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

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[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: 58a261bfc9 ("drm/amd/display: use a more lax vblank enable policy for older ASICs")
Fixes: e45b6716de ("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: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 9b47278cec)
Cc: stable@vger.kernel.org
This commit is contained in:
Aurabindo Pillai
2024-10-01 18:03:02 -04:00
committed by Alex Deucher
parent f67644b219
commit 23d16ede33
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -8374,7 +8374,8 @@ 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 */