diff options
| author | Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> | 2020-07-30 17:03:49 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-01-05 11:34:51 -0500 |
| commit | 71338cb4a7c2b519227e9d103fbb6e42eebcb705 (patch) | |
| tree | 1d51ed459354b45b318dabdbae2b807823dbddca /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | e74c8a461139b41075ede68f40c313a268445284 (diff) | |
drm/amd/display: enable idle optimizations for linux (MALL stutter)
[Why]
We can only use this feature when the display is idle. When active vblank
irq count is 0 we know all the displays are idle.
[How]
-Add a active vblank irq counter
-Update the counter when we enable/disable vblank irq
-if vblank irq count is 0 we can consider mall stutter
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Nick Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 21 |
1 files changed, 20 insertions, 1 deletions
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 419d089ad00e..98f6f7e86353 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5413,6 +5413,7 @@ static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable) struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); struct amdgpu_device *adev = drm_to_adev(crtc->dev); struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state); + struct amdgpu_display_manager *dm = &adev->dm; int rc = 0; if (enable) { @@ -5428,7 +5429,25 @@ static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable) return rc; irq_source = IRQ_TYPE_VBLANK + acrtc->otg_inst; - return dc_interrupt_set(adev->dm.dc, irq_source, enable) ? 0 : -EBUSY; + + if (!dc_interrupt_set(adev->dm.dc, irq_source, enable)) + return -EBUSY; + + mutex_lock(&dm->dc_lock); + + if (enable) + dm->active_vblank_irq_count++; + else + dm->active_vblank_irq_count--; + + dc_allow_idle_optimizations( + adev->dm.dc, dm->active_vblank_irq_count == 0 ? true : false); + + DRM_DEBUG_DRIVER("Allow idle optimizations (MALL): %d\n", dm->active_vblank_irq_count == 0); + + mutex_unlock(&dm->dc_lock); + + return 0; } static int dm_enable_vblank(struct drm_crtc *crtc) |