drm/ast: Support device quirks

Define struct ast_device_quirks and add an instance for each hardware
generation. The type will provide information about per-gen constants
and oddities.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>>
Link: https://lore.kernel.org/r/20251007150343.273718-3-tzimmermann@suse.de

drivers/gpu/drm/ast/ast_2000.c

@@ -211,6 +211,9 @@ void ast_2000_detect_tx_chip(struct ast_device *ast, bool need_post)
 	__ast_device_set_tx_chip(ast, tx_chip);
 }
 
+static const struct ast_device_quirks ast_2000_device_quirks = {
+};
+
 struct drm_device *ast_2000_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -228,7 +231,7 @@ struct drm_device *ast_2000_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2000_device_quirks);
 
 	ast->dclk_table = ast_2000_dclk_table;
 

drivers/gpu/drm/ast/ast_2100.c

@@ -432,6 +432,9 @@ static void ast_2100_detect_widescreen(struct ast_device *ast)
 		ast->support_wuxga = true;
 }
 
+static const struct ast_device_quirks ast_2100_device_quirks = {
+};
+
 struct drm_device *ast_2100_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -449,7 +452,7 @@ struct drm_device *ast_2100_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2100_device_quirks);
 
 	ast->dclk_table = ast_2000_dclk_table;
 

drivers/gpu/drm/ast/ast_2200.c

@@ -43,6 +43,9 @@ static void ast_2200_detect_widescreen(struct ast_device *ast)
 		ast->support_wuxga = true;
 }
 
+static const struct ast_device_quirks ast_2200_device_quirks = {
+};
+
 struct drm_device *ast_2200_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -60,7 +63,7 @@ struct drm_device *ast_2200_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2200_device_quirks);
 
 	ast->dclk_table = ast_2000_dclk_table;
 

drivers/gpu/drm/ast/ast_2300.c

@@ -1407,6 +1407,9 @@ static void ast_2300_detect_widescreen(struct ast_device *ast)
 		ast->support_wuxga = true;
 }
 
+static const struct ast_device_quirks ast_2300_device_quirks = {
+};
+
 struct drm_device *ast_2300_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -1424,7 +1427,7 @@ struct drm_device *ast_2300_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2300_device_quirks);
 
 	ast->dclk_table = ast_2000_dclk_table;
 

drivers/gpu/drm/ast/ast_2400.c

@@ -44,6 +44,9 @@ static void ast_2400_detect_widescreen(struct ast_device *ast)
 		ast->support_wuxga = true;
 }
 
+static const struct ast_device_quirks ast_2400_device_quirks = {
+};
+
 struct drm_device *ast_2400_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -61,7 +64,7 @@ struct drm_device *ast_2400_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2400_device_quirks);
 
 	ast->dclk_table = ast_2000_dclk_table;
 

drivers/gpu/drm/ast/ast_2500.c

@@ -618,6 +618,9 @@ static void ast_2500_detect_widescreen(struct ast_device *ast)
 		ast->support_wuxga = true;
 }
 
+static const struct ast_device_quirks ast_2500_device_quirks = {
+};
+
 struct drm_device *ast_2500_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -635,7 +638,7 @@ struct drm_device *ast_2500_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2500_device_quirks);
 
 	ast->dclk_table = ast_2500_dclk_table;
 

drivers/gpu/drm/ast/ast_2600.c

@@ -59,6 +59,9 @@ static void ast_2600_detect_widescreen(struct ast_device *ast)
 		ast->support_wuxga = true;
 }
 
+static const struct ast_device_quirks ast_2600_device_quirks = {
+};
+
 struct drm_device *ast_2600_device_create(struct pci_dev *pdev,
 					  const struct drm_driver *drv,
 					  enum ast_chip chip,
@@ -76,7 +79,7 @@ struct drm_device *ast_2600_device_create(struct pci_dev *pdev,
 		return ERR_CAST(ast);
 	dev = &ast->base;
 
-	ast_device_init(ast, chip, config_mode, regs, ioregs);
+	ast_device_init(ast, chip, config_mode, regs, ioregs, &ast_2600_device_quirks);
 
 	ast->dclk_table = ast_2500_dclk_table;
 

drivers/gpu/drm/ast/ast_drv.c

@@ -51,8 +51,10 @@ void ast_device_init(struct ast_device *ast,
 		     enum ast_chip chip,
 		     enum ast_config_mode config_mode,
 		     void __iomem *regs,
-		     void __iomem *ioregs)
+		     void __iomem *ioregs,
+		     const struct ast_device_quirks *quirks)
 {
+	ast->quirks = quirks;
 	ast->chip = chip;
 	ast->config_mode = config_mode;
 	ast->regs = regs;

drivers/gpu/drm/ast/ast_drv.h

@@ -164,9 +164,14 @@ to_ast_connector(struct drm_connector *connector)
  * Device
  */
 
+struct ast_device_quirks {
+};
+
 struct ast_device {
 	struct drm_device base;
 
+	const struct ast_device_quirks *quirks;
+
 	void __iomem *regs;
 	void __iomem *ioregs;
 	void __iomem *dp501_fw_buf;
@@ -414,7 +419,8 @@ void ast_device_init(struct ast_device *ast,
 		     enum ast_chip chip,
 		     enum ast_config_mode config_mode,
 		     void __iomem *regs,
-		     void __iomem *ioregs);
+		     void __iomem *ioregs,
+		     const struct ast_device_quirks *quirks);
 void __ast_device_set_tx_chip(struct ast_device *ast, enum ast_tx_chip tx_chip);
 
 /* ast_2000.c */