On 16/09/2025 17:26, Thomas Zimmermann wrote:
Split off device initialization for Gen4 hardware into the helpers
ast_2300_device_create() and ast_2300_detect_wide_screen(). The new
functions are duplicates form their counterparts in ast_main.c, but
stripped from most non-Gen4 support.
Simplifies maintenance as the driver's number of supported hardware
generations grows.
Thanks, it looks good to me.
Reviewed-by: Jocelyn Falempe <jfale...@redhat.com>
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
---
drivers/gpu/drm/ast/ast_2300.c | 62 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/ast/ast_drv.c | 4 +++
drivers/gpu/drm/ast/ast_drv.h | 7 ++++
3 files changed, 73 insertions(+)
diff --git a/drivers/gpu/drm/ast/ast_2300.c b/drivers/gpu/drm/ast/ast_2300.c
index 68d269ef9b47..79fa660cd34e 100644
--- a/drivers/gpu/drm/ast/ast_2300.c
+++ b/drivers/gpu/drm/ast/ast_2300.c
@@ -27,8 +27,10 @@
*/
#include <linux/delay.h>
+#include <linux/pci.h>
#include <linux/sizes.h>
+#include <drm/drm_drv.h>
#include <drm/drm_managed.h>
#include <drm/drm_print.h>
@@ -1394,3 +1396,63 @@ void ast_2300_detect_tx_chip(struct ast_device *ast)
__ast_device_set_tx_chip(ast, tx_chip);
}
+
+static void ast_2300_detect_widescreen(struct ast_device *ast)
+{
+ if (__ast_2100_detect_wsxga_p(ast))
+ ast->support_wsxga_p = true;
+ else if (ast->chip == AST1300)
+ ast->support_wsxga_p = true;
+ if (ast->support_wsxga_p)
+ ast->support_fullhd = true;
+ if (__ast_2100_detect_wuxga(ast))
+ ast->support_wuxga = true;
+}
+
+struct drm_device *ast_2300_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_2300_detect_tx_chip(ast);
+
+ 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);
+
+ /* 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");
+ }
+
+ ast_2300_detect_widescreen(ast);
+
+ ret = ast_mode_config_init(ast);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return dev;
+}
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index caf41c31cc9d..8d50abbd1c3c 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -394,6 +394,10 @@ static int ast_pci_probe(struct pci_dev *pdev, const
struct pci_device_id *ent)
drm = ast_2200_device_create(pdev, &ast_driver, chip,
config_mode,
regs, ioregs, need_post);
break;
+ case 4:
+ drm = ast_2300_device_create(pdev, &ast_driver, chip,
config_mode,
+ regs, ioregs, need_post);
+ break;
default:
drm = ast_device_create(pdev, &ast_driver, chip, config_mode,
regs, ioregs,
need_post);
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 8a27835fd09c..6924f8a87e2c 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -459,6 +459,13 @@ struct drm_device *ast_2200_device_create(struct pci_dev
*pdev,
/* ast_2300.c */
int ast_2300_post(struct ast_device *ast);
void ast_2300_detect_tx_chip(struct ast_device *ast);
+struct drm_device *ast_2300_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);
/* ast_2500.c */
void ast_2500_patch_ahb(void __iomem *regs);
