From: Krishna Manikandan mkrishn@codeaurora.org
[ Upstream commit a1f2ba60eace242fd034173db3762f342a824a2e ]
Crtc perf update from frame event work can result in wrong bandwidth and clock update from dpu if the work is scheduled after the swap state has happened.
Avoid such issues by moving perf update to complete commit once the frame is accepted by the hardware.
Fixes: a29c8c024165 ("drm/msm/disp/dpu1: fix display underruns during modeset") Signed-off-by: Krishna Manikandan mkrishn@codeaurora.org Tested-by: Douglas Anderson dianders@chromium.org Link: https://lore.kernel.org/r/1622092076-5100-1-git-send-email-mkrishn@codeauror... Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index 18bc76b7f1a3..4523d6ba891b 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -407,9 +407,6 @@ static void dpu_crtc_frame_event_work(struct kthread_work *work) fevent->event); }
- if (fevent->event & DPU_ENCODER_FRAME_EVENT_DONE) - dpu_core_perf_crtc_update(crtc, 0, false); - if (fevent->event & (DPU_ENCODER_FRAME_EVENT_DONE | DPU_ENCODER_FRAME_EVENT_ERROR)) frame_done = true; @@ -477,6 +474,7 @@ static void dpu_crtc_frame_event_cb(void *data, u32 event) void dpu_crtc_complete_commit(struct drm_crtc *crtc) { trace_dpu_crtc_complete_commit(DRMID(crtc)); + dpu_core_perf_crtc_update(crtc, 0, false); _dpu_crtc_complete_flip(crtc); }