Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 521 insertions, 0 deletions

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
new file mode 100644
index 0000000000..dae365ed39
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -0,0 +1,521 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors: Dave Airlie <airlied@redhat.com>
+ */
+
+#include <linux/pci.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_managed.h>
+
+#include "ast_drv.h"
+
+static bool ast_is_vga_enabled(struct drm_device *dev)
+{
+	struct ast_device *ast = to_ast_device(dev);
+	u8 ch;
+
+	ch = ast_io_read8(ast, AST_IO_VGA_ENABLE_PORT);
+
+	return !!(ch & 0x01);
+}
+
+static void ast_enable_vga(struct drm_device *dev)
+{
+	struct ast_device *ast = to_ast_device(dev);
+
+	ast_io_write8(ast, AST_IO_VGA_ENABLE_PORT, 0x01);
+	ast_io_write8(ast, AST_IO_MISC_PORT_WRITE, 0x01);
+}
+
+/*
+ * Run this function as part of the HW device cleanup; not
+ * when the DRM device gets released.
+ */
+static void ast_enable_mmio_release(void *data)
+{
+	struct ast_device *ast = data;
+
+	/* enable standard VGA decode */
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
+}
+
+static int ast_enable_mmio(struct ast_device *ast)
+{
+	struct drm_device *dev = &ast->base;
+
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x06);
+
+	return devm_add_action_or_reset(dev->dev, ast_enable_mmio_release, ast);
+}
+
+static void ast_open_key(struct ast_device *ast)
+{
+	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x80, 0xA8);
+}
+
+static int ast_device_config_init(struct ast_device *ast)
+{
+	struct drm_device *dev = &ast->base;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	struct device_node *np = dev->dev->of_node;
+	uint32_t scu_rev = 0xffffffff;
+	u32 data;
+	u8 jregd0, jregd1;
+
+	/*
+	 * Find configuration mode and read SCU revision
+	 */
+
+	ast->config_mode = ast_use_defaults;
+
+	/* Check if we have device-tree properties */
+	if (np && !of_property_read_u32(np, "aspeed,scu-revision-id", &data)) {
+		/* We do, disable P2A access */
+		ast->config_mode = ast_use_dt;
+		scu_rev = data;
+	} else if (pdev->device == PCI_CHIP_AST2000) { // Not all families have a P2A bridge
+		/*
+		 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge
+		 * is disabled. We force using P2A if VGA only mode bit
+		 * is set D[7]
+		 */
+		jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
+		jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
+		if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) {
+
+			/*
+			 * We have a P2A bridge and it is enabled.
+			 */
+
+			/* Patch AST2500/AST2510 */
+			if ((pdev->revision & 0xf0) == 0x40) {
+				if (!(jregd0 & AST_VRAM_INIT_STATUS_MASK))
+					ast_patch_ahb_2500(ast);
+			}
+
+			/* Double check that it's actually working */
+			data = ast_read32(ast, 0xf004);
+			if ((data != 0xffffffff) && (data != 0x00)) {
+				ast->config_mode = ast_use_p2a;
+
+				/* Read SCU7c (silicon revision register) */
+				ast_write32(ast, 0xf004, 0x1e6e0000);
+				ast_write32(ast, 0xf000, 0x1);
+				scu_rev = ast_read32(ast, 0x1207c);
+			}
+		}
+	}
+
+	switch (ast->config_mode) {
+	case ast_use_defaults:
+		drm_info(dev, "Using default configuration\n");
+		break;
+	case ast_use_dt:
+		drm_info(dev, "Using device-tree for configuration\n");
+		break;
+	case ast_use_p2a:
+		drm_info(dev, "Using P2A bridge for configuration\n");
+		break;
+	}
+
+	/*
+	 * Identify chipset
+	 */
+
+	if (pdev->revision >= 0x50) {
+		ast->chip = AST2600;
+		drm_info(dev, "AST 2600 detected\n");
+	} else if (pdev->revision >= 0x40) {
+		switch (scu_rev & 0x300) {
+		case 0x0100:
+			ast->chip = AST2510;
+			drm_info(dev, "AST 2510 detected\n");
+			break;
+		default:
+			ast->chip = AST2500;
+			drm_info(dev, "AST 2500 detected\n");
+		}
+	} else if (pdev->revision >= 0x30) {
+		switch (scu_rev & 0x300) {
+		case 0x0100:
+			ast->chip = AST1400;
+			drm_info(dev, "AST 1400 detected\n");
+			break;
+		default:
+			ast->chip = AST2400;
+			drm_info(dev, "AST 2400 detected\n");
+		}
+	} else if (pdev->revision >= 0x20) {
+		switch (scu_rev & 0x300) {
+		case 0x0000:
+			ast->chip = AST1300;
+			drm_info(dev, "AST 1300 detected\n");
+			break;
+		default:
+			ast->chip = AST2300;
+			drm_info(dev, "AST 2300 detected\n");
+			break;
+		}
+	} else if (pdev->revision >= 0x10) {
+		switch (scu_rev & 0x0300) {
+		case 0x0200:
+			ast->chip = AST1100;
+			drm_info(dev, "AST 1100 detected\n");
+			break;
+		case 0x0100:
+			ast->chip = AST2200;
+			drm_info(dev, "AST 2200 detected\n");
+			break;
+		case 0x0000:
+			ast->chip = AST2150;
+			drm_info(dev, "AST 2150 detected\n");
+			break;
+		default:
+			ast->chip = AST2100;
+			drm_info(dev, "AST 2100 detected\n");
+			break;
+		}
+	} else {
+		ast->chip = AST2000;
+		drm_info(dev, "AST 2000 detected\n");
+	}
+
+	return 0;
+}
+
+static void ast_detect_widescreen(struct ast_device *ast)
+{
+	u8 jreg;
+
+	/* Check if we support wide screen */
+	switch (AST_GEN(ast)) {
+	case 1:
+		ast->support_wide_screen = false;
+		break;
+	default:
+		jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
+		if (!(jreg & 0x80))
+			ast->support_wide_screen = true;
+		else if (jreg & 0x01)
+			ast->support_wide_screen = true;
+		else {
+			ast->support_wide_screen = false;
+			if (ast->chip == AST1300)
+				ast->support_wide_screen = true;
+			if (ast->chip == AST1400)
+				ast->support_wide_screen = true;
+			if (ast->chip == AST2510)
+				ast->support_wide_screen = true;
+			if (IS_AST_GEN7(ast))
+				ast->support_wide_screen = true;
+		}
+		break;
+	}
+}
+
+static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
+{
+	struct drm_device *dev = &ast->base;
+	u8 jreg;
+
+	/* Check 3rd Tx option (digital output afaik) */
+	ast->tx_chip_types |= AST_TX_NONE_BIT;
+
+	/*
+	 * VGACRA3 Enhanced Color Mode Register, check if DVO is already
+	 * enabled, in that case, assume we have a SIL164 TMDS transmitter
+	 *
+	 * Don't make that assumption if we the chip wasn't enabled and
+	 * is at power-on reset, otherwise we'll incorrectly "detect" a
+	 * SIL164 when there is none.
+	 */
+	if (!need_post) {
+		jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
+		if (jreg & 0x80)
+			ast->tx_chip_types = AST_TX_SIL164_BIT;
+	}
+
+	if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast) || IS_AST_GEN6(ast)) {
+		/*
+		 * On AST GEN4+, look the configuration set by the SoC in
+		 * the SOC scratch register #1 bits 11:8 (interestingly marked
+		 * as "reserved" in the spec)
+		 */
+		jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
+		switch (jreg) {
+		case 0x04:
+			ast->tx_chip_types = AST_TX_SIL164_BIT;
+			break;
+		case 0x08:
+			ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
+			if (ast->dp501_fw_addr) {
+				/* backup firmware */
+				if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
+					drmm_kfree(dev, ast->dp501_fw_addr);
+					ast->dp501_fw_addr = NULL;
+				}
+			}
+			fallthrough;
+		case 0x0c:
+			ast->tx_chip_types = AST_TX_DP501_BIT;
+		}
+	} else if (IS_AST_GEN7(ast)) {
+		if (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xD1, TX_TYPE_MASK) ==
+		    ASTDP_DPMCU_TX) {
+			ast->tx_chip_types = AST_TX_ASTDP_BIT;
+			ast_dp_launch(&ast->base);
+		}
+	}
+
+	/* Print stuff for diagnostic purposes */
+	if (ast->tx_chip_types & AST_TX_NONE_BIT)
+		drm_info(dev, "Using analog VGA\n");
+	if (ast->tx_chip_types & AST_TX_SIL164_BIT)
+		drm_info(dev, "Using Sil164 TMDS transmitter\n");
+	if (ast->tx_chip_types & AST_TX_DP501_BIT)
+		drm_info(dev, "Using DP501 DisplayPort transmitter\n");
+	if (ast->tx_chip_types & AST_TX_ASTDP_BIT)
+		drm_info(dev, "Using ASPEED DisplayPort transmitter\n");
+}
+
+static int ast_get_dram_info(struct drm_device *dev)
+{
+	struct device_node *np = dev->dev->of_node;
+	struct ast_device *ast = to_ast_device(dev);
+	uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
+	uint32_t denum, num, div, ref_pll, dsel;
+
+	switch (ast->config_mode) {
+	case ast_use_dt:
+		/*
+		 * If some properties are missing, use reasonable
+		 * defaults for GEN5
+		 */
+		if (of_property_read_u32(np, "aspeed,mcr-configuration",
+					 &mcr_cfg))
+			mcr_cfg = 0x00000577;
+		if (of_property_read_u32(np, "aspeed,mcr-scu-mpll",
+					 &mcr_scu_mpll))
+			mcr_scu_mpll = 0x000050C0;
+		if (of_property_read_u32(np, "aspeed,mcr-scu-strap",
+					 &mcr_scu_strap))
+			mcr_scu_strap = 0;
+		break;
+	case ast_use_p2a:
+		ast_write32(ast, 0xf004, 0x1e6e0000);
+		ast_write32(ast, 0xf000, 0x1);
+		mcr_cfg = ast_read32(ast, 0x10004);
+		mcr_scu_mpll = ast_read32(ast, 0x10120);
+		mcr_scu_strap = ast_read32(ast, 0x10170);
+		break;
+	case ast_use_defaults:
+	default:
+		ast->dram_bus_width = 16;
+		ast->dram_type = AST_DRAM_1Gx16;
+		if (IS_AST_GEN6(ast))
+			ast->mclk = 800;
+		else
+			ast->mclk = 396;
+		return 0;
+	}
+
+	if (mcr_cfg & 0x40)
+		ast->dram_bus_width = 16;
+	else
+		ast->dram_bus_width = 32;
+
+	if (IS_AST_GEN6(ast)) {
+		switch (mcr_cfg & 0x03) {
+		case 0:
+			ast->dram_type = AST_DRAM_1Gx16;
+			break;
+		default:
+		case 1:
+			ast->dram_type = AST_DRAM_2Gx16;
+			break;
+		case 2:
+			ast->dram_type = AST_DRAM_4Gx16;
+			break;
+		case 3:
+			ast->dram_type = AST_DRAM_8Gx16;
+			break;
+		}
+	} else if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast)) {
+		switch (mcr_cfg & 0x03) {
+		case 0:
+			ast->dram_type = AST_DRAM_512Mx16;
+			break;
+		default:
+		case 1:
+			ast->dram_type = AST_DRAM_1Gx16;
+			break;
+		case 2:
+			ast->dram_type = AST_DRAM_2Gx16;
+			break;
+		case 3:
+			ast->dram_type = AST_DRAM_4Gx16;
+			break;
+		}
+	} else {
+		switch (mcr_cfg & 0x0c) {
+		case 0:
+		case 4:
+			ast->dram_type = AST_DRAM_512Mx16;
+			break;
+		case 8:
+			if (mcr_cfg & 0x40)
+				ast->dram_type = AST_DRAM_1Gx16;
+			else
+				ast->dram_type = AST_DRAM_512Mx32;
+			break;
+		case 0xc:
+			ast->dram_type = AST_DRAM_1Gx32;
+			break;
+		}
+	}
+
+	if (mcr_scu_strap & 0x2000)
+		ref_pll = 14318;
+	else
+		ref_pll = 12000;
+
+	denum = mcr_scu_mpll & 0x1f;
+	num = (mcr_scu_mpll & 0x3fe0) >> 5;
+	dsel = (mcr_scu_mpll & 0xc000) >> 14;
+	switch (dsel) {
+	case 3:
+		div = 0x4;
+		break;
+	case 2:
+	case 1:
+		div = 0x2;
+		break;
+	default:
+		div = 0x1;
+		break;
+	}
+	ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
+	return 0;
+}
+
+struct ast_device *ast_device_create(const struct drm_driver *drv,
+				     struct pci_dev *pdev,
+				     unsigned long flags)
+{
+	struct drm_device *dev;
+	struct ast_device *ast;
+	bool need_post = false;
+	int ret = 0;
+
+	ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_device, base);
+	if (IS_ERR(ast))
+		return ast;
+	dev = &ast->base;
+
+	pci_set_drvdata(pdev, dev);
+
+	ret = drmm_mutex_init(dev, &ast->ioregs_lock);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ast->regs = pcim_iomap(pdev, 1, 0);
+	if (!ast->regs)
+		return ERR_PTR(-EIO);
+
+	/*
+	 * After AST2500, MMIO is enabled by default, and it should be adopted
+	 * to be compatible with Arm.
+	 */
+	if (pdev->revision >= 0x40) {
+		ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
+	} else if (!(pci_resource_flags(pdev, 2) & IORESOURCE_IO)) {
+		drm_info(dev, "platform has no IO space, trying MMIO\n");
+		ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
+	}
+
+	/* "map" IO regs if the above hasn't done so already */
+	if (!ast->ioregs) {
+		ast->ioregs = pcim_iomap(pdev, 2, 0);
+		if (!ast->ioregs)
+			return ERR_PTR(-EIO);
+	}
+
+	if (!ast_is_vga_enabled(dev)) {
+		drm_info(dev, "VGA not enabled on entry, requesting chip POST\n");
+		need_post = true;
+	}
+
+	/*
+	 * If VGA isn't enabled, we need to enable now or subsequent
+	 * access to the scratch registers will fail.
+	 */
+	if (need_post)
+		ast_enable_vga(dev);
+
+	/* Enable extended register access */
+	ast_open_key(ast);
+	ret = ast_enable_mmio(ast);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ret = ast_device_config_init(ast);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ast_detect_widescreen(ast);
+	ast_detect_tx_chip(ast, need_post);
+
+	ret = ast_get_dram_info(dev);
+	if (ret)
+		return ERR_PTR(ret);
+
+	drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
+		 ast->mclk, ast->dram_type, ast->dram_bus_width);
+
+	if (need_post)
+		ast_post_gpu(dev);
+
+	ret = ast_mm_init(ast);
+	if (ret)
+		return ERR_PTR(ret);
+
+	/* map reserved buffer */
+	ast->dp501_fw_buf = NULL;
+	if (ast->vram_size < pci_resource_len(pdev, 0)) {
+		ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0);
+		if (!ast->dp501_fw_buf)
+			drm_info(dev, "failed to map reserved buffer!\n");
+	}
+
+	ret = ast_mode_config_init(ast);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return ast;
+}