diff options
| author | Kalyan Thota <kalyan_t@codeaurora.org> | 2021-02-18 15:35:46 +0300 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-04-07 21:05:43 +0300 |
| commit | 73743e72fed4aaec98fbe7dce749e1560b1bf758 (patch) | |
| tree | cb90b2d30b6bdaec139fc6dc9698f5c183777853 /drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | |
| parent | 3ab1c5cc3939b3322ebd27a44b8ee6a16eccc9f5 (diff) | |
| download | linux-73743e72fed4aaec98fbe7dce749e1560b1bf758.tar.xz | |
drm/msm/disp/dpu1: turn off vblank irqs aggressively in dpu driver
Set the flag vblank_disable_immediate = true to turn off vblank irqs
immediately as soon as drm_vblank_put is requested so that there are
no irqs triggered during idle state. This will reduce cpu wakeups
and help in power saving.
To enable vblank_disable_immediate flag the underlying KMS driver
needs to support high precision vblank timestamping and also a
reliable way of providing vblank counter which is incrementing
at the leading edge of vblank.
This patch also brings in changes to support vblank_disable_immediate
requirement in dpu driver.
Changes in v1:
- Specify reason to add vblank timestamp support. (Rob).
- Add changes to provide vblank counter from dpu driver.
Changes in v2:
- Fix warn stack reported by Rob Clark with v2 patch.
Changes in v3:
- Move back to HW frame counter (Rob).
Changes in v4:
- Frame count mismatch was causing a DRM WARN stack spew.
DPU HW will increment the frame count at the end of
the sync, where as vblank will be triggered at the
fetch_start counter which is calculated as v_total - vfp.
This is to start fetching early for panels with low
vbp w.r.t hw latency lines.
Add logic to detect the line count if it falls between
vactive and v_total then return incremented frame count value.
Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org>
Link: https://lore.kernel.org/r/1613651746-12783-1-git-send-email-kalyan_t@codeaurora.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h index f8f25157f635..ecbc4be98980 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h @@ -143,6 +143,7 @@ struct dpu_encoder_phys_ops { void (*prepare_idle_pc)(struct dpu_encoder_phys *phys_enc); void (*restore)(struct dpu_encoder_phys *phys); int (*get_line_count)(struct dpu_encoder_phys *phys); + int (*get_frame_count)(struct dpu_encoder_phys *phys); }; /** |