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drm/msm/dpu: capture snapshot on the first commit_done timeout

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In order to debug commit_done timeouts, capture the devcoredump state
when the first timeout occurs after the encoder has been enabled.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/579850/
Link: https://lore.kernel.org/r/20240226-fd-dpu-debug-timeout-v4-3-51eec83dde23@linaro.org
This commit is contained in:
Dmitry Baryshkov 2024-02-26 04:28:01 +02:00
parent d72a3d35b7
commit 4be445f5b6
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
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@ -126,6 +126,8 @@ enum dpu_enc_rc_states {
* @base: drm_encoder base class for registration with DRM
* @enc_spinlock: Virtual-Encoder-Wide Spin Lock for IRQ purposes
* @enabled: True if the encoder is active, protected by enc_lock
* @commit_done_timedout: True if there has been a timeout on commit after
* enabling the encoder.
* @num_phys_encs: Actual number of physical encoders contained.
* @phys_encs: Container of physical encoders managed.
* @cur_master: Pointer to the current master in this mode. Optimization
@ -172,6 +174,7 @@ struct dpu_encoder_virt {
spinlock_t enc_spinlock;
bool enabled;
bool commit_done_timedout;
unsigned int num_phys_encs;
struct dpu_encoder_phys *phys_encs[MAX_PHYS_ENCODERS_PER_VIRTUAL];
@ -1269,6 +1272,9 @@ static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc,
atomic_set(&dpu_enc->frame_done_timeout_cnt, 0);
mutex_lock(&dpu_enc->enc_lock);
dpu_enc->commit_done_timedout = false;
cur_mode = &dpu_enc->base.crtc->state->adjusted_mode;
dpu_enc->wide_bus_en = dpu_encoder_is_widebus_enabled(drm_enc);
@ -2553,6 +2559,10 @@ int dpu_encoder_wait_for_commit_done(struct drm_encoder *drm_enc)
DPU_ATRACE_BEGIN("wait_for_commit_done");
ret = phys->ops.wait_for_commit_done(phys);
DPU_ATRACE_END("wait_for_commit_done");
if (ret == -ETIMEDOUT && !dpu_enc->commit_done_timedout) {
dpu_enc->commit_done_timedout = true;
msm_disp_snapshot_state(drm_enc->dev);
}
if (ret)
return ret;
}