From: Jammy Huang <jammy_huang@xxxxxxxxxxxxxx>
commit 12c35c5582acb0fd8f7713ffa75f450766022ff1 upstream.
Suspend will disable pcie device. Thus, resume should do full hw
initialization again.
Add some APIs to ast_drm_thaw() before ast_post_gpu() to fix the issue.
v2:
- fix function-call arguments
Fixes: 5b71707dd13c ("drm/ast: Enable and unlock device access early during init")
Reported-by: Cary Garrett <cogarre@xxxxxxxxx>
Closes: https://lore.kernel.org/dri-devel/8ce1e1cc351153a890b65e62fed93b54ccd43f6a.camel@xxxxxxxxx/
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v6.6+
Signed-off-by: Jammy Huang <jammy_huang@xxxxxxxxxxxxxx>
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240718030352.654155-1-jammy_huang@xxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ast/ast_drv.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -138,6 +138,11 @@ static int ast_drm_freeze(struct drm_dev
static int ast_drm_thaw(struct drm_device *dev)
{
+ struct ast_device *ast = to_ast_device(dev);
+
+ ast_enable_vga(ast->ioregs);
+ ast_open_key(ast->ioregs);
+ ast_enable_mmio(dev->dev, ast->ioregs);
ast_post_gpu(dev);
return drm_mode_config_helper_resume(dev);
Patches currently in stable-queue which might be from jammy_huang@xxxxxxxxxxxxxx are
queue-6.6/drm-ast-fix-black-screen-after-resume.patch
