Commit 9b47278c authored by Aurabindo Pillai's avatar Aurabindo Pillai Committed by Alex Deucher
Browse files

drm/amd/display: temp w/a for dGPU to enter idle optimizations 



[Why&How]
vblank immediate disable currently does not work for all asics. On
DCN401, the vblank interrupts never stop coming, and hence we never
get a chance to trigger idle optimizations.

Add a workaround to enable immediate disable only on APUs for now. This
adds a 2-frame delay for triggering idle optimization, which is a
negligible overhead.

Fixes: 58a261bf ("drm/amd/display: use a more lax vblank enable policy for older ASICs")
Fixes: e45b6716 ("drm/amd/display: use a more lax vblank enable policy for DCN35+")
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Reviewed-by: default avatarRodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: default avatarWayne Lin <wayne.lin@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5ebdb6fd

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+2 −1
Original line number Diff line number Diff line
@@ -8389,7 +8389,8 @@ static void manage_dm_interrupts(struct amdgpu_device *adev, 
		if (amdgpu_ip_version(adev, DCE_HWIP, 0) <

		    IP_VERSION(3, 5, 0) ||

		    acrtc_state->stream->link->psr_settings.psr_version <

		    DC_PSR_VERSION_UNSUPPORTED) {

		    DC_PSR_VERSION_UNSUPPORTED ||

		    !(adev->flags & AMD_IS_APU)) {

			timing = &acrtc_state->stream->timing;



			/* at least 2 frames */