https://bugzilla.kernel.org/show_bug.cgi?id=213779

Bug ID: 213779 Summary: Screen stays blank on resume. from hibernate Product: Drivers Version: 2.5 Kernel Version: 5.13 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: alex14641@yahoo.com Regression: No

If I close my laptop lid and reopen it, the screen stays blank. Reverting the following commit fixes the issue:

commit 9127daa0a8d88a6e6452eb8b7c9be4c3f42a867e Author: Stylon Wang stylon.wang@amd.com Date: Tue Mar 2 19:25:56 2021 +0800

drm/amd/display: Guard ASSR with internal display flag

[Why] ASSR enabling only considers capability declared in DPCD. We also need to check whether the connector is internal.

[How] ASSR enabling need to check both DPCD capability and internal display flag.

Signed-off-by: Stylon Wang stylon.wang@amd.com Reviewed-by: Harry Wentland Harry.Wentland@amd.com Acked-by: Anson Jacob Anson.Jacob@amd.com Tested-by: Dan Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com