From: Aurabindo Pillai aurabindo.pillai@amd.com
[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: db11e20a1144 ("drm/amd/display: use a more lax vblank enable policy for older ASICs") Fixes: 6dfb3a42a914 ("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 Cc: stable@vger.kernel.org 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 --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index a4882b16ace2..6ea54eb5d68d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8379,7 +8379,8 @@ 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 */