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drm/msm/dpu: Skip trigger flush and start for CWB

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For concurrent writeback, the real time encoder is responsible for
trigger flush and trigger start. Return early for trigger start and
trigger flush for the concurrent writeback encoders.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/637505/
Link: https://lore.kernel.org/r/20250214-concurrent-wb-v6-12-a44c293cf422@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Jessica Zhang 2025-02-14 16:14:35 -08:00 • committed by Dmitry Baryshkov
parent 95bbde1d0d
commit 8144d17a81
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
View file

@ -1618,6 +1618,7 @@ static void dpu_encoder_off_work(struct work_struct *work)
static void _dpu_encoder_trigger_flush(struct drm_encoder *drm_enc,
struct dpu_encoder_phys *phys, uint32_t extra_flush_bits)
{
struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
struct dpu_hw_ctl *ctl;
int pending_kickoff_cnt;
u32 ret = UINT_MAX;
@ -1635,6 +1636,15 @@ static void _dpu_encoder_trigger_flush(struct drm_encoder *drm_enc,
pending_kickoff_cnt = dpu_encoder_phys_inc_pending(phys);
/* Return early if encoder is writeback and in clone mode */
if (drm_enc->encoder_type == DRM_MODE_ENCODER_VIRTUAL &&
dpu_enc->cwb_mask) {
DPU_DEBUG("encoder %d skip flush for concurrent writeback encoder\n",
DRMID(drm_enc));
return;
}
if (extra_flush_bits && ctl->ops.update_pending_flush)
ctl->ops.update_pending_flush(ctl, extra_flush_bits);
@ -1657,6 +1667,8 @@ static void _dpu_encoder_trigger_flush(struct drm_encoder *drm_enc,
*/
static void _dpu_encoder_trigger_start(struct dpu_encoder_phys *phys)
{
struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(phys->parent);
if (!phys) {
DPU_ERROR("invalid argument(s)\n");
return;
@ -1667,6 +1679,12 @@ static void _dpu_encoder_trigger_start(struct dpu_encoder_phys *phys)
return;
}
if (phys->parent->encoder_type == DRM_MODE_ENCODER_VIRTUAL &&
dpu_enc->cwb_mask) {
DPU_DEBUG("encoder %d CWB enabled, skipping\n", DRMID(phys->parent));
return;
}
if (phys->ops.trigger_start && phys->enable_state != DPU_ENC_DISABLED)
phys->ops.trigger_start(phys);
}