From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 12:05:51 +0200
Subject: Adding upstream version 5.10.209.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/gpu/drm/exynos/exynos7_drm_decon.c | 855 +++++++++++++++++++++++++++++
 1 file changed, 855 insertions(+)
 create mode 100644 drivers/gpu/drm/exynos/exynos7_drm_decon.c

(limited to 'drivers/gpu/drm/exynos/exynos7_drm_decon.c')

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
new file mode 100644
index 000000000..1c04c232d
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -0,0 +1,855 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* drivers/gpu/drm/exynos/exynos7_drm_decon.c
+ *
+ * Copyright (C) 2014 Samsung Electronics Co.Ltd
+ * Authors:
+ *	Akshu Agarwal <akshua@gmail.com>
+ *	Ajay Kumar <ajaykumar.rs@samsung.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <video/of_display_timing.h>
+#include <video/of_videomode.h>
+
+#include <drm/drm_fourcc.h>
+#include <drm/drm_vblank.h>
+#include <drm/exynos_drm.h>
+
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_plane.h"
+#include "regs-decon7.h"
+
+/*
+ * DECON stands for Display and Enhancement controller.
+ */
+
+#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
+
+#define WINDOWS_NR	2
+
+struct decon_context {
+	struct device			*dev;
+	struct drm_device		*drm_dev;
+	void				*dma_priv;
+	struct exynos_drm_crtc		*crtc;
+	struct exynos_drm_plane		planes[WINDOWS_NR];
+	struct exynos_drm_plane_config	configs[WINDOWS_NR];
+	struct clk			*pclk;
+	struct clk			*aclk;
+	struct clk			*eclk;
+	struct clk			*vclk;
+	void __iomem			*regs;
+	unsigned long			irq_flags;
+	bool				i80_if;
+	bool				suspended;
+	wait_queue_head_t		wait_vsync_queue;
+	atomic_t			wait_vsync_event;
+
+	struct drm_encoder *encoder;
+};
+
+static const struct of_device_id decon_driver_dt_match[] = {
+	{.compatible = "samsung,exynos7-decon"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
+
+static const uint32_t decon_formats[] = {
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_RGBX8888,
+	DRM_FORMAT_BGRX8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_RGBA8888,
+	DRM_FORMAT_BGRA8888,
+};
+
+static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
+	DRM_PLANE_TYPE_PRIMARY,
+	DRM_PLANE_TYPE_CURSOR,
+};
+
+static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+
+	if (ctx->suspended)
+		return;
+
+	atomic_set(&ctx->wait_vsync_event, 1);
+
+	/*
+	 * wait for DECON to signal VSYNC interrupt or return after
+	 * timeout which is set to 50ms (refresh rate of 20).
+	 */
+	if (!wait_event_timeout(ctx->wait_vsync_queue,
+				!atomic_read(&ctx->wait_vsync_event),
+				HZ/20))
+		DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
+}
+
+static void decon_clear_channels(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	unsigned int win, ch_enabled = 0;
+
+	/* Check if any channel is enabled. */
+	for (win = 0; win < WINDOWS_NR; win++) {
+		u32 val = readl(ctx->regs + WINCON(win));
+
+		if (val & WINCONx_ENWIN) {
+			val &= ~WINCONx_ENWIN;
+			writel(val, ctx->regs + WINCON(win));
+			ch_enabled = 1;
+		}
+	}
+
+	/* Wait for vsync, as disable channel takes effect at next vsync */
+	if (ch_enabled)
+		decon_wait_for_vblank(ctx->crtc);
+}
+
+static int decon_ctx_initialize(struct decon_context *ctx,
+			struct drm_device *drm_dev)
+{
+	ctx->drm_dev = drm_dev;
+
+	decon_clear_channels(ctx->crtc);
+
+	return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv);
+}
+
+static void decon_ctx_remove(struct decon_context *ctx)
+{
+	/* detach this sub driver from iommu mapping if supported. */
+	exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);
+}
+
+static u32 decon_calc_clkdiv(struct decon_context *ctx,
+		const struct drm_display_mode *mode)
+{
+	unsigned long ideal_clk = mode->clock;
+	u32 clkdiv;
+
+	/* Find the clock divider value that gets us closest to ideal_clk */
+	clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
+
+	return (clkdiv < 0x100) ? clkdiv : 0xff;
+}
+
+static void decon_commit(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
+	u32 val, clkdiv;
+
+	if (ctx->suspended)
+		return;
+
+	/* nothing to do if we haven't set the mode yet */
+	if (mode->htotal == 0 || mode->vtotal == 0)
+		return;
+
+	if (!ctx->i80_if) {
+		int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
+	      /* setup vertical timing values. */
+		vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
+		vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
+		vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
+
+		val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
+		writel(val, ctx->regs + VIDTCON0);
+
+		val = VIDTCON1_VSPW(vsync_len - 1);
+		writel(val, ctx->regs + VIDTCON1);
+
+		/* setup horizontal timing values.  */
+		hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
+		hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
+		hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
+
+		/* setup horizontal timing values.  */
+		val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
+		writel(val, ctx->regs + VIDTCON2);
+
+		val = VIDTCON3_HSPW(hsync_len - 1);
+		writel(val, ctx->regs + VIDTCON3);
+	}
+
+	/* setup horizontal and vertical display size. */
+	val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
+	       VIDTCON4_HOZVAL(mode->hdisplay - 1);
+	writel(val, ctx->regs + VIDTCON4);
+
+	writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
+
+	/*
+	 * fields of register with prefix '_F' would be updated
+	 * at vsync(same as dma start)
+	 */
+	val = VIDCON0_ENVID | VIDCON0_ENVID_F;
+	writel(val, ctx->regs + VIDCON0);
+
+	clkdiv = decon_calc_clkdiv(ctx, mode);
+	if (clkdiv > 1) {
+		val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
+		writel(val, ctx->regs + VCLKCON1);
+		writel(val, ctx->regs + VCLKCON2);
+	}
+
+	val = readl(ctx->regs + DECON_UPDATE);
+	val |= DECON_UPDATE_STANDALONE_F;
+	writel(val, ctx->regs + DECON_UPDATE);
+}
+
+static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	u32 val;
+
+	if (ctx->suspended)
+		return -EPERM;
+
+	if (!test_and_set_bit(0, &ctx->irq_flags)) {
+		val = readl(ctx->regs + VIDINTCON0);
+
+		val |= VIDINTCON0_INT_ENABLE;
+
+		if (!ctx->i80_if) {
+			val |= VIDINTCON0_INT_FRAME;
+			val &= ~VIDINTCON0_FRAMESEL0_MASK;
+			val |= VIDINTCON0_FRAMESEL0_VSYNC;
+		}
+
+		writel(val, ctx->regs + VIDINTCON0);
+	}
+
+	return 0;
+}
+
+static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	u32 val;
+
+	if (ctx->suspended)
+		return;
+
+	if (test_and_clear_bit(0, &ctx->irq_flags)) {
+		val = readl(ctx->regs + VIDINTCON0);
+
+		val &= ~VIDINTCON0_INT_ENABLE;
+		if (!ctx->i80_if)
+			val &= ~VIDINTCON0_INT_FRAME;
+
+		writel(val, ctx->regs + VIDINTCON0);
+	}
+}
+
+static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
+				 struct drm_framebuffer *fb)
+{
+	unsigned long val;
+	int padding;
+
+	val = readl(ctx->regs + WINCON(win));
+	val &= ~WINCONx_BPPMODE_MASK;
+
+	switch (fb->format->format) {
+	case DRM_FORMAT_RGB565:
+		val |= WINCONx_BPPMODE_16BPP_565;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_XRGB8888:
+		val |= WINCONx_BPPMODE_24BPP_xRGB;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		val |= WINCONx_BPPMODE_24BPP_xBGR;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_RGBX8888:
+		val |= WINCONx_BPPMODE_24BPP_RGBx;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_BGRX8888:
+		val |= WINCONx_BPPMODE_24BPP_BGRx;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_ARGB8888:
+		val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
+			WINCONx_ALPHA_SEL;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_ABGR8888:
+		val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
+			WINCONx_ALPHA_SEL;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_RGBA8888:
+		val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
+			WINCONx_ALPHA_SEL;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	case DRM_FORMAT_BGRA8888:
+	default:
+		val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
+			WINCONx_ALPHA_SEL;
+		val |= WINCONx_BURSTLEN_16WORD;
+		break;
+	}
+
+	DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);
+
+	/*
+	 * In case of exynos, setting dma-burst to 16Word causes permanent
+	 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
+	 * switching which is based on plane size is not recommended as
+	 * plane size varies a lot towards the end of the screen and rapid
+	 * movement causes unstable DMA which results into iommu crash/tear.
+	 */
+
+	padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width;
+	if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
+		val &= ~WINCONx_BURSTLEN_MASK;
+		val |= WINCONx_BURSTLEN_8WORD;
+	}
+
+	writel(val, ctx->regs + WINCON(win));
+}
+
+static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
+{
+	unsigned int keycon0 = 0, keycon1 = 0;
+
+	keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
+			WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
+
+	keycon1 = WxKEYCON1_COLVAL(0xffffffff);
+
+	writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
+	writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
+}
+
+/**
+ * shadow_protect_win() - disable updating values from shadow registers at vsync
+ *
+ * @win: window to protect registers for
+ * @protect: 1 to protect (disable updates)
+ */
+static void decon_shadow_protect_win(struct decon_context *ctx,
+				     unsigned int win, bool protect)
+{
+	u32 bits, val;
+
+	bits = SHADOWCON_WINx_PROTECT(win);
+
+	val = readl(ctx->regs + SHADOWCON);
+	if (protect)
+		val |= bits;
+	else
+		val &= ~bits;
+	writel(val, ctx->regs + SHADOWCON);
+}
+
+static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	int i;
+
+	if (ctx->suspended)
+		return;
+
+	for (i = 0; i < WINDOWS_NR; i++)
+		decon_shadow_protect_win(ctx, i, true);
+}
+
+static void decon_update_plane(struct exynos_drm_crtc *crtc,
+			       struct exynos_drm_plane *plane)
+{
+	struct exynos_drm_plane_state *state =
+				to_exynos_plane_state(plane->base.state);
+	struct decon_context *ctx = crtc->ctx;
+	struct drm_framebuffer *fb = state->base.fb;
+	int padding;
+	unsigned long val, alpha;
+	unsigned int last_x;
+	unsigned int last_y;
+	unsigned int win = plane->index;
+	unsigned int cpp = fb->format->cpp[0];
+	unsigned int pitch = fb->pitches[0];
+
+	if (ctx->suspended)
+		return;
+
+	/*
+	 * SHADOWCON/PRTCON register is used for enabling timing.
+	 *
+	 * for example, once only width value of a register is set,
+	 * if the dma is started then decon hardware could malfunction so
+	 * with protect window setting, the register fields with prefix '_F'
+	 * wouldn't be updated at vsync also but updated once unprotect window
+	 * is set.
+	 */
+
+	/* buffer start address */
+	val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
+	writel(val, ctx->regs + VIDW_BUF_START(win));
+
+	padding = (pitch / cpp) - fb->width;
+
+	/* buffer size */
+	writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
+	writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));
+
+	/* offset from the start of the buffer to read */
+	writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));
+	writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));
+
+	DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",
+			(unsigned long)val);
+	DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
+			state->crtc.w, state->crtc.h);
+
+	val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
+		VIDOSDxA_TOPLEFT_Y(state->crtc.y);
+	writel(val, ctx->regs + VIDOSD_A(win));
+
+	last_x = state->crtc.x + state->crtc.w;
+	if (last_x)
+		last_x--;
+	last_y = state->crtc.y + state->crtc.h;
+	if (last_y)
+		last_y--;
+
+	val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
+
+	writel(val, ctx->regs + VIDOSD_B(win));
+
+	DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
+			state->crtc.x, state->crtc.y, last_x, last_y);
+
+	/* OSD alpha */
+	alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
+			VIDOSDxC_ALPHA0_G_F(0x0) |
+			VIDOSDxC_ALPHA0_B_F(0x0);
+
+	writel(alpha, ctx->regs + VIDOSD_C(win));
+
+	alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
+			VIDOSDxD_ALPHA1_G_F(0xff) |
+			VIDOSDxD_ALPHA1_B_F(0xff);
+
+	writel(alpha, ctx->regs + VIDOSD_D(win));
+
+	decon_win_set_pixfmt(ctx, win, fb);
+
+	/* hardware window 0 doesn't support color key. */
+	if (win != 0)
+		decon_win_set_colkey(ctx, win);
+
+	/* wincon */
+	val = readl(ctx->regs + WINCON(win));
+	val |= WINCONx_TRIPLE_BUF_MODE;
+	val |= WINCONx_ENWIN;
+	writel(val, ctx->regs + WINCON(win));
+
+	/* Enable DMA channel and unprotect windows */
+	decon_shadow_protect_win(ctx, win, false);
+
+	val = readl(ctx->regs + DECON_UPDATE);
+	val |= DECON_UPDATE_STANDALONE_F;
+	writel(val, ctx->regs + DECON_UPDATE);
+}
+
+static void decon_disable_plane(struct exynos_drm_crtc *crtc,
+				struct exynos_drm_plane *plane)
+{
+	struct decon_context *ctx = crtc->ctx;
+	unsigned int win = plane->index;
+	u32 val;
+
+	if (ctx->suspended)
+		return;
+
+	/* protect windows */
+	decon_shadow_protect_win(ctx, win, true);
+
+	/* wincon */
+	val = readl(ctx->regs + WINCON(win));
+	val &= ~WINCONx_ENWIN;
+	writel(val, ctx->regs + WINCON(win));
+
+	val = readl(ctx->regs + DECON_UPDATE);
+	val |= DECON_UPDATE_STANDALONE_F;
+	writel(val, ctx->regs + DECON_UPDATE);
+}
+
+static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	int i;
+
+	if (ctx->suspended)
+		return;
+
+	for (i = 0; i < WINDOWS_NR; i++)
+		decon_shadow_protect_win(ctx, i, false);
+	exynos_crtc_handle_event(crtc);
+}
+
+static void decon_init(struct decon_context *ctx)
+{
+	u32 val;
+
+	writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
+
+	val = VIDOUTCON0_DISP_IF_0_ON;
+	if (!ctx->i80_if)
+		val |= VIDOUTCON0_RGBIF;
+	writel(val, ctx->regs + VIDOUTCON0);
+
+	writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
+
+	if (!ctx->i80_if)
+		writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
+}
+
+static void decon_atomic_enable(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+
+	if (!ctx->suspended)
+		return;
+
+	pm_runtime_get_sync(ctx->dev);
+
+	decon_init(ctx);
+
+	/* if vblank was enabled status, enable it again. */
+	if (test_and_clear_bit(0, &ctx->irq_flags))
+		decon_enable_vblank(ctx->crtc);
+
+	decon_commit(ctx->crtc);
+
+	ctx->suspended = false;
+}
+
+static void decon_atomic_disable(struct exynos_drm_crtc *crtc)
+{
+	struct decon_context *ctx = crtc->ctx;
+	int i;
+
+	if (ctx->suspended)
+		return;
+
+	/*
+	 * We need to make sure that all windows are disabled before we
+	 * suspend that connector. Otherwise we might try to scan from
+	 * a destroyed buffer later.
+	 */
+	for (i = 0; i < WINDOWS_NR; i++)
+		decon_disable_plane(crtc, &ctx->planes[i]);
+
+	pm_runtime_put_sync(ctx->dev);
+
+	ctx->suspended = true;
+}
+
+static const struct exynos_drm_crtc_ops decon_crtc_ops = {
+	.atomic_enable = decon_atomic_enable,
+	.atomic_disable = decon_atomic_disable,
+	.enable_vblank = decon_enable_vblank,
+	.disable_vblank = decon_disable_vblank,
+	.atomic_begin = decon_atomic_begin,
+	.update_plane = decon_update_plane,
+	.disable_plane = decon_disable_plane,
+	.atomic_flush = decon_atomic_flush,
+};
+
+
+static irqreturn_t decon_irq_handler(int irq, void *dev_id)
+{
+	struct decon_context *ctx = (struct decon_context *)dev_id;
+	u32 val, clear_bit;
+
+	val = readl(ctx->regs + VIDINTCON1);
+
+	clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
+	if (val & clear_bit)
+		writel(clear_bit, ctx->regs + VIDINTCON1);
+
+	/* check the crtc is detached already from encoder */
+	if (!ctx->drm_dev)
+		goto out;
+
+	if (!ctx->i80_if) {
+		drm_crtc_handle_vblank(&ctx->crtc->base);
+
+		/* set wait vsync event to zero and wake up queue. */
+		if (atomic_read(&ctx->wait_vsync_event)) {
+			atomic_set(&ctx->wait_vsync_event, 0);
+			wake_up(&ctx->wait_vsync_queue);
+		}
+	}
+out:
+	return IRQ_HANDLED;
+}
+
+static int decon_bind(struct device *dev, struct device *master, void *data)
+{
+	struct decon_context *ctx = dev_get_drvdata(dev);
+	struct drm_device *drm_dev = data;
+	struct exynos_drm_plane *exynos_plane;
+	unsigned int i;
+	int ret;
+
+	ret = decon_ctx_initialize(ctx, drm_dev);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n");
+		return ret;
+	}
+
+	for (i = 0; i < WINDOWS_NR; i++) {
+		ctx->configs[i].pixel_formats = decon_formats;
+		ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);
+		ctx->configs[i].zpos = i;
+		ctx->configs[i].type = decon_win_types[i];
+
+		ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
+					&ctx->configs[i]);
+		if (ret)
+			return ret;
+	}
+
+	exynos_plane = &ctx->planes[DEFAULT_WIN];
+	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
+			EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx);
+	if (IS_ERR(ctx->crtc)) {
+		decon_ctx_remove(ctx);
+		return PTR_ERR(ctx->crtc);
+	}
+
+	if (ctx->encoder)
+		exynos_dpi_bind(drm_dev, ctx->encoder);
+
+	return 0;
+
+}
+
+static void decon_unbind(struct device *dev, struct device *master,
+			void *data)
+{
+	struct decon_context *ctx = dev_get_drvdata(dev);
+
+	decon_atomic_disable(ctx->crtc);
+
+	if (ctx->encoder)
+		exynos_dpi_remove(ctx->encoder);
+
+	decon_ctx_remove(ctx);
+}
+
+static const struct component_ops decon_component_ops = {
+	.bind	= decon_bind,
+	.unbind = decon_unbind,
+};
+
+static int decon_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct decon_context *ctx;
+	struct device_node *i80_if_timings;
+	struct resource *res;
+	int ret;
+
+	if (!dev->of_node)
+		return -ENODEV;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->dev = dev;
+	ctx->suspended = true;
+
+	i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
+	if (i80_if_timings)
+		ctx->i80_if = true;
+	of_node_put(i80_if_timings);
+
+	ctx->regs = of_iomap(dev->of_node, 0);
+	if (!ctx->regs)
+		return -ENOMEM;
+
+	ctx->pclk = devm_clk_get(dev, "pclk_decon0");
+	if (IS_ERR(ctx->pclk)) {
+		dev_err(dev, "failed to get bus clock pclk\n");
+		ret = PTR_ERR(ctx->pclk);
+		goto err_iounmap;
+	}
+
+	ctx->aclk = devm_clk_get(dev, "aclk_decon0");
+	if (IS_ERR(ctx->aclk)) {
+		dev_err(dev, "failed to get bus clock aclk\n");
+		ret = PTR_ERR(ctx->aclk);
+		goto err_iounmap;
+	}
+
+	ctx->eclk = devm_clk_get(dev, "decon0_eclk");
+	if (IS_ERR(ctx->eclk)) {
+		dev_err(dev, "failed to get eclock\n");
+		ret = PTR_ERR(ctx->eclk);
+		goto err_iounmap;
+	}
+
+	ctx->vclk = devm_clk_get(dev, "decon0_vclk");
+	if (IS_ERR(ctx->vclk)) {
+		dev_err(dev, "failed to get vclock\n");
+		ret = PTR_ERR(ctx->vclk);
+		goto err_iounmap;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+					   ctx->i80_if ? "lcd_sys" : "vsync");
+	if (!res) {
+		dev_err(dev, "irq request failed.\n");
+		ret = -ENXIO;
+		goto err_iounmap;
+	}
+
+	ret = devm_request_irq(dev, res->start, decon_irq_handler,
+							0, "drm_decon", ctx);
+	if (ret) {
+		dev_err(dev, "irq request failed.\n");
+		goto err_iounmap;
+	}
+
+	init_waitqueue_head(&ctx->wait_vsync_queue);
+	atomic_set(&ctx->wait_vsync_event, 0);
+
+	platform_set_drvdata(pdev, ctx);
+
+	ctx->encoder = exynos_dpi_probe(dev);
+	if (IS_ERR(ctx->encoder)) {
+		ret = PTR_ERR(ctx->encoder);
+		goto err_iounmap;
+	}
+
+	pm_runtime_enable(dev);
+
+	ret = component_add(dev, &decon_component_ops);
+	if (ret)
+		goto err_disable_pm_runtime;
+
+	return ret;
+
+err_disable_pm_runtime:
+	pm_runtime_disable(dev);
+
+err_iounmap:
+	iounmap(ctx->regs);
+
+	return ret;
+}
+
+static int decon_remove(struct platform_device *pdev)
+{
+	struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
+
+	pm_runtime_disable(&pdev->dev);
+
+	iounmap(ctx->regs);
+
+	component_del(&pdev->dev, &decon_component_ops);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int exynos7_decon_suspend(struct device *dev)
+{
+	struct decon_context *ctx = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(ctx->vclk);
+	clk_disable_unprepare(ctx->eclk);
+	clk_disable_unprepare(ctx->aclk);
+	clk_disable_unprepare(ctx->pclk);
+
+	return 0;
+}
+
+static int exynos7_decon_resume(struct device *dev)
+{
+	struct decon_context *ctx = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(ctx->pclk);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n",
+			      ret);
+		goto err_pclk_enable;
+	}
+
+	ret = clk_prepare_enable(ctx->aclk);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n",
+			      ret);
+		goto err_aclk_enable;
+	}
+
+	ret = clk_prepare_enable(ctx->eclk);
+	if  (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n",
+			      ret);
+		goto err_eclk_enable;
+	}
+
+	ret = clk_prepare_enable(ctx->vclk);
+	if  (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n",
+			      ret);
+		goto err_vclk_enable;
+	}
+
+	return 0;
+
+err_vclk_enable:
+	clk_disable_unprepare(ctx->eclk);
+err_eclk_enable:
+	clk_disable_unprepare(ctx->aclk);
+err_aclk_enable:
+	clk_disable_unprepare(ctx->pclk);
+err_pclk_enable:
+	return ret;
+}
+#endif
+
+static const struct dev_pm_ops exynos7_decon_pm_ops = {
+	SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume,
+			   NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+struct platform_driver decon_driver = {
+	.probe		= decon_probe,
+	.remove		= decon_remove,
+	.driver		= {
+		.name	= "exynos-decon",
+		.pm	= &exynos7_decon_pm_ops,
+		.of_match_table = decon_driver_dt_match,
+	},
+};
-- 
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