1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_2100.c b/drivers/gpu/drm/ast/ast_2100.c
index 829e3b8b0d19..05aeb0624d41 100644
--- a/drivers/gpu/drm/ast/ast_2100.c
+++ b/drivers/gpu/drm/ast/ast_2100.c
@@ -27,6 +27,9 @@
  */
 
 #include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <drm/drm_drv.h>
 
 #include "ast_drv.h"
 #include "ast_post.h"
@@ -386,3 +389,92 @@ int ast_2100_post(struct ast_device *ast)
 
 	return 0;
 }
+
+/*
+ * Widescreen detection
+ */
+
+/* Try to detect WSXGA+ on Gen2+ */
+bool __ast_2100_detect_wsxga_p(struct ast_device *ast)
+{
+	u8 vgacrd0 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd0);
+
+	if (!(vgacrd0 & AST_IO_VGACRD0_VRAM_INIT_BY_BMC))
+		return true;
+	if (vgacrd0 & AST_IO_VGACRD0_IKVM_WIDESCREEN)
+		return true;
+
+	return false;
+}
+
+/* Try to detect WUXGA on Gen2+ */
+bool __ast_2100_detect_wuxga(struct ast_device *ast)
+{
+	u8 vgacrd1;
+
+	if (ast->support_fullhd) {
+		vgacrd1 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd1);
+		if (!(vgacrd1 & AST_IO_VGACRD1_SUPPORTS_WUXGA))
+			return true;
+	}
+
+	return false;
+}
+
+static void ast_2100_detect_widescreen(struct ast_device *ast)
+{
+	if (__ast_2100_detect_wsxga_p(ast)) {
+		ast->support_wsxga_p = true;
+		if (ast->chip == AST2100)
+			ast->support_fullhd = true;
+	}
+	if (__ast_2100_detect_wuxga(ast))
+		ast->support_wuxga = true;
+}
+
+static const struct ast_device_quirks ast_2100_device_quirks = {
+	.crtc_mem_req_threshold_low = 47,
+	.crtc_mem_req_threshold_high = 63,
+};
+
+struct drm_device *ast_2100_device_create(struct pci_dev *pdev,
+					  const struct drm_driver *drv,
+					  enum ast_chip chip,
+					  enum ast_config_mode config_mode,
+					  void __iomem *regs,
+					  void __iomem *ioregs,
+					  bool need_post)
+{
+	struct drm_device *dev;
+	struct ast_device *ast;
+	int ret;
+
+	ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_device, base);
+	if (IS_ERR(ast))
+		return ERR_CAST(ast);
+	dev = &ast->base;
+
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2100_device_quirks);
+
+	ast->dclk_table = ast_2000_dclk_table;
+
+	ast_2000_detect_tx_chip(ast, need_post);
+
+	if (need_post) {
+		ret = ast_post_gpu(ast);
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
+	ret = ast_mm_init(ast);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ast_2100_detect_widescreen(ast);
+
+	ret = ast_mode_config_init(ast);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return dev;
+}