diff options
| author | Mark Yacoub <markyacoub@google.com> | 2021-08-30 14:13:59 -0400 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-10-15 12:59:20 -0700 |
| commit | 885455d6bf829e71a9cfe51fca06ade509c088d6 (patch) | |
| tree | 1d8f4f04582b093f4c31c0dd0a6856ffcbeb0a3c | |
| parent | f25f656608e3a54ac3e0747be415cf3d4a69cef8 (diff) | |
| download | linux-885455d6bf829e71a9cfe51fca06ade509c088d6.tar.bz2 | |
drm/msm: Change dpu_crtc_get_vblank_counter to use vsync count.
[why]
vsync_cnt atomic counter increments for every hw vsync. On the other
hand, frame count is a register that increments when the frame gets
actually pushed out. We cannnot read this register whenever the timing
engine is off, but vblank counter should still return a valid number.
This behavior also matches the downstream driver.
[How]
Read the encoder vsync count instead of the dpu_encoder_phys frame
count.
Suggested-by: Abhinav Kumar <abhinavk@codeaurora.org>
CC: Rob Clark <robdclark@chromium.org>
Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Link: https://lore.kernel.org/r/20210830181359.124267-1-markyacoub@chromium.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 16 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 4 |
3 files changed, 9 insertions, 19 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index 768012243b44..eecfa88517e0 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -72,15 +72,13 @@ static struct drm_encoder *get_encoder_from_crtc(struct drm_crtc *crtc) static u32 dpu_crtc_get_vblank_counter(struct drm_crtc *crtc) { - struct drm_encoder *encoder; - - encoder = get_encoder_from_crtc(crtc); + struct drm_encoder *encoder = get_encoder_from_crtc(crtc); if (!encoder) { DRM_ERROR("no encoder found for crtc %d\n", crtc->index); - return false; + return 0; } - return dpu_encoder_get_frame_count(encoder); + return dpu_encoder_get_vsync_count(encoder); } static bool dpu_crtc_get_scanout_position(struct drm_crtc *crtc, diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 0e9d3fa1544b..f564cef948f0 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -395,19 +395,11 @@ int dpu_encoder_helper_unregister_irq(struct dpu_encoder_phys *phys_enc, return 0; } -int dpu_encoder_get_frame_count(struct drm_encoder *drm_enc) +int dpu_encoder_get_vsync_count(struct drm_encoder *drm_enc) { - struct dpu_encoder_virt *dpu_enc; - struct dpu_encoder_phys *phys; - int framecount = 0; - - dpu_enc = to_dpu_encoder_virt(drm_enc); - phys = dpu_enc ? dpu_enc->cur_master : NULL; - - if (phys && phys->ops.get_frame_count) - framecount = phys->ops.get_frame_count(phys); - - return framecount; + struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc); + struct dpu_encoder_phys *phys = dpu_enc ? dpu_enc->cur_master : NULL; + return phys ? atomic_read(&phys->vsync_cnt) : 0; } int dpu_encoder_get_linecount(struct drm_encoder *drm_enc) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h index 99a5d73c9b88..e241914a9677 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h @@ -163,9 +163,9 @@ void dpu_encoder_set_idle_timeout(struct drm_encoder *drm_enc, int dpu_encoder_get_linecount(struct drm_encoder *drm_enc); /** - * dpu_encoder_get_frame_count - get interface frame count for the encoder. + * dpu_encoder_get_vsync_count - get vsync count for the encoder. * @drm_enc: Pointer to previously created drm encoder structure */ -int dpu_encoder_get_frame_count(struct drm_encoder *drm_enc); +int dpu_encoder_get_vsync_count(struct drm_encoder *drm_enc); #endif /* __DPU_ENCODER_H__ */ |