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drm/ast: Fix black screen after resume

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BugLink: https://bugs.launchpad.net/bugs/2083488
BugLink: https://bugs.launchpad.net/bugs/2083022

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: 5b71707dd1 ("drm/ast: Enable and unlock device access early during init")
Reported-by: Cary Garrett <cogarre@gmail.com>
Closes: https://lore.kernel.org/dri-devel/8ce1e1cc351153a890b65e62fed93b54ccd43f6a.camel@gmail.com/
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v6.6+
Signed-off-by: Jammy Huang <jammy_huang@aspeedtech.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240718030352.654155-1-jammy_huang@aspeedtech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Jammy Huang
2024-07-18 11:03:52 +08:00
committed by Mehmet Basaran
parent a048c83ee4
commit e3d4057e4c
1 changed files with 5 additions and 0 deletions
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drivers/gpu/drm/ast/ast_drv.c
+5
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@@ -390,6 +390,11 @@ 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(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);