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.
Fixes: 5b71707dd13 ("drm/ast: Enable and unlock device access early during init")
Signed-off-by: Jammy Huang <jammy_huang@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/ast/ast_drv.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index f8c49ba68e78..45a9c7bf49c8 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -391,6 +391,11 @@ static int ast_drm_freeze(struct drm_device *dev)
static int ast_drm_thaw(struct drm_device *dev)
{
+ struct ast_device *ast = to_ast_device(dev);
+
+ ast_enable_vga(ioregs);
+ ast_open_key(ioregs);
+ ast_enable_mmio(dev, ioregs);
ast_post_gpu(dev);
return drm_mode_config_helper_resume(dev);
base-commit: e9d22f7a6655941fc8b2b942ed354ec780936b3e
prerequisite-patch-id: a03a33902f33bcc38091e2cdce9d79f630464c30
prerequisite-patch-id: 505779a1e2094f2ee2f2a55ad44aac5cd1d5342f
--
2.25.1
