {CR92,0,3},{CR95,0,2} */
+#define P4M890_IGA2_FIFO_HIGH_THRESHOLD          64
+/* location: {CR94,0,6} */
+#define P4M890_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     32
+
+/* VT3364 chipset*/
+/* location: {SR17,0,7} */
+#define P4M900_IGA1_FIFO_MAX_DEPTH               96
+/* location: {SR16,0,5},{SR16,7,7} */
+#define P4M900_IGA1_FIFO_THRESHOLD               76
+/* location: {SR18,0,5},{SR18,7,7} */
+#define P4M900_IGA1_FIFO_HIGH_THRESHOLD          76
+/* location: {SR22,0,4}. */
+#define P4M900_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     32
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define P4M900_IGA2_FIFO_MAX_DEPTH               96
+/* location: {CR68,0,3},{CR95,4,6} */
+#define P4M900_IGA2_FIFO_THRESHOLD               76
+/* location: {CR92,0,3},{CR95,0,2} */
+#define P4M900_IGA2_FIFO_HIGH_THRESHOLD          76
+/* location: {CR94,0,6} */
+#define P4M900_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     32
+
+/* For VT3353, these values are suggested by HW */
+/* location: {SR17,0,7} */
+#define VX800_IGA1_FIFO_MAX_DEPTH               192
+/* location: {SR16,0,5},{SR16,7,7} */
+#define VX800_IGA1_FIFO_THRESHOLD               152
+/* location: {SR18,0,5},{SR18,7,7} */
+#define VX800_IGA1_FIFO_HIGH_THRESHOLD          152
+/* location: {SR22,0,4} */
+#define VX800_IGA1_DISPLAY_QUEUE_EXPIRE_NUM      64
+/* location: {CR68,4,7},{CR94,7,7},{CR95,7,7} */
+#define VX800_IGA2_FIFO_MAX_DEPTH               96
+/* location: {CR68,0,3},{CR95,4,6} */
+#define VX800_IGA2_FIFO_THRESHOLD               64
+/* location: {CR92,0,3},{CR95,0,2} */
+#define VX800_IGA2_FIFO_HIGH_THRESHOLD          32
+/* location: {CR94,0,6} */
+#define VX800_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     128
+
+/* For VT3409 */
+#define VX855_IGA1_FIFO_MAX_DEPTH               400
+#define VX855_IGA1_FIFO_THRESHOLD               320
+#define VX855_IGA1_FIFO_HIGH_THRESHOLD          320
+#define VX855_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     160
+
+#define VX855_IGA2_FIFO_MAX_DEPTH               200
+#define VX855_IGA2_FIFO_THRESHOLD               160
+#define VX855_IGA2_FIFO_HIGH_THRESHOLD          160
+#define VX855_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     320
+
+/* For VT3410 */
+#define VX900_IGA1_FIFO_MAX_DEPTH               400
+#define VX900_IGA1_FIFO_THRESHOLD               320
+#define VX900_IGA1_FIFO_HIGH_THRESHOLD          320
+#define VX900_IGA1_DISPLAY_QUEUE_EXPIRE_NUM     160
+
+#define VX900_IGA2_FIFO_MAX_DEPTH               192
+#define VX900_IGA2_FIFO_THRESHOLD               160
+#define VX900_IGA2_FIFO_HIGH_THRESHOLD          160
+#define VX900_IGA2_DISPLAY_QUEUE_EXPIRE_NUM     320
+
+#define IGA1_FIFO_DEPTH_SELECT_REG_NUM          1
+#define IGA1_FIFO_THRESHOLD_REG_NUM             2
+#define IGA1_FIFO_HIGH_THRESHOLD_REG_NUM        2
+#define IGA1_DISPLAY_QUEUE_EXPIRE_NUM_REG_NUM   1
+
+#define IGA2_FIFO_DEPTH_SELECT_REG_NUM          3
+#define IGA2_FIFO_THRESHOLD_REG_NUM             2
+#define IGA2_FIFO_HIGH_THRESHOLD_REG_NUM        2
+#define IGA2_DISPLAY_QUEUE_EXPIRE_NUM_REG_NUM   1
+
+#define IGA1_FIFO_DEPTH_SELECT_FORMULA(x)                   ((x/2)-1)
+#define IGA1_FIFO_THRESHOLD_FORMULA(x)                      (x/4)
+#define IGA1_DISPLAY_QUEUE_EXPIRE_NUM_FORMULA(x)            (x/4)
+#define IGA1_FIFO_HIGH_THRESHOLD_FORMULA(x)                 (x/4)
+#define IGA2_FIFO_DEPTH_SELECT_FORMULA(x)                   (((x/2)/4)-1)
+#define IGA2_FIFO_THRESHOLD_FORMULA(x)                      (x/4)
+#define IGA2_DISPLAY_QUEUE_EXPIRE_NUM_FORMULA(x)            (x/4)
+#define IGA2_FIFO_HIGH_THRESHOLD_FORMULA(x)                 (x/4)
+
+/************************************************************************/
+/*  LCD Timing                                                          */
+/************************************************************************/
+
+/* 500 ms = 500000 us */
+#define LCD_POWER_SEQ_TD0               500000
+/* 50 ms = 50000 us */
+#define LCD_POWER_SEQ_TD1               50000
+/* 0 us */
+#define LCD_POWER_SEQ_TD2               0
+/* 210 ms = 210000 us */
+#define LCD_POWER_SEQ_TD3               210000
+/* 2^10 * (1/14.31818M) = 71.475 us (K400.revA) */
+#define CLE266_POWER_SEQ_UNIT           71
+/* 2^11 * (1/14.31818M) = 142.95 us (K400.revB) */
+#define K800_POWER_SEQ_UNIT             142
+/* 2^13 * (1/14.31818M) = 572.1 us */
+#define P880_POWER_SEQ_UNIT             572
+
+#define CLE266_POWER_SEQ_FORMULA(x)     ((x)/CLE266_POWER_SEQ_UNIT)
+#define K800_POWER_SEQ_FORMULA(x)       ((x)/K800_POWER_SEQ_UNIT)
+#define P880_POWER_SEQ_FORMULA(x)       ((x)/P880_POWER_SEQ_UNIT)
+
+/* location: {CR8B,0,7},{CR8F,0,3} */
+#define LCD_POWER_SEQ_TD0_REG_NUM       2
+/* location: {CR8C,0,7},{CR8F,4,7} */
+#define LCD_POWER_SEQ_TD1_REG_NUM       2
+/* location: {CR8D,0,7},{CR90,0,3} */
+#define LCD_POWER_SEQ_TD2_REG_NUM       2
+/* location: {CR8E,0,7},{CR90,4,7} */
+#define LCD_POWER_SEQ_TD3_REG_NUM       2
+
+/* LCD Scaling factor*/
+/* x: indicate setting horizontal size*/
+/* y: indicate panel horizontal size*/
+
+/* Horizontal scaling factor 10 bits (2^10) */
+#define CLE266_LCD_HOR_SCF_FORMULA(x, y)   (((x-1)*1024)/(y-1))
+/* Vertical scaling factor 10 bits (2^10) */
+#define CLE266_LCD_VER_SCF_FORMULA(x, y)   (((x-1)*1024)/(y-1))
+/* Horizontal scaling factor 10 bits (2^12) */
+#define K800_LCD_HOR_SCF_FORMULA(x, y)     (((x-1)*4096)/(y-1))
+/* Vertical scaling factor 10 bits (2^11) */
+#define K800_LCD_VER_SCF_FORMULA(x, y)     (((x-1)*2048)/(y-1))
+
+/* location: {CR9F,0,1},{CR77,0,7},{CR79,4,5} */
+#define LCD_HOR_SCALING_FACTOR_REG_NUM  3
+/* location: {CR79,3,3},{CR78,0,7},{CR79,6,7} */
+#define LCD_VER_SCALING_FACTOR_REG_NUM  3
+/* location: {CR77,0,7},{CR79,4,5} */
+#define LCD_HOR_SCALING_FACTOR_REG_NUM_CLE  2
+/* location: {CR78,0,7},{CR79,6,7} */
+#define LCD_VER_SCALING_FACTOR_REG_NUM_CLE  2
+
+struct io_register {
+	u8 io_addr;
+	u8 start_bit;
+	u8 end_bit;
+};
+
+/*****************************************************
+**      Define IGA2 Shadow Display Timing         ****
+*****************************************************/
+
+/* IGA2 Shadow Horizontal Total */
+struct iga2_shadow_hor_total {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_HOR_TOTAL_REG_NUM];
+};
+
+/* IGA2 Shadow Horizontal Blank End */
+struct iga2_shadow_hor_blank_end {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_HOR_BLANK_END_REG_NUM];
+};
+
+/* IGA2 Shadow Vertical Total */
+struct iga2_shadow_ver_total {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_VER_TOTAL_REG_NUM];
+};
+
+/* IGA2 Shadow Vertical Addressable Video */
+struct iga2_shadow_ver_addr {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_VER_ADDR_REG_NUM];
+};
+
+/* IGA2 Shadow Vertical Blank Start */
+struct iga2_shadow_ver_blank_start {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_VER_BLANK_START_REG_NUM];
+};
+
+/* IGA2 Shadow Vertical Blank End */
+struct iga2_shadow_ver_blank_end {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_VER_BLANK_END_REG_NUM];
+};
+
+/* IGA2 Shadow Vertical Sync Start */
+struct iga2_shadow_ver_sync_start {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_VER_SYNC_START_REG_NUM];
+};
+
+/* IGA2 Shadow Vertical Sync End */
+struct iga2_shadow_ver_sync_end {
+	int reg_num;
+	struct io_register reg[IGA2_SHADOW_VER_SYNC_END_REG_NUM];
+};
+
+/* IGA1 Fetch Count Register */
+struct iga1_fetch_count {
+	int reg_num;
+	struct io_register reg[IGA1_FETCH_COUNT_REG_NUM];
+};
+
+/* IGA2 Fetch Count Register */
+struct iga2_fetch_count {
+	int reg_num;
+	struct io_register reg[IGA2_FETCH_COUNT_REG_NUM];
+};
+
+struct fetch_count {
+	struct iga1_fetch_count iga1_fetch_count_reg;
+	struct iga2_fetch_count iga2_fetch_count_reg;
+};
+
+/* Starting Address Register */
+struct iga1_starting_addr {
+	int reg_num;
+	struct io_register reg[IGA1_STARTING_ADDR_REG_NUM];
+};
+
+struct iga2_starting_addr {
+	int reg_num;
+	struct io_register reg[IGA2_STARTING_ADDR_REG_NUM];
+};
+
+struct starting_addr {
+	struct iga1_starting_addr iga1_starting_addr_reg;
+	struct iga2_starting_addr iga2_starting_addr_reg;
+};
+
+/* LCD Power Sequence Timer */
+struct lcd_pwd_seq_td0 {
+	int reg_num;
+	struct io_register reg[LCD_POWER_SEQ_TD0_REG_NUM];
+};
+
+struct lcd_pwd_seq_td1 {
+	int reg_num;
+	struct io_register reg[LCD_POWER_SEQ_TD1_REG_NUM];
+};
+
+struct lcd_pwd_seq_td2 {
+	int reg_num;
+	struct io_register reg[LCD_POWER_SEQ_TD2_REG_NUM];
+};
+
+struct lcd_pwd_seq_td3 {
+	int reg_num;
+	struct io_register reg[LCD_POWER_SEQ_TD3_REG_NUM];
+};
+
+struct _lcd_pwd_seq_timer {
+	struct lcd_pwd_seq_td0 td0;
+	struct lcd_pwd_seq_td1 td1;
+	struct lcd_pwd_seq_td2 td2;
+	struct lcd_pwd_seq_td3 td3;
+};
+
+/* LCD Scaling Factor */
+struct _lcd_hor_scaling_factor {
+	int reg_num;
+	struct io_register reg[LCD_HOR_SCALING_FACTOR_REG_NUM];
+};
+
+struct _lcd_ver_scaling_factor {
+	int reg_num;
+	struct io_register reg[LCD_VER_SCALING_FACTOR_REG_NUM];
+};
+
+struct _lcd_scaling_factor {
+	struct _lcd_hor_scaling_factor lcd_hor_scaling_factor;
+	struct _lcd_ver_scaling_factor lcd_ver_scaling_factor;
+};
+
+struct pll_limit {
+	u16 multiplier_min;
+	u16 multiplier_max;
+	u8 divisor;
+	u8 rshift;
+};
+
+struct rgbLUT {
+	u8 red;
+	u8 green;
+	u8 blue;
+};
+
+struct lcd_pwd_seq_timer {
+	u16 td0;
+	u16 td1;
+	u16 td2;
+	u16 td3;
+};
+
+/* Display FIFO Relation Registers*/
+struct iga1_fifo_depth_select {
+	int reg_num;
+	struct io_register reg[IGA1_FIFO_DEPTH_SELECT_REG_NUM];
+};
+
+struct iga1_fifo_threshold_select {
+	int reg_num;
+	struct io_register reg[IGA1_FIFO_THRESHOLD_REG_NUM];
+};
+
+struct iga1_fifo_high_threshold_select {
+	int reg_num;
+	struct io_register reg[IGA1_FIFO_HIGH_THRESHOLD_REG_NUM];
+};
+
+struct iga1_display_queue_expire_num {
+	int reg_num;
+	struct io_register reg[IGA1_DISPLAY_QUEUE_EXPIRE_NUM_REG_NUM];
+};
+
+struct iga2_fifo_depth_select {
+	int reg_num;
+	struct io_register reg[IGA2_FIFO_DEPTH_SELECT_REG_NUM];
+};
+
+struct iga2_fifo_threshold_select {
+	int reg_num;
+	struct io_register reg[IGA2_FIFO_THRESHOLD_REG_NUM];
+};
+
+struct iga2_fifo_high_threshold_select {
+	int reg_num;
+	struct io_register reg[IGA2_FIFO_HIGH_THRESHOLD_REG_NUM];
+};
+
+struct iga2_display_queue_expire_num {
+	int reg_num;
+	struct io_register reg[IGA2_DISPLAY_QUEUE_EXPIRE_NUM_REG_NUM];
+};
+
+struct fifo_depth_select {
+	struct iga1_fifo_depth_select iga1_fifo_depth_select_reg;
+	struct iga2_fifo_depth_select iga2_fifo_depth_select_reg;
+};
+
+struct fifo_threshold_select {
+	struct iga1_fifo_threshold_select iga1_fifo_threshold_select_reg;
+	struct iga2_fifo_threshold_select iga2_fifo_threshold_select_reg;
+};
+
+struct fifo_high_threshold_select {
+	struct iga1_fifo_high_threshold_select
+	 iga1_fifo_high_threshold_select_reg;
+	struct iga2_fifo_high_threshold_select
+	 iga2_fifo_high_threshold_select_reg;
+};
+
+struct display_queue_expire_num {
+	struct iga1_display_queue_expire_num
+	 iga1_display_queue_expire_num_reg;
+	struct iga2_display_queue_expire_num
+	 iga2_display_queue_expire_num_reg;
+};
+
+struct iga2_shadow_crtc_timing {
+	struct iga2_shadow_hor_total hor_total_shadow;
+	struct iga2_shadow_hor_blank_end hor_blank_end_shadow;
+	struct iga2_shadow_ver_total ver_total_shadow;
+	struct iga2_shadow_ver_addr ver_addr_shadow;
+	struct iga2_shadow_ver_blank_start ver_blank_start_shadow;
+	struct iga2_shadow_ver_blank_end ver_blank_end_shadow;
+	struct iga2_shadow_ver_sync_start ver_sync_start_shadow;
+	struct iga2_shadow_ver_sync_end ver_sync_end_shadow;
+};
+
+/* device ID */
+#define CLE266_FUNCTION3    0x3123
+#define KM400_FUNCTION3     0x3205
+#define CN400_FUNCTION2     0x2259
+#define CN400_FUNCTION3     0x3259
+/* support VT3314 chipset */
+#define CN700_FUNCTION2     0x2314
+#define CN700_FUNCTION3     0x3208
+/* VT3324 chipset */
+#define CX700_FUNCTION2     0x2324
+#define CX700_FUNCTION3     0x3324
+/* VT3204 chipset*/
+#define KM800_FUNCTION3      0x3204
+/* VT3336 chipset*/
+#define KM890_FUNCTION3      0x3336
+/* VT3327 chipset*/
+#define P4M890_FUNCTION3     0x3327
+/* VT3293 chipset*/
+#define CN750_FUNCTION3     0x3208
+/* VT3364 chipset*/
+#define P4M900_FUNCTION3    0x3364
+/* VT3353 chipset*/
+#define VX800_FUNCTION3     0x3353
+/* VT3409 chipset*/
+#define VX855_FUNCTION3     0x3409
+/* VT3410 chipset*/
+#define VX900_FUNCTION3     0x3410
+
+struct IODATA {
+	u8 Index;
+	u8 Mask;
+	u8 Data;
+};
+
+struct pci_device_id_info {
+	u32 vendor;
+	u32 device;
+	u32 chip_index;
+};
+
+struct via_device_mapping {
+	u32 device;
+	const char *name;
+};
+
+extern int viafb_SAMM_ON;
+extern int viafb_dual_fb;
+extern int viafb_LCD2_ON;
+extern int viafb_LCD_ON;
+extern int viafb_DVI_ON;
+extern int viafb_hotplug;
+
+struct via_display_timing var_to_timing(const struct fb_var_screeninfo *var,
+	u16 cxres, u16 cyres);
+void viafb_fill_crtc_timing(const struct fb_var_screeninfo *var,
+	u16 cxres, u16 cyres, int iga);
+void viafb_set_vclock(u32 CLK, int set_iga);
+void viafb_load_reg(int timing_value, int viafb_load_reg_num,
+	struct io_register *reg,
+	      int io_type);
+void via_set_source(u32 devices, u8 iga);
+void via_set_state(u32 devices, u8 state);
+void via_set_sync_polarity(u32 devices, u8 polarity);
+u32 via_parse_odev(char *input, char **end);
+void via_odev_to_seq(struct seq_file *m, u32 odev);
+void init_ad9389(void);
+/* Access I/O Function */
+void viafb_lock_crt(void);
+void viafb_unlock_crt(void);
+void viafb_load_fetch_count_reg(int h_addr, int bpp_byte, int set_iga);
+void viafb_write_regx(struct io_reg RegTable[], int ItemNum);
+void viafb_load_FIFO_reg(int set_iga, int hor_active, int ver_active);
+void viafb_set_dpa_gfx(int output_interface, struct GFX_DPA_SETTING\
+					*p_gfx_dpa_setting);
+
+int viafb_setmode(void);
+void viafb_fill_var_timing_info(struct fb_var_screeninfo *var,
+	const struct fb_videomode *mode);
+void viafb_init_chip_info(int chip_type);
+void viafb_init_dac(int set_iga);
+int viafb_get_refresh(int hres, int vres, u32 float_refresh);
+void viafb_update_device_setting(int hres, int vres, int bpp, int flag);
+
+void viafb_set_iga_path(void);
+void viafb_set_primary_color_register(u8 index, u8 red, u8 green, u8 blue);
+void viafb_set_secondary_color_register(u8 index, u8 red, u8 green, u8 blue);
+void viafb_get_fb_info(unsigned int *fb_base, unsigned int *fb_len);
+
+#endif /* __HW_H__ */
diff --git a/drivers/video/fbdev/via/ioctl.c b/drivers/video/fbdev/via/ioctl.c
new file mode 100644
index 0000000000..8b7f765538
--- /dev/null
+++ b/drivers/video/fbdev/via/ioctl.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include "global.h"
+
+int viafb_ioctl_get_viafb_info(u_long arg)
+{
+	struct viafb_ioctl_info viainfo;
+
+	memset(&viainfo, 0, sizeof(struct viafb_ioctl_info));
+
+	viainfo.viafb_id = VIAID;
+	viainfo.vendor_id = PCI_VIA_VENDOR_ID;
+
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_CLE266:
+		viainfo.device_id = UNICHROME_CLE266_DID;
+		break;
+
+	case UNICHROME_K400:
+		viainfo.device_id = UNICHROME_K400_DID;
+		break;
+
+	case UNICHROME_K800:
+		viainfo.device_id = UNICHROME_K800_DID;
+		break;
+
+	case UNICHROME_PM800:
+		viainfo.device_id = UNICHROME_PM800_DID;
+		break;
+
+	case UNICHROME_CN700:
+		viainfo.device_id = UNICHROME_CN700_DID;
+		break;
+
+	case UNICHROME_CX700:
+		viainfo.device_id = UNICHROME_CX700_DID;
+		break;
+
+	case UNICHROME_K8M890:
+		viainfo.device_id = UNICHROME_K8M890_DID;
+		break;
+
+	case UNICHROME_P4M890:
+		viainfo.device_id = UNICHROME_P4M890_DID;
+		break;
+
+	case UNICHROME_P4M900:
+		viainfo.device_id = UNICHROME_P4M900_DID;
+		break;
+	}
+
+	viainfo.version = VERSION_MAJOR;
+	viainfo.revision = VERSION_MINOR;
+
+	if (copy_to_user((void __user *)arg, &viainfo, sizeof(viainfo)))
+		return -EFAULT;
+
+	return 0;
+}
+
+/* Hot-Plug Priority: DVI > CRT*/
+int viafb_ioctl_hotplug(int hres, int vres, int bpp)
+{
+	int DVIsense, status = 0;
+	DEBUG_MSG(KERN_INFO "viafb_ioctl_hotplug!!\n");
+
+	if (viaparinfo->chip_info->tmds_chip_info.tmds_chip_name !=
+		NON_TMDS_TRANSMITTER) {
+		DVIsense = viafb_dvi_sense();
+
+		if (DVIsense) {
+			DEBUG_MSG(KERN_INFO "DVI Attached...\n");
+			if (viafb_DeviceStatus != DVI_Device) {
+				viafb_DVI_ON = 1;
+				viafb_CRT_ON = 0;
+				viafb_LCD_ON = 0;
+				viafb_DeviceStatus = DVI_Device;
+				viafb_set_iga_path();
+				return viafb_DeviceStatus;
+			}
+			status = 1;
+		} else
+			DEBUG_MSG(KERN_INFO "DVI De-attached...\n");
+	}
+
+	if ((viafb_DeviceStatus != CRT_Device) && (status == 0)) {
+		viafb_CRT_ON = 1;
+		viafb_DVI_ON = 0;
+		viafb_LCD_ON = 0;
+
+		viafb_DeviceStatus = CRT_Device;
+		viafb_set_iga_path();
+		return viafb_DeviceStatus;
+	}
+
+	return 0;
+}
diff --git a/drivers/video/fbdev/via/ioctl.h b/drivers/video/fbdev/via/ioctl.h
new file mode 100644
index 0000000000..fc7ceeb5f1
--- /dev/null
+++ b/drivers/video/fbdev/via/ioctl.h
@@ -0,0 +1,189 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __IOCTL_H__
+#define __IOCTL_H__
+
+#ifndef __user
+#define __user
+#endif
+
+/* VIAFB IOCTL definition */
+#define VIAFB_GET_INFO_SIZE		0x56494101	/* 'VIA\01' */
+#define VIAFB_GET_INFO			0x56494102	/* 'VIA\02' */
+#define VIAFB_HOTPLUG			0x56494103	/* 'VIA\03' */
+#define VIAFB_SET_HOTPLUG_FLAG		0x56494104	/* 'VIA\04' */
+#define VIAFB_GET_RESOLUTION		0x56494105	/* 'VIA\05' */
+#define VIAFB_GET_SAMM_INFO		0x56494107	/* 'VIA\07' */
+#define VIAFB_TURN_ON_OUTPUT_DEVICE     0x56494108	/* 'VIA\08' */
+#define VIAFB_TURN_OFF_OUTPUT_DEVICE    0x56494109	/* 'VIA\09' */
+#define VIAFB_GET_DEVICE		0x5649410B
+#define VIAFB_GET_DRIVER_VERSION	0x56494112	/* 'VIA\12' */
+#define VIAFB_GET_CHIP_INFO		0x56494113	/* 'VIA\13' */
+#define VIAFB_GET_DEVICE_INFO           0x56494115
+
+#define VIAFB_GET_DEVICE_SUPPORT	0x56494118
+#define VIAFB_GET_DEVICE_CONNECT	0x56494119
+#define VIAFB_GET_PANEL_SUPPORT_EXPAND	0x5649411A
+#define VIAFB_GET_DRIVER_NAME		0x56494122
+#define VIAFB_GET_DEVICE_SUPPORT_STATE	0x56494123
+#define VIAFB_GET_GAMMA_LUT		0x56494124
+#define VIAFB_SET_GAMMA_LUT		0x56494125
+#define VIAFB_GET_GAMMA_SUPPORT_STATE	0x56494126
+#define VIAFB_SYNC_SURFACE		0x56494130
+#define VIAFB_GET_DRIVER_CAPS		0x56494131
+#define VIAFB_GET_IGA_SCALING_INFO	0x56494132
+#define VIAFB_GET_PANEL_MAX_SIZE	0x56494133
+#define VIAFB_GET_PANEL_MAX_POSITION	0x56494134
+#define VIAFB_SET_PANEL_SIZE		0x56494135
+#define VIAFB_SET_PANEL_POSITION        0x56494136
+#define VIAFB_GET_PANEL_POSITION        0x56494137
+#define VIAFB_GET_PANEL_SIZE		0x56494138
+
+#define None_Device 0x00
+#define CRT_Device  0x01
+#define LCD_Device  0x02
+#define DVI_Device  0x08
+#define CRT2_Device 0x10
+#define LCD2_Device 0x40
+
+#define OP_LCD_CENTERING   0x01
+#define OP_LCD_PANEL_ID    0x02
+#define OP_LCD_MODE        0x03
+
+/*SAMM operation flag*/
+#define OP_SAMM            0x80
+
+#define LCD_PANEL_ID_MAXIMUM	23
+
+#define STATE_ON            0x1
+#define STATE_OFF           0x0
+#define STATE_DEFAULT       0xFFFF
+
+#define MAX_ACTIVE_DEV_NUM  2
+
+struct device_t {
+	unsigned short crt:1;
+	unsigned short dvi:1;
+	unsigned short lcd:1;
+	unsigned short samm:1;
+	unsigned short lcd_dsp_cent:1;
+	unsigned char lcd_mode:1;
+	unsigned short epia_dvi:1;
+	unsigned short lcd_dual_edge:1;
+	unsigned short lcd2:1;
+
+	unsigned short primary_dev;
+	unsigned char lcd_panel_id;
+	unsigned short xres, yres;
+	unsigned short xres1, yres1;
+	unsigned short refresh;
+	unsigned short bpp;
+	unsigned short refresh1;
+	unsigned short bpp1;
+	unsigned short sequence;
+	unsigned short bus_width;
+};
+
+struct viafb_ioctl_info {
+	u32 viafb_id;		/* for identifying viafb */
+#define VIAID       0x56494146	/* Identify myself with 'VIAF' */
+	u16 vendor_id;
+	u16 device_id;
+	u8 version;
+	u8 revision;
+	u8 reserved[246];	/* for future use */
+};
+
+struct viafb_ioctl_mode {
+	u32 xres;
+	u32 yres;
+	u32 refresh;
+	u32 bpp;
+	u32 xres_sec;
+	u32 yres_sec;
+	u32 virtual_xres_sec;
+	u32 virtual_yres_sec;
+	u32 refresh_sec;
+	u32 bpp_sec;
+};
+struct viafb_ioctl_samm {
+	u32 samm_status;
+	u32 size_prim;
+	u32 size_sec;
+	u32 mem_base;
+	u32 offset_sec;
+};
+
+struct viafb_driver_version {
+	int iMajorNum;
+	int iKernelNum;
+	int iOSNum;
+	int iMinorNum;
+};
+
+struct viafb_ioctl_lcd_attribute {
+	unsigned int panel_id;
+	unsigned int display_center;
+	unsigned int lcd_mode;
+};
+
+struct viafb_ioctl_setting {
+	/* Enable or disable active devices */
+	unsigned short device_flag;
+	/* Indicate which device should be turn on or turn off. */
+	unsigned short device_status;
+	unsigned int reserved;
+	/* Indicate which LCD's attribute can be changed. */
+	unsigned short lcd_operation_flag;
+	/* 1: SAMM ON  0: SAMM OFF */
+	unsigned short samm_status;
+	/* horizontal resolution of first device */
+	unsigned short first_dev_hor_res;
+	/* vertical resolution of first device */
+	unsigned short first_dev_ver_res;
+	/* horizontal resolution of second device */
+	unsigned short second_dev_hor_res;
+	/* vertical resolution of second device */
+	unsigned short second_dev_ver_res;
+	/* refresh rate of first device */
+	unsigned short first_dev_refresh;
+	/* bpp of first device */
+	unsigned short first_dev_bpp;
+	/* refresh rate of second device */
+	unsigned short second_dev_refresh;
+	/* bpp of second device */
+	unsigned short second_dev_bpp;
+	/* Indicate which device are primary display device. */
+	unsigned int primary_device;
+	unsigned int struct_reserved[35];
+	struct viafb_ioctl_lcd_attribute lcd_attributes;
+};
+
+struct _UTFunctionCaps {
+	unsigned int dw3DScalingState;
+	unsigned int reserved[31];
+};
+
+struct _POSITIONVALUE {
+	unsigned int dwX;
+	unsigned int dwY;
+};
+
+struct _panel_size_pos_info {
+	unsigned int device_type;
+	int x;
+	int y;
+};
+
+extern int viafb_LCD_ON;
+extern int viafb_DVI_ON;
+
+int viafb_ioctl_get_viafb_info(u_long arg);
+int viafb_ioctl_hotplug(int hres, int vres, int bpp);
+
+#endif /* __IOCTL_H__ */
diff --git a/drivers/video/fbdev/via/lcd.c b/drivers/video/fbdev/via/lcd.c
new file mode 100644
index 0000000000..beec5c8d4d
--- /dev/null
+++ b/drivers/video/fbdev/via/lcd.c
@@ -0,0 +1,990 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+#include "global.h"
+
+#define viafb_compact_res(x, y) (((x)<<16)|(y))
+
+/* CLE266 Software Power Sequence */
+/* {Mask}, {Data}, {Delay} */
+static const int PowerSequenceOn[3][3] = {
+	{0x10, 0x08, 0x06}, {0x10, 0x08, 0x06},	{0x19, 0x1FE, 0x01}
+};
+static const int PowerSequenceOff[3][3] = {
+	{0x06, 0x08, 0x10}, {0x00, 0x00, 0x00},	{0xD2, 0x19, 0x01}
+};
+
+static struct _lcd_scaling_factor lcd_scaling_factor = {
+	/* LCD Horizontal Scaling Factor Register */
+	{LCD_HOR_SCALING_FACTOR_REG_NUM,
+	 {{CR9F, 0, 1}, {CR77, 0, 7}, {CR79, 4, 5} } },
+	/* LCD Vertical Scaling Factor Register */
+	{LCD_VER_SCALING_FACTOR_REG_NUM,
+	 {{CR79, 3, 3}, {CR78, 0, 7}, {CR79, 6, 7} } }
+};
+static struct _lcd_scaling_factor lcd_scaling_factor_CLE = {
+	/* LCD Horizontal Scaling Factor Register */
+	{LCD_HOR_SCALING_FACTOR_REG_NUM_CLE, {{CR77, 0, 7}, {CR79, 4, 5} } },
+	/* LCD Vertical Scaling Factor Register */
+	{LCD_VER_SCALING_FACTOR_REG_NUM_CLE, {{CR78, 0, 7}, {CR79, 6, 7} } }
+};
+
+static bool lvds_identify_integratedlvds(void);
+static void fp_id_to_vindex(int panel_id);
+static int lvds_register_read(int index);
+static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
+		      int panel_vres);
+static void lcd_patch_skew_dvp0(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info);
+static void lcd_patch_skew_dvp1(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info);
+static void lcd_patch_skew(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info);
+
+static void integrated_lvds_disable(struct lvds_setting_information
+			     *plvds_setting_info,
+			     struct lvds_chip_information *plvds_chip_info);
+static void integrated_lvds_enable(struct lvds_setting_information
+			    *plvds_setting_info,
+			    struct lvds_chip_information *plvds_chip_info);
+static void lcd_powersequence_off(void);
+static void lcd_powersequence_on(void);
+static void fill_lcd_format(void);
+static void check_diport_of_integrated_lvds(
+	struct lvds_chip_information *plvds_chip_info,
+				     struct lvds_setting_information
+				     *plvds_setting_info);
+
+static inline bool check_lvds_chip(int device_id_subaddr, int device_id)
+{
+	return lvds_register_read(device_id_subaddr) == device_id;
+}
+
+void viafb_init_lcd_size(void)
+{
+	DEBUG_MSG(KERN_INFO "viafb_init_lcd_size()\n");
+
+	fp_id_to_vindex(viafb_lcd_panel_id);
+	viaparinfo->lvds_setting_info2->lcd_panel_hres =
+		viaparinfo->lvds_setting_info->lcd_panel_hres;
+	viaparinfo->lvds_setting_info2->lcd_panel_vres =
+		viaparinfo->lvds_setting_info->lcd_panel_vres;
+	viaparinfo->lvds_setting_info2->device_lcd_dualedge =
+	    viaparinfo->lvds_setting_info->device_lcd_dualedge;
+	viaparinfo->lvds_setting_info2->LCDDithering =
+		viaparinfo->lvds_setting_info->LCDDithering;
+}
+
+static bool lvds_identify_integratedlvds(void)
+{
+	if (viafb_display_hardware_layout == HW_LAYOUT_LCD_EXTERNAL_LCD2) {
+		/* Two dual channel LCD (Internal LVDS + External LVDS): */
+		/* If we have an external LVDS, such as VT1636, we should
+		   have its chip ID already. */
+		if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
+			    INTEGRATED_LVDS;
+			DEBUG_MSG(KERN_INFO "Support two dual channel LVDS! "
+				  "(Internal LVDS + External LVDS)\n");
+		} else {
+			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+			    INTEGRATED_LVDS;
+			DEBUG_MSG(KERN_INFO "Not found external LVDS, "
+				  "so can't support two dual channel LVDS!\n");
+		}
+	} else if (viafb_display_hardware_layout == HW_LAYOUT_LCD1_LCD2) {
+		/* Two single channel LCD (Internal LVDS + Internal LVDS): */
+		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+		INTEGRATED_LVDS;
+		viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
+			INTEGRATED_LVDS;
+		DEBUG_MSG(KERN_INFO "Support two single channel LVDS! "
+			  "(Internal LVDS + Internal LVDS)\n");
+	} else if (viafb_display_hardware_layout != HW_LAYOUT_DVI_ONLY) {
+		/* If we have found external LVDS, just use it,
+		   otherwise, we will use internal LVDS as default. */
+		if (!viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+			    INTEGRATED_LVDS;
+			DEBUG_MSG(KERN_INFO "Found Integrated LVDS!\n");
+		}
+	} else {
+		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+			NON_LVDS_TRANSMITTER;
+		DEBUG_MSG(KERN_INFO "Do not support LVDS!\n");
+		return false;
+	}
+
+	return true;
+}
+
+bool viafb_lvds_trasmitter_identify(void)
+{
+	if (viafb_lvds_identify_vt1636(VIA_PORT_31)) {
+		viaparinfo->chip_info->lvds_chip_info.i2c_port = VIA_PORT_31;
+		DEBUG_MSG(KERN_INFO
+			  "Found VIA VT1636 LVDS on port i2c 0x31\n");
+	} else {
+		if (viafb_lvds_identify_vt1636(VIA_PORT_2C)) {
+			viaparinfo->chip_info->lvds_chip_info.i2c_port =
+				VIA_PORT_2C;
+			DEBUG_MSG(KERN_INFO
+				  "Found VIA VT1636 LVDS on port gpio 0x2c\n");
+		}
+	}
+
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700)
+		lvds_identify_integratedlvds();
+
+	if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
+		return true;
+	/* Check for VT1631: */
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name = VT1631_LVDS;
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
+		VT1631_LVDS_I2C_ADDR;
+
+	if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID)) {
+		DEBUG_MSG(KERN_INFO "\n VT1631 LVDS ! \n");
+		DEBUG_MSG(KERN_INFO "\n %2d",
+			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
+		DEBUG_MSG(KERN_INFO "\n %2d",
+			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
+		return true;
+	}
+
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+		NON_LVDS_TRANSMITTER;
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
+		VT1631_LVDS_I2C_ADDR;
+	return false;
+}
+
+static void fp_id_to_vindex(int panel_id)
+{
+	DEBUG_MSG(KERN_INFO "fp_get_panel_id()\n");
+
+	if (panel_id > LCD_PANEL_ID_MAXIMUM)
+		viafb_lcd_panel_id = panel_id =
+		viafb_read_reg(VIACR, CR3F) & 0x0F;
+
+	switch (panel_id) {
+	case 0x0:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 640;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x1:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x2:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x3:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x4:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x5:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x6:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x8:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x9:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0xA:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0xB:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0xC:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0xD:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0xE:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0xF:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0x10:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1366;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0x11:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x12:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x13:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 800;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x14:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1360;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0x15:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	case 0x16:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 480;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 640;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+		break;
+	case 0x17:
+		/* OLPC XO-1.5 panel */
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 1200;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 900;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 0;
+		break;
+	default:
+		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
+		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
+		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
+		viaparinfo->lvds_setting_info->LCDDithering = 1;
+	}
+}
+
+static int lvds_register_read(int index)
+{
+	u8 data;
+
+	viafb_i2c_readbyte(VIA_PORT_2C,
+			(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
+			(u8) index, &data);
+	return data;
+}
+
+static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
+		      int panel_vres)
+{
+	int reg_value = 0;
+	int viafb_load_reg_num;
+	struct io_register *reg = NULL;
+
+	DEBUG_MSG(KERN_INFO "load_lcd_scaling()!!\n");
+
+	/* LCD Scaling Enable */
+	viafb_write_reg_mask(CR79, VIACR, 0x07, BIT0 + BIT1 + BIT2);
+
+	/* Check if expansion for horizontal */
+	if (set_hres < panel_hres) {
+		/* Load Horizontal Scaling Factor */
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_CLE266:
+		case UNICHROME_K400:
+			reg_value =
+			    CLE266_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
+			viafb_load_reg_num =
+			    lcd_scaling_factor_CLE.lcd_hor_scaling_factor.
+			    reg_num;
+			reg = lcd_scaling_factor_CLE.lcd_hor_scaling_factor.reg;
+			viafb_load_reg(reg_value,
+				viafb_load_reg_num, reg, VIACR);
+			break;
+		case UNICHROME_K800:
+		case UNICHROME_PM800:
+		case UNICHROME_CN700:
+		case UNICHROME_CX700:
+		case UNICHROME_K8M890:
+		case UNICHROME_P4M890:
+		case UNICHROME_P4M900:
+		case UNICHROME_CN750:
+		case UNICHROME_VX800:
+		case UNICHROME_VX855:
+		case UNICHROME_VX900:
+			reg_value =
+			    K800_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
+			/* Horizontal scaling enabled */
+			viafb_write_reg_mask(CRA2, VIACR, 0xC0, BIT7 + BIT6);
+			viafb_load_reg_num =
+			    lcd_scaling_factor.lcd_hor_scaling_factor.reg_num;
+			reg = lcd_scaling_factor.lcd_hor_scaling_factor.reg;
+			viafb_load_reg(reg_value,
+				viafb_load_reg_num, reg, VIACR);
+			break;
+		}
+
+		DEBUG_MSG(KERN_INFO "Horizontal Scaling value = %d", reg_value);
+	} else {
+		/* Horizontal scaling disabled */
+		viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT7);
+	}
+
+	/* Check if expansion for vertical */
+	if (set_vres < panel_vres) {
+		/* Load Vertical Scaling Factor */
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_CLE266:
+		case UNICHROME_K400:
+			reg_value =
+			    CLE266_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
+			viafb_load_reg_num =
+			    lcd_scaling_factor_CLE.lcd_ver_scaling_factor.
+			    reg_num;
+			reg = lcd_scaling_factor_CLE.lcd_ver_scaling_factor.reg;
+			viafb_load_reg(reg_value,
+				viafb_load_reg_num, reg, VIACR);
+			break;
+		case UNICHROME_K800:
+		case UNICHROME_PM800:
+		case UNICHROME_CN700:
+		case UNICHROME_CX700:
+		case UNICHROME_K8M890:
+		case UNICHROME_P4M890:
+		case UNICHROME_P4M900:
+		case UNICHROME_CN750:
+		case UNICHROME_VX800:
+		case UNICHROME_VX855:
+		case UNICHROME_VX900:
+			reg_value =
+			    K800_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
+			/* Vertical scaling enabled */
+			viafb_write_reg_mask(CRA2, VIACR, 0x08, BIT3);
+			viafb_load_reg_num =
+			    lcd_scaling_factor.lcd_ver_scaling_factor.reg_num;
+			reg = lcd_scaling_factor.lcd_ver_scaling_factor.reg;
+			viafb_load_reg(reg_value,
+				viafb_load_reg_num, reg, VIACR);
+			break;
+		}
+
+		DEBUG_MSG(KERN_INFO "Vertical Scaling value = %d", reg_value);
+	} else {
+		/* Vertical scaling disabled */
+		viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT3);
+	}
+}
+
+static void via_pitch_alignment_patch_lcd(int iga_path, int hres, int bpp)
+{
+	unsigned char cr13, cr35, cr65, cr66, cr67;
+	unsigned long dwScreenPitch = 0;
+	unsigned long dwPitch;
+
+	dwPitch = hres * (bpp >> 3);
+	if (dwPitch & 0x1F) {
+		dwScreenPitch = ((dwPitch + 31) & ~31) >> 3;
+		if (iga_path == IGA2) {
+			if (bpp > 8) {
+				cr66 = (unsigned char)(dwScreenPitch & 0xFF);
+				viafb_write_reg(CR66, VIACR, cr66);
+				cr67 = viafb_read_reg(VIACR, CR67) & 0xFC;
+				cr67 |=
+				    (unsigned
+				     char)((dwScreenPitch & 0x300) >> 8);
+				viafb_write_reg(CR67, VIACR, cr67);
+			}
+
+			/* Fetch Count */
+			cr67 = viafb_read_reg(VIACR, CR67) & 0xF3;
+			cr67 |= (unsigned char)((dwScreenPitch & 0x600) >> 7);
+			viafb_write_reg(CR67, VIACR, cr67);
+			cr65 = (unsigned char)((dwScreenPitch >> 1) & 0xFF);
+			cr65 += 2;
+			viafb_write_reg(CR65, VIACR, cr65);
+		} else {
+			if (bpp > 8) {
+				cr13 = (unsigned char)(dwScreenPitch & 0xFF);
+				viafb_write_reg(CR13, VIACR, cr13);
+				cr35 = viafb_read_reg(VIACR, CR35) & 0x1F;
+				cr35 |=
+				    (unsigned
+				     char)((dwScreenPitch & 0x700) >> 3);
+				viafb_write_reg(CR35, VIACR, cr35);
+			}
+		}
+	}
+}
+static void lcd_patch_skew_dvp0(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info)
+{
+	if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_P4M900:
+			viafb_vt1636_patch_skew_on_vt3364(plvds_setting_info,
+						    plvds_chip_info);
+			break;
+		case UNICHROME_P4M890:
+			viafb_vt1636_patch_skew_on_vt3327(plvds_setting_info,
+						    plvds_chip_info);
+			break;
+		}
+	}
+}
+static void lcd_patch_skew_dvp1(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info)
+{
+	if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_CX700:
+			viafb_vt1636_patch_skew_on_vt3324(plvds_setting_info,
+						    plvds_chip_info);
+			break;
+		}
+	}
+}
+static void lcd_patch_skew(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
+{
+	DEBUG_MSG(KERN_INFO "lcd_patch_skew\n");
+	switch (plvds_chip_info->output_interface) {
+	case INTERFACE_DVP0:
+		lcd_patch_skew_dvp0(plvds_setting_info, plvds_chip_info);
+		break;
+	case INTERFACE_DVP1:
+		lcd_patch_skew_dvp1(plvds_setting_info, plvds_chip_info);
+		break;
+	case INTERFACE_DFP_LOW:
+		if (UNICHROME_P4M900 == viaparinfo->chip_info->gfx_chip_name) {
+			viafb_write_reg_mask(CR99, VIACR, 0x08,
+				       BIT0 + BIT1 + BIT2 + BIT3);
+		}
+		break;
+	}
+}
+
+/* LCD Set Mode */
+void viafb_lcd_set_mode(const struct fb_var_screeninfo *var, u16 cxres,
+	u16 cyres, struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info)
+{
+	int set_iga = plvds_setting_info->iga_path;
+	int mode_bpp = var->bits_per_pixel;
+	int set_hres = cxres ? cxres : var->xres;
+	int set_vres = cyres ? cyres : var->yres;
+	int panel_hres = plvds_setting_info->lcd_panel_hres;
+	int panel_vres = plvds_setting_info->lcd_panel_vres;
+	u32 clock;
+	struct via_display_timing timing;
+	struct fb_var_screeninfo panel_var;
+	const struct fb_videomode *panel_crt_table;
+
+	DEBUG_MSG(KERN_INFO "viafb_lcd_set_mode!!\n");
+	/* Get panel table Pointer */
+	panel_crt_table = viafb_get_best_mode(panel_hres, panel_vres, 60);
+	viafb_fill_var_timing_info(&panel_var, panel_crt_table);
+	DEBUG_MSG(KERN_INFO "below viafb_lcd_set_mode!!\n");
+	if (VT1636_LVDS == plvds_chip_info->lvds_chip_name)
+		viafb_init_lvds_vt1636(plvds_setting_info, plvds_chip_info);
+	clock = PICOS2KHZ(panel_crt_table->pixclock) * 1000;
+	plvds_setting_info->vclk = clock;
+
+	if (set_iga == IGA2 && (set_hres < panel_hres || set_vres < panel_vres)
+		&& plvds_setting_info->display_method == LCD_EXPANDSION) {
+		timing = var_to_timing(&panel_var, panel_hres, panel_vres);
+		load_lcd_scaling(set_hres, set_vres, panel_hres, panel_vres);
+	} else {
+		timing = var_to_timing(&panel_var, set_hres, set_vres);
+		if (set_iga == IGA2)
+			/* disable scaling */
+			via_write_reg_mask(VIACR, 0x79, 0x00,
+				BIT0 + BIT1 + BIT2);
+	}
+
+	if (set_iga == IGA1)
+		via_set_primary_timing(&timing);
+	else if (set_iga == IGA2)
+		via_set_secondary_timing(&timing);
+
+	/* Fetch count for IGA2 only */
+	viafb_load_fetch_count_reg(set_hres, mode_bpp / 8, set_iga);
+
+	if ((viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
+		&& (viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400))
+		viafb_load_FIFO_reg(set_iga, set_hres, set_vres);
+
+	fill_lcd_format();
+	viafb_set_vclock(clock, set_iga);
+	lcd_patch_skew(plvds_setting_info, plvds_chip_info);
+
+	/* If K8M800, enable LCD Prefetch Mode. */
+	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800)
+	    || (UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name))
+		viafb_write_reg_mask(CR6A, VIACR, 0x01, BIT0);
+
+	/* Patch for non 32bit alignment mode */
+	via_pitch_alignment_patch_lcd(plvds_setting_info->iga_path, set_hres,
+		var->bits_per_pixel);
+}
+
+static void integrated_lvds_disable(struct lvds_setting_information
+			     *plvds_setting_info,
+			     struct lvds_chip_information *plvds_chip_info)
+{
+	bool turn_off_first_powersequence = false;
+	bool turn_off_second_powersequence = false;
+	if (INTERFACE_LVDS0LVDS1 == plvds_chip_info->output_interface)
+		turn_off_first_powersequence = true;
+	if (INTERFACE_LVDS0 == plvds_chip_info->output_interface)
+		turn_off_first_powersequence = true;
+	if (INTERFACE_LVDS1 == plvds_chip_info->output_interface)
+		turn_off_second_powersequence = true;
+	if (turn_off_second_powersequence) {
+		/* Use second power sequence control: */
+
+		/* Turn off power sequence. */
+		viafb_write_reg_mask(CRD4, VIACR, 0, BIT1);
+
+		/* Turn off back light. */
+		viafb_write_reg_mask(CRD3, VIACR, 0xC0, BIT6 + BIT7);
+	}
+	if (turn_off_first_powersequence) {
+		/* Use first power sequence control: */
+
+		/* Turn off power sequence. */
+		viafb_write_reg_mask(CR6A, VIACR, 0, BIT3);
+
+		/* Turn off back light. */
+		viafb_write_reg_mask(CR91, VIACR, 0xC0, BIT6 + BIT7);
+	}
+
+	/* Power off LVDS channel. */
+	switch (plvds_chip_info->output_interface) {
+	case INTERFACE_LVDS0:
+		{
+			viafb_write_reg_mask(CRD2, VIACR, 0x80, BIT7);
+			break;
+		}
+
+	case INTERFACE_LVDS1:
+		{
+			viafb_write_reg_mask(CRD2, VIACR, 0x40, BIT6);
+			break;
+		}
+
+	case INTERFACE_LVDS0LVDS1:
+		{
+			viafb_write_reg_mask(CRD2, VIACR, 0xC0, BIT6 + BIT7);
+			break;
+		}
+	}
+}
+
+static void integrated_lvds_enable(struct lvds_setting_information
+			    *plvds_setting_info,
+			    struct lvds_chip_information *plvds_chip_info)
+{
+	DEBUG_MSG(KERN_INFO "integrated_lvds_enable, out_interface:%d\n",
+		  plvds_chip_info->output_interface);
+	if (plvds_setting_info->lcd_mode == LCD_SPWG)
+		viafb_write_reg_mask(CRD2, VIACR, 0x00, BIT0 + BIT1);
+	else
+		viafb_write_reg_mask(CRD2, VIACR, 0x03, BIT0 + BIT1);
+
+	switch (plvds_chip_info->output_interface) {
+	case INTERFACE_LVDS0LVDS1:
+	case INTERFACE_LVDS0:
+		/* Use first power sequence control: */
+		/* Use hardware control power sequence. */
+		viafb_write_reg_mask(CR91, VIACR, 0, BIT0);
+		/* Turn on back light. */
+		viafb_write_reg_mask(CR91, VIACR, 0, BIT6 + BIT7);
+		/* Turn on hardware power sequence. */
+		viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
+		break;
+	case INTERFACE_LVDS1:
+		/* Use second power sequence control: */
+		/* Use hardware control power sequence. */
+		viafb_write_reg_mask(CRD3, VIACR, 0, BIT0);
+		/* Turn on back light. */
+		viafb_write_reg_mask(CRD3, VIACR, 0, BIT6 + BIT7);
+		/* Turn on hardware power sequence. */
+		viafb_write_reg_mask(CRD4, VIACR, 0x02, BIT1);
+		break;
+	}
+
+	/* Power on LVDS channel. */
+	switch (plvds_chip_info->output_interface) {
+	case INTERFACE_LVDS0:
+		{
+			viafb_write_reg_mask(CRD2, VIACR, 0, BIT7);
+			break;
+		}
+
+	case INTERFACE_LVDS1:
+		{
+			viafb_write_reg_mask(CRD2, VIACR, 0, BIT6);
+			break;
+		}
+
+	case INTERFACE_LVDS0LVDS1:
+		{
+			viafb_write_reg_mask(CRD2, VIACR, 0, BIT6 + BIT7);
+			break;
+		}
+	}
+}
+
+void viafb_lcd_disable(void)
+{
+
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
+		lcd_powersequence_off();
+		/* DI1 pad off */
+		viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
+	} else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
+		if (viafb_LCD2_ON
+		    && (INTEGRATED_LVDS ==
+			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
+			integrated_lvds_disable(viaparinfo->lvds_setting_info,
+				&viaparinfo->chip_info->lvds_chip_info2);
+		if (INTEGRATED_LVDS ==
+			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
+			integrated_lvds_disable(viaparinfo->lvds_setting_info,
+				&viaparinfo->chip_info->lvds_chip_info);
+		if (VT1636_LVDS == viaparinfo->chip_info->
+			lvds_chip_info.lvds_chip_name)
+			viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
+				&viaparinfo->chip_info->lvds_chip_info);
+	} else if (VT1636_LVDS ==
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+		viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
+				    &viaparinfo->chip_info->lvds_chip_info);
+	} else {
+		/* Backlight off           */
+		viafb_write_reg_mask(SR3D, VIASR, 0x00, 0x20);
+		/* 24 bit DI data paht off */
+		viafb_write_reg_mask(CR91, VIACR, 0x80, 0x80);
+	}
+
+	/* Disable expansion bit   */
+	viafb_write_reg_mask(CR79, VIACR, 0x00, 0x01);
+	/* Simultaneout disabled   */
+	viafb_write_reg_mask(CR6B, VIACR, 0x00, 0x08);
+}
+
+static void set_lcd_output_path(int set_iga, int output_interface)
+{
+	switch (output_interface) {
+	case INTERFACE_DFP:
+		if ((UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name)
+		    || (UNICHROME_P4M890 ==
+		    viaparinfo->chip_info->gfx_chip_name))
+			viafb_write_reg_mask(CR97, VIACR, 0x84,
+				       BIT7 + BIT2 + BIT1 + BIT0);
+		fallthrough;
+	case INTERFACE_DVP0:
+	case INTERFACE_DVP1:
+	case INTERFACE_DFP_HIGH:
+	case INTERFACE_DFP_LOW:
+		if (set_iga == IGA2)
+			viafb_write_reg(CR91, VIACR, 0x00);
+		break;
+	}
+}
+
+void viafb_lcd_enable(void)
+{
+	viafb_write_reg_mask(CR6B, VIACR, 0x00, BIT3);
+	viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
+	set_lcd_output_path(viaparinfo->lvds_setting_info->iga_path,
+		viaparinfo->chip_info->lvds_chip_info.output_interface);
+	if (viafb_LCD2_ON)
+		set_lcd_output_path(viaparinfo->lvds_setting_info2->iga_path,
+			viaparinfo->chip_info->
+			lvds_chip_info2.output_interface);
+
+	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
+		/* DI1 pad on */
+		viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
+		lcd_powersequence_on();
+	} else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
+		if (viafb_LCD2_ON && (INTEGRATED_LVDS ==
+			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
+			integrated_lvds_enable(viaparinfo->lvds_setting_info2, \
+				&viaparinfo->chip_info->lvds_chip_info2);
+		if (INTEGRATED_LVDS ==
+			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
+			integrated_lvds_enable(viaparinfo->lvds_setting_info,
+				&viaparinfo->chip_info->lvds_chip_info);
+		if (VT1636_LVDS == viaparinfo->chip_info->
+			lvds_chip_info.lvds_chip_name)
+			viafb_enable_lvds_vt1636(viaparinfo->
+			lvds_setting_info, &viaparinfo->chip_info->
+			lvds_chip_info);
+	} else if (VT1636_LVDS ==
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+		viafb_enable_lvds_vt1636(viaparinfo->lvds_setting_info,
+				   &viaparinfo->chip_info->lvds_chip_info);
+	} else {
+		/* Backlight on            */
+		viafb_write_reg_mask(SR3D, VIASR, 0x20, 0x20);
+		/* 24 bit DI data paht on  */
+		viafb_write_reg_mask(CR91, VIACR, 0x00, 0x80);
+		/* LCD enabled             */
+		viafb_write_reg_mask(CR6A, VIACR, 0x48, 0x48);
+	}
+}
+
+static void lcd_powersequence_off(void)
+{
+	int i, mask, data;
+
+	/* Software control power sequence */
+	viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);
+
+	for (i = 0; i < 3; i++) {
+		mask = PowerSequenceOff[0][i];
+		data = PowerSequenceOff[1][i] & mask;
+		viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
+		udelay(PowerSequenceOff[2][i]);
+	}
+
+	/* Disable LCD */
+	viafb_write_reg_mask(CR6A, VIACR, 0x00, 0x08);
+}
+
+static void lcd_powersequence_on(void)
+{
+	int i, mask, data;
+
+	/* Software control power sequence */
+	viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);
+
+	/* Enable LCD */
+	viafb_write_reg_mask(CR6A, VIACR, 0x08, 0x08);
+
+	for (i = 0; i < 3; i++) {
+		mask = PowerSequenceOn[0][i];
+		data = PowerSequenceOn[1][i] & mask;
+		viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
+		udelay(PowerSequenceOn[2][i]);
+	}
+
+	udelay(1);
+}
+
+static void fill_lcd_format(void)
+{
+	u8 bdithering = 0, bdual = 0;
+
+	if (viaparinfo->lvds_setting_info->device_lcd_dualedge)
+		bdual = BIT4;
+	if (viaparinfo->lvds_setting_info->LCDDithering)
+		bdithering = BIT0;
+	/* Dual & Dithering */
+	viafb_write_reg_mask(CR88, VIACR, (bdithering | bdual), BIT4 + BIT0);
+}
+
+static void check_diport_of_integrated_lvds(
+	struct lvds_chip_information *plvds_chip_info,
+				     struct lvds_setting_information
+				     *plvds_setting_info)
+{
+	/* Determine LCD DI Port by hardware layout. */
+	switch (viafb_display_hardware_layout) {
+	case HW_LAYOUT_LCD_ONLY:
+		{
+			if (plvds_setting_info->device_lcd_dualedge) {
+				plvds_chip_info->output_interface =
+				    INTERFACE_LVDS0LVDS1;
+			} else {
+				plvds_chip_info->output_interface =
+				    INTERFACE_LVDS0;
+			}
+
+			break;
+		}
+
+	case HW_LAYOUT_DVI_ONLY:
+		{
+			plvds_chip_info->output_interface = INTERFACE_NONE;
+			break;
+		}
+
+	case HW_LAYOUT_LCD1_LCD2:
+	case HW_LAYOUT_LCD_EXTERNAL_LCD2:
+		{
+			plvds_chip_info->output_interface =
+			    INTERFACE_LVDS0LVDS1;
+			break;
+		}
+
+	case HW_LAYOUT_LCD_DVI:
+		{
+			plvds_chip_info->output_interface = INTERFACE_LVDS1;
+			break;
+		}
+
+	default:
+		{
+			plvds_chip_info->output_interface = INTERFACE_LVDS1;
+			break;
+		}
+	}
+
+	DEBUG_MSG(KERN_INFO
+		  "Display Hardware Layout: 0x%x, LCD DI Port: 0x%x\n",
+		  viafb_display_hardware_layout,
+		  plvds_chip_info->output_interface);
+}
+
+void viafb_init_lvds_output_interface(struct lvds_chip_information
+				*plvds_chip_info,
+				struct lvds_setting_information
+				*plvds_setting_info)
+{
+	if (INTERFACE_NONE != plvds_chip_info->output_interface) {
+		/*Do nothing, lcd port is specified by module parameter */
+		return;
+	}
+
+	switch (plvds_chip_info->lvds_chip_name) {
+
+	case VT1636_LVDS:
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_CX700:
+			plvds_chip_info->output_interface = INTERFACE_DVP1;
+			break;
+		case UNICHROME_CN700:
+			plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
+			break;
+		default:
+			plvds_chip_info->output_interface = INTERFACE_DVP0;
+			break;
+		}
+		break;
+
+	case INTEGRATED_LVDS:
+		check_diport_of_integrated_lvds(plvds_chip_info,
+						plvds_setting_info);
+		break;
+
+	default:
+		switch (viaparinfo->chip_info->gfx_chip_name) {
+		case UNICHROME_K8M890:
+		case UNICHROME_P4M900:
+		case UNICHROME_P4M890:
+			plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
+			break;
+		default:
+			plvds_chip_info->output_interface = INTERFACE_DFP;
+			break;
+		}
+		break;
+	}
+}
+
+bool viafb_lcd_get_mobile_state(bool *mobile)
+{
+	unsigned char __iomem *romptr, *tableptr, *biosptr;
+	u8 core_base;
+	/* Rom address */
+	const u32 romaddr = 0x000C0000;
+	u16 start_pattern;
+
+	biosptr = ioremap(romaddr, 0x10000);
+	start_pattern = readw(biosptr);
+
+	/* Compare pattern */
+	if (start_pattern == 0xAA55) {
+		/* Get the start of Table */
+		/* 0x1B means BIOS offset position */
+		romptr = biosptr + 0x1B;
+		tableptr = biosptr + readw(romptr);
+
+		/* Get the start of biosver structure */
+		/* 18 means BIOS version position. */
+		romptr = tableptr + 18;
+		romptr = biosptr + readw(romptr);
+
+		/* The offset should be 44, but the
+		   actual image is less three char. */
+		/* pRom += 44; */
+		romptr += 41;
+
+		core_base = readb(romptr);
+
+		if (core_base & 0x8)
+			*mobile = false;
+		else
+			*mobile = true;
+		/* release memory */
+		iounmap(biosptr);
+
+		return true;
+	} else {
+		iounmap(biosptr);
+		return false;
+	}
+}
diff --git a/drivers/video/fbdev/via/lcd.h b/drivers/video/fbdev/via/lcd.h
new file mode 100644
index 0000000000..338da38de4
--- /dev/null
+++ b/drivers/video/fbdev/via/lcd.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#ifndef __LCD_H__
+#define __LCD_H__
+
+/*Definition TMDS Device ID register*/
+#define     VT1631_DEVICE_ID_REG        0x02
+#define     VT1631_DEVICE_ID            0x92
+
+#define     VT3271_DEVICE_ID_REG        0x02
+#define     VT3271_DEVICE_ID            0x71
+
+/* Definition DVI Panel ID*/
+/* Resolution: 640x480,   Channel: single, Dithering: Enable */
+#define     LCD_PANEL_ID0_640X480       0x00
+/* Resolution: 800x600,   Channel: single, Dithering: Enable */
+#define     LCD_PANEL_ID1_800X600       0x01
+/* Resolution: 1024x768,  Channel: single, Dithering: Enable */
+#define     LCD_PANEL_ID2_1024X768      0x02
+/* Resolution: 1280x768,  Channel: single, Dithering: Enable */
+#define     LCD_PANEL_ID3_1280X768      0x03
+/* Resolution: 1280x1024, Channel: dual,   Dithering: Enable */
+#define     LCD_PANEL_ID4_1280X1024     0x04
+/* Resolution: 1400x1050, Channel: dual,   Dithering: Enable */
+#define     LCD_PANEL_ID5_1400X1050     0x05
+/* Resolution: 1600x1200, Channel: dual,   Dithering: Enable */
+#define     LCD_PANEL_ID6_1600X1200     0x06
+/* Resolution: 1366x768,  Channel: single, Dithering: Disable */
+#define     LCD_PANEL_ID7_1366X768      0x07
+/* Resolution: 1024x600,  Channel: single, Dithering: Enable*/
+#define     LCD_PANEL_ID8_1024X600      0x08
+/* Resolution: 1280x800,  Channel: single, Dithering: Enable*/
+#define     LCD_PANEL_ID9_1280X800      0x09
+/* Resolution: 800x480,   Channel: single, Dithering: Enable*/
+#define     LCD_PANEL_IDA_800X480       0x0A
+/* Resolution: 1360x768,   Channel: single, Dithering: Disable*/
+#define     LCD_PANEL_IDB_1360X768     0x0B
+/* Resolution: 480x640,  Channel: single, Dithering: Enable */
+#define     LCD_PANEL_IDC_480X640      0x0C
+/* Resolution: 1200x900,  Channel: single, Dithering: Disable */
+#define     LCD_PANEL_IDD_1200X900      0x0D
+
+
+extern int viafb_LCD2_ON;
+extern int viafb_LCD_ON;
+extern int viafb_DVI_ON;
+
+void viafb_disable_lvds_vt1636(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info);
+void viafb_enable_lvds_vt1636(struct lvds_setting_information
+			*plvds_setting_info,
+			struct lvds_chip_information *plvds_chip_info);
+void viafb_lcd_disable(void);
+void viafb_lcd_enable(void);
+void viafb_init_lcd_size(void);
+void viafb_init_lvds_output_interface(struct lvds_chip_information
+				*plvds_chip_info,
+				struct lvds_setting_information
+				*plvds_setting_info);
+void viafb_lcd_set_mode(const struct fb_var_screeninfo *var, u16 cxres,
+	u16 cyres, struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info);
+bool viafb_lvds_trasmitter_identify(void);
+void viafb_init_lvds_output_interface(struct lvds_chip_information
+				*plvds_chip_info,
+				struct lvds_setting_information
+				*plvds_setting_info);
+bool viafb_lcd_get_mobile_state(bool *mobile);
+
+#endif /* __LCD_H__ */
diff --git a/drivers/video/fbdev/via/share.h b/drivers/video/fbdev/via/share.h
new file mode 100644
index 0000000000..0e4a954f90
--- /dev/null
+++ b/drivers/video/fbdev/via/share.h
@@ -0,0 +1,318 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __SHARE_H__
+#define __SHARE_H__
+
+#include "via_modesetting.h"
+
+/* Define Bit Field */
+#define BIT0    0x01
+#define BIT1    0x02
+#define BIT2    0x04
+#define BIT3    0x08
+#define BIT4    0x10
+#define BIT5    0x20
+#define BIT6    0x40
+#define BIT7    0x80
+
+/* Video Memory Size */
+#define VIDEO_MEMORY_SIZE_16M    0x1000000
+
+/*
+ * Lengths of the VPIT structure arrays.
+ */
+#define StdCR       0x19
+#define StdSR       0x04
+#define StdGR       0x09
+#define StdAR       0x14
+
+#define PatchCR     11
+
+/* Display path */
+#define IGA1        1
+#define IGA2        2
+
+/* Define Color Depth  */
+#define MODE_8BPP       1
+#define MODE_16BPP      2
+#define MODE_32BPP      4
+
+#define GR20    0x20
+#define GR21    0x21
+#define GR22    0x22
+
+/* Sequencer Registers */
+#define SR01    0x01
+#define SR10    0x10
+#define SR12    0x12
+#define SR15    0x15
+#define SR16    0x16
+#define SR17    0x17
+#define SR18    0x18
+#define SR1B    0x1B
+#define SR1A    0x1A
+#define SR1C    0x1C
+#define SR1D    0x1D
+#define SR1E    0x1E
+#define SR1F    0x1F
+#define SR20    0x20
+#define SR21    0x21
+#define SR22    0x22
+#define SR2A    0x2A
+#define SR2D    0x2D
+#define SR2E    0x2E
+
+#define SR30    0x30
+#define SR39    0x39
+#define SR3D    0x3D
+#define SR3E    0x3E
+#define SR3F    0x3F
+#define SR40    0x40
+#define SR43    0x43
+#define SR44    0x44
+#define SR45    0x45
+#define SR46    0x46
+#define SR47    0x47
+#define SR48    0x48
+#define SR49    0x49
+#define SR4A    0x4A
+#define SR4B    0x4B
+#define SR4C    0x4C
+#define SR52    0x52
+#define SR57	0x57
+#define SR58	0x58
+#define SR59	0x59
+#define SR5D    0x5D
+#define SR5E    0x5E
+#define SR65    0x65
+
+/* CRT Controller Registers */
+#define CR00    0x00
+#define CR01    0x01
+#define CR02    0x02
+#define CR03    0x03
+#define CR04    0x04
+#define CR05    0x05
+#define CR06    0x06
+#define CR07    0x07
+#define CR08    0x08
+#define CR09    0x09
+#define CR0A    0x0A
+#define CR0B    0x0B
+#define CR0C    0x0C
+#define CR0D    0x0D
+#define CR0E    0x0E
+#define CR0F    0x0F
+#define CR10    0x10
+#define CR11    0x11
+#define CR12    0x12
+#define CR13    0x13
+#define CR14    0x14
+#define CR15    0x15
+#define CR16    0x16
+#define CR17    0x17
+#define CR18    0x18
+
+/* Extend CRT Controller Registers */
+#define CR30    0x30
+#define CR31    0x31
+#define CR32    0x32
+#define CR33    0x33
+#define CR34    0x34
+#define CR35    0x35
+#define CR36    0x36
+#define CR37    0x37
+#define CR38    0x38
+#define CR39    0x39
+#define CR3A    0x3A
+#define CR3B    0x3B
+#define CR3C    0x3C
+#define CR3D    0x3D
+#define CR3E    0x3E
+#define CR3F    0x3F
+#define CR40    0x40
+#define CR41    0x41
+#define CR42    0x42
+#define CR43    0x43
+#define CR44    0x44
+#define CR45    0x45
+#define CR46    0x46
+#define CR47    0x47
+#define CR48    0x48
+#define CR49    0x49
+#define CR4A    0x4A
+#define CR4B    0x4B
+#define CR4C    0x4C
+#define CR4D    0x4D
+#define CR4E    0x4E
+#define CR4F    0x4F
+#define CR50    0x50
+#define CR51    0x51
+#define CR52    0x52
+#define CR53    0x53
+#define CR54    0x54
+#define CR55    0x55
+#define CR56    0x56
+#define CR57    0x57
+#define CR58    0x58
+#define CR59    0x59
+#define CR5A    0x5A
+#define CR5B    0x5B
+#define CR5C    0x5C
+#define CR5D    0x5D
+#define CR5E    0x5E
+#define CR5F    0x5F
+#define CR60    0x60
+#define CR61    0x61
+#define CR62    0x62
+#define CR63    0x63
+#define CR64    0x64
+#define CR65    0x65
+#define CR66    0x66
+#define CR67    0x67
+#define CR68    0x68
+#define CR69    0x69
+#define CR6A    0x6A
+#define CR6B    0x6B
+#define CR6C    0x6C
+#define CR6D    0x6D
+#define CR6E    0x6E
+#define CR6F    0x6F
+#define CR70    0x70
+#define CR71    0x71
+#define CR72    0x72
+#define CR73    0x73
+#define CR74    0x74
+#define CR75    0x75
+#define CR76    0x76
+#define CR77    0x77
+#define CR78    0x78
+#define CR79    0x79
+#define CR7A    0x7A
+#define CR7B    0x7B
+#define CR7C    0x7C
+#define CR7D    0x7D
+#define CR7E    0x7E
+#define CR7F    0x7F
+#define CR80    0x80
+#define CR81    0x81
+#define CR82    0x82
+#define CR83    0x83
+#define CR84    0x84
+#define CR85    0x85
+#define CR86    0x86
+#define CR87    0x87
+#define CR88    0x88
+#define CR89    0x89
+#define CR8A    0x8A
+#define CR8B    0x8B
+#define CR8C    0x8C
+#define CR8D    0x8D
+#define CR8E    0x8E
+#define CR8F    0x8F
+#define CR90    0x90
+#define CR91    0x91
+#define CR92    0x92
+#define CR93    0x93
+#define CR94    0x94
+#define CR95    0x95
+#define CR96    0x96
+#define CR97    0x97
+#define CR98    0x98
+#define CR99    0x99
+#define CR9A    0x9A
+#define CR9B    0x9B
+#define CR9C    0x9C
+#define CR9D    0x9D
+#define CR9E    0x9E
+#define CR9F    0x9F
+#define CRA0    0xA0
+#define CRA1    0xA1
+#define CRA2    0xA2
+#define CRA3    0xA3
+#define CRD2    0xD2
+#define CRD3    0xD3
+#define CRD4    0xD4
+
+/* LUT Table*/
+#define LUT_DATA             0x3C9	/* DACDATA */
+#define LUT_INDEX_READ       0x3C7	/* DACRX */
+#define LUT_INDEX_WRITE      0x3C8	/* DACWX */
+#define DACMASK              0x3C6
+
+/* Definition Device */
+#define DEVICE_CRT  0x01
+#define DEVICE_DVI  0x03
+#define DEVICE_LCD  0x04
+
+/* Device output interface */
+#define INTERFACE_NONE          0x00
+#define INTERFACE_ANALOG_RGB    0x01
+#define INTERFACE_DVP0          0x02
+#define INTERFACE_DVP1          0x03
+#define INTERFACE_DFP_HIGH      0x04
+#define INTERFACE_DFP_LOW       0x05
+#define INTERFACE_DFP           0x06
+#define INTERFACE_LVDS0         0x07
+#define INTERFACE_LVDS1         0x08
+#define INTERFACE_LVDS0LVDS1    0x09
+#define INTERFACE_TMDS          0x0A
+
+#define HW_LAYOUT_LCD_ONLY      0x01
+#define HW_LAYOUT_DVI_ONLY      0x02
+#define HW_LAYOUT_LCD_DVI       0x03
+#define HW_LAYOUT_LCD1_LCD2     0x04
+#define HW_LAYOUT_LCD_EXTERNAL_LCD2 0x10
+
+/* Definition CRTC Timing Index */
+#define H_TOTAL_INDEX               0
+#define H_ADDR_INDEX                1
+#define H_BLANK_START_INDEX         2
+#define H_BLANK_END_INDEX           3
+#define H_SYNC_START_INDEX          4
+#define H_SYNC_END_INDEX            5
+#define V_TOTAL_INDEX               6
+#define V_ADDR_INDEX                7
+#define V_BLANK_START_INDEX         8
+#define V_BLANK_END_INDEX           9
+#define V_SYNC_START_INDEX          10
+#define V_SYNC_END_INDEX            11
+#define H_TOTAL_SHADOW_INDEX        12
+#define H_BLANK_END_SHADOW_INDEX    13
+#define V_TOTAL_SHADOW_INDEX        14
+#define V_ADDR_SHADOW_INDEX         15
+#define V_BLANK_SATRT_SHADOW_INDEX  16
+#define V_BLANK_END_SHADOW_INDEX    17
+#define V_SYNC_SATRT_SHADOW_INDEX   18
+#define V_SYNC_END_SHADOW_INDEX     19
+
+/* LCD display method
+*/
+#define     LCD_EXPANDSION              0x00
+#define     LCD_CENTERING               0x01
+
+/* LCD mode
+*/
+#define     LCD_OPENLDI               0x00
+#define     LCD_SPWG                  0x01
+
+struct crt_mode_table {
+	int refresh_rate;
+	int h_sync_polarity;
+	int v_sync_polarity;
+	struct via_display_timing crtc;
+};
+
+struct io_reg {
+	int port;
+	u8 index;
+	u8 mask;
+	u8 value;
+};
+
+#endif /* __SHARE_H__ */
diff --git a/drivers/video/fbdev/via/tblDPASetting.c b/drivers/video/fbdev/via/tblDPASetting.c
new file mode 100644
index 0000000000..d7ff172f0a
--- /dev/null
+++ b/drivers/video/fbdev/via/tblDPASetting.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include "global.h"
+
+struct GFX_DPA_SETTING GFX_DPA_SETTING_TBL_VT3324[] = {
+/*  ClkRange, DVP0, DVP0DataDriving,  DVP0ClockDriving, DVP1,
+					DVP1Driving, DFPHigh, DFPLow */
+/*  CR96, SR2A[5], SR1B[1], SR2A[4], SR1E[2], CR9B,
+					SR65,        CR97,    CR99   */
+	/* LCK/VCK < 30000000 will use this value */
+	{DPA_CLK_RANGE_30M, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00,
+	 0x00},
+	/* 30000000 < LCK/VCK < 50000000 will use this value */
+	{DPA_CLK_RANGE_30_50M, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00,
+	 0x00},
+	/* 50000000 < LCK/VCK < 70000000 will use this value */
+	{DPA_CLK_RANGE_50_70M, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
+	 0x00},
+	/* 70000000 < LCK/VCK < 100000000 will use this value */
+	{DPA_CLK_RANGE_70_100M, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
+	 0x00},
+	/* 100000000 < LCK/VCK < 15000000 will use this value */
+	{DPA_CLK_RANGE_100_150M, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
+	 0x00},
+	/* 15000000 < LCK/VCK will use this value */
+	{DPA_CLK_RANGE_150M, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0E, 0x00,
+	 0x00},
+};
+
+struct GFX_DPA_SETTING GFX_DPA_SETTING_TBL_VT3327[] = {
+/*  ClkRange,DVP0, DVP0DataDriving,  DVP0ClockDriving, DVP1,
+					DVP1Driving, DFPHigh,   DFPLow */
+/*   CR96, SR2A[5], SR1B[1], SR2A[4], SR1E[2], CR9B,
+					SR65,        CR97,      CR99   */
+/* LCK/VCK < 30000000 will use this value */
+{DPA_CLK_RANGE_30M, 0x07, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x08, 0x01},
+/* 30000000 < LCK/VCK < 50000000 will use this value */
+{DPA_CLK_RANGE_30_50M, 0x07, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x08, 0x01},
+/* 50000000 < LCK/VCK < 70000000 will use this value */
+{DPA_CLK_RANGE_50_70M, 0x06, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x08, 0x01},
+/* 70000000 < LCK/VCK < 100000000 will use this value */
+{DPA_CLK_RANGE_70_100M, 0x03, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x08, 0x03},
+/* 100000000 < LCK/VCK < 15000000 will use this value */
+{DPA_CLK_RANGE_100_150M, 0x03, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x01, 0x02},
+/* 15000000 < LCK/VCK will use this value */
+{DPA_CLK_RANGE_150M, 0x00, 0x20, 0x00, 0x10, 0x00, 0x03, 0x00, 0x0D, 0x03},
+};
+
+/* For VT3364: */
+struct GFX_DPA_SETTING GFX_DPA_SETTING_TBL_VT3364[] = {
+/*  ClkRange,DVP0, DVP0DataDriving,  DVP0ClockDriving, DVP1,
+					DVP1Driving, DFPHigh,   DFPLow */
+/*   CR96, SR2A[5], SR1B[1], SR2A[4], SR1E[2], CR9B,
+					SR65,        CR97,      CR99   */
+/* LCK/VCK < 30000000 will use this value */
+{DPA_CLK_RANGE_30M, 0x07, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x08},
+/* 30000000 < LCK/VCK < 50000000 will use this value */
+{DPA_CLK_RANGE_30_50M, 0x07, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x08},
+/* 50000000 < LCK/VCK < 70000000 will use this value */
+{DPA_CLK_RANGE_50_70M, 0x07, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x08},
+/* 70000000 < LCK/VCK < 100000000 will use this value */
+{DPA_CLK_RANGE_70_100M, 0x07, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x08},
+/* 100000000 < LCK/VCK < 15000000 will use this value */
+{DPA_CLK_RANGE_100_150M, 0x03, 0x00, 0x02, 0x00, 0x00, 0x03, 0x00, 0x00, 0x08},
+/* 15000000 < LCK/VCK will use this value */
+{DPA_CLK_RANGE_150M, 0x01, 0x00, 0x02, 0x10, 0x00, 0x03, 0x00, 0x00, 0x08},
+};
diff --git a/drivers/video/fbdev/via/tblDPASetting.h b/drivers/video/fbdev/via/tblDPASetting.h
new file mode 100644
index 0000000000..9757a11858
--- /dev/null
+++ b/drivers/video/fbdev/via/tblDPASetting.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef _TBLDPASETTING_H_
+#define _TBLDPASETTING_H_
+#include "global.h"
+
+#define DPA_CLK_30M       30000000
+#define DPA_CLK_50M       50000000
+#define DPA_CLK_70M       70000000
+#define DPA_CLK_100M      100000000
+#define DPA_CLK_150M      150000000
+
+enum DPA_RANGE {
+	DPA_CLK_RANGE_30M,
+	DPA_CLK_RANGE_30_50M,
+	DPA_CLK_RANGE_50_70M,
+	DPA_CLK_RANGE_70_100M,
+	DPA_CLK_RANGE_100_150M,
+	DPA_CLK_RANGE_150M
+};
+
+extern struct GFX_DPA_SETTING GFX_DPA_SETTING_TBL_VT3324[6];
+extern struct GFX_DPA_SETTING GFX_DPA_SETTING_TBL_VT3327[];
+extern struct GFX_DPA_SETTING GFX_DPA_SETTING_TBL_VT3364[6];
+
+#endif
diff --git a/drivers/video/fbdev/via/via-core.c b/drivers/video/fbdev/via/via-core.c
new file mode 100644
index 0000000000..908524a74a
--- /dev/null
+++ b/drivers/video/fbdev/via/via-core.c
@@ -0,0 +1,755 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
+ */
+
+/*
+ * Core code for the Via multifunction framebuffer device.
+ */
+#include <linux/aperture.h>
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+#include "via-gpio.h"
+#include "global.h"
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+#include <linux/pm.h>
+
+/*
+ * The default port config.
+ */
+static struct via_port_cfg adap_configs[] = {
+	[VIA_PORT_26]	= { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x26 },
+	[VIA_PORT_31]	= { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x31 },
+	[VIA_PORT_25]	= { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
+	[VIA_PORT_2C]	= { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
+	[VIA_PORT_3D]	= { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
+	{ 0, 0, 0, 0 }
+};
+
+/*
+ * The OLPC XO-1.5 puts the camera power and reset lines onto
+ * GPIO 2C.
+ */
+static struct via_port_cfg olpc_adap_configs[] = {
+	[VIA_PORT_26]	= { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x26 },
+	[VIA_PORT_31]	= { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x31 },
+	[VIA_PORT_25]	= { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
+	[VIA_PORT_2C]	= { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x2c },
+	[VIA_PORT_3D]	= { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
+	{ 0, 0, 0, 0 }
+};
+
+/*
+ * We currently only support one viafb device (will there ever be
+ * more than one?), so just declare it globally here.
+ */
+static struct viafb_dev global_dev;
+
+
+/*
+ * Basic register access; spinlock required.
+ */
+static inline void viafb_mmio_write(int reg, u32 v)
+{
+	iowrite32(v, global_dev.engine_mmio + reg);
+}
+
+static inline int viafb_mmio_read(int reg)
+{
+	return ioread32(global_dev.engine_mmio + reg);
+}
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Interrupt management.  We have a single IRQ line for a lot of
+ * different functions, so we need to share it.  The design here
+ * is that we don't want to reimplement the shared IRQ code here;
+ * we also want to avoid having contention for a single handler thread.
+ * So each subdev driver which needs interrupts just requests
+ * them directly from the kernel.  We just have what's needed for
+ * overall access to the interrupt control register.
+ */
+
+/*
+ * Which interrupts are enabled now?
+ */
+static u32 viafb_enabled_ints;
+
+static void viafb_int_init(void)
+{
+	viafb_enabled_ints = 0;
+
+	viafb_mmio_write(VDE_INTERRUPT, 0);
+}
+
+/*
+ * Allow subdevs to ask for specific interrupts to be enabled.  These
+ * functions must be called with reg_lock held
+ */
+void viafb_irq_enable(u32 mask)
+{
+	viafb_enabled_ints |= mask;
+	viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
+}
+EXPORT_SYMBOL_GPL(viafb_irq_enable);
+
+void viafb_irq_disable(u32 mask)
+{
+	viafb_enabled_ints &= ~mask;
+	if (viafb_enabled_ints == 0)
+		viafb_mmio_write(VDE_INTERRUPT, 0);  /* Disable entirely */
+	else
+		viafb_mmio_write(VDE_INTERRUPT,
+				viafb_enabled_ints | VDE_I_ENABLE);
+}
+EXPORT_SYMBOL_GPL(viafb_irq_disable);
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Currently, the camera driver is the only user of the DMA code, so we
+ * only compile it in if the camera driver is being built.  Chances are,
+ * most viafb systems will not need to have this extra code for a while.
+ * As soon as another user comes long, the ifdef can be removed.
+ */
+#if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
+/*
+ * Access to the DMA engine.  This currently provides what the camera
+ * driver needs (i.e. outgoing only) but is easily expandable if need
+ * be.
+ */
+
+/*
+ * There are four DMA channels in the vx855.  For now, we only
+ * use one of them, though.  Most of the time, the DMA channel
+ * will be idle, so we keep the IRQ handler unregistered except
+ * when some subsystem has indicated an interest.
+ */
+static int viafb_dma_users;
+static DECLARE_COMPLETION(viafb_dma_completion);
+/*
+ * This mutex protects viafb_dma_users and our global interrupt
+ * registration state; it also serializes access to the DMA
+ * engine.
+ */
+static DEFINE_MUTEX(viafb_dma_lock);
+
+/*
+ * The VX855 DMA descriptor (used for s/g transfers) looks
+ * like this.
+ */
+struct viafb_vx855_dma_descr {
+	u32	addr_low;	/* Low part of phys addr */
+	u32	addr_high;	/* High 12 bits of addr */
+	u32	fb_offset;	/* Offset into FB memory */
+	u32	seg_size;	/* Size, 16-byte units */
+	u32	tile_mode;	/* "tile mode" setting */
+	u32	next_desc_low;	/* Next descriptor addr */
+	u32	next_desc_high;
+	u32	pad;		/* Fill out to 64 bytes */
+};
+
+/*
+ * Flags added to the "next descriptor low" pointers
+ */
+#define VIAFB_DMA_MAGIC		0x01  /* ??? Just has to be there */
+#define VIAFB_DMA_FINAL_SEGMENT 0x02  /* Final segment */
+
+/*
+ * The completion IRQ handler.
+ */
+static irqreturn_t viafb_dma_irq(int irq, void *data)
+{
+	int csr;
+	irqreturn_t ret = IRQ_NONE;
+
+	spin_lock(&global_dev.reg_lock);
+	csr = viafb_mmio_read(VDMA_CSR0);
+	if (csr & VDMA_C_DONE) {
+		viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
+		complete(&viafb_dma_completion);
+		ret = IRQ_HANDLED;
+	}
+	spin_unlock(&global_dev.reg_lock);
+	return ret;
+}
+
+/*
+ * Indicate a need for DMA functionality.
+ */
+int viafb_request_dma(void)
+{
+	int ret = 0;
+
+	/*
+	 * Only VX855 is supported currently.
+	 */
+	if (global_dev.chip_type != UNICHROME_VX855)
+		return -ENODEV;
+	/*
+	 * Note the new user and set up our interrupt handler
+	 * if need be.
+	 */
+	mutex_lock(&viafb_dma_lock);
+	viafb_dma_users++;
+	if (viafb_dma_users == 1) {
+		ret = request_irq(global_dev.pdev->irq, viafb_dma_irq,
+				IRQF_SHARED, "via-dma", &viafb_dma_users);
+		if (ret)
+			viafb_dma_users--;
+		else
+			viafb_irq_enable(VDE_I_DMA0TDEN);
+	}
+	mutex_unlock(&viafb_dma_lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(viafb_request_dma);
+
+void viafb_release_dma(void)
+{
+	mutex_lock(&viafb_dma_lock);
+	viafb_dma_users--;
+	if (viafb_dma_users == 0) {
+		viafb_irq_disable(VDE_I_DMA0TDEN);
+		free_irq(global_dev.pdev->irq, &viafb_dma_users);
+	}
+	mutex_unlock(&viafb_dma_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_release_dma);
+
+/*
+ * Do a scatter/gather DMA copy from FB memory.  You must have done
+ * a successful call to viafb_request_dma() first.
+ */
+int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
+{
+	struct viafb_vx855_dma_descr *descr;
+	void *descrpages;
+	dma_addr_t descr_handle;
+	unsigned long flags;
+	int i;
+	struct scatterlist *sgentry;
+	dma_addr_t nextdesc;
+
+	/*
+	 * Get a place to put the descriptors.
+	 */
+	descrpages = dma_alloc_coherent(&global_dev.pdev->dev,
+			nsg*sizeof(struct viafb_vx855_dma_descr),
+			&descr_handle, GFP_KERNEL);
+	if (descrpages == NULL) {
+		dev_err(&global_dev.pdev->dev, "Unable to get descr page.\n");
+		return -ENOMEM;
+	}
+	mutex_lock(&viafb_dma_lock);
+	/*
+	 * Fill them in.
+	 */
+	descr = descrpages;
+	nextdesc = descr_handle + sizeof(struct viafb_vx855_dma_descr);
+	for_each_sg(sg, sgentry, nsg, i) {
+		dma_addr_t paddr = sg_dma_address(sgentry);
+		descr->addr_low = paddr & 0xfffffff0;
+		descr->addr_high = ((u64) paddr >> 32) & 0x0fff;
+		descr->fb_offset = offset;
+		descr->seg_size = sg_dma_len(sgentry) >> 4;
+		descr->tile_mode = 0;
+		descr->next_desc_low = (nextdesc&0xfffffff0) | VIAFB_DMA_MAGIC;
+		descr->next_desc_high = ((u64) nextdesc >> 32) & 0x0fff;
+		descr->pad = 0xffffffff;  /* VIA driver does this */
+		offset += sg_dma_len(sgentry);
+		nextdesc += sizeof(struct viafb_vx855_dma_descr);
+		descr++;
+	}
+	descr[-1].next_desc_low = VIAFB_DMA_FINAL_SEGMENT|VIAFB_DMA_MAGIC;
+	/*
+	 * Program the engine.
+	 */
+	spin_lock_irqsave(&global_dev.reg_lock, flags);
+	init_completion(&viafb_dma_completion);
+	viafb_mmio_write(VDMA_DQWCR0, 0);
+	viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
+	viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE | VDMA_MR_CHAIN);
+	viafb_mmio_write(VDMA_DPRL0, descr_handle | VIAFB_DMA_MAGIC);
+	viafb_mmio_write(VDMA_DPRH0,
+			(((u64)descr_handle >> 32) & 0x0fff) | 0xf0000);
+	(void) viafb_mmio_read(VDMA_CSR0);
+	viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
+	spin_unlock_irqrestore(&global_dev.reg_lock, flags);
+	/*
+	 * Now we just wait until the interrupt handler says
+	 * we're done.  Except that, actually, we need to wait a little
+	 * longer: the interrupts seem to jump the gun a little and we
+	 * get corrupted frames sometimes.
+	 */
+	wait_for_completion_timeout(&viafb_dma_completion, 1);
+	msleep(1);
+	if ((viafb_mmio_read(VDMA_CSR0)&VDMA_C_DONE) == 0)
+		printk(KERN_ERR "VIA DMA timeout!\n");
+	/*
+	 * Clean up and we're done.
+	 */
+	viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
+	viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
+	mutex_unlock(&viafb_dma_lock);
+	dma_free_coherent(&global_dev.pdev->dev,
+			nsg*sizeof(struct viafb_vx855_dma_descr), descrpages,
+			descr_handle);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
+#endif /* CONFIG_VIDEO_VIA_CAMERA */
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Figure out how big our framebuffer memory is.  Kind of ugly,
+ * but evidently we can't trust the information found in the
+ * fbdev configuration area.
+ */
+static u16 via_function3[] = {
+	CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
+	CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
+	P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3, VX900_FUNCTION3,
+};
+
+/* Get the BIOS-configured framebuffer size from PCI configuration space
+ * of function 3 in the respective chipset */
+static int viafb_get_fb_size_from_pci(int chip_type)
+{
+	int i;
+	u8 offset = 0;
+	u32 FBSize;
+	u32 VideoMemSize;
+
+	/* search for the "FUNCTION3" device in this chipset */
+	for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
+		struct pci_dev *pdev;
+
+		pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
+				      NULL);
+		if (!pdev)
+			continue;
+
+		DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
+
+		switch (pdev->device) {
+		case CLE266_FUNCTION3:
+		case KM400_FUNCTION3:
+			offset = 0xE0;
+			break;
+		case CN400_FUNCTION3:
+		case CN700_FUNCTION3:
+		case CX700_FUNCTION3:
+		case KM800_FUNCTION3:
+		case KM890_FUNCTION3:
+		case P4M890_FUNCTION3:
+		case P4M900_FUNCTION3:
+		case VX800_FUNCTION3:
+		case VX855_FUNCTION3:
+		case VX900_FUNCTION3:
+		/*case CN750_FUNCTION3: */
+			offset = 0xA0;
+			break;
+		}
+
+		if (!offset)
+			break;
+
+		pci_read_config_dword(pdev, offset, &FBSize);
+		pci_dev_put(pdev);
+	}
+
+	if (!offset) {
+		printk(KERN_ERR "cannot determine framebuffer size\n");
+		return -EIO;
+	}
+
+	FBSize = FBSize & 0x00007000;
+	DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
+
+	if (chip_type < UNICHROME_CX700) {
+		switch (FBSize) {
+		case 0x00004000:
+			VideoMemSize = (16 << 20);	/*16M */
+			break;
+
+		case 0x00005000:
+			VideoMemSize = (32 << 20);	/*32M */
+			break;
+
+		case 0x00006000:
+			VideoMemSize = (64 << 20);	/*64M */
+			break;
+
+		default:
+			VideoMemSize = (32 << 20);	/*32M */
+			break;
+		}
+	} else {
+		switch (FBSize) {
+		case 0x00001000:
+			VideoMemSize = (8 << 20);	/*8M */
+			break;
+
+		case 0x00002000:
+			VideoMemSize = (16 << 20);	/*16M */
+			break;
+
+		case 0x00003000:
+			VideoMemSize = (32 << 20);	/*32M */
+			break;
+
+		case 0x00004000:
+			VideoMemSize = (64 << 20);	/*64M */
+			break;
+
+		case 0x00005000:
+			VideoMemSize = (128 << 20);	/*128M */
+			break;
+
+		case 0x00006000:
+			VideoMemSize = (256 << 20);	/*256M */
+			break;
+
+		case 0x00007000:	/* Only on VX855/875 */
+			VideoMemSize = (512 << 20);	/*512M */
+			break;
+
+		default:
+			VideoMemSize = (32 << 20);	/*32M */
+			break;
+		}
+	}
+
+	return VideoMemSize;
+}
+
+
+/*
+ * Figure out and map our MMIO regions.
+ */
+static int via_pci_setup_mmio(struct viafb_dev *vdev)
+{
+	int ret;
+	/*
+	 * Hook up to the device registers.  Note that we soldier
+	 * on if it fails; the framebuffer can operate (without
+	 * acceleration) without this region.
+	 */
+	vdev->engine_start = pci_resource_start(vdev->pdev, 1);
+	vdev->engine_len = pci_resource_len(vdev->pdev, 1);
+	vdev->engine_mmio = ioremap(vdev->engine_start,
+			vdev->engine_len);
+	if (vdev->engine_mmio == NULL)
+		dev_err(&vdev->pdev->dev,
+				"Unable to map engine MMIO; operation will be "
+				"slow and crippled.\n");
+	/*
+	 * Map in framebuffer memory.  For now, failure here is
+	 * fatal.  Unfortunately, in the absence of significant
+	 * vmalloc space, failure here is also entirely plausible.
+	 * Eventually we want to move away from mapping this
+	 * entire region.
+	 */
+	if (vdev->chip_type == UNICHROME_VX900)
+		vdev->fbmem_start = pci_resource_start(vdev->pdev, 2);
+	else
+		vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
+	ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
+	if (ret < 0)
+		goto out_unmap;
+
+	/* try to map less memory on failure, 8 MB should be still enough */
+	for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) {
+		vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len);
+		if (vdev->fbmem)
+			break;
+	}
+
+	if (vdev->fbmem == NULL) {
+		ret = -ENOMEM;
+		goto out_unmap;
+	}
+	return 0;
+out_unmap:
+	iounmap(vdev->engine_mmio);
+	return ret;
+}
+
+static void via_pci_teardown_mmio(struct viafb_dev *vdev)
+{
+	iounmap(vdev->fbmem);
+	iounmap(vdev->engine_mmio);
+}
+
+/*
+ * Create our subsidiary devices.
+ */
+static struct viafb_subdev_info {
+	char *name;
+	struct platform_device *platdev;
+} viafb_subdevs[] = {
+	{
+		.name = "viafb-gpio",
+	},
+	{
+		.name = "viafb-i2c",
+	},
+#if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
+	{
+		.name = "viafb-camera",
+	},
+#endif
+};
+#define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)
+
+static int via_create_subdev(struct viafb_dev *vdev,
+			     struct viafb_subdev_info *info)
+{
+	int ret;
+
+	info->platdev = platform_device_alloc(info->name, -1);
+	if (!info->platdev) {
+		dev_err(&vdev->pdev->dev, "Unable to allocate pdev %s\n",
+			info->name);
+		return -ENOMEM;
+	}
+	info->platdev->dev.parent = &vdev->pdev->dev;
+	info->platdev->dev.platform_data = vdev;
+	ret = platform_device_add(info->platdev);
+	if (ret) {
+		dev_err(&vdev->pdev->dev, "Unable to add pdev %s\n",
+				info->name);
+		platform_device_put(info->platdev);
+		info->platdev = NULL;
+	}
+	return ret;
+}
+
+static int via_setup_subdevs(struct viafb_dev *vdev)
+{
+	int i;
+
+	/*
+	 * Ignore return values.  Even if some of the devices
+	 * fail to be created, we'll still be able to use some
+	 * of the rest.
+	 */
+	for (i = 0; i < N_SUBDEVS; i++)
+		via_create_subdev(vdev, viafb_subdevs + i);
+	return 0;
+}
+
+static void via_teardown_subdevs(void)
+{
+	int i;
+
+	for (i = 0; i < N_SUBDEVS; i++)
+		if (viafb_subdevs[i].platdev) {
+			viafb_subdevs[i].platdev->dev.platform_data = NULL;
+			platform_device_unregister(viafb_subdevs[i].platdev);
+		}
+}
+
+/*
+ * Power management functions
+ */
+static __maybe_unused LIST_HEAD(viafb_pm_hooks);
+static __maybe_unused DEFINE_MUTEX(viafb_pm_hooks_lock);
+
+void viafb_pm_register(struct viafb_pm_hooks *hooks)
+{
+	INIT_LIST_HEAD(&hooks->list);
+
+	mutex_lock(&viafb_pm_hooks_lock);
+	list_add_tail(&hooks->list, &viafb_pm_hooks);
+	mutex_unlock(&viafb_pm_hooks_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_pm_register);
+
+void viafb_pm_unregister(struct viafb_pm_hooks *hooks)
+{
+	mutex_lock(&viafb_pm_hooks_lock);
+	list_del(&hooks->list);
+	mutex_unlock(&viafb_pm_hooks_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_pm_unregister);
+
+static int __maybe_unused via_suspend(struct device *dev)
+{
+	struct viafb_pm_hooks *hooks;
+
+	/*
+	 * "I've occasionally hit a few drivers that caused suspend
+	 * failures, and each and every time it was a driver bug, and
+	 * the right thing to do was to just ignore the error and suspend
+	 * anyway - returning an error code and trying to undo the suspend
+	 * is not what anybody ever really wants, even if our model
+	 *_allows_ for it."
+	 * -- Linus Torvalds, Dec. 7, 2009
+	 */
+	mutex_lock(&viafb_pm_hooks_lock);
+	list_for_each_entry_reverse(hooks, &viafb_pm_hooks, list)
+		hooks->suspend(hooks->private);
+	mutex_unlock(&viafb_pm_hooks_lock);
+
+	return 0;
+}
+
+static int __maybe_unused via_resume(struct device *dev)
+{
+	struct viafb_pm_hooks *hooks;
+
+	/* Now bring back any subdevs */
+	mutex_lock(&viafb_pm_hooks_lock);
+	list_for_each_entry(hooks, &viafb_pm_hooks, list)
+		hooks->resume(hooks->private);
+	mutex_unlock(&viafb_pm_hooks_lock);
+
+	return 0;
+}
+
+static int via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	int ret;
+
+	ret = aperture_remove_conflicting_pci_devices(pdev, "viafb");
+	if (ret)
+		return ret;
+
+	ret = pci_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	/*
+	 * Global device initialization.
+	 */
+	memset(&global_dev, 0, sizeof(global_dev));
+	global_dev.pdev = pdev;
+	global_dev.chip_type = ent->driver_data;
+	global_dev.port_cfg = adap_configs;
+	if (machine_is_olpc())
+		global_dev.port_cfg = olpc_adap_configs;
+
+	spin_lock_init(&global_dev.reg_lock);
+	ret = via_pci_setup_mmio(&global_dev);
+	if (ret)
+		goto out_disable;
+	/*
+	 * Set up interrupts and create our subdevices.  Continue even if
+	 * some things fail.
+	 */
+	viafb_int_init();
+	via_setup_subdevs(&global_dev);
+	/*
+	 * Set up the framebuffer device
+	 */
+	ret = via_fb_pci_probe(&global_dev);
+	if (ret)
+		goto out_subdevs;
+	return 0;
+
+out_subdevs:
+	via_teardown_subdevs();
+	via_pci_teardown_mmio(&global_dev);
+out_disable:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void via_pci_remove(struct pci_dev *pdev)
+{
+	via_teardown_subdevs();
+	via_fb_pci_remove(pdev);
+	via_pci_teardown_mmio(&global_dev);
+	pci_disable_device(pdev);
+}
+
+
+static const struct pci_device_id via_pci_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
+	  .driver_data = UNICHROME_CLE266 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
+	  .driver_data = UNICHROME_K400 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
+	  .driver_data = UNICHROME_K800 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
+	  .driver_data = UNICHROME_PM800 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN700_DID),
+	  .driver_data = UNICHROME_CN700 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
+	  .driver_data = UNICHROME_CX700 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
+	  .driver_data = UNICHROME_CN750 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
+	  .driver_data = UNICHROME_K8M890 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
+	  .driver_data = UNICHROME_P4M890 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
+	  .driver_data = UNICHROME_P4M900 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
+	  .driver_data = UNICHROME_VX800 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
+	  .driver_data = UNICHROME_VX855 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX900_DID),
+	  .driver_data = UNICHROME_VX900 },
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, via_pci_table);
+
+static const struct dev_pm_ops via_pm_ops = {
+#ifdef CONFIG_PM_SLEEP
+	.suspend	= via_suspend,
+	.resume		= via_resume,
+	.freeze		= NULL,
+	.thaw		= via_resume,
+	.poweroff	= NULL,
+	.restore	= via_resume,
+#endif
+};
+
+static struct pci_driver via_driver = {
+	.name		= "viafb",
+	.id_table	= via_pci_table,
+	.probe		= via_pci_probe,
+	.remove		= via_pci_remove,
+	.driver.pm	= &via_pm_ops,
+};
+
+static int __init via_core_init(void)
+{
+	int ret;
+
+	if (fb_modesetting_disabled("viafb"))
+		return -ENODEV;
+
+	ret = viafb_init();
+	if (ret)
+		return ret;
+	viafb_i2c_init();
+	viafb_gpio_init();
+	ret = pci_register_driver(&via_driver);
+	if (ret) {
+		viafb_gpio_exit();
+		viafb_i2c_exit();
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __exit via_core_exit(void)
+{
+	pci_unregister_driver(&via_driver);
+	viafb_gpio_exit();
+	viafb_i2c_exit();
+	viafb_exit();
+}
+
+module_init(via_core_init);
+module_exit(via_core_exit);
diff --git a/drivers/video/fbdev/via/via-gpio.c b/drivers/video/fbdev/via/via-gpio.c
new file mode 100644
index 0000000000..2719943c06
--- /dev/null
+++ b/drivers/video/fbdev/via/via-gpio.c
@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Support for viafb GPIO ports.
+ *
+ * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
+ */
+
+#include <linux/spinlock.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
+#include <linux/platform_device.h>
+#include <linux/via-core.h>
+#include <linux/export.h>
+#include "via-gpio.h"
+
+/*
+ * The ports we know about.  Note that the port-25 gpios are not
+ * mentioned in the datasheet.
+ */
+
+struct viafb_gpio {
+	char *vg_name;	/* Data sheet name */
+	u16 vg_io_port;
+	u8  vg_port_index;
+	int  vg_mask_shift;
+};
+
+static struct viafb_gpio viafb_all_gpios[] = {
+	{
+		.vg_name = "VGPIO0",  /* Guess - not in datasheet */
+		.vg_io_port = VIASR,
+		.vg_port_index = 0x25,
+		.vg_mask_shift = 1
+	},
+	{
+		.vg_name = "VGPIO1",
+		.vg_io_port = VIASR,
+		.vg_port_index = 0x25,
+		.vg_mask_shift = 0
+	},
+	{
+		.vg_name = "VGPIO2",  /* aka DISPCLKI0 */
+		.vg_io_port = VIASR,
+		.vg_port_index = 0x2c,
+		.vg_mask_shift = 1
+	},
+	{
+		.vg_name = "VGPIO3",  /* aka DISPCLKO0 */
+		.vg_io_port = VIASR,
+		.vg_port_index = 0x2c,
+		.vg_mask_shift = 0
+	},
+	{
+		.vg_name = "VGPIO4",  /* DISPCLKI1 */
+		.vg_io_port = VIASR,
+		.vg_port_index = 0x3d,
+		.vg_mask_shift = 1
+	},
+	{
+		.vg_name = "VGPIO5",  /* DISPCLKO1 */
+		.vg_io_port = VIASR,
+		.vg_port_index = 0x3d,
+		.vg_mask_shift = 0
+	},
+};
+
+#define VIAFB_NUM_GPIOS ARRAY_SIZE(viafb_all_gpios)
+
+/*
+ * This structure controls the active GPIOs, which may be a subset
+ * of those which are known.
+ */
+
+struct viafb_gpio_cfg {
+	struct gpio_chip gpio_chip;
+	struct viafb_dev *vdev;
+	struct viafb_gpio *active_gpios[VIAFB_NUM_GPIOS];
+	const char *gpio_names[VIAFB_NUM_GPIOS];
+};
+
+/*
+ * GPIO access functions
+ */
+static void via_gpio_set(struct gpio_chip *chip, unsigned int nr,
+			 int value)
+{
+	struct viafb_gpio_cfg *cfg = gpiochip_get_data(chip);
+	u8 reg;
+	struct viafb_gpio *gpio;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cfg->vdev->reg_lock, flags);
+	gpio = cfg->active_gpios[nr];
+	reg = via_read_reg(VIASR, gpio->vg_port_index);
+	reg |= 0x40 << gpio->vg_mask_shift;  /* output enable */
+	if (value)
+		reg |= 0x10 << gpio->vg_mask_shift;
+	else
+		reg &= ~(0x10 << gpio->vg_mask_shift);
+	via_write_reg(VIASR, gpio->vg_port_index, reg);
+	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
+}
+
+static int via_gpio_dir_out(struct gpio_chip *chip, unsigned int nr,
+			    int value)
+{
+	via_gpio_set(chip, nr, value);
+	return 0;
+}
+
+/*
+ * Set the input direction.  I'm not sure this is right; we should
+ * be able to do input without disabling output.
+ */
+static int via_gpio_dir_input(struct gpio_chip *chip, unsigned int nr)
+{
+	struct viafb_gpio_cfg *cfg = gpiochip_get_data(chip);
+	struct viafb_gpio *gpio;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cfg->vdev->reg_lock, flags);
+	gpio = cfg->active_gpios[nr];
+	via_write_reg_mask(VIASR, gpio->vg_port_index, 0,
+			0x40 << gpio->vg_mask_shift);
+	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
+	return 0;
+}
+
+static int via_gpio_get(struct gpio_chip *chip, unsigned int nr)
+{
+	struct viafb_gpio_cfg *cfg = gpiochip_get_data(chip);
+	u8 reg;
+	struct viafb_gpio *gpio;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cfg->vdev->reg_lock, flags);
+	gpio = cfg->active_gpios[nr];
+	reg = via_read_reg(VIASR, gpio->vg_port_index);
+	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
+	return !!(reg & (0x04 << gpio->vg_mask_shift));
+}
+
+
+static struct viafb_gpio_cfg viafb_gpio_config = {
+	.gpio_chip = {
+		.label = "VIAFB onboard GPIO",
+		.owner = THIS_MODULE,
+		.direction_output = via_gpio_dir_out,
+		.set = via_gpio_set,
+		.direction_input = via_gpio_dir_input,
+		.get = via_gpio_get,
+		.base = -1,
+		.ngpio = 0,
+		.can_sleep = 0
+	}
+};
+
+/*
+ * Manage the software enable bit.
+ */
+static void viafb_gpio_enable(struct viafb_gpio *gpio)
+{
+	via_write_reg_mask(VIASR, gpio->vg_port_index, 0x02, 0x02);
+}
+
+static void viafb_gpio_disable(struct viafb_gpio *gpio)
+{
+	via_write_reg_mask(VIASR, gpio->vg_port_index, 0, 0x02);
+}
+
+#ifdef CONFIG_PM
+
+static int viafb_gpio_suspend(void *private)
+{
+	return 0;
+}
+
+static int viafb_gpio_resume(void *private)
+{
+	int i;
+
+	for (i = 0; i < viafb_gpio_config.gpio_chip.ngpio; i += 2)
+		viafb_gpio_enable(viafb_gpio_config.active_gpios[i]);
+	return 0;
+}
+
+static struct viafb_pm_hooks viafb_gpio_pm_hooks = {
+	.suspend = viafb_gpio_suspend,
+	.resume = viafb_gpio_resume
+};
+#endif /* CONFIG_PM */
+
+static struct gpiod_lookup_table viafb_gpio_table = {
+	.dev_id = "viafb-camera",
+	.table = {
+		GPIO_LOOKUP("via-gpio", 2, "VGPIO2", GPIO_ACTIVE_LOW),
+		GPIO_LOOKUP("via-gpio", 3, "VGPIO3", GPIO_ACTIVE_HIGH),
+		{ }
+	},
+};
+
+/*
+ * Platform device stuff.
+ */
+static int viafb_gpio_probe(struct platform_device *platdev)
+{
+	struct viafb_dev *vdev = platdev->dev.platform_data;
+	struct via_port_cfg *port_cfg = vdev->port_cfg;
+	int i, ngpio = 0, ret;
+	struct viafb_gpio *gpio;
+	unsigned long flags;
+
+	/*
+	 * Set up entries for all GPIOs which have been configured to
+	 * operate as such (as opposed to as i2c ports).
+	 */
+	for (i = 0; i < VIAFB_NUM_PORTS; i++) {
+		if (port_cfg[i].mode != VIA_MODE_GPIO)
+			continue;
+		for (gpio = viafb_all_gpios;
+		     gpio < viafb_all_gpios + VIAFB_NUM_GPIOS; gpio++)
+			if (gpio->vg_port_index == port_cfg[i].ioport_index) {
+				viafb_gpio_config.active_gpios[ngpio] = gpio;
+				viafb_gpio_config.gpio_names[ngpio] =
+					gpio->vg_name;
+				ngpio++;
+			}
+	}
+	viafb_gpio_config.gpio_chip.ngpio = ngpio;
+	viafb_gpio_config.gpio_chip.names = viafb_gpio_config.gpio_names;
+	viafb_gpio_config.vdev = vdev;
+	if (ngpio == 0) {
+		printk(KERN_INFO "viafb: no GPIOs configured\n");
+		return 0;
+	}
+	/*
+	 * Enable the ports.  They come in pairs, with a single
+	 * enable bit for both.
+	 */
+	spin_lock_irqsave(&viafb_gpio_config.vdev->reg_lock, flags);
+	for (i = 0; i < ngpio; i += 2)
+		viafb_gpio_enable(viafb_gpio_config.active_gpios[i]);
+	spin_unlock_irqrestore(&viafb_gpio_config.vdev->reg_lock, flags);
+	/*
+	 * Get registered.
+	 */
+	viafb_gpio_config.gpio_chip.base = -1;  /* Dynamic */
+	viafb_gpio_config.gpio_chip.label = "via-gpio";
+	ret = gpiochip_add_data(&viafb_gpio_config.gpio_chip,
+				&viafb_gpio_config);
+	if (ret) {
+		printk(KERN_ERR "viafb: failed to add gpios (%d)\n", ret);
+		viafb_gpio_config.gpio_chip.ngpio = 0;
+	}
+
+	gpiod_add_lookup_table(&viafb_gpio_table);
+
+#ifdef CONFIG_PM
+	viafb_pm_register(&viafb_gpio_pm_hooks);
+#endif
+	return ret;
+}
+
+
+static void viafb_gpio_remove(struct platform_device *platdev)
+{
+	unsigned long flags;
+	int i;
+
+#ifdef CONFIG_PM
+	viafb_pm_unregister(&viafb_gpio_pm_hooks);
+#endif
+
+	/*
+	 * Get unregistered.
+	 */
+	if (viafb_gpio_config.gpio_chip.ngpio > 0) {
+		gpiochip_remove(&viafb_gpio_config.gpio_chip);
+	}
+	/*
+	 * Disable the ports.
+	 */
+	spin_lock_irqsave(&viafb_gpio_config.vdev->reg_lock, flags);
+	for (i = 0; i < viafb_gpio_config.gpio_chip.ngpio; i += 2)
+		viafb_gpio_disable(viafb_gpio_config.active_gpios[i]);
+	viafb_gpio_config.gpio_chip.ngpio = 0;
+	spin_unlock_irqrestore(&viafb_gpio_config.vdev->reg_lock, flags);
+}
+
+static struct platform_driver via_gpio_driver = {
+	.driver = {
+		.name = "viafb-gpio",
+	},
+	.probe = viafb_gpio_probe,
+	.remove_new = viafb_gpio_remove,
+};
+
+int viafb_gpio_init(void)
+{
+	return platform_driver_register(&via_gpio_driver);
+}
+
+void viafb_gpio_exit(void)
+{
+	platform_driver_unregister(&via_gpio_driver);
+}
diff --git a/drivers/video/fbdev/via/via-gpio.h b/drivers/video/fbdev/via/via-gpio.h
new file mode 100644
index 0000000000..2ffedf282f
--- /dev/null
+++ b/drivers/video/fbdev/via/via-gpio.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Support for viafb GPIO ports.
+ *
+ * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
+ */
+
+#ifndef __VIA_GPIO_H__
+#define __VIA_GPIO_H__
+
+extern int viafb_gpio_init(void);
+extern void viafb_gpio_exit(void);
+#endif
diff --git a/drivers/video/fbdev/via/via_aux.c b/drivers/video/fbdev/via/via_aux.c
new file mode 100644
index 0000000000..902191dddb
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * infrastructure for devices connected via I2C
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap)
+{
+	struct via_aux_bus *bus;
+
+	if (!adap)
+		return NULL;
+
+	bus = kmalloc(sizeof(*bus), GFP_KERNEL);
+	if (!bus)
+		return NULL;
+
+	bus->adap = adap;
+	INIT_LIST_HEAD(&bus->drivers);
+
+	via_aux_edid_probe(bus);
+	via_aux_vt1636_probe(bus);
+	via_aux_vt1632_probe(bus);
+	via_aux_vt1631_probe(bus);
+	via_aux_vt1625_probe(bus);
+	via_aux_vt1622_probe(bus);
+	via_aux_vt1621_probe(bus);
+	via_aux_sii164_probe(bus);
+	via_aux_ch7301_probe(bus);
+
+	return bus;
+}
+
+void via_aux_free(struct via_aux_bus *bus)
+{
+	struct via_aux_drv *pos, *n;
+
+	if (!bus)
+		return;
+
+	list_for_each_entry_safe(pos, n, &bus->drivers, chain) {
+		if (pos->cleanup)
+			pos->cleanup(pos);
+
+		list_del(&pos->chain);
+		kfree(pos->data);
+		kfree(pos);
+	}
+
+	kfree(bus);
+}
+
+const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus)
+{
+	struct via_aux_drv *pos;
+	const struct fb_videomode *mode = NULL;
+
+	if (!bus)
+		return NULL;
+
+	list_for_each_entry(pos, &bus->drivers, chain) {
+		if (pos->get_preferred_mode)
+			mode = pos->get_preferred_mode(pos);
+	}
+
+	return mode;
+}
diff --git a/drivers/video/fbdev/via/via_aux.h b/drivers/video/fbdev/via/via_aux.h
new file mode 100644
index 0000000000..0933bbf20e
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * infrastructure for devices connected via I2C
+ */
+
+#ifndef __VIA_AUX_H__
+#define __VIA_AUX_H__
+
+
+#include <linux/list.h>
+#include <linux/i2c.h>
+#include <linux/fb.h>
+
+
+struct via_aux_bus {
+	struct i2c_adapter *adap;	/* the I2C device to access the bus */
+	struct list_head drivers;	/* drivers for devices on this bus */
+};
+
+struct via_aux_drv {
+	struct list_head chain;		/* chain to support multiple drivers */
+
+	struct via_aux_bus *bus;	/* the I2C bus used */
+	u8 addr;			/* the I2C slave address */
+
+	const char *name;	/* human readable name of the driver */
+	void *data;		/* private data of this driver */
+
+	void (*cleanup)(struct via_aux_drv *drv);
+	const struct fb_videomode* (*get_preferred_mode)
+		(struct via_aux_drv *drv);
+};
+
+
+struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap);
+void via_aux_free(struct via_aux_bus *bus);
+const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus);
+
+
+static inline bool via_aux_add(struct via_aux_drv *drv)
+{
+	struct via_aux_drv *data = kmalloc(sizeof(*data), GFP_KERNEL);
+
+	if (!data)
+		return false;
+
+	*data = *drv;
+	list_add_tail(&data->chain, &data->bus->drivers);
+	return true;
+}
+
+static inline bool via_aux_read(struct via_aux_drv *drv, u8 start, u8 *buf,
+	u8 len)
+{
+	struct i2c_msg msg[2] = {
+		{.addr = drv->addr, .flags = 0, .len = 1, .buf = &start},
+		{.addr = drv->addr, .flags = I2C_M_RD, .len = len, .buf = buf} };
+
+	return i2c_transfer(drv->bus->adap, msg, 2) == 2;
+}
+
+
+/* probe functions of existing drivers - should only be called in via_aux.c */
+void via_aux_ch7301_probe(struct via_aux_bus *bus);
+void via_aux_edid_probe(struct via_aux_bus *bus);
+void via_aux_sii164_probe(struct via_aux_bus *bus);
+void via_aux_vt1636_probe(struct via_aux_bus *bus);
+void via_aux_vt1632_probe(struct via_aux_bus *bus);
+void via_aux_vt1631_probe(struct via_aux_bus *bus);
+void via_aux_vt1625_probe(struct via_aux_bus *bus);
+void via_aux_vt1622_probe(struct via_aux_bus *bus);
+void via_aux_vt1621_probe(struct via_aux_bus *bus);
+
+
+#endif /* __VIA_AUX_H__ */
diff --git a/drivers/video/fbdev/via/via_aux_ch7301.c b/drivers/video/fbdev/via/via_aux_ch7301.c
new file mode 100644
index 0000000000..70852d06b5
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_ch7301.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for Chrontel CH7301 DVI Transmitter
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "CH7301 DVI Transmitter";
+
+
+static void probe(struct via_aux_bus *bus, u8 addr)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	addr,
+		.name	=	name};
+	u8 tmp;
+
+	if (!via_aux_read(&drv, 0x4B, &tmp, 1) || tmp != 0x17)
+		return;
+
+	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
+	via_aux_add(&drv);
+}
+
+void via_aux_ch7301_probe(struct via_aux_bus *bus)
+{
+	probe(bus, 0x75);
+	probe(bus, 0x76);
+}
diff --git a/drivers/video/fbdev/via/via_aux_edid.c b/drivers/video/fbdev/via/via_aux_edid.c
new file mode 100644
index 0000000000..9791381a98
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_edid.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * generic EDID driver
+ */
+
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include "via_aux.h"
+#include "../edid.h"
+
+
+static const char *name = "EDID";
+
+
+static void query_edid(struct via_aux_drv *drv)
+{
+	struct fb_monspecs *spec = drv->data;
+	unsigned char edid[EDID_LENGTH];
+	bool valid = false;
+
+	if (spec) {
+		fb_destroy_modedb(spec->modedb);
+	} else {
+		spec = kmalloc(sizeof(*spec), GFP_KERNEL);
+		if (!spec)
+			return;
+	}
+
+	spec->version = spec->revision = 0;
+	if (via_aux_read(drv, 0x00, edid, EDID_LENGTH)) {
+		fb_edid_to_monspecs(edid, spec);
+		valid = spec->version || spec->revision;
+	}
+
+	if (!valid) {
+		kfree(spec);
+		spec = NULL;
+	} else
+		printk(KERN_DEBUG "EDID: %s %s\n", spec->manufacturer, spec->monitor);
+
+	drv->data = spec;
+}
+
+static const struct fb_videomode *get_preferred_mode(struct via_aux_drv *drv)
+{
+	struct fb_monspecs *spec = drv->data;
+	int i;
+
+	if (!spec || !spec->modedb || !(spec->misc & FB_MISC_1ST_DETAIL))
+		return NULL;
+
+	for (i = 0; i < spec->modedb_len; i++) {
+		if (spec->modedb[i].flag & FB_MODE_IS_FIRST &&
+			spec->modedb[i].flag & FB_MODE_IS_DETAILED)
+			return &spec->modedb[i];
+	}
+
+	return NULL;
+}
+
+static void cleanup(struct via_aux_drv *drv)
+{
+	struct fb_monspecs *spec = drv->data;
+
+	if (spec)
+		fb_destroy_modedb(spec->modedb);
+}
+
+void via_aux_edid_probe(struct via_aux_bus *bus)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	0x50,
+		.name	=	name,
+		.cleanup	=	cleanup,
+		.get_preferred_mode	=	get_preferred_mode};
+
+	query_edid(&drv);
+
+	/* as EDID devices can be connected/disconnected just add the driver */
+	via_aux_add(&drv);
+}
diff --git a/drivers/video/fbdev/via/via_aux_sii164.c b/drivers/video/fbdev/via/via_aux_sii164.c
new file mode 100644
index 0000000000..90140b2715
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_sii164.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for Silicon Image SiI 164 PanelLink Transmitter
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "SiI 164 PanelLink Transmitter";
+
+
+static void probe(struct via_aux_bus *bus, u8 addr)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	addr,
+		.name	=	name};
+	/* check vendor id and device id */
+	const u8 id[] = {0x01, 0x00, 0x06, 0x00}, len = ARRAY_SIZE(id);
+	u8 tmp[ARRAY_SIZE(id)];
+
+	if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
+		return;
+
+	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
+	via_aux_add(&drv);
+}
+
+void via_aux_sii164_probe(struct via_aux_bus *bus)
+{
+	u8 i;
+
+	for (i = 0x38; i <= 0x3F; i++)
+		probe(bus, i);
+}
diff --git a/drivers/video/fbdev/via/via_aux_vt1621.c b/drivers/video/fbdev/via/via_aux_vt1621.c
new file mode 100644
index 0000000000..b05f4a3bae
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_vt1621.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for VIA VT1621(M) TV Encoder
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "VT1621(M) TV Encoder";
+
+
+void via_aux_vt1621_probe(struct via_aux_bus *bus)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	0x20,
+		.name	=	name};
+	u8 tmp;
+
+	if (!via_aux_read(&drv, 0x1B, &tmp, 1) || tmp != 0x02)
+		return;
+
+	printk(KERN_INFO "viafb: Found %s\n", name);
+	via_aux_add(&drv);
+}
diff --git a/drivers/video/fbdev/via/via_aux_vt1622.c b/drivers/video/fbdev/via/via_aux_vt1622.c
new file mode 100644
index 0000000000..14ed319177
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_vt1622.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for VIA VT1622(M) Digital TV Encoder
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "VT1622(M) Digital TV Encoder";
+
+
+static void probe(struct via_aux_bus *bus, u8 addr)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	addr,
+		.name	=	name};
+	u8 tmp;
+
+	if (!via_aux_read(&drv, 0x1B, &tmp, 1) ||  tmp != 0x03)
+		return;
+
+	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
+	via_aux_add(&drv);
+}
+
+void via_aux_vt1622_probe(struct via_aux_bus *bus)
+{
+	probe(bus, 0x20);
+	probe(bus, 0x21);
+}
diff --git a/drivers/video/fbdev/via/via_aux_vt1625.c b/drivers/video/fbdev/via/via_aux_vt1625.c
new file mode 100644
index 0000000000..f7456453ae
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_vt1625.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for VIA VT1625(M) HDTV Encoder
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "VT1625(M) HDTV Encoder";
+
+
+static void probe(struct via_aux_bus *bus, u8 addr)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	addr,
+		.name	=	name};
+	u8 tmp;
+
+	if (!via_aux_read(&drv, 0x1B, &tmp, 1) || tmp != 0x50)
+		return;
+
+	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
+	via_aux_add(&drv);
+}
+
+void via_aux_vt1625_probe(struct via_aux_bus *bus)
+{
+	probe(bus, 0x20);
+	probe(bus, 0x21);
+}
diff --git a/drivers/video/fbdev/via/via_aux_vt1631.c b/drivers/video/fbdev/via/via_aux_vt1631.c
new file mode 100644
index 0000000000..51595a3f8f
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_vt1631.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for VIA VT1631 LVDS Transmitter
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "VT1631 LVDS Transmitter";
+
+
+void via_aux_vt1631_probe(struct via_aux_bus *bus)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	0x38,
+		.name	=	name};
+	/* check vendor id and device id */
+	const u8 id[] = {0x06, 0x11, 0x91, 0x31}, len = ARRAY_SIZE(id);
+	u8 tmp[ARRAY_SIZE(id)];
+
+	if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
+		return;
+
+	printk(KERN_INFO "viafb: Found %s\n", name);
+	via_aux_add(&drv);
+}
diff --git a/drivers/video/fbdev/via/via_aux_vt1632.c b/drivers/video/fbdev/via/via_aux_vt1632.c
new file mode 100644
index 0000000000..72f286ae64
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_vt1632.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for VIA VT1632 DVI Transmitter
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "VT1632 DVI Transmitter";
+
+
+static void probe(struct via_aux_bus *bus, u8 addr)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	addr,
+		.name	=	name};
+	/* check vendor id and device id */
+	const u8 id[] = {0x06, 0x11, 0x92, 0x31}, len = ARRAY_SIZE(id);
+	u8 tmp[ARRAY_SIZE(id)];
+
+	if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
+		return;
+
+	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
+	via_aux_add(&drv);
+}
+
+void via_aux_vt1632_probe(struct via_aux_bus *bus)
+{
+	u8 i;
+
+	for (i = 0x08; i <= 0x0F; i++)
+		probe(bus, i);
+}
diff --git a/drivers/video/fbdev/via/via_aux_vt1636.c b/drivers/video/fbdev/via/via_aux_vt1636.c
new file mode 100644
index 0000000000..1bda5549d4
--- /dev/null
+++ b/drivers/video/fbdev/via/via_aux_vt1636.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * driver for VIA VT1636 LVDS Transmitter
+ */
+
+#include <linux/slab.h>
+#include "via_aux.h"
+
+
+static const char *name = "VT1636 LVDS Transmitter";
+
+
+void via_aux_vt1636_probe(struct via_aux_bus *bus)
+{
+	struct via_aux_drv drv = {
+		.bus	=	bus,
+		.addr	=	0x40,
+		.name	=	name};
+	/* check vendor id and device id */
+	const u8 id[] = {0x06, 0x11, 0x45, 0x33}, len = ARRAY_SIZE(id);
+	u8 tmp[ARRAY_SIZE(id)];
+
+	if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
+		return;
+
+	printk(KERN_INFO "viafb: Found %s\n", name);
+	via_aux_add(&drv);
+}
diff --git a/drivers/video/fbdev/via/via_clock.c b/drivers/video/fbdev/via/via_clock.c
new file mode 100644
index 0000000000..e01a2dfaab
--- /dev/null
+++ b/drivers/video/fbdev/via/via_clock.c
@@ -0,0 +1,353 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * clock and PLL management functions
+ */
+
+#include <linux/kernel.h>
+#include <linux/via-core.h>
+
+#include "via_clock.h"
+#include "global.h"
+#include "debug.h"
+
+static const char *via_slap = "Please slap VIA Technologies to motivate them "
+	"releasing full documentation for your platform!\n";
+
+static inline u32 cle266_encode_pll(struct via_pll_config pll)
+{
+	return (pll.multiplier << 8)
+		| (pll.rshift << 6)
+		| pll.divisor;
+}
+
+static inline u32 k800_encode_pll(struct via_pll_config pll)
+{
+	return ((pll.divisor - 2) << 16)
+		| (pll.rshift << 10)
+		| (pll.multiplier - 2);
+}
+
+static inline u32 vx855_encode_pll(struct via_pll_config pll)
+{
+	return (pll.divisor << 16)
+		| (pll.rshift << 10)
+		| pll.multiplier;
+}
+
+static inline void cle266_set_primary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x02, 0x02); /* enable reset */
+	via_write_reg(VIASR, 0x46, data & 0xFF);
+	via_write_reg(VIASR, 0x47, (data >> 8) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x02); /* disable reset */
+}
+
+static inline void k800_set_primary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x02, 0x02); /* enable reset */
+	via_write_reg(VIASR, 0x44, data & 0xFF);
+	via_write_reg(VIASR, 0x45, (data >> 8) & 0xFF);
+	via_write_reg(VIASR, 0x46, (data >> 16) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x02); /* disable reset */
+}
+
+static inline void cle266_set_secondary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x04, 0x04); /* enable reset */
+	via_write_reg(VIASR, 0x44, data & 0xFF);
+	via_write_reg(VIASR, 0x45, (data >> 8) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x04); /* disable reset */
+}
+
+static inline void k800_set_secondary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x04, 0x04); /* enable reset */
+	via_write_reg(VIASR, 0x4A, data & 0xFF);
+	via_write_reg(VIASR, 0x4B, (data >> 8) & 0xFF);
+	via_write_reg(VIASR, 0x4C, (data >> 16) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x04); /* disable reset */
+}
+
+static inline void set_engine_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x01, 0x01); /* enable reset */
+	via_write_reg(VIASR, 0x47, data & 0xFF);
+	via_write_reg(VIASR, 0x48, (data >> 8) & 0xFF);
+	via_write_reg(VIASR, 0x49, (data >> 16) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x01); /* disable reset */
+}
+
+static void cle266_set_primary_pll(struct via_pll_config config)
+{
+	cle266_set_primary_pll_encoded(cle266_encode_pll(config));
+}
+
+static void k800_set_primary_pll(struct via_pll_config config)
+{
+	k800_set_primary_pll_encoded(k800_encode_pll(config));
+}
+
+static void vx855_set_primary_pll(struct via_pll_config config)
+{
+	k800_set_primary_pll_encoded(vx855_encode_pll(config));
+}
+
+static void cle266_set_secondary_pll(struct via_pll_config config)
+{
+	cle266_set_secondary_pll_encoded(cle266_encode_pll(config));
+}
+
+static void k800_set_secondary_pll(struct via_pll_config config)
+{
+	k800_set_secondary_pll_encoded(k800_encode_pll(config));
+}
+
+static void vx855_set_secondary_pll(struct via_pll_config config)
+{
+	k800_set_secondary_pll_encoded(vx855_encode_pll(config));
+}
+
+static void k800_set_engine_pll(struct via_pll_config config)
+{
+	set_engine_pll_encoded(k800_encode_pll(config));
+}
+
+static void vx855_set_engine_pll(struct via_pll_config config)
+{
+	set_engine_pll_encoded(vx855_encode_pll(config));
+}
+
+static void set_primary_pll_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x20;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2D, value, 0x30);
+}
+
+static void set_secondary_pll_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x08;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2D, value, 0x0C);
+}
+
+static void set_engine_pll_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x02;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2D, value, 0x03);
+}
+
+static void set_primary_clock_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x20;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x1B, value, 0x30);
+}
+
+static void set_secondary_clock_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x80;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x1B, value, 0xC0);
+}
+
+static inline u8 set_clock_source_common(enum via_clksrc source, bool use_pll)
+{
+	u8 data = 0;
+
+	switch (source) {
+	case VIA_CLKSRC_X1:
+		data = 0x00;
+		break;
+	case VIA_CLKSRC_TVX1:
+		data = 0x02;
+		break;
+	case VIA_CLKSRC_TVPLL:
+		data = 0x04; /* 0x06 should be the same */
+		break;
+	case VIA_CLKSRC_DVP1TVCLKR:
+		data = 0x0A;
+		break;
+	case VIA_CLKSRC_CAP0:
+		data = 0xC;
+		break;
+	case VIA_CLKSRC_CAP1:
+		data = 0x0E;
+		break;
+	}
+
+	if (!use_pll)
+		data |= 1;
+
+	return data;
+}
+
+static void set_primary_clock_source(enum via_clksrc source, bool use_pll)
+{
+	u8 data = set_clock_source_common(source, use_pll) << 4;
+	via_write_reg_mask(VIACR, 0x6C, data, 0xF0);
+}
+
+static void set_secondary_clock_source(enum via_clksrc source, bool use_pll)
+{
+	u8 data = set_clock_source_common(source, use_pll);
+	via_write_reg_mask(VIACR, 0x6C, data, 0x0F);
+}
+
+static void dummy_set_clock_state(u8 state)
+{
+	printk(KERN_INFO "Using undocumented set clock state.\n%s", via_slap);
+}
+
+static void dummy_set_clock_source(enum via_clksrc source, bool use_pll)
+{
+	printk(KERN_INFO "Using undocumented set clock source.\n%s", via_slap);
+}
+
+static void dummy_set_pll_state(u8 state)
+{
+	printk(KERN_INFO "Using undocumented set PLL state.\n%s", via_slap);
+}
+
+static void dummy_set_pll(struct via_pll_config config)
+{
+	printk(KERN_INFO "Using undocumented set PLL.\n%s", via_slap);
+}
+
+static void noop_set_clock_state(u8 state)
+{
+}
+
+void via_clock_init(struct via_clock *clock, int gfx_chip)
+{
+	switch (gfx_chip) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+		clock->set_primary_clock_state = dummy_set_clock_state;
+		clock->set_primary_clock_source = dummy_set_clock_source;
+		clock->set_primary_pll_state = dummy_set_pll_state;
+		clock->set_primary_pll = cle266_set_primary_pll;
+
+		clock->set_secondary_clock_state = dummy_set_clock_state;
+		clock->set_secondary_clock_source = dummy_set_clock_source;
+		clock->set_secondary_pll_state = dummy_set_pll_state;
+		clock->set_secondary_pll = cle266_set_secondary_pll;
+
+		clock->set_engine_pll_state = dummy_set_pll_state;
+		clock->set_engine_pll = dummy_set_pll;
+		break;
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+	case UNICHROME_CX700:
+	case UNICHROME_CN750:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+	case UNICHROME_VX800:
+		clock->set_primary_clock_state = set_primary_clock_state;
+		clock->set_primary_clock_source = set_primary_clock_source;
+		clock->set_primary_pll_state = set_primary_pll_state;
+		clock->set_primary_pll = k800_set_primary_pll;
+
+		clock->set_secondary_clock_state = set_secondary_clock_state;
+		clock->set_secondary_clock_source = set_secondary_clock_source;
+		clock->set_secondary_pll_state = set_secondary_pll_state;
+		clock->set_secondary_pll = k800_set_secondary_pll;
+
+		clock->set_engine_pll_state = set_engine_pll_state;
+		clock->set_engine_pll = k800_set_engine_pll;
+		break;
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		clock->set_primary_clock_state = set_primary_clock_state;
+		clock->set_primary_clock_source = set_primary_clock_source;
+		clock->set_primary_pll_state = set_primary_pll_state;
+		clock->set_primary_pll = vx855_set_primary_pll;
+
+		clock->set_secondary_clock_state = set_secondary_clock_state;
+		clock->set_secondary_clock_source = set_secondary_clock_source;
+		clock->set_secondary_pll_state = set_secondary_pll_state;
+		clock->set_secondary_pll = vx855_set_secondary_pll;
+
+		clock->set_engine_pll_state = set_engine_pll_state;
+		clock->set_engine_pll = vx855_set_engine_pll;
+		break;
+
+	}
+
+	if (machine_is_olpc()) {
+		/* The OLPC XO-1.5 cannot suspend/resume reliably if the
+		 * IGA1/IGA2 clocks are set as on or off (memory rot
+		 * occasionally happens during suspend under such
+		 * configurations).
+		 *
+		 * The only known stable scenario is to leave this bits as-is,
+		 * which in their default states are documented to enable the
+		 * clock only when it is needed.
+		 */
+		clock->set_primary_clock_state = noop_set_clock_state;
+		clock->set_secondary_clock_state = noop_set_clock_state;
+	}
+}
diff --git a/drivers/video/fbdev/via/via_clock.h b/drivers/video/fbdev/via/via_clock.h
new file mode 100644
index 0000000000..4d88fd6cde
--- /dev/null
+++ b/drivers/video/fbdev/via/via_clock.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * clock and PLL management functions
+ */
+
+#ifndef __VIA_CLOCK_H__
+#define __VIA_CLOCK_H__
+
+#include <linux/types.h>
+
+enum via_clksrc {
+	VIA_CLKSRC_X1 = 0,
+	VIA_CLKSRC_TVX1,
+	VIA_CLKSRC_TVPLL,
+	VIA_CLKSRC_DVP1TVCLKR,
+	VIA_CLKSRC_CAP0,
+	VIA_CLKSRC_CAP1,
+};
+
+struct via_pll_config {
+	u16 multiplier;
+	u8 divisor;
+	u8 rshift;
+};
+
+struct via_clock {
+	void (*set_primary_clock_state)(u8 state);
+	void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll);
+	void (*set_primary_pll_state)(u8 state);
+	void (*set_primary_pll)(struct via_pll_config config);
+
+	void (*set_secondary_clock_state)(u8 state);
+	void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll);
+	void (*set_secondary_pll_state)(u8 state);
+	void (*set_secondary_pll)(struct via_pll_config config);
+
+	void (*set_engine_pll_state)(u8 state);
+	void (*set_engine_pll)(struct via_pll_config config);
+};
+
+
+static inline u32 get_pll_internal_frequency(u32 ref_freq,
+	struct via_pll_config pll)
+{
+	return ref_freq / pll.divisor * pll.multiplier;
+}
+
+static inline u32 get_pll_output_frequency(u32 ref_freq,
+	struct via_pll_config pll)
+{
+	return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift;
+}
+
+void via_clock_init(struct via_clock *clock, int gfx_chip);
+
+#endif /* __VIA_CLOCK_H__ */
diff --git a/drivers/video/fbdev/via/via_i2c.c b/drivers/video/fbdev/via/via_i2c.c
new file mode 100644
index 0000000000..c35e530e0e
--- /dev/null
+++ b/drivers/video/fbdev/via/via_i2c.c
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+
+/*
+ * There can only be one set of these, so there's no point in having
+ * them be dynamically allocated...
+ */
+#define VIAFB_NUM_I2C		5
+static struct via_i2c_stuff via_i2c_par[VIAFB_NUM_I2C];
+static struct viafb_dev *i2c_vdev;  /* Passed in from core */
+
+static void via_i2c_setscl(void *data, int state)
+{
+	u8 val;
+	struct via_port_cfg *adap_data = data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
+	val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
+	if (state)
+		val |= 0x20;
+	else
+		val &= ~0x20;
+	switch (adap_data->type) {
+	case VIA_PORT_I2C:
+		val |= 0x01;
+		break;
+	case VIA_PORT_GPIO:
+		val |= 0x82;
+		break;
+	default:
+		printk(KERN_ERR "viafb_i2c: specify wrong i2c type.\n");
+	}
+	via_write_reg(adap_data->io_port, adap_data->ioport_index, val);
+	spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
+}
+
+static int via_i2c_getscl(void *data)
+{
+	struct via_port_cfg *adap_data = data;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
+	if (adap_data->type == VIA_PORT_GPIO)
+		via_write_reg_mask(adap_data->io_port, adap_data->ioport_index,
+			0, 0x80);
+	if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
+		ret = 1;
+	spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
+	return ret;
+}
+
+static int via_i2c_getsda(void *data)
+{
+	struct via_port_cfg *adap_data = data;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
+	if (adap_data->type == VIA_PORT_GPIO)
+		via_write_reg_mask(adap_data->io_port, adap_data->ioport_index,
+			0, 0x40);
+	if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
+		ret = 1;
+	spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
+	return ret;
+}
+
+static void via_i2c_setsda(void *data, int state)
+{
+	u8 val;
+	struct via_port_cfg *adap_data = data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
+	val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
+	if (state)
+		val |= 0x10;
+	else
+		val &= ~0x10;
+	switch (adap_data->type) {
+	case VIA_PORT_I2C:
+		val |= 0x01;
+		break;
+	case VIA_PORT_GPIO:
+		val |= 0x42;
+		break;
+	default:
+		printk(KERN_ERR "viafb_i2c: specify wrong i2c type.\n");
+	}
+	via_write_reg(adap_data->io_port, adap_data->ioport_index, val);
+	spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
+}
+
+int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata)
+{
+	int ret;
+	u8 mm1[] = {0x00};
+	struct i2c_msg msgs[2];
+
+	if (!via_i2c_par[adap].is_active)
+		return -ENODEV;
+	*pdata = 0;
+	msgs[0].flags = 0;
+	msgs[1].flags = I2C_M_RD;
+	msgs[0].addr = msgs[1].addr = slave_addr / 2;
+	mm1[0] = index;
+	msgs[0].len = 1; msgs[1].len = 1;
+	msgs[0].buf = mm1; msgs[1].buf = pdata;
+	ret = i2c_transfer(&via_i2c_par[adap].adapter, msgs, 2);
+	if (ret == 2)
+		ret = 0;
+	else if (ret >= 0)
+		ret = -EIO;
+
+	return ret;
+}
+
+int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data)
+{
+	int ret;
+	u8 msg[2] = { index, data };
+	struct i2c_msg msgs;
+
+	if (!via_i2c_par[adap].is_active)
+		return -ENODEV;
+	msgs.flags = 0;
+	msgs.addr = slave_addr / 2;
+	msgs.len = 2;
+	msgs.buf = msg;
+	ret = i2c_transfer(&via_i2c_par[adap].adapter, &msgs, 1);
+	if (ret == 1)
+		ret = 0;
+	else if (ret >= 0)
+		ret = -EIO;
+
+	return ret;
+}
+
+int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len)
+{
+	int ret;
+	u8 mm1[] = {0x00};
+	struct i2c_msg msgs[2];
+
+	if (!via_i2c_par[adap].is_active)
+		return -ENODEV;
+	msgs[0].flags = 0;
+	msgs[1].flags = I2C_M_RD;
+	msgs[0].addr = msgs[1].addr = slave_addr / 2;
+	mm1[0] = index;
+	msgs[0].len = 1; msgs[1].len = buff_len;
+	msgs[0].buf = mm1; msgs[1].buf = buff;
+	ret = i2c_transfer(&via_i2c_par[adap].adapter, msgs, 2);
+	if (ret == 2)
+		ret = 0;
+	else if (ret >= 0)
+		ret = -EIO;
+
+	return ret;
+}
+
+/*
+ * Allow other viafb subdevices to look up a specific adapter
+ * by port name.
+ */
+struct i2c_adapter *viafb_find_i2c_adapter(enum viafb_i2c_adap which)
+{
+	struct via_i2c_stuff *stuff = &via_i2c_par[which];
+
+	return &stuff->adapter;
+}
+EXPORT_SYMBOL_GPL(viafb_find_i2c_adapter);
+
+
+static int create_i2c_bus(struct i2c_adapter *adapter,
+			  struct i2c_algo_bit_data *algo,
+			  struct via_port_cfg *adap_cfg,
+			  struct pci_dev *pdev)
+{
+	algo->setsda = via_i2c_setsda;
+	algo->setscl = via_i2c_setscl;
+	algo->getsda = via_i2c_getsda;
+	algo->getscl = via_i2c_getscl;
+	algo->udelay = 10;
+	algo->timeout = 2;
+	algo->data = adap_cfg;
+
+	sprintf(adapter->name, "viafb i2c io_port idx 0x%02x",
+		adap_cfg->ioport_index);
+	adapter->owner = THIS_MODULE;
+	adapter->class = I2C_CLASS_DDC;
+	adapter->algo_data = algo;
+	if (pdev)
+		adapter->dev.parent = &pdev->dev;
+	else
+		adapter->dev.parent = NULL;
+	/* i2c_set_adapdata(adapter, adap_cfg); */
+
+	/* Raise SCL and SDA */
+	via_i2c_setsda(adap_cfg, 1);
+	via_i2c_setscl(adap_cfg, 1);
+	udelay(20);
+
+	return i2c_bit_add_bus(adapter);
+}
+
+static int viafb_i2c_probe(struct platform_device *platdev)
+{
+	int i, ret;
+	struct via_port_cfg *configs;
+
+	i2c_vdev = platdev->dev.platform_data;
+	configs = i2c_vdev->port_cfg;
+
+	for (i = 0; i < VIAFB_NUM_PORTS; i++) {
+		struct via_port_cfg *adap_cfg = configs++;
+		struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i];
+
+		i2c_stuff->is_active = 0;
+		if (adap_cfg->type == 0 || adap_cfg->mode != VIA_MODE_I2C)
+			continue;
+		ret = create_i2c_bus(&i2c_stuff->adapter,
+				     &i2c_stuff->algo, adap_cfg,
+				NULL); /* FIXME: PCIDEV */
+		if (ret < 0) {
+			printk(KERN_ERR "viafb: cannot create i2c bus %u:%d\n",
+				i, ret);
+			continue;  /* Still try to make the rest */
+		}
+		i2c_stuff->is_active = 1;
+	}
+
+	return 0;
+}
+
+static void viafb_i2c_remove(struct platform_device *platdev)
+{
+	int i;
+
+	for (i = 0; i < VIAFB_NUM_PORTS; i++) {
+		struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i];
+		/*
+		 * Only remove those entries in the array that we've
+		 * actually used (and thus initialized algo_data)
+		 */
+		if (i2c_stuff->is_active)
+			i2c_del_adapter(&i2c_stuff->adapter);
+	}
+}
+
+static struct platform_driver via_i2c_driver = {
+	.driver = {
+		.name = "viafb-i2c",
+	},
+	.probe = viafb_i2c_probe,
+	.remove_new = viafb_i2c_remove,
+};
+
+int viafb_i2c_init(void)
+{
+	return platform_driver_register(&via_i2c_driver);
+}
+
+void viafb_i2c_exit(void)
+{
+	platform_driver_unregister(&via_i2c_driver);
+}
diff --git a/drivers/video/fbdev/via/via_modesetting.c b/drivers/video/fbdev/via/via_modesetting.c
new file mode 100644
index 0000000000..47dccc8ebd
--- /dev/null
+++ b/drivers/video/fbdev/via/via_modesetting.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * basic modesetting functions
+ */
+
+#include <linux/kernel.h>
+#include <linux/via-core.h>
+#include "via_modesetting.h"
+#include "share.h"
+#include "debug.h"
+
+
+void via_set_primary_timing(const struct via_display_timing *timing)
+{
+	struct via_display_timing raw;
+
+	raw.hor_total = timing->hor_total / 8 - 5;
+	raw.hor_addr = timing->hor_addr / 8 - 1;
+	raw.hor_blank_start = timing->hor_blank_start / 8 - 1;
+	raw.hor_blank_end = timing->hor_blank_end / 8 - 1;
+	raw.hor_sync_start = timing->hor_sync_start / 8;
+	raw.hor_sync_end = timing->hor_sync_end / 8;
+	raw.ver_total = timing->ver_total - 2;
+	raw.ver_addr = timing->ver_addr - 1;
+	raw.ver_blank_start = timing->ver_blank_start - 1;
+	raw.ver_blank_end = timing->ver_blank_end - 1;
+	raw.ver_sync_start = timing->ver_sync_start - 1;
+	raw.ver_sync_end = timing->ver_sync_end - 1;
+
+	/* unlock timing registers */
+	via_write_reg_mask(VIACR, 0x11, 0x00, 0x80);
+
+	via_write_reg(VIACR, 0x00, raw.hor_total & 0xFF);
+	via_write_reg(VIACR, 0x01, raw.hor_addr & 0xFF);
+	via_write_reg(VIACR, 0x02, raw.hor_blank_start & 0xFF);
+	via_write_reg_mask(VIACR, 0x03, raw.hor_blank_end & 0x1F, 0x1F);
+	via_write_reg(VIACR, 0x04, raw.hor_sync_start & 0xFF);
+	via_write_reg_mask(VIACR, 0x05, (raw.hor_sync_end & 0x1F)
+		| (raw.hor_blank_end << (7 - 5) & 0x80), 0x9F);
+	via_write_reg(VIACR, 0x06, raw.ver_total & 0xFF);
+	via_write_reg_mask(VIACR, 0x07, (raw.ver_total >> 8 & 0x01)
+		| (raw.ver_addr >> (8 - 1) & 0x02)
+		| (raw.ver_sync_start >> (8 - 2) & 0x04)
+		| (raw.ver_blank_start >> (8 - 3) & 0x08)
+		| (raw.ver_total >> (9 - 5) & 0x20)
+		| (raw.ver_addr >> (9 - 6) & 0x40)
+		| (raw.ver_sync_start >> (9 - 7) & 0x80), 0xEF);
+	via_write_reg_mask(VIACR, 0x09, raw.ver_blank_start >> (9 - 5) & 0x20,
+		0x20);
+	via_write_reg(VIACR, 0x10, raw.ver_sync_start & 0xFF);
+	via_write_reg_mask(VIACR, 0x11, raw.ver_sync_end & 0x0F, 0x0F);
+	via_write_reg(VIACR, 0x12, raw.ver_addr & 0xFF);
+	via_write_reg(VIACR, 0x15, raw.ver_blank_start & 0xFF);
+	via_write_reg(VIACR, 0x16, raw.ver_blank_end & 0xFF);
+	via_write_reg_mask(VIACR, 0x33, (raw.hor_sync_start >> (8 - 4) & 0x10)
+		| (raw.hor_blank_end >> (6 - 5) & 0x20), 0x30);
+	via_write_reg_mask(VIACR, 0x35, (raw.ver_total >> 10 & 0x01)
+		| (raw.ver_sync_start >> (10 - 1) & 0x02)
+		| (raw.ver_addr >> (10 - 2) & 0x04)
+		| (raw.ver_blank_start >> (10 - 3) & 0x08), 0x0F);
+	via_write_reg_mask(VIACR, 0x36, raw.hor_total >> (8 - 3) & 0x08, 0x08);
+
+	/* lock timing registers */
+	via_write_reg_mask(VIACR, 0x11, 0x80, 0x80);
+
+	/* reset timing control */
+	via_write_reg_mask(VIACR, 0x17, 0x00, 0x80);
+	via_write_reg_mask(VIACR, 0x17, 0x80, 0x80);
+}
+
+void via_set_secondary_timing(const struct via_display_timing *timing)
+{
+	struct via_display_timing raw;
+
+	raw.hor_total = timing->hor_total - 1;
+	raw.hor_addr = timing->hor_addr - 1;
+	raw.hor_blank_start = timing->hor_blank_start - 1;
+	raw.hor_blank_end = timing->hor_blank_end - 1;
+	raw.hor_sync_start = timing->hor_sync_start - 1;
+	raw.hor_sync_end = timing->hor_sync_end - 1;
+	raw.ver_total = timing->ver_total - 1;
+	raw.ver_addr = timing->ver_addr - 1;
+	raw.ver_blank_start = timing->ver_blank_start - 1;
+	raw.ver_blank_end = timing->ver_blank_end - 1;
+	raw.ver_sync_start = timing->ver_sync_start - 1;
+	raw.ver_sync_end = timing->ver_sync_end - 1;
+
+	via_write_reg(VIACR, 0x50, raw.hor_total & 0xFF);
+	via_write_reg(VIACR, 0x51, raw.hor_addr & 0xFF);
+	via_write_reg(VIACR, 0x52, raw.hor_blank_start & 0xFF);
+	via_write_reg(VIACR, 0x53, raw.hor_blank_end & 0xFF);
+	via_write_reg(VIACR, 0x54, (raw.hor_blank_start >> 8 & 0x07)
+		| (raw.hor_blank_end >> (8 - 3) & 0x38)
+		| (raw.hor_sync_start >> (8 - 6) & 0xC0));
+	via_write_reg_mask(VIACR, 0x55, (raw.hor_total >> 8 & 0x0F)
+		| (raw.hor_addr >> (8 - 4) & 0x70), 0x7F);
+	via_write_reg(VIACR, 0x56, raw.hor_sync_start & 0xFF);
+	via_write_reg(VIACR, 0x57, raw.hor_sync_end & 0xFF);
+	via_write_reg(VIACR, 0x58, raw.ver_total & 0xFF);
+	via_write_reg(VIACR, 0x59, raw.ver_addr & 0xFF);
+	via_write_reg(VIACR, 0x5A, raw.ver_blank_start & 0xFF);
+	via_write_reg(VIACR, 0x5B, raw.ver_blank_end & 0xFF);
+	via_write_reg(VIACR, 0x5C, (raw.ver_blank_start >> 8 & 0x07)
+		| (raw.ver_blank_end >> (8 - 3) & 0x38)
+		| (raw.hor_sync_end >> (8 - 6) & 0x40)
+		| (raw.hor_sync_start >> (10 - 7) & 0x80));
+	via_write_reg(VIACR, 0x5D, (raw.ver_total >> 8 & 0x07)
+		| (raw.ver_addr >> (8 - 3) & 0x38)
+		| (raw.hor_blank_end >> (11 - 6) & 0x40)
+		| (raw.hor_sync_start >> (11 - 7) & 0x80));
+	via_write_reg(VIACR, 0x5E, raw.ver_sync_start & 0xFF);
+	via_write_reg(VIACR, 0x5F, (raw.ver_sync_end & 0x1F)
+		| (raw.ver_sync_start >> (8 - 5) & 0xE0));
+}
+
+void via_set_primary_address(u32 addr)
+{
+	DEBUG_MSG(KERN_DEBUG "via_set_primary_address(0x%08X)\n", addr);
+	via_write_reg(VIACR, 0x0D, addr & 0xFF);
+	via_write_reg(VIACR, 0x0C, (addr >> 8) & 0xFF);
+	via_write_reg(VIACR, 0x34, (addr >> 16) & 0xFF);
+	via_write_reg_mask(VIACR, 0x48, (addr >> 24) & 0x1F, 0x1F);
+}
+
+void via_set_secondary_address(u32 addr)
+{
+	DEBUG_MSG(KERN_DEBUG "via_set_secondary_address(0x%08X)\n", addr);
+	/* secondary display supports only quadword aligned memory */
+	via_write_reg_mask(VIACR, 0x62, (addr >> 2) & 0xFE, 0xFE);
+	via_write_reg(VIACR, 0x63, (addr >> 10) & 0xFF);
+	via_write_reg(VIACR, 0x64, (addr >> 18) & 0xFF);
+	via_write_reg_mask(VIACR, 0xA3, (addr >> 26) & 0x07, 0x07);
+}
+
+void via_set_primary_pitch(u32 pitch)
+{
+	DEBUG_MSG(KERN_DEBUG "via_set_primary_pitch(0x%08X)\n", pitch);
+	/* spec does not say that first adapter skips 3 bits but old
+	 * code did it and seems to be reasonable in analogy to 2nd adapter
+	 */
+	pitch = pitch >> 3;
+	via_write_reg(VIACR, 0x13, pitch & 0xFF);
+	via_write_reg_mask(VIACR, 0x35, (pitch >> (8 - 5)) & 0xE0, 0xE0);
+}
+
+void via_set_secondary_pitch(u32 pitch)
+{
+	DEBUG_MSG(KERN_DEBUG "via_set_secondary_pitch(0x%08X)\n", pitch);
+	pitch = pitch >> 3;
+	via_write_reg(VIACR, 0x66, pitch & 0xFF);
+	via_write_reg_mask(VIACR, 0x67, (pitch >> 8) & 0x03, 0x03);
+	via_write_reg_mask(VIACR, 0x71, (pitch >> (10 - 7)) & 0x80, 0x80);
+}
+
+void via_set_primary_color_depth(u8 depth)
+{
+	u8 value;
+
+	DEBUG_MSG(KERN_DEBUG "via_set_primary_color_depth(%d)\n", depth);
+	switch (depth) {
+	case 8:
+		value = 0x00;
+		break;
+	case 15:
+		value = 0x04;
+		break;
+	case 16:
+		value = 0x14;
+		break;
+	case 24:
+		value = 0x0C;
+		break;
+	case 30:
+		value = 0x08;
+		break;
+	default:
+		printk(KERN_WARNING "via_set_primary_color_depth: "
+			"Unsupported depth: %d\n", depth);
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x15, value, 0x1C);
+}
+
+void via_set_secondary_color_depth(u8 depth)
+{
+	u8 value;
+
+	DEBUG_MSG(KERN_DEBUG "via_set_secondary_color_depth(%d)\n", depth);
+	switch (depth) {
+	case 8:
+		value = 0x00;
+		break;
+	case 16:
+		value = 0x40;
+		break;
+	case 24:
+		value = 0xC0;
+		break;
+	case 30:
+		value = 0x80;
+		break;
+	default:
+		printk(KERN_WARNING "via_set_secondary_color_depth: "
+			"Unsupported depth: %d\n", depth);
+		return;
+	}
+
+	via_write_reg_mask(VIACR, 0x67, value, 0xC0);
+}
diff --git a/drivers/video/fbdev/via/via_modesetting.h b/drivers/video/fbdev/via/via_modesetting.h
new file mode 100644
index 0000000000..2a6f5abd3c
--- /dev/null
+++ b/drivers/video/fbdev/via/via_modesetting.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ */
+/*
+ * basic modesetting functions
+ */
+
+#ifndef __VIA_MODESETTING_H__
+#define __VIA_MODESETTING_H__
+
+#include <linux/types.h>
+
+
+#define VIA_PITCH_SIZE	(1<<3)
+#define VIA_PITCH_MAX	0x3FF8
+
+
+struct via_display_timing {
+	u16 hor_total;
+	u16 hor_addr;
+	u16 hor_blank_start;
+	u16 hor_blank_end;
+	u16 hor_sync_start;
+	u16 hor_sync_end;
+	u16 ver_total;
+	u16 ver_addr;
+	u16 ver_blank_start;
+	u16 ver_blank_end;
+	u16 ver_sync_start;
+	u16 ver_sync_end;
+};
+
+
+void via_set_primary_timing(const struct via_display_timing *timing);
+void via_set_secondary_timing(const struct via_display_timing *timing);
+void via_set_primary_address(u32 addr);
+void via_set_secondary_address(u32 addr);
+void via_set_primary_pitch(u32 pitch);
+void via_set_secondary_pitch(u32 pitch);
+void via_set_primary_color_depth(u8 depth);
+void via_set_secondary_color_depth(u8 depth);
+
+#endif /* __VIA_MODESETTING_H__ */
diff --git a/drivers/video/fbdev/via/via_utility.c b/drivers/video/fbdev/via/via_utility.c
new file mode 100644
index 0000000000..c5277a6758
--- /dev/null
+++ b/drivers/video/fbdev/via/via_utility.c
@@ -0,0 +1,228 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include <linux/via-core.h>
+#include "global.h"
+
+void viafb_get_device_support_state(u32 *support_state)
+{
+	*support_state = CRT_Device;
+
+	if (viaparinfo->chip_info->tmds_chip_info.tmds_chip_name == VT1632_TMDS)
+		*support_state |= DVI_Device;
+
+	if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name == VT1631_LVDS)
+		*support_state |= LCD_Device;
+}
+
+void viafb_get_device_connect_state(u32 *connect_state)
+{
+	bool mobile = false;
+
+	*connect_state = CRT_Device;
+
+	if (viafb_dvi_sense())
+		*connect_state |= DVI_Device;
+
+	viafb_lcd_get_mobile_state(&mobile);
+	if (mobile)
+		*connect_state |= LCD_Device;
+}
+
+bool viafb_lcd_get_support_expand_state(u32 xres, u32 yres)
+{
+	unsigned int support_state = 0;
+
+	switch (viafb_lcd_panel_id) {
+	case LCD_PANEL_ID0_640X480:
+		if ((xres < 640) && (yres < 480))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID1_800X600:
+		if ((xres < 800) && (yres < 600))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID2_1024X768:
+		if ((xres < 1024) && (yres < 768))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID3_1280X768:
+		if ((xres < 1280) && (yres < 768))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID4_1280X1024:
+		if ((xres < 1280) && (yres < 1024))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID5_1400X1050:
+		if ((xres < 1400) && (yres < 1050))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID6_1600X1200:
+		if ((xres < 1600) && (yres < 1200))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID7_1366X768:
+		if ((xres < 1366) && (yres < 768))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID8_1024X600:
+		if ((xres < 1024) && (yres < 600))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_ID9_1280X800:
+		if ((xres < 1280) && (yres < 800))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_IDA_800X480:
+		if ((xres < 800) && (yres < 480))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_IDB_1360X768:
+		if ((xres < 1360) && (yres < 768))
+			support_state = true;
+		break;
+
+	case LCD_PANEL_IDC_480X640:
+		if ((xres < 480) && (yres < 640))
+			support_state = true;
+		break;
+
+	default:
+		support_state = false;
+		break;
+	}
+
+	return support_state;
+}
+
+/*====================================================================*/
+/*                      Gamma Function Implementation*/
+/*====================================================================*/
+
+void viafb_set_gamma_table(int bpp, unsigned int *gamma_table)
+{
+	int i, sr1a;
+	int active_device_amount = 0;
+	int device_status = viafb_DeviceStatus;
+
+	for (i = 0; i < sizeof(viafb_DeviceStatus) * 8; i++) {
+		if (device_status & 1)
+			active_device_amount++;
+		device_status >>= 1;
+	}
+
+	/* 8 bpp mode can't adjust gamma */
+	if (bpp == 8)
+		return ;
+
+	/* Enable Gamma */
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+		viafb_write_reg_mask(SR16, VIASR, 0x80, BIT7);
+		break;
+
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+	case UNICHROME_CX700:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+		viafb_write_reg_mask(CR33, VIACR, 0x80, BIT7);
+		break;
+	}
+	sr1a = (unsigned int)viafb_read_reg(VIASR, SR1A);
+	viafb_write_reg_mask(SR1A, VIASR, 0x0, BIT0);
+
+	/* Fill IGA1 Gamma Table */
+	outb(0, LUT_INDEX_WRITE);
+	for (i = 0; i < 256; i++) {
+		outb(gamma_table[i] >> 16, LUT_DATA);
+		outb(gamma_table[i] >> 8 & 0xFF, LUT_DATA);
+		outb(gamma_table[i] & 0xFF, LUT_DATA);
+	}
+
+	/* If adjust Gamma value in SAMM, fill IGA1,
+	   IGA2 Gamma table simultaneous. */
+	/* Switch to IGA2 Gamma Table */
+	if ((active_device_amount > 1) &&
+		!((viaparinfo->chip_info->gfx_chip_name ==
+		UNICHROME_CLE266) &&
+		(viaparinfo->chip_info->gfx_chip_revision < 15))) {
+		viafb_write_reg_mask(SR1A, VIASR, 0x01, BIT0);
+		viafb_write_reg_mask(CR6A, VIACR, 0x02, BIT1);
+
+		/* Fill IGA2 Gamma Table */
+		outb(0, LUT_INDEX_WRITE);
+		for (i = 0; i < 256; i++) {
+			outb(gamma_table[i] >> 16, LUT_DATA);
+			outb(gamma_table[i] >> 8 & 0xFF, LUT_DATA);
+			outb(gamma_table[i] & 0xFF, LUT_DATA);
+		}
+	}
+	viafb_write_reg(SR1A, VIASR, sr1a);
+}
+
+void viafb_get_gamma_table(unsigned int *gamma_table)
+{
+	unsigned char color_r, color_g, color_b;
+	unsigned char sr1a = 0;
+	int i;
+
+	/* Enable Gamma */
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+		viafb_write_reg_mask(SR16, VIASR, 0x80, BIT7);
+		break;
+
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+	case UNICHROME_CX700:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+		viafb_write_reg_mask(CR33, VIACR, 0x80, BIT7);
+		break;
+	}
+	sr1a = viafb_read_reg(VIASR, SR1A);
+	viafb_write_reg_mask(SR1A, VIASR, 0x0, BIT0);
+
+	/* Reading gamma table to get color value */
+	outb(0, LUT_INDEX_READ);
+	for (i = 0; i < 256; i++) {
+		color_r = inb(LUT_DATA);
+		color_g = inb(LUT_DATA);
+		color_b = inb(LUT_DATA);
+		gamma_table[i] =
+		    ((((u32) color_r) << 16) |
+		     (((u16) color_g) << 8)) | color_b;
+	}
+	viafb_write_reg(SR1A, VIASR, sr1a);
+}
+
+void viafb_get_gamma_support_state(int bpp, unsigned int *support_state)
+{
+	if (bpp == 8)
+		*support_state = None_Device;
+	else
+		*support_state = CRT_Device | DVI_Device | LCD_Device;
+}
diff --git a/drivers/video/fbdev/via/via_utility.h b/drivers/video/fbdev/via/via_utility.h
new file mode 100644
index 0000000000..c0c491c658
--- /dev/null
+++ b/drivers/video/fbdev/via/via_utility.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+#ifndef __VIAUTILITY_H__
+#define __VIAUTILITY_H__
+
+/* These functions are used to get information about device's state */
+void viafb_get_device_support_state(u32 *support_state);
+void viafb_get_device_connect_state(u32 *connect_state);
+bool viafb_lcd_get_support_expand_state(u32 xres, u32 yres);
+
+/* These function are used to access gamma table */
+void viafb_set_gamma_table(int bpp, unsigned int *gamma_table);
+void viafb_get_gamma_table(unsigned int *gamma_table);
+void viafb_get_gamma_support_state(int bpp, unsigned int *support_state);
+
+#endif /* __VIAUTILITY_H__ */
diff --git a/drivers/video/fbdev/via/viafbdev.c b/drivers/video/fbdev/via/viafbdev.c
new file mode 100644
index 0000000000..190fddee62
--- /dev/null
+++ b/drivers/video/fbdev/via/viafbdev.c
@@ -0,0 +1,2146 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include <linux/compiler.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+
+#define _MASTER_FILE
+#include "global.h"
+
+static char *viafb_name = "Via";
+static u32 pseudo_pal[17];
+
+/* video mode */
+static char *viafb_mode;
+static char *viafb_mode1;
+static int viafb_bpp = 32;
+static int viafb_bpp1 = 32;
+
+static unsigned int viafb_second_offset;
+static int viafb_second_size;
+
+static int viafb_accel = 1;
+
+/* Added for specifying active devices.*/
+static char *viafb_active_dev;
+
+/*Added for specify lcd output port*/
+static char *viafb_lcd_port = "";
+static char *viafb_dvi_port = "";
+
+static void retrieve_device_setting(struct viafb_ioctl_setting
+	*setting_info);
+static int viafb_pan_display(struct fb_var_screeninfo *var,
+	struct fb_info *info);
+
+static struct fb_ops viafb_ops;
+
+/* supported output devices on each IGP
+ * only CX700, VX800, VX855, VX900 were documented
+ * VIA_CRT should be everywhere
+ * VIA_6C can be onle pre-CX700 (probably only on CLE266) as 6C is used for PLL
+ * source selection on CX700 and later
+ * K400 seems to support VIA_96, VIA_DVP1, VIA_LVDS{1,2} as in viamode.c
+ */
+static const u32 supported_odev_map[] = {
+	[UNICHROME_CLE266]	= VIA_CRT | VIA_LDVP0 | VIA_LDVP1,
+	[UNICHROME_K400]	= VIA_CRT | VIA_DVP0 | VIA_DVP1 | VIA_LVDS1
+				| VIA_LVDS2,
+	[UNICHROME_K800]	= VIA_CRT | VIA_DVP0 | VIA_DVP1 | VIA_LVDS1
+				| VIA_LVDS2,
+	[UNICHROME_PM800]	= VIA_CRT | VIA_DVP0 | VIA_DVP1 | VIA_LVDS1
+				| VIA_LVDS2,
+	[UNICHROME_CN700]	= VIA_CRT | VIA_DVP0 | VIA_DVP1 | VIA_LVDS1
+				| VIA_LVDS2,
+	[UNICHROME_CX700]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_CN750]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_K8M890]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_P4M890]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_P4M900]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_VX800]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_VX855]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+	[UNICHROME_VX900]	= VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+};
+
+static void viafb_fill_var_color_info(struct fb_var_screeninfo *var, u8 depth)
+{
+	var->grayscale = 0;
+	var->red.msb_right = 0;
+	var->green.msb_right = 0;
+	var->blue.msb_right = 0;
+	var->transp.offset = 0;
+	var->transp.length = 0;
+	var->transp.msb_right = 0;
+	var->nonstd = 0;
+	switch (depth) {
+	case 8:
+		var->bits_per_pixel = 8;
+		var->red.offset = 0;
+		var->green.offset = 0;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		break;
+	case 15:
+		var->bits_per_pixel = 16;
+		var->red.offset = 10;
+		var->green.offset = 5;
+		var->blue.offset = 0;
+		var->red.length = 5;
+		var->green.length = 5;
+		var->blue.length = 5;
+		break;
+	case 16:
+		var->bits_per_pixel = 16;
+		var->red.offset = 11;
+		var->green.offset = 5;
+		var->blue.offset = 0;
+		var->red.length = 5;
+		var->green.length = 6;
+		var->blue.length = 5;
+		break;
+	case 24:
+		var->bits_per_pixel = 32;
+		var->red.offset = 16;
+		var->green.offset = 8;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		break;
+	case 30:
+		var->bits_per_pixel = 32;
+		var->red.offset = 20;
+		var->green.offset = 10;
+		var->blue.offset = 0;
+		var->red.length = 10;
+		var->green.length = 10;
+		var->blue.length = 10;
+		break;
+	}
+}
+
+static void viafb_update_fix(struct fb_info *info)
+{
+	u32 bpp = info->var.bits_per_pixel;
+
+	info->fix.visual =
+		bpp == 8 ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+	info->fix.line_length = ALIGN(info->var.xres_virtual * bpp / 8,
+		VIA_PITCH_SIZE);
+}
+
+static void viafb_setup_fixinfo(struct fb_fix_screeninfo *fix,
+	struct viafb_par *viaparinfo)
+{
+	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+	strcpy(fix->id, viafb_name);
+
+	fix->smem_start = viaparinfo->fbmem;
+	fix->smem_len = viaparinfo->fbmem_free;
+
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->type_aux = 0;
+	fix->visual = FB_VISUAL_TRUECOLOR;
+
+	fix->xpanstep = fix->ywrapstep = 0;
+	fix->ypanstep = 1;
+
+	/* Just tell the accel name */
+	viafbinfo->fix.accel = FB_ACCEL_VIA_UNICHROME;
+}
+static int viafb_open(struct fb_info *info, int user)
+{
+	DEBUG_MSG(KERN_INFO "viafb_open!\n");
+	return 0;
+}
+
+static int viafb_release(struct fb_info *info, int user)
+{
+	DEBUG_MSG(KERN_INFO "viafb_release!\n");
+	return 0;
+}
+
+static inline int get_var_refresh(struct fb_var_screeninfo *var)
+{
+	u32 htotal, vtotal;
+
+	htotal = var->left_margin + var->xres + var->right_margin
+		+ var->hsync_len;
+	vtotal = var->upper_margin + var->yres + var->lower_margin
+		+ var->vsync_len;
+	return PICOS2KHZ(var->pixclock) * 1000 / (htotal * vtotal);
+}
+
+static int viafb_check_var(struct fb_var_screeninfo *var,
+	struct fb_info *info)
+{
+	int depth, refresh;
+	struct viafb_par *ppar = info->par;
+	u32 line;
+
+	DEBUG_MSG(KERN_INFO "viafb_check_var!\n");
+	/* Sanity check */
+	/* HW neither support interlacte nor double-scaned mode */
+	if (var->vmode & FB_VMODE_INTERLACED || var->vmode & FB_VMODE_DOUBLE)
+		return -EINVAL;
+
+	/* the refresh rate is not important here, as we only want to know
+	 * whether the resolution exists
+	 */
+	if (!viafb_get_best_mode(var->xres, var->yres, 60)) {
+		DEBUG_MSG(KERN_INFO
+			  "viafb: Mode %dx%dx%d not supported!!\n",
+			  var->xres, var->yres, var->bits_per_pixel);
+		return -EINVAL;
+	}
+
+	depth = fb_get_color_depth(var, &info->fix);
+	if (!depth)
+		depth = var->bits_per_pixel;
+
+	if (depth < 0 || depth > 32)
+		return -EINVAL;
+	else if (!depth)
+		depth = 24;
+	else if (depth == 15 && viafb_dual_fb && ppar->iga_path == IGA1)
+		depth = 15;
+	else if (depth == 30)
+		depth = 30;
+	else if (depth <= 8)
+		depth = 8;
+	else if (depth <= 16)
+		depth = 16;
+	else
+		depth = 24;
+
+	viafb_fill_var_color_info(var, depth);
+	if (var->xres_virtual < var->xres)
+		var->xres_virtual = var->xres;
+
+	line = ALIGN(var->xres_virtual * var->bits_per_pixel / 8,
+		VIA_PITCH_SIZE);
+	if (line > VIA_PITCH_MAX || line * var->yres_virtual > ppar->memsize)
+		return -EINVAL;
+
+	/* Based on var passed in to calculate the refresh,
+	 * because our driver use some modes special.
+	 */
+	refresh = viafb_get_refresh(var->xres, var->yres,
+		get_var_refresh(var));
+
+	/* Adjust var according to our driver's own table */
+	viafb_fill_var_timing_info(var,
+		viafb_get_best_mode(var->xres, var->yres, refresh));
+	if (var->accel_flags & FB_ACCELF_TEXT &&
+		!ppar->shared->vdev->engine_mmio)
+		var->accel_flags = 0;
+
+	return 0;
+}
+
+static int viafb_set_par(struct fb_info *info)
+{
+	struct viafb_par *viapar = info->par;
+	int refresh;
+	DEBUG_MSG(KERN_INFO "viafb_set_par!\n");
+
+	viafb_update_fix(info);
+	viapar->depth = fb_get_color_depth(&info->var, &info->fix);
+	viafb_update_device_setting(viafbinfo->var.xres, viafbinfo->var.yres,
+		viafbinfo->var.bits_per_pixel, 0);
+
+	if (viafb_dual_fb) {
+		viafb_update_device_setting(viafbinfo1->var.xres,
+			viafbinfo1->var.yres, viafbinfo1->var.bits_per_pixel,
+			1);
+	} else if (viafb_SAMM_ON == 1) {
+		DEBUG_MSG(KERN_INFO
+		"viafb_second_xres = %d, viafb_second_yres = %d, bpp = %d\n",
+			  viafb_second_xres, viafb_second_yres, viafb_bpp1);
+
+		viafb_update_device_setting(viafb_second_xres,
+			viafb_second_yres, viafb_bpp1, 1);
+	}
+
+	refresh = get_var_refresh(&info->var);
+	if (viafb_dual_fb && viapar->iga_path == IGA2) {
+		viafb_bpp1 = info->var.bits_per_pixel;
+		viafb_refresh1 = refresh;
+	} else {
+		viafb_bpp = info->var.bits_per_pixel;
+		viafb_refresh = refresh;
+	}
+
+	if (info->var.accel_flags & FB_ACCELF_TEXT)
+		info->flags &= ~FBINFO_HWACCEL_DISABLED;
+	else
+		info->flags |= FBINFO_HWACCEL_DISABLED;
+	viafb_setmode();
+	viafb_pan_display(&info->var, info);
+
+	return 0;
+}
+
+/* Set one color register */
+static int viafb_setcolreg(unsigned regno, unsigned red, unsigned green,
+unsigned blue, unsigned transp, struct fb_info *info)
+{
+	struct viafb_par *viapar = info->par;
+	u32 r, g, b;
+
+	if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR) {
+		if (regno > 255)
+			return -EINVAL;
+
+		if (!viafb_dual_fb || viapar->iga_path == IGA1)
+			viafb_set_primary_color_register(regno, red >> 8,
+				green >> 8, blue >> 8);
+
+		if (!viafb_dual_fb || viapar->iga_path == IGA2)
+			viafb_set_secondary_color_register(regno, red >> 8,
+				green >> 8, blue >> 8);
+	} else {
+		if (regno > 15)
+			return -EINVAL;
+
+		r = (red >> (16 - info->var.red.length))
+			<< info->var.red.offset;
+		b = (blue >> (16 - info->var.blue.length))
+			<< info->var.blue.offset;
+		g = (green >> (16 - info->var.green.length))
+			<< info->var.green.offset;
+		((u32 *) info->pseudo_palette)[regno] = r | g | b;
+	}
+
+	return 0;
+}
+
+static int viafb_pan_display(struct fb_var_screeninfo *var,
+	struct fb_info *info)
+{
+	struct viafb_par *viapar = info->par;
+	u32 vram_addr = viapar->vram_addr
+		+ var->yoffset * info->fix.line_length
+		+ var->xoffset * info->var.bits_per_pixel / 8;
+
+	DEBUG_MSG(KERN_DEBUG "viafb_pan_display, address = %d\n", vram_addr);
+	if (!viafb_dual_fb) {
+		via_set_primary_address(vram_addr);
+		via_set_secondary_address(vram_addr);
+	} else if (viapar->iga_path == IGA1)
+		via_set_primary_address(vram_addr);
+	else
+		via_set_secondary_address(vram_addr);
+
+	return 0;
+}
+
+static int viafb_blank(int blank_mode, struct fb_info *info)
+{
+	DEBUG_MSG(KERN_INFO "viafb_blank!\n");
+	/* clear DPMS setting */
+
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		/* Screen: On, HSync: On, VSync: On */
+		/* control CRT monitor power management */
+		via_set_state(VIA_CRT, VIA_STATE_ON);
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:
+		/* Screen: Off, HSync: Off, VSync: On */
+		/* control CRT monitor power management */
+		via_set_state(VIA_CRT, VIA_STATE_STANDBY);
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:
+		/* Screen: Off, HSync: On, VSync: Off */
+		/* control CRT monitor power management */
+		via_set_state(VIA_CRT, VIA_STATE_SUSPEND);
+		break;
+	case FB_BLANK_POWERDOWN:
+		/* Screen: Off, HSync: Off, VSync: Off */
+		/* control CRT monitor power management */
+		via_set_state(VIA_CRT, VIA_STATE_OFF);
+		break;
+	}
+
+	return 0;
+}
+
+static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
+{
+	union {
+		struct viafb_ioctl_mode viamode;
+		struct viafb_ioctl_samm viasamm;
+		struct viafb_driver_version driver_version;
+		struct fb_var_screeninfo sec_var;
+		struct _panel_size_pos_info panel_pos_size_para;
+		struct viafb_ioctl_setting viafb_setting;
+		struct device_t active_dev;
+	} u;
+	u32 state_info = 0;
+	u32 *viafb_gamma_table;
+	char driver_name[] = "viafb";
+
+	u32 __user *argp = (u32 __user *) arg;
+	u32 gpu32;
+
+	DEBUG_MSG(KERN_INFO "viafb_ioctl: 0x%X !!\n", cmd);
+	printk(KERN_WARNING "viafb_ioctl: Please avoid this interface as it is unstable and might change or vanish at any time!\n");
+	memset(&u, 0, sizeof(u));
+
+	switch (cmd) {
+	case VIAFB_GET_CHIP_INFO:
+		if (copy_to_user(argp, viaparinfo->chip_info,
+				sizeof(struct chip_information)))
+			return -EFAULT;
+		break;
+	case VIAFB_GET_INFO_SIZE:
+		return put_user((u32)sizeof(struct viafb_ioctl_info), argp);
+	case VIAFB_GET_INFO:
+		return viafb_ioctl_get_viafb_info(arg);
+	case VIAFB_HOTPLUG:
+		return put_user(viafb_ioctl_hotplug(info->var.xres,
+					      info->var.yres,
+					      info->var.bits_per_pixel), argp);
+	case VIAFB_SET_HOTPLUG_FLAG:
+		if (copy_from_user(&gpu32, argp, sizeof(gpu32)))
+			return -EFAULT;
+		viafb_hotplug = (gpu32) ? 1 : 0;
+		break;
+	case VIAFB_GET_RESOLUTION:
+		u.viamode.xres = (u32) viafb_hotplug_Xres;
+		u.viamode.yres = (u32) viafb_hotplug_Yres;
+		u.viamode.refresh = (u32) viafb_hotplug_refresh;
+		u.viamode.bpp = (u32) viafb_hotplug_bpp;
+		if (viafb_SAMM_ON == 1) {
+			u.viamode.xres_sec = viafb_second_xres;
+			u.viamode.yres_sec = viafb_second_yres;
+			u.viamode.virtual_xres_sec = viafb_dual_fb ? viafbinfo1->var.xres_virtual : viafbinfo->var.xres_virtual;
+			u.viamode.virtual_yres_sec = viafb_dual_fb ? viafbinfo1->var.yres_virtual : viafbinfo->var.yres_virtual;
+			u.viamode.refresh_sec = viafb_refresh1;
+			u.viamode.bpp_sec = viafb_bpp1;
+		} else {
+			u.viamode.xres_sec = 0;
+			u.viamode.yres_sec = 0;
+			u.viamode.virtual_xres_sec = 0;
+			u.viamode.virtual_yres_sec = 0;
+			u.viamode.refresh_sec = 0;
+			u.viamode.bpp_sec = 0;
+		}
+		if (copy_to_user(argp, &u.viamode, sizeof(u.viamode)))
+			return -EFAULT;
+		break;
+	case VIAFB_GET_SAMM_INFO:
+		u.viasamm.samm_status = viafb_SAMM_ON;
+
+		if (viafb_SAMM_ON == 1) {
+			if (viafb_dual_fb) {
+				u.viasamm.size_prim = viaparinfo->fbmem_free;
+				u.viasamm.size_sec = viaparinfo1->fbmem_free;
+			} else {
+				if (viafb_second_size) {
+					u.viasamm.size_prim =
+					    viaparinfo->fbmem_free -
+					    viafb_second_size * 1024 * 1024;
+					u.viasamm.size_sec =
+					    viafb_second_size * 1024 * 1024;
+				} else {
+					u.viasamm.size_prim =
+					    viaparinfo->fbmem_free >> 1;
+					u.viasamm.size_sec =
+					    (viaparinfo->fbmem_free >> 1);
+				}
+			}
+			u.viasamm.mem_base = viaparinfo->fbmem;
+			u.viasamm.offset_sec = viafb_second_offset;
+		} else {
+			u.viasamm.size_prim =
+			    viaparinfo->memsize - viaparinfo->fbmem_used;
+			u.viasamm.size_sec = 0;
+			u.viasamm.mem_base = viaparinfo->fbmem;
+			u.viasamm.offset_sec = 0;
+		}
+
+		if (copy_to_user(argp, &u.viasamm, sizeof(u.viasamm)))
+			return -EFAULT;
+
+		break;
+	case VIAFB_TURN_ON_OUTPUT_DEVICE:
+		if (copy_from_user(&gpu32, argp, sizeof(gpu32)))
+			return -EFAULT;
+		if (gpu32 & CRT_Device)
+			via_set_state(VIA_CRT, VIA_STATE_ON);
+		if (gpu32 & DVI_Device)
+			viafb_dvi_enable();
+		if (gpu32 & LCD_Device)
+			viafb_lcd_enable();
+		break;
+	case VIAFB_TURN_OFF_OUTPUT_DEVICE:
+		if (copy_from_user(&gpu32, argp, sizeof(gpu32)))
+			return -EFAULT;
+		if (gpu32 & CRT_Device)
+			via_set_state(VIA_CRT, VIA_STATE_OFF);
+		if (gpu32 & DVI_Device)
+			viafb_dvi_disable();
+		if (gpu32 & LCD_Device)
+			viafb_lcd_disable();
+		break;
+	case VIAFB_GET_DEVICE:
+		u.active_dev.crt = viafb_CRT_ON;
+		u.active_dev.dvi = viafb_DVI_ON;
+		u.active_dev.lcd = viafb_LCD_ON;
+		u.active_dev.samm = viafb_SAMM_ON;
+		u.active_dev.primary_dev = viafb_primary_dev;
+
+		u.active_dev.lcd_dsp_cent = viafb_lcd_dsp_method;
+		u.active_dev.lcd_panel_id = viafb_lcd_panel_id;
+		u.active_dev.lcd_mode = viafb_lcd_mode;
+
+		u.active_dev.xres = viafb_hotplug_Xres;
+		u.active_dev.yres = viafb_hotplug_Yres;
+
+		u.active_dev.xres1 = viafb_second_xres;
+		u.active_dev.yres1 = viafb_second_yres;
+
+		u.active_dev.bpp = viafb_bpp;
+		u.active_dev.bpp1 = viafb_bpp1;
+		u.active_dev.refresh = viafb_refresh;
+		u.active_dev.refresh1 = viafb_refresh1;
+
+		u.active_dev.epia_dvi = viafb_platform_epia_dvi;
+		u.active_dev.lcd_dual_edge = viafb_device_lcd_dualedge;
+		u.active_dev.bus_width = viafb_bus_width;
+
+		if (copy_to_user(argp, &u.active_dev, sizeof(u.active_dev)))
+			return -EFAULT;
+		break;
+
+	case VIAFB_GET_DRIVER_VERSION:
+		u.driver_version.iMajorNum = VERSION_MAJOR;
+		u.driver_version.iKernelNum = VERSION_KERNEL;
+		u.driver_version.iOSNum = VERSION_OS;
+		u.driver_version.iMinorNum = VERSION_MINOR;
+
+		if (copy_to_user(argp, &u.driver_version,
+			sizeof(u.driver_version)))
+			return -EFAULT;
+
+		break;
+
+	case VIAFB_GET_DEVICE_INFO:
+
+		retrieve_device_setting(&u.viafb_setting);
+
+		if (copy_to_user(argp, &u.viafb_setting,
+				 sizeof(u.viafb_setting)))
+			return -EFAULT;
+
+		break;
+
+	case VIAFB_GET_DEVICE_SUPPORT:
+		viafb_get_device_support_state(&state_info);
+		if (put_user(state_info, argp))
+			return -EFAULT;
+		break;
+
+	case VIAFB_GET_DEVICE_CONNECT:
+		viafb_get_device_connect_state(&state_info);
+		if (put_user(state_info, argp))
+			return -EFAULT;
+		break;
+
+	case VIAFB_GET_PANEL_SUPPORT_EXPAND:
+		state_info =
+		    viafb_lcd_get_support_expand_state(info->var.xres,
+						 info->var.yres);
+		if (put_user(state_info, argp))
+			return -EFAULT;
+		break;
+
+	case VIAFB_GET_DRIVER_NAME:
+		if (copy_to_user(argp, driver_name, sizeof(driver_name)))
+			return -EFAULT;
+		break;
+
+	case VIAFB_SET_GAMMA_LUT:
+		viafb_gamma_table = memdup_user(argp, 256 * sizeof(u32));
+		if (IS_ERR(viafb_gamma_table))
+			return PTR_ERR(viafb_gamma_table);
+		viafb_set_gamma_table(viafb_bpp, viafb_gamma_table);
+		kfree(viafb_gamma_table);
+		break;
+
+	case VIAFB_GET_GAMMA_LUT:
+		viafb_gamma_table = kmalloc_array(256, sizeof(u32),
+						  GFP_KERNEL);
+		if (!viafb_gamma_table)
+			return -ENOMEM;
+		viafb_get_gamma_table(viafb_gamma_table);
+		if (copy_to_user(argp, viafb_gamma_table,
+			256 * sizeof(u32))) {
+			kfree(viafb_gamma_table);
+			return -EFAULT;
+		}
+		kfree(viafb_gamma_table);
+		break;
+
+	case VIAFB_GET_GAMMA_SUPPORT_STATE:
+		viafb_get_gamma_support_state(viafb_bpp, &state_info);
+		if (put_user(state_info, argp))
+			return -EFAULT;
+		break;
+	case VIAFB_SYNC_SURFACE:
+		DEBUG_MSG(KERN_INFO "lobo VIAFB_SYNC_SURFACE\n");
+		break;
+	case VIAFB_GET_DRIVER_CAPS:
+		break;
+
+	case VIAFB_GET_PANEL_MAX_SIZE:
+		if (copy_from_user(&u.panel_pos_size_para, argp,
+				   sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		u.panel_pos_size_para.x = u.panel_pos_size_para.y = 0;
+		if (copy_to_user(argp, &u.panel_pos_size_para,
+		     sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		break;
+	case VIAFB_GET_PANEL_MAX_POSITION:
+		if (copy_from_user(&u.panel_pos_size_para, argp,
+				   sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		u.panel_pos_size_para.x = u.panel_pos_size_para.y = 0;
+		if (copy_to_user(argp, &u.panel_pos_size_para,
+				 sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		break;
+
+	case VIAFB_GET_PANEL_POSITION:
+		if (copy_from_user(&u.panel_pos_size_para, argp,
+				   sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		u.panel_pos_size_para.x = u.panel_pos_size_para.y = 0;
+		if (copy_to_user(argp, &u.panel_pos_size_para,
+				 sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		break;
+	case VIAFB_GET_PANEL_SIZE:
+		if (copy_from_user(&u.panel_pos_size_para, argp,
+				   sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		u.panel_pos_size_para.x = u.panel_pos_size_para.y = 0;
+		if (copy_to_user(argp, &u.panel_pos_size_para,
+				 sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		break;
+
+	case VIAFB_SET_PANEL_POSITION:
+		if (copy_from_user(&u.panel_pos_size_para, argp,
+				   sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		break;
+	case VIAFB_SET_PANEL_SIZE:
+		if (copy_from_user(&u.panel_pos_size_para, argp,
+				   sizeof(u.panel_pos_size_para)))
+			return -EFAULT;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void viafb_fillrect(struct fb_info *info,
+	const struct fb_fillrect *rect)
+{
+	struct viafb_par *viapar = info->par;
+	struct viafb_shared *shared = viapar->shared;
+	u32 fg_color;
+	u8 rop;
+
+	if (info->flags & FBINFO_HWACCEL_DISABLED || !shared->hw_bitblt) {
+		cfb_fillrect(info, rect);
+		return;
+	}
+
+	if (!rect->width || !rect->height)
+		return;
+
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR)
+		fg_color = ((u32 *)info->pseudo_palette)[rect->color];
+	else
+		fg_color = rect->color;
+
+	if (rect->rop == ROP_XOR)
+		rop = 0x5A;
+	else
+		rop = 0xF0;
+
+	DEBUG_MSG(KERN_DEBUG "viafb 2D engine: fillrect\n");
+	if (shared->hw_bitblt(shared->vdev->engine_mmio, VIA_BITBLT_FILL,
+		rect->width, rect->height, info->var.bits_per_pixel,
+		viapar->vram_addr, info->fix.line_length, rect->dx, rect->dy,
+		NULL, 0, 0, 0, 0, fg_color, 0, rop))
+		cfb_fillrect(info, rect);
+}
+
+static void viafb_copyarea(struct fb_info *info,
+	const struct fb_copyarea *area)
+{
+	struct viafb_par *viapar = info->par;
+	struct viafb_shared *shared = viapar->shared;
+
+	if (info->flags & FBINFO_HWACCEL_DISABLED || !shared->hw_bitblt) {
+		cfb_copyarea(info, area);
+		return;
+	}
+
+	if (!area->width || !area->height)
+		return;
+
+	DEBUG_MSG(KERN_DEBUG "viafb 2D engine: copyarea\n");
+	if (shared->hw_bitblt(shared->vdev->engine_mmio, VIA_BITBLT_COLOR,
+		area->width, area->height, info->var.bits_per_pixel,
+		viapar->vram_addr, info->fix.line_length, area->dx, area->dy,
+		NULL, viapar->vram_addr, info->fix.line_length,
+		area->sx, area->sy, 0, 0, 0))
+		cfb_copyarea(info, area);
+}
+
+static void viafb_imageblit(struct fb_info *info,
+	const struct fb_image *image)
+{
+	struct viafb_par *viapar = info->par;
+	struct viafb_shared *shared = viapar->shared;
+	u32 fg_color = 0, bg_color = 0;
+	u8 op;
+
+	if (info->flags & FBINFO_HWACCEL_DISABLED || !shared->hw_bitblt ||
+		(image->depth != 1 && image->depth != viapar->depth)) {
+		cfb_imageblit(info, image);
+		return;
+	}
+
+	if (image->depth == 1) {
+		op = VIA_BITBLT_MONO;
+		if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+			fg_color =
+				((u32 *)info->pseudo_palette)[image->fg_color];
+			bg_color =
+				((u32 *)info->pseudo_palette)[image->bg_color];
+		} else {
+			fg_color = image->fg_color;
+			bg_color = image->bg_color;
+		}
+	} else
+		op = VIA_BITBLT_COLOR;
+
+	DEBUG_MSG(KERN_DEBUG "viafb 2D engine: imageblit\n");
+	if (shared->hw_bitblt(shared->vdev->engine_mmio, op,
+		image->width, image->height, info->var.bits_per_pixel,
+		viapar->vram_addr, info->fix.line_length, image->dx, image->dy,
+		(u32 *)image->data, 0, 0, 0, 0, fg_color, bg_color, 0))
+		cfb_imageblit(info, image);
+}
+
+static int viafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+	struct viafb_par *viapar = info->par;
+	void __iomem *engine = viapar->shared->vdev->engine_mmio;
+	u32 temp, xx, yy, bg_color = 0, fg_color = 0,
+		chip_name = viapar->shared->chip_info.gfx_chip_name;
+	int i, j = 0, cur_size = 64;
+
+	if (info->flags & FBINFO_HWACCEL_DISABLED || info != viafbinfo)
+		return -ENODEV;
+
+	/* LCD ouput does not support hw cursors (at least on VN896) */
+	if ((chip_name == UNICHROME_CLE266 && viapar->iga_path == IGA2) ||
+		viafb_LCD_ON)
+		return -ENODEV;
+
+	viafb_show_hw_cursor(info, HW_Cursor_OFF);
+
+	if (cursor->set & FB_CUR_SETHOT) {
+		temp = (cursor->hot.x << 16) + cursor->hot.y;
+		writel(temp, engine + VIA_REG_CURSOR_ORG);
+	}
+
+	if (cursor->set & FB_CUR_SETPOS) {
+		yy = cursor->image.dy - info->var.yoffset;
+		xx = cursor->image.dx - info->var.xoffset;
+		temp = yy & 0xFFFF;
+		temp |= (xx << 16);
+		writel(temp, engine + VIA_REG_CURSOR_POS);
+	}
+
+	if (cursor->image.width <= 32 && cursor->image.height <= 32)
+		cur_size = 32;
+	else if (cursor->image.width <= 64 && cursor->image.height <= 64)
+		cur_size = 64;
+	else {
+		printk(KERN_WARNING "viafb_cursor: The cursor is too large "
+			"%dx%d", cursor->image.width, cursor->image.height);
+		return -ENXIO;
+	}
+
+	if (cursor->set & FB_CUR_SETSIZE) {
+		temp = readl(engine + VIA_REG_CURSOR_MODE);
+		if (cur_size == 32)
+			temp |= 0x2;
+		else
+			temp &= ~0x2;
+
+		writel(temp, engine + VIA_REG_CURSOR_MODE);
+	}
+
+	if (cursor->set & FB_CUR_SETCMAP) {
+		fg_color = cursor->image.fg_color;
+		bg_color = cursor->image.bg_color;
+		if (chip_name == UNICHROME_CX700 ||
+			chip_name == UNICHROME_VX800 ||
+			chip_name == UNICHROME_VX855 ||
+			chip_name == UNICHROME_VX900) {
+			fg_color =
+				((info->cmap.red[fg_color] & 0xFFC0) << 14) |
+				((info->cmap.green[fg_color] & 0xFFC0) << 4) |
+				((info->cmap.blue[fg_color] & 0xFFC0) >> 6);
+			bg_color =
+				((info->cmap.red[bg_color] & 0xFFC0) << 14) |
+				((info->cmap.green[bg_color] & 0xFFC0) << 4) |
+				((info->cmap.blue[bg_color] & 0xFFC0) >> 6);
+		} else {
+			fg_color =
+				((info->cmap.red[fg_color] & 0xFF00) << 8) |
+				(info->cmap.green[fg_color] & 0xFF00) |
+				((info->cmap.blue[fg_color] & 0xFF00) >> 8);
+			bg_color =
+				((info->cmap.red[bg_color] & 0xFF00) << 8) |
+				(info->cmap.green[bg_color] & 0xFF00) |
+				((info->cmap.blue[bg_color] & 0xFF00) >> 8);
+		}
+
+		writel(bg_color, engine + VIA_REG_CURSOR_BG);
+		writel(fg_color, engine + VIA_REG_CURSOR_FG);
+	}
+
+	if (cursor->set & FB_CUR_SETSHAPE) {
+		struct {
+			u8 data[CURSOR_SIZE];
+			u32 bak[CURSOR_SIZE / 4];
+		} *cr_data = kzalloc(sizeof(*cr_data), GFP_ATOMIC);
+		int size = ((cursor->image.width + 7) >> 3) *
+			cursor->image.height;
+
+		if (!cr_data)
+			return -ENOMEM;
+
+		if (cur_size == 32) {
+			for (i = 0; i < (CURSOR_SIZE / 4); i++) {
+				cr_data->bak[i] = 0x0;
+				cr_data->bak[i + 1] = 0xFFFFFFFF;
+				i += 1;
+			}
+		} else {
+			for (i = 0; i < (CURSOR_SIZE / 4); i++) {
+				cr_data->bak[i] = 0x0;
+				cr_data->bak[i + 1] = 0x0;
+				cr_data->bak[i + 2] = 0xFFFFFFFF;
+				cr_data->bak[i + 3] = 0xFFFFFFFF;
+				i += 3;
+			}
+		}
+
+		switch (cursor->rop) {
+		case ROP_XOR:
+			for (i = 0; i < size; i++)
+				cr_data->data[i] = cursor->mask[i];
+			break;
+		case ROP_COPY:
+
+			for (i = 0; i < size; i++)
+				cr_data->data[i] = cursor->mask[i];
+			break;
+		default:
+			break;
+		}
+
+		if (cur_size == 32) {
+			for (i = 0; i < size; i++) {
+				cr_data->bak[j] = (u32) cr_data->data[i];
+				cr_data->bak[j + 1] = ~cr_data->bak[j];
+				j += 2;
+			}
+		} else {
+			for (i = 0; i < size; i++) {
+				cr_data->bak[j] = (u32) cr_data->data[i];
+				cr_data->bak[j + 1] = 0x0;
+				cr_data->bak[j + 2] = ~cr_data->bak[j];
+				cr_data->bak[j + 3] = ~cr_data->bak[j + 1];
+				j += 4;
+			}
+		}
+
+		memcpy_toio(viafbinfo->screen_base + viapar->shared->
+			cursor_vram_addr, cr_data->bak, CURSOR_SIZE);
+		kfree(cr_data);
+	}
+
+	if (cursor->enable)
+		viafb_show_hw_cursor(info, HW_Cursor_ON);
+
+	return 0;
+}
+
+static int viafb_sync(struct fb_info *info)
+{
+	if (!(info->flags & FBINFO_HWACCEL_DISABLED))
+		viafb_wait_engine_idle(info);
+	return 0;
+}
+
+static int get_primary_device(void)
+{
+	int primary_device = 0;
+	/* Rule: device on iga1 path are the primary device. */
+	if (viafb_SAMM_ON) {
+		if (viafb_CRT_ON) {
+			if (viaparinfo->shared->iga1_devices & VIA_CRT) {
+				DEBUG_MSG(KERN_INFO "CRT IGA Path:%d\n", IGA1);
+				primary_device = CRT_Device;
+			}
+		}
+		if (viafb_DVI_ON) {
+			if (viaparinfo->tmds_setting_info->iga_path == IGA1) {
+				DEBUG_MSG(KERN_INFO "DVI IGA Path:%d\n",
+					viaparinfo->
+					tmds_setting_info->iga_path);
+				primary_device = DVI_Device;
+			}
+		}
+		if (viafb_LCD_ON) {
+			if (viaparinfo->lvds_setting_info->iga_path == IGA1) {
+				DEBUG_MSG(KERN_INFO "LCD IGA Path:%d\n",
+					viaparinfo->
+					lvds_setting_info->iga_path);
+				primary_device = LCD_Device;
+			}
+		}
+		if (viafb_LCD2_ON) {
+			if (viaparinfo->lvds_setting_info2->iga_path == IGA1) {
+				DEBUG_MSG(KERN_INFO "LCD2 IGA Path:%d\n",
+					viaparinfo->
+					lvds_setting_info2->iga_path);
+				primary_device = LCD2_Device;
+			}
+		}
+	}
+	return primary_device;
+}
+
+static void retrieve_device_setting(struct viafb_ioctl_setting
+	*setting_info)
+{
+
+	/* get device status */
+	if (viafb_CRT_ON == 1)
+		setting_info->device_status = CRT_Device;
+	if (viafb_DVI_ON == 1)
+		setting_info->device_status |= DVI_Device;
+	if (viafb_LCD_ON == 1)
+		setting_info->device_status |= LCD_Device;
+	if (viafb_LCD2_ON == 1)
+		setting_info->device_status |= LCD2_Device;
+
+	setting_info->samm_status = viafb_SAMM_ON;
+	setting_info->primary_device = get_primary_device();
+
+	setting_info->first_dev_bpp = viafb_bpp;
+	setting_info->second_dev_bpp = viafb_bpp1;
+
+	setting_info->first_dev_refresh = viafb_refresh;
+	setting_info->second_dev_refresh = viafb_refresh1;
+
+	setting_info->first_dev_hor_res = viafb_hotplug_Xres;
+	setting_info->first_dev_ver_res = viafb_hotplug_Yres;
+	setting_info->second_dev_hor_res = viafb_second_xres;
+	setting_info->second_dev_ver_res = viafb_second_yres;
+
+	/* Get lcd attributes */
+	setting_info->lcd_attributes.display_center = viafb_lcd_dsp_method;
+	setting_info->lcd_attributes.panel_id = viafb_lcd_panel_id;
+	setting_info->lcd_attributes.lcd_mode = viafb_lcd_mode;
+}
+
+static int __init parse_active_dev(void)
+{
+	viafb_CRT_ON = STATE_OFF;
+	viafb_DVI_ON = STATE_OFF;
+	viafb_LCD_ON = STATE_OFF;
+	viafb_LCD2_ON = STATE_OFF;
+	/* 1. Modify the active status of devices. */
+	/* 2. Keep the order of devices, so we can set corresponding
+	   IGA path to devices in SAMM case. */
+	/*    Note: The previous of active_dev is primary device,
+	   and the following is secondary device. */
+	if (!viafb_active_dev) {
+		if (machine_is_olpc()) { /* LCD only */
+			viafb_LCD_ON = STATE_ON;
+			viafb_SAMM_ON = STATE_OFF;
+		} else {
+			viafb_CRT_ON = STATE_ON;
+			viafb_SAMM_ON = STATE_OFF;
+		}
+	} else if (!strcmp(viafb_active_dev, "CRT+DVI")) {
+		/* CRT+DVI */
+		viafb_CRT_ON = STATE_ON;
+		viafb_DVI_ON = STATE_ON;
+		viafb_primary_dev = CRT_Device;
+	} else if (!strcmp(viafb_active_dev, "DVI+CRT")) {
+		/* DVI+CRT */
+		viafb_CRT_ON = STATE_ON;
+		viafb_DVI_ON = STATE_ON;
+		viafb_primary_dev = DVI_Device;
+	} else if (!strcmp(viafb_active_dev, "CRT+LCD")) {
+		/* CRT+LCD */
+		viafb_CRT_ON = STATE_ON;
+		viafb_LCD_ON = STATE_ON;
+		viafb_primary_dev = CRT_Device;
+	} else if (!strcmp(viafb_active_dev, "LCD+CRT")) {
+		/* LCD+CRT */
+		viafb_CRT_ON = STATE_ON;
+		viafb_LCD_ON = STATE_ON;
+		viafb_primary_dev = LCD_Device;
+	} else if (!strcmp(viafb_active_dev, "DVI+LCD")) {
+		/* DVI+LCD */
+		viafb_DVI_ON = STATE_ON;
+		viafb_LCD_ON = STATE_ON;
+		viafb_primary_dev = DVI_Device;
+	} else if (!strcmp(viafb_active_dev, "LCD+DVI")) {
+		/* LCD+DVI */
+		viafb_DVI_ON = STATE_ON;
+		viafb_LCD_ON = STATE_ON;
+		viafb_primary_dev = LCD_Device;
+	} else if (!strcmp(viafb_active_dev, "LCD+LCD2")) {
+		viafb_LCD_ON = STATE_ON;
+		viafb_LCD2_ON = STATE_ON;
+		viafb_primary_dev = LCD_Device;
+	} else if (!strcmp(viafb_active_dev, "LCD2+LCD")) {
+		viafb_LCD_ON = STATE_ON;
+		viafb_LCD2_ON = STATE_ON;
+		viafb_primary_dev = LCD2_Device;
+	} else if (!strcmp(viafb_active_dev, "CRT")) {
+		/* CRT only */
+		viafb_CRT_ON = STATE_ON;
+		viafb_SAMM_ON = STATE_OFF;
+	} else if (!strcmp(viafb_active_dev, "DVI")) {
+		/* DVI only */
+		viafb_DVI_ON = STATE_ON;
+		viafb_SAMM_ON = STATE_OFF;
+	} else if (!strcmp(viafb_active_dev, "LCD")) {
+		/* LCD only */
+		viafb_LCD_ON = STATE_ON;
+		viafb_SAMM_ON = STATE_OFF;
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+static int parse_port(char *opt_str, int *output_interface)
+{
+	if (!strncmp(opt_str, "DVP0", 4))
+		*output_interface = INTERFACE_DVP0;
+	else if (!strncmp(opt_str, "DVP1", 4))
+		*output_interface = INTERFACE_DVP1;
+	else if (!strncmp(opt_str, "DFP_HIGHLOW", 11))
+		*output_interface = INTERFACE_DFP;
+	else if (!strncmp(opt_str, "DFP_HIGH", 8))
+		*output_interface = INTERFACE_DFP_HIGH;
+	else if (!strncmp(opt_str, "DFP_LOW", 7))
+		*output_interface = INTERFACE_DFP_LOW;
+	else
+		*output_interface = INTERFACE_NONE;
+	return 0;
+}
+
+static void parse_lcd_port(void)
+{
+	parse_port(viafb_lcd_port, &viaparinfo->chip_info->lvds_chip_info.
+		output_interface);
+	/*Initialize to avoid unexpected behavior */
+	viaparinfo->chip_info->lvds_chip_info2.output_interface =
+	INTERFACE_NONE;
+
+	DEBUG_MSG(KERN_INFO "parse_lcd_port: viafb_lcd_port:%s,interface:%d\n",
+		  viafb_lcd_port, viaparinfo->chip_info->lvds_chip_info.
+		  output_interface);
+}
+
+static void parse_dvi_port(void)
+{
+	parse_port(viafb_dvi_port, &viaparinfo->chip_info->tmds_chip_info.
+		output_interface);
+
+	DEBUG_MSG(KERN_INFO "parse_dvi_port: viafb_dvi_port:%s,interface:%d\n",
+		  viafb_dvi_port, viaparinfo->chip_info->tmds_chip_info.
+		  output_interface);
+}
+
+#ifdef CONFIG_FB_VIA_DIRECT_PROCFS
+
+/*
+ * The proc filesystem read/write function, a simple proc implement to
+ * get/set the value of DPA  DVP0,   DVP0DataDriving,  DVP0ClockDriving, DVP1,
+ * DVP1Driving, DFPHigh, DFPLow CR96,   SR2A[5], SR1B[1], SR2A[4], SR1E[2],
+ * CR9B,    SR65,    CR97,    CR99
+ */
+static int viafb_dvp0_proc_show(struct seq_file *m, void *v)
+{
+	u8 dvp0_data_dri = 0, dvp0_clk_dri = 0, dvp0 = 0;
+	dvp0_data_dri =
+	    (viafb_read_reg(VIASR, SR2A) & BIT5) >> 4 |
+	    (viafb_read_reg(VIASR, SR1B) & BIT1) >> 1;
+	dvp0_clk_dri =
+	    (viafb_read_reg(VIASR, SR2A) & BIT4) >> 3 |
+	    (viafb_read_reg(VIASR, SR1E) & BIT2) >> 2;
+	dvp0 = viafb_read_reg(VIACR, CR96) & 0x0f;
+	seq_printf(m, "%x %x %x\n", dvp0, dvp0_data_dri, dvp0_clk_dri);
+	return 0;
+}
+
+static int viafb_dvp0_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_dvp0_proc_show, NULL);
+}
+
+static ssize_t viafb_dvp0_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	char buf[20], *value, *pbuf;
+	u8 reg_val = 0;
+	unsigned long length, i;
+	if (count < 1)
+		return -EINVAL;
+	length = count > 20 ? 20 : count;
+	if (copy_from_user(&buf[0], buffer, length))
+		return -EFAULT;
+	buf[length - 1] = '\0';	/*Ensure end string */
+	pbuf = &buf[0];
+	for (i = 0; i < 3; i++) {
+		value = strsep(&pbuf, " ");
+		if (value != NULL) {
+			if (kstrtou8(value, 0, &reg_val) < 0)
+				return -EINVAL;
+			DEBUG_MSG(KERN_INFO "DVP0:reg_val[%lu]=:%x\n", i,
+				  reg_val);
+			switch (i) {
+			case 0:
+				viafb_write_reg_mask(CR96, VIACR,
+					reg_val, 0x0f);
+				break;
+			case 1:
+				viafb_write_reg_mask(SR2A, VIASR,
+					reg_val << 4, BIT5);
+				viafb_write_reg_mask(SR1B, VIASR,
+					reg_val << 1, BIT1);
+				break;
+			case 2:
+				viafb_write_reg_mask(SR2A, VIASR,
+					reg_val << 3, BIT4);
+				viafb_write_reg_mask(SR1E, VIASR,
+					reg_val << 2, BIT2);
+				break;
+			default:
+				break;
+			}
+		} else {
+			break;
+		}
+	}
+	return count;
+}
+
+static const struct proc_ops viafb_dvp0_proc_ops = {
+	.proc_open	= viafb_dvp0_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_dvp0_proc_write,
+};
+
+static int viafb_dvp1_proc_show(struct seq_file *m, void *v)
+{
+	u8 dvp1 = 0, dvp1_data_dri = 0, dvp1_clk_dri = 0;
+	dvp1 = viafb_read_reg(VIACR, CR9B) & 0x0f;
+	dvp1_data_dri = (viafb_read_reg(VIASR, SR65) & 0x0c) >> 2;
+	dvp1_clk_dri = viafb_read_reg(VIASR, SR65) & 0x03;
+	seq_printf(m, "%x %x %x\n", dvp1, dvp1_data_dri, dvp1_clk_dri);
+	return 0;
+}
+
+static int viafb_dvp1_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_dvp1_proc_show, NULL);
+}
+
+static ssize_t viafb_dvp1_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	char buf[20], *value, *pbuf;
+	u8 reg_val = 0;
+	unsigned long length, i;
+	if (count < 1)
+		return -EINVAL;
+	length = count > 20 ? 20 : count;
+	if (copy_from_user(&buf[0], buffer, length))
+		return -EFAULT;
+	buf[length - 1] = '\0';	/*Ensure end string */
+	pbuf = &buf[0];
+	for (i = 0; i < 3; i++) {
+		value = strsep(&pbuf, " ");
+		if (value != NULL) {
+			if (kstrtou8(value, 0, &reg_val) < 0)
+				return -EINVAL;
+			switch (i) {
+			case 0:
+				viafb_write_reg_mask(CR9B, VIACR,
+					reg_val, 0x0f);
+				break;
+			case 1:
+				viafb_write_reg_mask(SR65, VIASR,
+					reg_val << 2, 0x0c);
+				break;
+			case 2:
+				viafb_write_reg_mask(SR65, VIASR,
+					reg_val, 0x03);
+				break;
+			default:
+				break;
+			}
+		} else {
+			break;
+		}
+	}
+	return count;
+}
+
+static const struct proc_ops viafb_dvp1_proc_ops = {
+	.proc_open	= viafb_dvp1_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_dvp1_proc_write,
+};
+
+static int viafb_dfph_proc_show(struct seq_file *m, void *v)
+{
+	u8 dfp_high = 0;
+	dfp_high = viafb_read_reg(VIACR, CR97) & 0x0f;
+	seq_printf(m, "%x\n", dfp_high);
+	return 0;
+}
+
+static int viafb_dfph_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_dfph_proc_show, NULL);
+}
+
+static ssize_t viafb_dfph_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	int err;
+	u8 reg_val;
+	err = kstrtou8_from_user(buffer, count, 0, &reg_val);
+	if (err)
+		return err;
+
+	viafb_write_reg_mask(CR97, VIACR, reg_val, 0x0f);
+	return count;
+}
+
+static const struct proc_ops viafb_dfph_proc_ops = {
+	.proc_open	= viafb_dfph_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_dfph_proc_write,
+};
+
+static int viafb_dfpl_proc_show(struct seq_file *m, void *v)
+{
+	u8 dfp_low = 0;
+	dfp_low = viafb_read_reg(VIACR, CR99) & 0x0f;
+	seq_printf(m, "%x\n", dfp_low);
+	return 0;
+}
+
+static int viafb_dfpl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_dfpl_proc_show, NULL);
+}
+
+static ssize_t viafb_dfpl_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	int err;
+	u8 reg_val;
+	err = kstrtou8_from_user(buffer, count, 0, &reg_val);
+	if (err)
+		return err;
+
+	viafb_write_reg_mask(CR99, VIACR, reg_val, 0x0f);
+	return count;
+}
+
+static const struct proc_ops viafb_dfpl_proc_ops = {
+	.proc_open	= viafb_dfpl_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_dfpl_proc_write,
+};
+
+static int viafb_vt1636_proc_show(struct seq_file *m, void *v)
+{
+	u8 vt1636_08 = 0, vt1636_09 = 0;
+	switch (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+	case VT1636_LVDS:
+		vt1636_08 =
+		    viafb_gpio_i2c_read_lvds(viaparinfo->lvds_setting_info,
+		    &viaparinfo->chip_info->lvds_chip_info, 0x08) & 0x0f;
+		vt1636_09 =
+		    viafb_gpio_i2c_read_lvds(viaparinfo->lvds_setting_info,
+		    &viaparinfo->chip_info->lvds_chip_info, 0x09) & 0x1f;
+		seq_printf(m, "%x %x\n", vt1636_08, vt1636_09);
+		break;
+	default:
+		break;
+	}
+	switch (viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name) {
+	case VT1636_LVDS:
+		vt1636_08 =
+		    viafb_gpio_i2c_read_lvds(viaparinfo->lvds_setting_info2,
+			&viaparinfo->chip_info->lvds_chip_info2, 0x08) & 0x0f;
+		vt1636_09 =
+		    viafb_gpio_i2c_read_lvds(viaparinfo->lvds_setting_info2,
+			&viaparinfo->chip_info->lvds_chip_info2, 0x09) & 0x1f;
+		seq_printf(m, " %x %x\n", vt1636_08, vt1636_09);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int viafb_vt1636_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_vt1636_proc_show, NULL);
+}
+
+static ssize_t viafb_vt1636_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	char buf[30], *value, *pbuf;
+	struct IODATA reg_val;
+	unsigned long length, i;
+	if (count < 1)
+		return -EINVAL;
+	length = count > 30 ? 30 : count;
+	if (copy_from_user(&buf[0], buffer, length))
+		return -EFAULT;
+	buf[length - 1] = '\0';	/*Ensure end string */
+	pbuf = &buf[0];
+	switch (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+	case VT1636_LVDS:
+		for (i = 0; i < 2; i++) {
+			value = strsep(&pbuf, " ");
+			if (value != NULL) {
+				if (kstrtou8(value, 0, &reg_val.Data) < 0)
+					return -EINVAL;
+				switch (i) {
+				case 0:
+					reg_val.Index = 0x08;
+					reg_val.Mask = 0x0f;
+					viafb_gpio_i2c_write_mask_lvds
+					    (viaparinfo->lvds_setting_info,
+					    &viaparinfo->
+					    chip_info->lvds_chip_info,
+					     reg_val);
+					break;
+				case 1:
+					reg_val.Index = 0x09;
+					reg_val.Mask = 0x1f;
+					viafb_gpio_i2c_write_mask_lvds
+					    (viaparinfo->lvds_setting_info,
+					    &viaparinfo->
+					    chip_info->lvds_chip_info,
+					     reg_val);
+					break;
+				default:
+					break;
+				}
+			} else {
+				break;
+			}
+		}
+		break;
+	default:
+		break;
+	}
+	switch (viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name) {
+	case VT1636_LVDS:
+		for (i = 0; i < 2; i++) {
+			value = strsep(&pbuf, " ");
+			if (value != NULL) {
+				if (kstrtou8(value, 0, &reg_val.Data) < 0)
+					return -EINVAL;
+				switch (i) {
+				case 0:
+					reg_val.Index = 0x08;
+					reg_val.Mask = 0x0f;
+					viafb_gpio_i2c_write_mask_lvds
+					    (viaparinfo->lvds_setting_info2,
+					    &viaparinfo->
+					    chip_info->lvds_chip_info2,
+					     reg_val);
+					break;
+				case 1:
+					reg_val.Index = 0x09;
+					reg_val.Mask = 0x1f;
+					viafb_gpio_i2c_write_mask_lvds
+					    (viaparinfo->lvds_setting_info2,
+					    &viaparinfo->
+					    chip_info->lvds_chip_info2,
+					     reg_val);
+					break;
+				default:
+					break;
+				}
+			} else {
+				break;
+			}
+		}
+		break;
+	default:
+		break;
+	}
+	return count;
+}
+
+static const struct proc_ops viafb_vt1636_proc_ops = {
+	.proc_open	= viafb_vt1636_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_vt1636_proc_write,
+};
+
+#endif /* CONFIG_FB_VIA_DIRECT_PROCFS */
+
+static int __maybe_unused viafb_sup_odev_proc_show(struct seq_file *m, void *v)
+{
+	via_odev_to_seq(m, supported_odev_map[
+		viaparinfo->shared->chip_info.gfx_chip_name]);
+	return 0;
+}
+
+static ssize_t odev_update(const char __user *buffer, size_t count, u32 *odev)
+{
+	char buf[64], *ptr = buf;
+	u32 devices;
+	bool add, sub;
+
+	if (count < 1 || count > 63)
+		return -EINVAL;
+	if (copy_from_user(&buf[0], buffer, count))
+		return -EFAULT;
+	buf[count] = '\0';
+	add = buf[0] == '+';
+	sub = buf[0] == '-';
+	if (add || sub)
+		ptr++;
+	devices = via_parse_odev(ptr, &ptr);
+	if (*ptr == '\n')
+		ptr++;
+	if (*ptr != 0)
+		return -EINVAL;
+	if (add)
+		*odev |= devices;
+	else if (sub)
+		*odev &= ~devices;
+	else
+		*odev = devices;
+	return count;
+}
+
+static int viafb_iga1_odev_proc_show(struct seq_file *m, void *v)
+{
+	via_odev_to_seq(m, viaparinfo->shared->iga1_devices);
+	return 0;
+}
+
+static int viafb_iga1_odev_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_iga1_odev_proc_show, NULL);
+}
+
+static ssize_t viafb_iga1_odev_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	u32 dev_on, dev_off, dev_old, dev_new;
+	ssize_t res;
+
+	dev_old = dev_new = viaparinfo->shared->iga1_devices;
+	res = odev_update(buffer, count, &dev_new);
+	if (res != count)
+		return res;
+	dev_off = dev_old & ~dev_new;
+	dev_on = dev_new & ~dev_old;
+	viaparinfo->shared->iga1_devices = dev_new;
+	viaparinfo->shared->iga2_devices &= ~dev_new;
+	via_set_state(dev_off, VIA_STATE_OFF);
+	via_set_source(dev_new, IGA1);
+	via_set_state(dev_on, VIA_STATE_ON);
+	return res;
+}
+
+static const struct proc_ops viafb_iga1_odev_proc_ops = {
+	.proc_open	= viafb_iga1_odev_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_iga1_odev_proc_write,
+};
+
+static int viafb_iga2_odev_proc_show(struct seq_file *m, void *v)
+{
+	via_odev_to_seq(m, viaparinfo->shared->iga2_devices);
+	return 0;
+}
+
+static int viafb_iga2_odev_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, viafb_iga2_odev_proc_show, NULL);
+}
+
+static ssize_t viafb_iga2_odev_proc_write(struct file *file,
+	const char __user *buffer, size_t count, loff_t *pos)
+{
+	u32 dev_on, dev_off, dev_old, dev_new;
+	ssize_t res;
+
+	dev_old = dev_new = viaparinfo->shared->iga2_devices;
+	res = odev_update(buffer, count, &dev_new);
+	if (res != count)
+		return res;
+	dev_off = dev_old & ~dev_new;
+	dev_on = dev_new & ~dev_old;
+	viaparinfo->shared->iga2_devices = dev_new;
+	viaparinfo->shared->iga1_devices &= ~dev_new;
+	via_set_state(dev_off, VIA_STATE_OFF);
+	via_set_source(dev_new, IGA2);
+	via_set_state(dev_on, VIA_STATE_ON);
+	return res;
+}
+
+static const struct proc_ops viafb_iga2_odev_proc_ops = {
+	.proc_open	= viafb_iga2_odev_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= viafb_iga2_odev_proc_write,
+};
+
+#define IS_VT1636(lvds_chip)	((lvds_chip).lvds_chip_name == VT1636_LVDS)
+static void viafb_init_proc(struct viafb_shared *shared)
+{
+	struct proc_dir_entry *iga1_entry, *iga2_entry,
+		*viafb_entry = proc_mkdir("viafb", NULL);
+
+	shared->proc_entry = viafb_entry;
+	if (viafb_entry) {
+#ifdef CONFIG_FB_VIA_DIRECT_PROCFS
+		proc_create("dvp0", 0, viafb_entry, &viafb_dvp0_proc_ops);
+		proc_create("dvp1", 0, viafb_entry, &viafb_dvp1_proc_ops);
+		proc_create("dfph", 0, viafb_entry, &viafb_dfph_proc_ops);
+		proc_create("dfpl", 0, viafb_entry, &viafb_dfpl_proc_ops);
+		if (IS_VT1636(shared->chip_info.lvds_chip_info)
+			|| IS_VT1636(shared->chip_info.lvds_chip_info2))
+			proc_create("vt1636", 0, viafb_entry,
+				    &viafb_vt1636_proc_ops);
+#endif /* CONFIG_FB_VIA_DIRECT_PROCFS */
+
+		proc_create_single("supported_output_devices", 0, viafb_entry,
+			viafb_sup_odev_proc_show);
+		iga1_entry = proc_mkdir("iga1", viafb_entry);
+		shared->iga1_proc_entry = iga1_entry;
+		proc_create("output_devices", 0, iga1_entry,
+			    &viafb_iga1_odev_proc_ops);
+		iga2_entry = proc_mkdir("iga2", viafb_entry);
+		shared->iga2_proc_entry = iga2_entry;
+		proc_create("output_devices", 0, iga2_entry,
+			    &viafb_iga2_odev_proc_ops);
+	}
+}
+static void viafb_remove_proc(struct viafb_shared *shared)
+{
+	struct proc_dir_entry *viafb_entry = shared->proc_entry;
+
+	if (!viafb_entry)
+		return;
+
+	remove_proc_entry("output_devices", shared->iga2_proc_entry);
+	remove_proc_entry("iga2", viafb_entry);
+	remove_proc_entry("output_devices", shared->iga1_proc_entry);
+	remove_proc_entry("iga1", viafb_entry);
+	remove_proc_entry("supported_output_devices", viafb_entry);
+
+#ifdef CONFIG_FB_VIA_DIRECT_PROCFS
+	remove_proc_entry("dvp0", viafb_entry);/* parent dir */
+	remove_proc_entry("dvp1", viafb_entry);
+	remove_proc_entry("dfph", viafb_entry);
+	remove_proc_entry("dfpl", viafb_entry);
+	if (IS_VT1636(shared->chip_info.lvds_chip_info)
+		|| IS_VT1636(shared->chip_info.lvds_chip_info2))
+		remove_proc_entry("vt1636", viafb_entry);
+#endif /* CONFIG_FB_VIA_DIRECT_PROCFS */
+
+	remove_proc_entry("viafb", NULL);
+}
+#undef IS_VT1636
+
+static int parse_mode(const char *str, u32 devices, u32 *xres, u32 *yres)
+{
+	const struct fb_videomode *mode = NULL;
+	char *ptr;
+
+	if (!str) {
+		if (devices == VIA_CRT)
+			mode = via_aux_get_preferred_mode(
+				viaparinfo->shared->i2c_26);
+		else if (devices == VIA_DVP1)
+			mode = via_aux_get_preferred_mode(
+				viaparinfo->shared->i2c_31);
+
+		if (mode) {
+			*xres = mode->xres;
+			*yres = mode->yres;
+		} else if (machine_is_olpc()) {
+			*xres = 1200;
+			*yres = 900;
+		} else {
+			*xres = 640;
+			*yres = 480;
+		}
+		return 0;
+	}
+
+	*xres = simple_strtoul(str, &ptr, 10);
+	if (ptr[0] != 'x')
+		return -EINVAL;
+
+	*yres = simple_strtoul(&ptr[1], &ptr, 10);
+	if (ptr[0])
+		return -EINVAL;
+
+	return 0;
+}
+
+
+#ifdef CONFIG_PM
+static int viafb_suspend(void *unused)
+{
+	console_lock();
+	fb_set_suspend(viafbinfo, 1);
+	viafb_sync(viafbinfo);
+	console_unlock();
+
+	return 0;
+}
+
+static int viafb_resume(void *unused)
+{
+	console_lock();
+	if (viaparinfo->shared->vdev->engine_mmio)
+		viafb_reset_engine(viaparinfo);
+	viafb_set_par(viafbinfo);
+	if (viafb_dual_fb)
+		viafb_set_par(viafbinfo1);
+	fb_set_suspend(viafbinfo, 0);
+
+	console_unlock();
+	return 0;
+}
+
+static struct viafb_pm_hooks viafb_fb_pm_hooks = {
+	.suspend = viafb_suspend,
+	.resume = viafb_resume
+};
+
+#endif
+
+static void i2c_bus_probe(struct viafb_shared *shared)
+{
+	/* should be always CRT */
+	printk(KERN_INFO "viafb: Probing I2C bus 0x26\n");
+	shared->i2c_26 = via_aux_probe(viafb_find_i2c_adapter(VIA_PORT_26));
+
+	/* seems to be usually DVP1 */
+	printk(KERN_INFO "viafb: Probing I2C bus 0x31\n");
+	shared->i2c_31 = via_aux_probe(viafb_find_i2c_adapter(VIA_PORT_31));
+
+	/* FIXME: what is this? */
+	if (!machine_is_olpc()) {
+		printk(KERN_INFO "viafb: Probing I2C bus 0x2C\n");
+		shared->i2c_2C = via_aux_probe(viafb_find_i2c_adapter(VIA_PORT_2C));
+	}
+
+	printk(KERN_INFO "viafb: Finished I2C bus probing");
+}
+
+static void i2c_bus_free(struct viafb_shared *shared)
+{
+	via_aux_free(shared->i2c_26);
+	via_aux_free(shared->i2c_31);
+	via_aux_free(shared->i2c_2C);
+}
+
+int via_fb_pci_probe(struct viafb_dev *vdev)
+{
+	u32 default_xres, default_yres;
+	struct fb_var_screeninfo default_var;
+	int rc;
+	u32 viafb_par_length;
+
+	DEBUG_MSG(KERN_INFO "VIAFB PCI Probe!!\n");
+	memset(&default_var, 0, sizeof(default_var));
+	viafb_par_length = ALIGN(sizeof(struct viafb_par), BITS_PER_LONG/8);
+
+	/* Allocate fb_info and ***_par here, also including some other needed
+	 * variables
+	*/
+	viafbinfo = framebuffer_alloc(viafb_par_length +
+		ALIGN(sizeof(struct viafb_shared), BITS_PER_LONG/8),
+		&vdev->pdev->dev);
+	if (!viafbinfo)
+		return -ENOMEM;
+
+	viaparinfo = (struct viafb_par *)viafbinfo->par;
+	viaparinfo->shared = viafbinfo->par + viafb_par_length;
+	viaparinfo->shared->vdev = vdev;
+	viaparinfo->vram_addr = 0;
+	viaparinfo->tmds_setting_info = &viaparinfo->shared->tmds_setting_info;
+	viaparinfo->lvds_setting_info = &viaparinfo->shared->lvds_setting_info;
+	viaparinfo->lvds_setting_info2 =
+		&viaparinfo->shared->lvds_setting_info2;
+	viaparinfo->chip_info = &viaparinfo->shared->chip_info;
+
+	i2c_bus_probe(viaparinfo->shared);
+	if (viafb_dual_fb)
+		viafb_SAMM_ON = 1;
+	parse_lcd_port();
+	parse_dvi_port();
+
+	viafb_init_chip_info(vdev->chip_type);
+	/*
+	 * The framebuffer will have been successfully mapped by
+	 * the core (or we'd not be here), but we still need to
+	 * set up our own accounting.
+	 */
+	viaparinfo->fbmem = vdev->fbmem_start;
+	viaparinfo->memsize = vdev->fbmem_len;
+	viaparinfo->fbmem_free = viaparinfo->memsize;
+	viaparinfo->fbmem_used = 0;
+	viafbinfo->screen_base = vdev->fbmem;
+
+	viafbinfo->fix.mmio_start = vdev->engine_start;
+	viafbinfo->fix.mmio_len = vdev->engine_len;
+	viafbinfo->node = 0;
+	viafbinfo->fbops = &viafb_ops;
+	viafbinfo->flags = FBINFO_HWACCEL_YPAN;
+
+	viafbinfo->pseudo_palette = pseudo_pal;
+	if (viafb_accel && !viafb_setup_engine(viafbinfo)) {
+		viafbinfo->flags |= FBINFO_HWACCEL_COPYAREA |
+			FBINFO_HWACCEL_FILLRECT |  FBINFO_HWACCEL_IMAGEBLIT;
+		default_var.accel_flags = FB_ACCELF_TEXT;
+	} else {
+		viafbinfo->flags |= FBINFO_HWACCEL_DISABLED;
+		default_var.accel_flags = 0;
+	}
+
+	if (viafb_second_size && (viafb_second_size < 8)) {
+		viafb_second_offset = viaparinfo->fbmem_free -
+			viafb_second_size * 1024 * 1024;
+	} else {
+		viafb_second_size = 8;
+		viafb_second_offset = viaparinfo->fbmem_free -
+			viafb_second_size * 1024 * 1024;
+	}
+
+	parse_mode(viafb_mode, viaparinfo->shared->iga1_devices,
+		&default_xres, &default_yres);
+	if (viafb_SAMM_ON == 1)
+		parse_mode(viafb_mode1, viaparinfo->shared->iga2_devices,
+			&viafb_second_xres, &viafb_second_yres);
+
+	default_var.xres = default_xres;
+	default_var.yres = default_yres;
+	default_var.xres_virtual = default_xres;
+	default_var.yres_virtual = default_yres;
+	default_var.bits_per_pixel = viafb_bpp;
+	viafb_fill_var_timing_info(&default_var, viafb_get_best_mode(
+		default_var.xres, default_var.yres, viafb_refresh));
+	viafb_setup_fixinfo(&viafbinfo->fix, viaparinfo);
+	viafbinfo->var = default_var;
+
+	if (viafb_dual_fb) {
+		viafbinfo1 = framebuffer_alloc(viafb_par_length,
+				&vdev->pdev->dev);
+		if (!viafbinfo1) {
+			rc = -ENOMEM;
+			goto out_fb_release;
+		}
+		viaparinfo1 = viafbinfo1->par;
+		memcpy(viaparinfo1, viaparinfo, viafb_par_length);
+		viaparinfo1->vram_addr = viafb_second_offset;
+		viaparinfo1->memsize = viaparinfo->memsize -
+			viafb_second_offset;
+		viaparinfo->memsize = viafb_second_offset;
+		viaparinfo1->fbmem = viaparinfo->fbmem + viafb_second_offset;
+
+		viaparinfo1->fbmem_used = viaparinfo->fbmem_used;
+		viaparinfo1->fbmem_free = viaparinfo1->memsize -
+			viaparinfo1->fbmem_used;
+		viaparinfo->fbmem_free = viaparinfo->memsize;
+		viaparinfo->fbmem_used = 0;
+
+		viaparinfo->iga_path = IGA1;
+		viaparinfo1->iga_path = IGA2;
+		memcpy(viafbinfo1, viafbinfo, sizeof(struct fb_info));
+		viafbinfo1->par = viaparinfo1;
+		viafbinfo1->screen_base = viafbinfo->screen_base +
+			viafb_second_offset;
+
+		default_var.xres = viafb_second_xres;
+		default_var.yres = viafb_second_yres;
+		default_var.xres_virtual = viafb_second_xres;
+		default_var.yres_virtual = viafb_second_yres;
+		default_var.bits_per_pixel = viafb_bpp1;
+		viafb_fill_var_timing_info(&default_var, viafb_get_best_mode(
+			default_var.xres, default_var.yres, viafb_refresh1));
+
+		viafb_setup_fixinfo(&viafbinfo1->fix, viaparinfo1);
+		viafb_check_var(&default_var, viafbinfo1);
+		viafbinfo1->var = default_var;
+		viafb_update_fix(viafbinfo1);
+		viaparinfo1->depth = fb_get_color_depth(&viafbinfo1->var,
+			&viafbinfo1->fix);
+	}
+
+	viafb_check_var(&viafbinfo->var, viafbinfo);
+	viafb_update_fix(viafbinfo);
+	viaparinfo->depth = fb_get_color_depth(&viafbinfo->var,
+		&viafbinfo->fix);
+	default_var.activate = FB_ACTIVATE_NOW;
+	rc = fb_alloc_cmap(&viafbinfo->cmap, 256, 0);
+	if (rc)
+		goto out_fb1_release;
+
+	if (viafb_dual_fb && (viafb_primary_dev == LCD_Device)
+	    && (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)) {
+		rc = register_framebuffer(viafbinfo1);
+		if (rc)
+			goto out_dealloc_cmap;
+	}
+	rc = register_framebuffer(viafbinfo);
+	if (rc)
+		goto out_fb1_unreg_lcd_cle266;
+
+	if (viafb_dual_fb && ((viafb_primary_dev != LCD_Device)
+			|| (viaparinfo->chip_info->gfx_chip_name !=
+			UNICHROME_CLE266))) {
+		rc = register_framebuffer(viafbinfo1);
+		if (rc)
+			goto out_fb_unreg;
+	}
+	DEBUG_MSG(KERN_INFO "fb%d: %s frame buffer device %dx%d-%dbpp\n",
+		  viafbinfo->node, viafbinfo->fix.id, default_var.xres,
+		  default_var.yres, default_var.bits_per_pixel);
+
+	viafb_init_proc(viaparinfo->shared);
+	viafb_init_dac(IGA2);
+
+#ifdef CONFIG_PM
+	viafb_pm_register(&viafb_fb_pm_hooks);
+#endif
+	return 0;
+
+out_fb_unreg:
+	unregister_framebuffer(viafbinfo);
+out_fb1_unreg_lcd_cle266:
+	if (viafb_dual_fb && (viafb_primary_dev == LCD_Device)
+	    && (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266))
+		unregister_framebuffer(viafbinfo1);
+out_dealloc_cmap:
+	fb_dealloc_cmap(&viafbinfo->cmap);
+out_fb1_release:
+	framebuffer_release(viafbinfo1);
+out_fb_release:
+	i2c_bus_free(viaparinfo->shared);
+	framebuffer_release(viafbinfo);
+	return rc;
+}
+
+void via_fb_pci_remove(struct pci_dev *pdev)
+{
+	DEBUG_MSG(KERN_INFO "via_pci_remove!\n");
+	fb_dealloc_cmap(&viafbinfo->cmap);
+	unregister_framebuffer(viafbinfo);
+	if (viafb_dual_fb)
+		unregister_framebuffer(viafbinfo1);
+	viafb_remove_proc(viaparinfo->shared);
+	i2c_bus_free(viaparinfo->shared);
+	framebuffer_release(viafbinfo);
+	if (viafb_dual_fb)
+		framebuffer_release(viafbinfo1);
+}
+
+#ifndef MODULE
+static int __init viafb_setup(void)
+{
+	char *this_opt;
+	char *options;
+
+	DEBUG_MSG(KERN_INFO "viafb_setup!\n");
+
+	if (fb_get_options("viafb", &options))
+		return -ENODEV;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt)
+			continue;
+
+		if (!strncmp(this_opt, "viafb_mode1=", 12)) {
+			viafb_mode1 = kstrdup(this_opt + 12, GFP_KERNEL);
+			if (!viafb_mode1)
+				return -ENOMEM;
+		} else if (!strncmp(this_opt, "viafb_mode=", 11)) {
+			viafb_mode = kstrdup(this_opt + 11, GFP_KERNEL);
+			if (!viafb_mode)
+				return -ENOMEM;
+		} else if (!strncmp(this_opt, "viafb_bpp1=", 11)) {
+			if (kstrtouint(this_opt + 11, 0, &viafb_bpp1) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_bpp=", 10)) {
+			if (kstrtouint(this_opt + 10, 0, &viafb_bpp) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_refresh1=", 15)) {
+			if (kstrtoint(this_opt + 15, 0, &viafb_refresh1) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_refresh=", 14)) {
+			if (kstrtoint(this_opt + 14, 0, &viafb_refresh) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_lcd_dsp_method=", 21)) {
+			if (kstrtoint(this_opt + 21, 0,
+				      &viafb_lcd_dsp_method) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_lcd_panel_id=", 19)) {
+			if (kstrtoint(this_opt + 19, 0,
+				      &viafb_lcd_panel_id) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_accel=", 12)) {
+			if (kstrtoint(this_opt + 12, 0, &viafb_accel) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_SAMM_ON=", 14)) {
+			if (kstrtoint(this_opt + 14, 0, &viafb_SAMM_ON) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_active_dev=", 17)) {
+			viafb_active_dev = kstrdup(this_opt + 17, GFP_KERNEL);
+			if (!viafb_active_dev)
+				return -ENOMEM;
+		} else if (!strncmp(this_opt,
+			"viafb_display_hardware_layout=", 30)) {
+			if (kstrtoint(this_opt + 30, 0,
+				      &viafb_display_hardware_layout) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_second_size=", 18)) {
+			if (kstrtoint(this_opt + 18, 0, &viafb_second_size) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt,
+			"viafb_platform_epia_dvi=", 24)) {
+			if (kstrtoint(this_opt + 24, 0,
+				      &viafb_platform_epia_dvi) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt,
+			"viafb_device_lcd_dualedge=", 26)) {
+			if (kstrtoint(this_opt + 26, 0,
+				      &viafb_device_lcd_dualedge) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_bus_width=", 16)) {
+			if (kstrtoint(this_opt + 16, 0, &viafb_bus_width) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_lcd_mode=", 15)) {
+			if (kstrtoint(this_opt + 15, 0, &viafb_lcd_mode) < 0)
+				return -EINVAL;
+		} else if (!strncmp(this_opt, "viafb_lcd_port=", 15)) {
+			viafb_lcd_port = kstrdup(this_opt + 15, GFP_KERNEL);
+			if (!viafb_lcd_port)
+				return -ENOMEM;
+		} else if (!strncmp(this_opt, "viafb_dvi_port=", 15)) {
+			viafb_dvi_port = kstrdup(this_opt + 15, GFP_KERNEL);
+			if (!viafb_dvi_port)
+				return -ENOMEM;
+		}
+	}
+	return 0;
+}
+#endif
+
+/*
+ * These are called out of via-core for now.
+ */
+int __init viafb_init(void)
+{
+	u32 dummy_x, dummy_y;
+	int r = 0;
+
+	if (machine_is_olpc())
+		/* Apply XO-1.5-specific configuration. */
+		viafb_lcd_panel_id = 23;
+
+#ifndef MODULE
+	r = viafb_setup();
+	if (r < 0)
+		return r;
+#endif
+	if (parse_mode(viafb_mode, 0, &dummy_x, &dummy_y)
+		|| !viafb_get_best_mode(dummy_x, dummy_y, viafb_refresh)
+		|| parse_mode(viafb_mode1, 0, &dummy_x, &dummy_y)
+		|| !viafb_get_best_mode(dummy_x, dummy_y, viafb_refresh1)
+		|| viafb_bpp < 0 || viafb_bpp > 32
+		|| viafb_bpp1 < 0 || viafb_bpp1 > 32
+		|| parse_active_dev())
+		return -EINVAL;
+
+	printk(KERN_INFO
+       "VIA Graphics Integration Chipset framebuffer %d.%d initializing\n",
+	       VERSION_MAJOR, VERSION_MINOR);
+	return r;
+}
+
+void __exit viafb_exit(void)
+{
+	DEBUG_MSG(KERN_INFO "viafb_exit!\n");
+}
+
+static struct fb_ops viafb_ops = {
+	.owner = THIS_MODULE,
+	.fb_open = viafb_open,
+	.fb_release = viafb_release,
+	.fb_check_var = viafb_check_var,
+	.fb_set_par = viafb_set_par,
+	.fb_setcolreg = viafb_setcolreg,
+	.fb_pan_display = viafb_pan_display,
+	.fb_blank = viafb_blank,
+	.fb_fillrect = viafb_fillrect,
+	.fb_copyarea = viafb_copyarea,
+	.fb_imageblit = viafb_imageblit,
+	.fb_cursor = viafb_cursor,
+	.fb_ioctl = viafb_ioctl,
+	.fb_sync = viafb_sync,
+};
+
+
+#ifdef MODULE
+module_param(viafb_mode, charp, S_IRUSR);
+MODULE_PARM_DESC(viafb_mode, "Set resolution (default=640x480)");
+
+module_param(viafb_mode1, charp, S_IRUSR);
+MODULE_PARM_DESC(viafb_mode1, "Set resolution (default=640x480)");
+
+module_param(viafb_bpp, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_bpp, "Set color depth (default=32bpp)");
+
+module_param(viafb_bpp1, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_bpp1, "Set color depth (default=32bpp)");
+
+module_param(viafb_refresh, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_refresh,
+	"Set CRT viafb_refresh rate (default = 60)");
+
+module_param(viafb_refresh1, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_refresh1,
+	"Set CRT refresh rate (default = 60)");
+
+module_param(viafb_lcd_panel_id, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_lcd_panel_id,
+	"Set Flat Panel type(Default=1024x768)");
+
+module_param(viafb_lcd_dsp_method, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_lcd_dsp_method,
+	"Set Flat Panel display scaling method.(Default=Expansion)");
+
+module_param(viafb_SAMM_ON, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_SAMM_ON,
+	"Turn on/off flag of SAMM(Default=OFF)");
+
+module_param(viafb_accel, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_accel,
+	"Set 2D Hardware Acceleration: 0 = OFF, 1 = ON (default)");
+
+module_param(viafb_active_dev, charp, S_IRUSR);
+MODULE_PARM_DESC(viafb_active_dev, "Specify active devices.");
+
+module_param(viafb_display_hardware_layout, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_display_hardware_layout,
+	"Display Hardware Layout (LCD Only, DVI Only...,etc)");
+
+module_param(viafb_second_size, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_second_size,
+	"Set secondary device memory size");
+
+module_param(viafb_dual_fb, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_dual_fb,
+	"Turn on/off flag of dual framebuffer devices.(Default = OFF)");
+
+module_param(viafb_platform_epia_dvi, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_platform_epia_dvi,
+	"Turn on/off flag of DVI devices on EPIA board.(Default = OFF)");
+
+module_param(viafb_device_lcd_dualedge, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_device_lcd_dualedge,
+	"Turn on/off flag of dual edge panel.(Default = OFF)");
+
+module_param(viafb_bus_width, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_bus_width,
+	"Set bus width of panel.(Default = 12)");
+
+module_param(viafb_lcd_mode, int, S_IRUSR);
+MODULE_PARM_DESC(viafb_lcd_mode,
+	"Set Flat Panel mode(Default=OPENLDI)");
+
+module_param(viafb_lcd_port, charp, S_IRUSR);
+MODULE_PARM_DESC(viafb_lcd_port, "Specify LCD output port.");
+
+module_param(viafb_dvi_port, charp, S_IRUSR);
+MODULE_PARM_DESC(viafb_dvi_port, "Specify DVI output port.");
+
+MODULE_LICENSE("GPL");
+#endif
diff --git a/drivers/video/fbdev/via/viafbdev.h b/drivers/video/fbdev/via/viafbdev.h
new file mode 100644
index 0000000000..e2adbc4efb
--- /dev/null
+++ b/drivers/video/fbdev/via/viafbdev.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __VIAFBDEV_H__
+#define __VIAFBDEV_H__
+
+#include <linux/proc_fs.h>
+#include <linux/fb.h>
+#include <linux/spinlock.h>
+
+#include "via_aux.h"
+#include "ioctl.h"
+#include "share.h"
+#include "chip.h"
+#include "hw.h"
+
+#define VERSION_MAJOR       2
+#define VERSION_KERNEL      6	/* For kernel 2.6 */
+
+#define VERSION_OS          0	/* 0: for 32 bits OS, 1: for 64 bits OS */
+#define VERSION_MINOR       4
+
+#define VIAFB_NUM_I2C		5
+
+struct viafb_shared {
+	u32 iga1_devices;
+	u32 iga2_devices;
+
+	struct proc_dir_entry *proc_entry;	/*viafb proc entry */
+	struct proc_dir_entry *iga1_proc_entry;
+	struct proc_dir_entry *iga2_proc_entry;
+	struct viafb_dev *vdev;			/* Global dev info */
+
+	/* I2C busses that may have auxiliary devices */
+	struct via_aux_bus *i2c_26;
+	struct via_aux_bus *i2c_31;
+	struct via_aux_bus *i2c_2C;
+
+	/* All the information will be needed to set engine */
+	struct tmds_setting_information tmds_setting_info;
+	struct lvds_setting_information lvds_setting_info;
+	struct lvds_setting_information lvds_setting_info2;
+	struct chip_information chip_info;
+
+	/* hardware acceleration stuff */
+	u32 cursor_vram_addr;
+	u32 vq_vram_addr;	/* virtual queue address in video ram */
+	int (*hw_bitblt)(void __iomem *engine, u8 op, u32 width, u32 height,
+		u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
+		u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
+		u32 fg_color, u32 bg_color, u8 fill_rop);
+};
+
+struct viafb_par {
+	u8 depth;
+	u32 vram_addr;
+
+	unsigned int fbmem;	/*framebuffer physical memory address */
+	unsigned int memsize;	/*size of fbmem */
+	u32 fbmem_free;		/* Free FB memory */
+	u32 fbmem_used;		/* Use FB memory size */
+	u32 iga_path;
+
+	struct viafb_shared *shared;
+
+	/* All the information will be needed to set engine */
+	/* depreciated, use the ones in shared directly */
+	struct tmds_setting_information *tmds_setting_info;
+	struct lvds_setting_information *lvds_setting_info;
+	struct lvds_setting_information *lvds_setting_info2;
+	struct chip_information *chip_info;
+};
+
+extern int viafb_SAMM_ON;
+extern int viafb_dual_fb;
+extern int viafb_LCD2_ON;
+extern int viafb_LCD_ON;
+extern int viafb_DVI_ON;
+extern int viafb_hotplug;
+
+u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information
+	*plvds_chip_info, u8 index);
+void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
+			      *plvds_setting_info, struct lvds_chip_information
+			      *plvds_chip_info, struct IODATA io_data);
+int via_fb_pci_probe(struct viafb_dev *vdev);
+void via_fb_pci_remove(struct pci_dev *pdev);
+/* Temporary */
+int viafb_init(void);
+void viafb_exit(void);
+#endif /* __VIAFBDEV_H__ */
diff --git a/drivers/video/fbdev/via/viamode.c b/drivers/video/fbdev/via/viamode.c
new file mode 100644
index 0000000000..31308e1930
--- /dev/null
+++ b/drivers/video/fbdev/via/viamode.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include <linux/via-core.h>
+#include "global.h"
+
+struct io_reg CN400_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
+{VIASR, SR15, 0x02, 0x02},
+{VIASR, SR16, 0xBF, 0x08},
+{VIASR, SR17, 0xFF, 0x1F},
+{VIASR, SR18, 0xFF, 0x4E},
+{VIASR, SR1A, 0xFB, 0x08},
+{VIASR, SR1E, 0x0F, 0x01},
+{VIASR, SR2A, 0xFF, 0x00},
+{VIACR, CR32, 0xFF, 0x00},
+{VIACR, CR33, 0xFF, 0x00},
+{VIACR, CR35, 0xFF, 0x00},
+{VIACR, CR36, 0x08, 0x00},
+{VIACR, CR69, 0xFF, 0x00},
+{VIACR, CR6A, 0xFF, 0x40},
+{VIACR, CR6B, 0xFF, 0x00},
+{VIACR, CR88, 0xFF, 0x40},	/* LCD Panel Type                      */
+{VIACR, CR89, 0xFF, 0x00},	/* LCD Timing Control 0                */
+{VIACR, CR8A, 0xFF, 0x88},	/* LCD Timing Control 1                */
+{VIACR, CR8B, 0xFF, 0x69},	/* LCD Power Sequence Control 0        */
+{VIACR, CR8C, 0xFF, 0x57},	/* LCD Power Sequence Control 1        */
+{VIACR, CR8D, 0xFF, 0x00},	/* LCD Power Sequence Control 2        */
+{VIACR, CR8E, 0xFF, 0x7B},	/* LCD Power Sequence Control 3        */
+{VIACR, CR8F, 0xFF, 0x03},	/* LCD Power Sequence Control 4        */
+{VIACR, CR90, 0xFF, 0x30},	/* LCD Power Sequence Control 5        */
+{VIACR, CR91, 0xFF, 0xA0},	/* 24/12 bit LVDS Data off             */
+{VIACR, CR96, 0xFF, 0x00},
+{VIACR, CR97, 0xFF, 0x00},
+{VIACR, CR99, 0xFF, 0x00},
+{VIACR, CR9B, 0xFF, 0x00}
+};
+
+/* Video Mode Table for VT3314 chipset*/
+/* Common Setting for Video Mode */
+struct io_reg CN700_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
+{VIASR, SR15, 0x02, 0x02},
+{VIASR, SR16, 0xBF, 0x08},
+{VIASR, SR17, 0xFF, 0x1F},
+{VIASR, SR18, 0xFF, 0x4E},
+{VIASR, SR1A, 0xFB, 0x82},
+{VIASR, SR1B, 0xFF, 0xF0},
+{VIASR, SR1F, 0xFF, 0x00},
+{VIASR, SR1E, 0xFF, 0x01},
+{VIASR, SR22, 0xFF, 0x1F},
+{VIASR, SR2A, 0x0F, 0x00},
+{VIASR, SR2E, 0xFF, 0xFF},
+{VIASR, SR3F, 0xFF, 0xFF},
+{VIASR, SR40, 0xF7, 0x00},
+{VIASR, CR30, 0xFF, 0x04},
+{VIACR, CR32, 0xFF, 0x00},
+{VIACR, CR33, 0x7F, 0x00},
+{VIACR, CR35, 0xFF, 0x00},
+{VIACR, CR36, 0xFF, 0x31},
+{VIACR, CR41, 0xFF, 0x80},
+{VIACR, CR42, 0xFF, 0x00},
+{VIACR, CR55, 0x80, 0x00},
+{VIACR, CR5D, 0x80, 0x00},	/*Horizontal Retrace Start bit[11] should be 0*/
+{VIACR, CR68, 0xFF, 0x67},	/* Default FIFO For IGA2 */
+{VIACR, CR69, 0xFF, 0x00},
+{VIACR, CR6A, 0xFD, 0x40},
+{VIACR, CR6B, 0xFF, 0x00},
+{VIACR, CR77, 0xFF, 0x00},	/* LCD scaling Factor */
+{VIACR, CR78, 0xFF, 0x00},	/* LCD scaling Factor */
+{VIACR, CR79, 0xFF, 0x00},	/* LCD scaling Factor */
+{VIACR, CR9F, 0x03, 0x00},	/* LCD scaling Factor */
+{VIACR, CR88, 0xFF, 0x40},	/* LCD Panel Type */
+{VIACR, CR89, 0xFF, 0x00},	/* LCD Timing Control 0 */
+{VIACR, CR8A, 0xFF, 0x88},	/* LCD Timing Control 1 */
+{VIACR, CR8B, 0xFF, 0x5D},	/* LCD Power Sequence Control 0 */
+{VIACR, CR8C, 0xFF, 0x2B},	/* LCD Power Sequence Control 1 */
+{VIACR, CR8D, 0xFF, 0x6F},	/* LCD Power Sequence Control 2 */
+{VIACR, CR8E, 0xFF, 0x2B},	/* LCD Power Sequence Control 3 */
+{VIACR, CR8F, 0xFF, 0x01},	/* LCD Power Sequence Control 4 */
+{VIACR, CR90, 0xFF, 0x01},	/* LCD Power Sequence Control 5 */
+{VIACR, CR91, 0xFF, 0xA0},	/* 24/12 bit LVDS Data off */
+{VIACR, CR96, 0xFF, 0x00},
+{VIACR, CR97, 0xFF, 0x00},
+{VIACR, CR99, 0xFF, 0x00},
+{VIACR, CR9B, 0xFF, 0x00},
+{VIACR, CR9D, 0xFF, 0x80},
+{VIACR, CR9E, 0xFF, 0x80}
+};
+
+struct io_reg KM400_ModeXregs[] = {
+	{VIASR, SR10, 0xFF, 0x01},	/* Unlock Register                 */
+	{VIASR, SR16, 0xFF, 0x08},	/* Display FIFO threshold Control  */
+	{VIASR, SR17, 0xFF, 0x1F},	/* Display FIFO Control            */
+	{VIASR, SR18, 0xFF, 0x4E},	/* GFX PREQ threshold              */
+	{VIASR, SR1A, 0xFF, 0x0a},	/* GFX PREQ threshold              */
+	{VIASR, SR1F, 0xFF, 0x00},	/* Memory Control 0                */
+	{VIASR, SR1B, 0xFF, 0xF0},	/* Power Management Control 0      */
+	{VIASR, SR1E, 0xFF, 0x01},	/* Power Management Control        */
+	{VIASR, SR20, 0xFF, 0x00},	/* Sequencer Arbiter Control 0     */
+	{VIASR, SR21, 0xFF, 0x00},	/* Sequencer Arbiter Control 1     */
+	{VIASR, SR22, 0xFF, 0x1F},	/* Display Arbiter Control 1       */
+	{VIASR, SR2A, 0xFF, 0x00},	/* Power Management Control 5      */
+	{VIASR, SR2D, 0xFF, 0xFF},	/* Power Management Control 1      */
+	{VIASR, SR2E, 0xFF, 0xFF},	/* Power Management Control 2      */
+	{VIACR, CR33, 0xFF, 0x00},
+	{VIACR, CR55, 0x80, 0x00},
+	{VIACR, CR5D, 0x80, 0x00},
+	{VIACR, CR36, 0xFF, 0x01},	/* Power Mangement 3                  */
+	{VIACR, CR68, 0xFF, 0x67},	/* Default FIFO For IGA2              */
+	{VIACR, CR6A, 0x20, 0x20},	/* Extended FIFO On                   */
+	{VIACR, CR88, 0xFF, 0x40},	/* LCD Panel Type                     */
+	{VIACR, CR89, 0xFF, 0x00},	/* LCD Timing Control 0               */
+	{VIACR, CR8A, 0xFF, 0x88},	/* LCD Timing Control 1               */
+	{VIACR, CR8B, 0xFF, 0x2D},	/* LCD Power Sequence Control 0       */
+	{VIACR, CR8C, 0xFF, 0x2D},	/* LCD Power Sequence Control 1       */
+	{VIACR, CR8D, 0xFF, 0xC8},	/* LCD Power Sequence Control 2       */
+	{VIACR, CR8E, 0xFF, 0x36},	/* LCD Power Sequence Control 3       */
+	{VIACR, CR8F, 0xFF, 0x00},	/* LCD Power Sequence Control 4       */
+	{VIACR, CR90, 0xFF, 0x10},	/* LCD Power Sequence Control 5       */
+	{VIACR, CR91, 0xFF, 0xA0},	/* 24/12 bit LVDS Data off            */
+	{VIACR, CR96, 0xFF, 0x03},	/* DVP0        ; DVP0 Clock Skew */
+	{VIACR, CR97, 0xFF, 0x03},	/* DFP high    ; DFPH Clock Skew */
+	{VIACR, CR99, 0xFF, 0x03},	/* DFP low           ; DFPL Clock Skew*/
+	{VIACR, CR9B, 0xFF, 0x07}	/* DVI on DVP1       ; DVP1 Clock Skew*/
+};
+
+/* For VT3324: Common Setting for Video Mode */
+struct io_reg CX700_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
+{VIASR, SR15, 0x02, 0x02},
+{VIASR, SR16, 0xBF, 0x08},
+{VIASR, SR17, 0xFF, 0x1F},
+{VIASR, SR18, 0xFF, 0x4E},
+{VIASR, SR1A, 0xFB, 0x08},
+{VIASR, SR1B, 0xFF, 0xF0},
+{VIASR, SR1E, 0xFF, 0x01},
+{VIASR, SR2A, 0xFF, 0x00},
+{VIASR, SR2D, 0xC0, 0xC0},	/* delayed E3_ECK */
+{VIACR, CR32, 0xFF, 0x00},
+{VIACR, CR33, 0xFF, 0x00},
+{VIACR, CR35, 0xFF, 0x00},
+{VIACR, CR36, 0x08, 0x00},
+{VIACR, CR47, 0xC8, 0x00},	/* Clear VCK Plus. */
+{VIACR, CR69, 0xFF, 0x00},
+{VIACR, CR6A, 0xFF, 0x40},
+{VIACR, CR6B, 0xFF, 0x00},
+{VIACR, CR88, 0xFF, 0x40},	/* LCD Panel Type                      */
+{VIACR, CR89, 0xFF, 0x00},	/* LCD Timing Control 0                */
+{VIACR, CR8A, 0xFF, 0x88},	/* LCD Timing Control 1                */
+{VIACR, CRD4, 0xFF, 0x81},	/* Second power sequence control       */
+{VIACR, CR8B, 0xFF, 0x5D},	/* LCD Power Sequence Control 0        */
+{VIACR, CR8C, 0xFF, 0x2B},	/* LCD Power Sequence Control 1        */
+{VIACR, CR8D, 0xFF, 0x6F},	/* LCD Power Sequence Control 2        */
+{VIACR, CR8E, 0xFF, 0x2B},	/* LCD Power Sequence Control 3        */
+{VIACR, CR8F, 0xFF, 0x01},	/* LCD Power Sequence Control 4        */
+{VIACR, CR90, 0xFF, 0x01},	/* LCD Power Sequence Control 5        */
+{VIACR, CR91, 0xFF, 0x80},	/* 24/12 bit LVDS Data off             */
+{VIACR, CR96, 0xFF, 0x00},
+{VIACR, CR97, 0xFF, 0x00},
+{VIACR, CR99, 0xFF, 0x00},
+{VIACR, CR9B, 0xFF, 0x00}
+};
+
+struct io_reg VX855_ModeXregs[] = {
+{VIASR, SR10, 0xFF, 0x01},
+{VIASR, SR15, 0x02, 0x02},
+{VIASR, SR16, 0xBF, 0x08},
+{VIASR, SR17, 0xFF, 0x1F},
+{VIASR, SR18, 0xFF, 0x4E},
+{VIASR, SR1A, 0xFB, 0x08},
+{VIASR, SR1B, 0xFF, 0xF0},
+{VIASR, SR1E, 0x07, 0x01},
+{VIASR, SR2A, 0xF0, 0x00},
+{VIASR, SR58, 0xFF, 0x00},
+{VIASR, SR59, 0xFF, 0x00},
+{VIASR, SR2D, 0xC0, 0xC0},	/* delayed E3_ECK */
+{VIACR, CR32, 0xFF, 0x00},
+{VIACR, CR33, 0x7F, 0x00},
+{VIACR, CR35, 0xFF, 0x00},
+{VIACR, CR36, 0x08, 0x00},
+{VIACR, CR69, 0xFF, 0x00},
+{VIACR, CR6A, 0xFD, 0x60},
+{VIACR, CR6B, 0xFF, 0x00},
+{VIACR, CR88, 0xFF, 0x40},          /* LCD Panel Type                      */
+{VIACR, CR89, 0xFF, 0x00},          /* LCD Timing Control 0                */
+{VIACR, CR8A, 0xFF, 0x88},          /* LCD Timing Control 1                */
+{VIACR, CRD4, 0xFF, 0x81},          /* Second power sequence control       */
+{VIACR, CR91, 0xFF, 0x80},          /* 24/12 bit LVDS Data off             */
+{VIACR, CR96, 0xFF, 0x00},
+{VIACR, CR97, 0xFF, 0x00},
+{VIACR, CR99, 0xFF, 0x00},
+{VIACR, CR9B, 0xFF, 0x00},
+{VIACR, CRD2, 0xFF, 0xFF}           /* TMDS/LVDS control register.         */
+};
+
+/* Video Mode Table */
+/* Common Setting for Video Mode */
+struct io_reg CLE266_ModeXregs[] = { {VIASR, SR1E, 0xF0, 0x00},
+{VIASR, SR2A, 0x0F, 0x00},
+{VIASR, SR15, 0x02, 0x02},
+{VIASR, SR16, 0xBF, 0x08},
+{VIASR, SR17, 0xFF, 0x1F},
+{VIASR, SR18, 0xFF, 0x4E},
+{VIASR, SR1A, 0xFB, 0x08},
+
+{VIACR, CR32, 0xFF, 0x00},
+{VIACR, CR35, 0xFF, 0x00},
+{VIACR, CR36, 0x08, 0x00},
+{VIACR, CR6A, 0xFF, 0x80},
+{VIACR, CR6A, 0xFF, 0xC0},
+
+{VIACR, CR55, 0x80, 0x00},
+{VIACR, CR5D, 0x80, 0x00},
+
+{VIAGR, GR20, 0xFF, 0x00},
+{VIAGR, GR21, 0xFF, 0x00},
+{VIAGR, GR22, 0xFF, 0x00},
+
+};
+
+/* Mode:1024X768 */
+struct io_reg PM1024x768[] = { {VIASR, 0x16, 0xBF, 0x0C},
+{VIASR, 0x18, 0xFF, 0x4C}
+};
+
+struct patch_table res_patch_table[] = {
+	{ARRAY_SIZE(PM1024x768), PM1024x768}
+};
+
+/* struct VPITTable {
+	unsigned char  Misc;
+	unsigned char  SR[StdSR];
+	unsigned char  CR[StdCR];
+	unsigned char  GR[StdGR];
+	unsigned char  AR[StdAR];
+ };*/
+
+struct VPITTable VPIT = {
+	/* Msic */
+	0xC7,
+	/* Sequencer */
+	{0x01, 0x0F, 0x00, 0x0E},
+	/* Graphic Controller */
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x0F, 0xFF},
+	/* Attribute Controller */
+	{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+	 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+	 0x01, 0x00, 0x0F, 0x00}
+};
+
+/********************/
+/* Mode Table       */
+/********************/
+
+static const struct fb_videomode viafb_modes[] = {
+	{NULL, 60, 480, 640, 40285, 72, 24, 19, 1, 48, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2, 0, 0, 0},
+	{NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3, 0, 0, 0},
+	{NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3, 0, 0, 0},
+	{NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 120, 640, 480, 19081, 104, 40, 31, 1, 64, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 720, 480, 37426, 88, 16, 13, 1, 72, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 720, 576, 30611, 96, 24, 17, 1, 72, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 100, 800, 600, 14667, 136, 48, 32, 1, 88, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 120, 800, 600, 11911, 144, 56, 39, 1, 88, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 800, 480, 33602, 96, 24, 10, 3, 72, 7, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 848, 480, 31565, 104, 24, 12, 3, 80, 5, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 856, 480, 31517, 104, 16, 13, 1, 88, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1024, 512, 24218, 136, 32, 15, 1, 104, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1024, 600, 20423, 144, 40, 18, 1, 104, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6, 0, 0, 0},
+	{NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1280, 768, 12478, 200, 64, 23, 1, 136, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 50, 1280, 768, 15342, 184, 56, 19, 1, 128, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 960, 600, 21964, 128, 32, 15, 3, 96, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1000, 600, 20803, 144, 40, 18, 1, 104, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1024, 576, 21278, 144, 40, 17, 1, 104, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1088, 612, 18825, 152, 48, 16, 3, 104, 5, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1152, 720, 14974, 168, 56, 19, 3, 112, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1200, 720, 14248, 184, 56, 22, 1, 128, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 49, 1200, 900, 17703, 21, 11, 1, 1, 32, 10, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1280, 600, 16259, 184, 56, 18, 1, 128, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1280, 800, 11938, 200, 72, 22, 3, 128, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1360, 768, 11759, 208, 72, 22, 3, 136, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1368, 768, 11646, 216, 72, 23, 1, 144, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 50, 1368, 768, 14301, 200, 56, 19, 1, 144, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1368, 768, 11646, 216, 72, 23, 1, 144, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1440, 900, 9372, 232, 80, 25, 3, 152, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 1440, 900, 7311, 248, 96, 33, 3, 152, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1440, 1040, 7993, 248, 96, 33, 1, 152, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1600, 900, 8449, 256, 88, 26, 3, 168, 5, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1600, 1024, 7333, 272, 104, 32, 1, 168, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1680, 1050, 6832, 280, 104, 30, 3, 176, 6, 0, 0, 0},
+	{NULL, 75, 1680, 1050, 5339, 296, 120, 40, 3, 176, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1792, 1344, 4883, 328, 128, 46, 1, 200, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1856, 1392, 4581, 352, 96, 43, 1, 224, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 2048, 1536, 3738, 376, 152, 49, 3, 224, 4, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1280, 720, 13484, 216, 112, 20, 5, 40, 5, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 50, 1280, 720, 16538, 176, 48, 17, 1, 128, 3, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1920, 1080, 5776, 328, 128, 32, 3, 200, 5, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1920, 1200, 5164, 336, 136, 36, 3, 200, 6, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 60, 1400, 1050, 8210, 232, 88, 32, 3, 144, 4, FB_SYNC_VERT_HIGH_ACT, 0, 0},
+	{NULL, 75, 1400, 1050, 6398, 248, 104, 42, 3, 144, 4, FB_SYNC_VERT_HIGH_ACT, 0, 0} };
+
+static const struct fb_videomode viafb_rb_modes[] = {
+	{NULL, 60, 1360, 768, 13879, 80, 48, 14, 3, 32, 5, FB_SYNC_HOR_HIGH_ACT, 0, 0},
+	{NULL, 60, 1440, 900, 11249, 80, 48, 17, 3, 32, 6, FB_SYNC_HOR_HIGH_ACT, 0, 0},
+	{NULL, 60, 1400, 1050, 9892, 80, 48, 23, 3, 32, 4, FB_SYNC_HOR_HIGH_ACT, 0, 0},
+	{NULL, 60, 1600, 900, 10226, 80, 48, 18, 3, 32, 5, FB_SYNC_HOR_HIGH_ACT, 0, 0},
+	{NULL, 60, 1680, 1050, 8387, 80, 48, 21, 3, 32, 6, FB_SYNC_HOR_HIGH_ACT, 0, 0},
+	{NULL, 60, 1920, 1080, 7212, 80, 48, 23, 3, 32, 5, FB_SYNC_HOR_HIGH_ACT, 0, 0},
+	{NULL, 60, 1920, 1200, 6488, 80, 48, 26, 3, 32, 6, FB_SYNC_HOR_HIGH_ACT, 0, 0} };
+
+int NUM_TOTAL_CN400_ModeXregs = ARRAY_SIZE(CN400_ModeXregs);
+int NUM_TOTAL_CN700_ModeXregs = ARRAY_SIZE(CN700_ModeXregs);
+int NUM_TOTAL_KM400_ModeXregs = ARRAY_SIZE(KM400_ModeXregs);
+int NUM_TOTAL_CX700_ModeXregs = ARRAY_SIZE(CX700_ModeXregs);
+int NUM_TOTAL_VX855_ModeXregs = ARRAY_SIZE(VX855_ModeXregs);
+int NUM_TOTAL_CLE266_ModeXregs = ARRAY_SIZE(CLE266_ModeXregs);
+int NUM_TOTAL_PATCH_MODE = ARRAY_SIZE(res_patch_table);
+
+
+static const struct fb_videomode *get_best_mode(
+	const struct fb_videomode *modes, int n,
+	int hres, int vres, int refresh)
+{
+	const struct fb_videomode *best = NULL;
+	int i;
+
+	for (i = 0; i < n; i++) {
+		if (modes[i].xres != hres || modes[i].yres != vres)
+			continue;
+
+		if (!best || abs(modes[i].refresh - refresh) <
+			abs(best->refresh - refresh))
+			best = &modes[i];
+	}
+
+	return best;
+}
+
+const struct fb_videomode *viafb_get_best_mode(int hres, int vres, int refresh)
+{
+	return get_best_mode(viafb_modes, ARRAY_SIZE(viafb_modes),
+		hres, vres, refresh);
+}
+
+const struct fb_videomode *viafb_get_best_rb_mode(int hres, int vres,
+	int refresh)
+{
+	return get_best_mode(viafb_rb_modes, ARRAY_SIZE(viafb_rb_modes),
+		hres, vres, refresh);
+}
diff --git a/drivers/video/fbdev/via/viamode.h b/drivers/video/fbdev/via/viamode.h
new file mode 100644
index 0000000000..e382436458
--- /dev/null
+++ b/drivers/video/fbdev/via/viamode.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef __VIAMODE_H__
+#define __VIAMODE_H__
+
+#include "global.h"
+
+struct VPITTable {
+	unsigned char Misc;
+	unsigned char SR[StdSR];
+	unsigned char GR[StdGR];
+	unsigned char AR[StdAR];
+};
+
+struct patch_table {
+	int table_length;
+	struct io_reg *io_reg_table;
+};
+
+extern int NUM_TOTAL_CN400_ModeXregs;
+extern int NUM_TOTAL_CN700_ModeXregs;
+extern int NUM_TOTAL_KM400_ModeXregs;
+extern int NUM_TOTAL_CX700_ModeXregs;
+extern int NUM_TOTAL_VX855_ModeXregs;
+extern int NUM_TOTAL_CLE266_ModeXregs;
+extern int NUM_TOTAL_PATCH_MODE;
+
+extern struct io_reg CN400_ModeXregs[];
+extern struct io_reg CN700_ModeXregs[];
+extern struct io_reg KM400_ModeXregs[];
+extern struct io_reg CX700_ModeXregs[];
+extern struct io_reg VX800_ModeXregs[];
+extern struct io_reg VX855_ModeXregs[];
+extern struct io_reg CLE266_ModeXregs[];
+extern struct io_reg PM1024x768[];
+extern struct patch_table res_patch_table[];
+extern struct VPITTable VPIT;
+
+const struct fb_videomode *viafb_get_best_mode(int hres, int vres,
+	int refresh);
+const struct fb_videomode *viafb_get_best_rb_mode(int hres, int vres,
+	int refresh);
+
+#endif /* __VIAMODE_H__ */
diff --git a/drivers/video/fbdev/via/vt1636.c b/drivers/video/fbdev/via/vt1636.c
new file mode 100644
index 0000000000..8d8cfdb056
--- /dev/null
+++ b/drivers/video/fbdev/via/vt1636.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+#include "global.h"
+
+static const struct IODATA common_init_data[] = {
+/*  Index, Mask, Value */
+	/* Set panel power sequence timing */
+	{0x10, 0xC0, 0x00},
+	/* T1: VDD on - Data on. Each increment is 1 ms. (50ms = 031h) */
+	{0x0B, 0xFF, 0x40},
+	/* T2: Data on - Backlight on. Each increment is 2 ms. (210ms = 068h) */
+	{0x0C, 0xFF, 0x31},
+	/* T3: Backlight off -Data off. Each increment is 2 ms. (210ms = 068h)*/
+	{0x0D, 0xFF, 0x31},
+	/* T4: Data off - VDD off. Each increment is 1 ms. (50ms = 031h) */
+	{0x0E, 0xFF, 0x68},
+	/* T5: VDD off - VDD on. Each increment is 100 ms. (500ms = 04h) */
+	{0x0F, 0xFF, 0x68},
+	/* LVDS output power up */
+	{0x09, 0xA0, 0xA0},
+	/* turn on back light */
+	{0x10, 0x33, 0x13}
+};
+
+/* Index, Mask, Value */
+static const struct IODATA dual_channel_enable_data = {0x08, 0xF0, 0xE0};
+static const struct IODATA single_channel_enable_data = {0x08, 0xF0, 0x00};
+static const struct IODATA dithering_enable_data = {0x0A, 0x70, 0x50};
+static const struct IODATA dithering_disable_data = {0x0A, 0x70, 0x00};
+static const struct IODATA vdd_on_data = {0x10, 0x20, 0x20};
+static const struct IODATA vdd_off_data = {0x10, 0x20, 0x00};
+
+u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
+	u8 index)
+{
+	u8 data;
+
+	viafb_i2c_readbyte(plvds_chip_info->i2c_port,
+			   plvds_chip_info->lvds_chip_slave_addr, index, &data);
+	return data;
+}
+
+void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
+			      *plvds_setting_info, struct lvds_chip_information
+			      *plvds_chip_info, struct IODATA io_data)
+{
+	int index, data;
+
+	index = io_data.Index;
+	data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
+		index);
+	data = (data & (~io_data.Mask)) | io_data.Data;
+
+	viafb_i2c_writebyte(plvds_chip_info->i2c_port,
+			    plvds_chip_info->lvds_chip_slave_addr, index, data);
+}
+
+void viafb_init_lvds_vt1636(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
+{
+	int reg_num, i;
+
+	/* Common settings: */
+	reg_num = ARRAY_SIZE(common_init_data);
+	for (i = 0; i < reg_num; i++)
+		viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+			plvds_chip_info, common_init_data[i]);
+
+	/* Input Data Mode Select */
+	if (plvds_setting_info->device_lcd_dualedge)
+		viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+			plvds_chip_info, dual_channel_enable_data);
+	else
+		viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+			plvds_chip_info, single_channel_enable_data);
+
+	if (plvds_setting_info->LCDDithering)
+		viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+			plvds_chip_info, dithering_enable_data);
+	else
+		viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+			plvds_chip_info, dithering_disable_data);
+}
+
+void viafb_enable_lvds_vt1636(struct lvds_setting_information
+			*plvds_setting_info,
+			struct lvds_chip_information *plvds_chip_info)
+{
+	viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
+		vdd_on_data);
+}
+
+void viafb_disable_lvds_vt1636(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info)
+{
+	viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
+		vdd_off_data);
+}
+
+bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
+{
+	u8 Buffer[2];
+
+	DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
+
+	/* Sense VT1636 LVDS Transmiter */
+	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
+		VT1636_LVDS_I2C_ADDR;
+
+	/* Check vendor ID first: */
+	if (viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR,
+					0x00, &Buffer[0]))
+		return false;
+	viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x01, &Buffer[1]);
+
+	if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
+		return false;
+
+	/* Check Chip ID: */
+	viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x02, &Buffer[0]);
+	viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x03, &Buffer[1]);
+	if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
+		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+			VT1636_LVDS;
+		return true;
+	}
+
+	return false;
+}
+
+static int get_clk_range_index(u32 Clk)
+{
+	if (Clk < DPA_CLK_30M)
+		return DPA_CLK_RANGE_30M;
+	else if (Clk < DPA_CLK_50M)
+		return DPA_CLK_RANGE_30_50M;
+	else if (Clk < DPA_CLK_70M)
+		return DPA_CLK_RANGE_50_70M;
+	else if (Clk < DPA_CLK_100M)
+		return DPA_CLK_RANGE_70_100M;
+	else if (Clk < DPA_CLK_150M)
+		return DPA_CLK_RANGE_100_150M;
+	else
+		return DPA_CLK_RANGE_150M;
+}
+
+static void set_dpa_vt1636(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
+		    struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
+{
+	struct IODATA io_data;
+
+	io_data.Index = 0x09;
+	io_data.Mask = 0x1F;
+	io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
+	viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+		plvds_chip_info, io_data);
+
+	io_data.Index = 0x08;
+	io_data.Mask = 0x0F;
+	io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
+	viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
+		io_data);
+}
+
+void viafb_vt1636_patch_skew_on_vt3324(
+	struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info)
+{
+	struct VT1636_DPA_SETTING dpa = {0x00, 0x00}, dpa_16x12 = {0x0B, 0x03},
+		*pdpa;
+	int index;
+
+	DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
+
+	/* Graphics DPA settings: */
+	index = get_clk_range_index(plvds_setting_info->vclk);
+	viafb_set_dpa_gfx(plvds_chip_info->output_interface,
+		    &GFX_DPA_SETTING_TBL_VT3324[index]);
+
+	/* LVDS Transmitter DPA settings: */
+	if (plvds_setting_info->lcd_panel_hres == 1600 &&
+		plvds_setting_info->lcd_panel_vres == 1200)
+		pdpa = &dpa_16x12;
+	else
+		pdpa = &dpa;
+
+	set_dpa_vt1636(plvds_setting_info, plvds_chip_info, pdpa);
+}
+
+void viafb_vt1636_patch_skew_on_vt3327(
+	struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info)
+{
+	struct VT1636_DPA_SETTING dpa = {0x00, 0x00};
+	int index;
+
+	DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
+
+	/* Graphics DPA settings: */
+	index = get_clk_range_index(plvds_setting_info->vclk);
+	viafb_set_dpa_gfx(plvds_chip_info->output_interface,
+		    &GFX_DPA_SETTING_TBL_VT3327[index]);
+
+	/* LVDS Transmitter DPA settings: */
+	set_dpa_vt1636(plvds_setting_info, plvds_chip_info, &dpa);
+}
+
+void viafb_vt1636_patch_skew_on_vt3364(
+	struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info)
+{
+	int index;
+
+	DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
+
+	/* Graphics DPA settings: */
+	index = get_clk_range_index(plvds_setting_info->vclk);
+	viafb_set_dpa_gfx(plvds_chip_info->output_interface,
+		    &GFX_DPA_SETTING_TBL_VT3364[index]);
+}
diff --git a/drivers/video/fbdev/via/vt1636.h b/drivers/video/fbdev/via/vt1636.h
new file mode 100644
index 0000000000..17ac31d7da
--- /dev/null
+++ b/drivers/video/fbdev/via/vt1636.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ */
+
+#ifndef _VT1636_H_
+#define _VT1636_H_
+#include "chip.h"
+bool viafb_lvds_identify_vt1636(u8 i2c_adapter);
+void viafb_init_lvds_vt1636(struct lvds_setting_information
+	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info);
+void viafb_enable_lvds_vt1636(struct lvds_setting_information
+			*plvds_setting_info,
+			struct lvds_chip_information *plvds_chip_info);
+void viafb_disable_lvds_vt1636(struct lvds_setting_information
+			 *plvds_setting_info,
+			 struct lvds_chip_information *plvds_chip_info);
+void viafb_vt1636_patch_skew_on_vt3324(
+	struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info);
+void viafb_vt1636_patch_skew_on_vt3327(
+	struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info);
+void viafb_vt1636_patch_skew_on_vt3364(
+	struct lvds_setting_information *plvds_setting_info,
+	struct lvds_chip_information *plvds_chip_info);
+
+#endif