On 11/27/2023 5:48 PM, Dmitry Baryshkov wrote:
On Tue, 28 Nov 2023 at 03:12, Paloma Arellano <quic_parellan@xxxxxxxxxxx> wrote:
Trigger a devcoredump to dump dpu registers and capture the drm atomic
state when the frame_done_timer timeouts.
Signed-off-by: Paloma Arellano <quic_parellan@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 1cf7ff6caff4..5cf7594feb5a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -191,6 +191,7 @@ struct dpu_encoder_virt {
void *crtc_frame_event_cb_data;
atomic_t frame_done_timeout_ms;
+ atomic_t frame_done_timeout_cnt;
struct timer_list frame_done_timer;
struct msm_display_info disp_info;
@@ -1204,6 +1205,8 @@ static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc,
dpu_enc->dsc = dpu_encoder_get_dsc_config(drm_enc);
+ atomic_set(&dpu_enc->frame_done_timeout_cnt, 0);
+
if (disp_info->intf_type == INTF_DP)
dpu_enc->wide_bus_en = msm_dp_wide_bus_available(priv->dp[index]);
else if (disp_info->intf_type == INTF_DSI)
@@ -2115,11 +2118,12 @@ static int _dpu_encoder_status_show(struct seq_file *s, void *data)
for (i = 0; i < dpu_enc->num_phys_encs; i++) {
struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
- seq_printf(s, "intf:%d wb:%d vsync:%8d underrun:%8d ",
+ seq_printf(s, "intf:%d wb:%d vsync:%8d underrun:%8d frame_done_cnt:%d",
phys->hw_intf ? phys->hw_intf->idx - INTF_0 : -1,
phys->hw_wb ? phys->hw_wb->idx - WB_0 : -1,
atomic_read(&phys->vsync_cnt),
- atomic_read(&phys->underrun_cnt));
+ atomic_read(&phys->underrun_cnt),
+ atomic_read(&dpu_enc->frame_done_timeout_cnt));
seq_printf(s, "mode: %s\n", dpu_encoder_helper_get_intf_type(phys->intf_mode));
}
@@ -2341,6 +2345,10 @@ static void dpu_encoder_frame_done_timeout(struct timer_list *t)
DPU_ERROR_ENC(dpu_enc, "frame done timeout\n");
+ atomic_inc(&dpu_enc->frame_done_timeout_cnt);
+ if (atomic_read(&dpu_enc->frame_done_timeout_cnt) == 1)
+ msm_disp_snapshot_state(drm_enc->dev);
atomic_inc_and_test(), please
Hi Dmitry,
We only want to create a snapshot for the first instance in which the
timer timeouts. atomic_int_and_test() increments the value and then
returns whether it has a value of zero or not. FWIW I think I should
change it to 'atomic_add_return(1, &dpu_enc->frame_done_timeout_cnt)' so
that we can check only when this value equals one.
Thank you,
Paloma
+
event = DPU_ENCODER_FRAME_EVENT_ERROR;
trace_dpu_enc_frame_done_timeout(DRMID(drm_enc), event);
dpu_enc->crtc_frame_event_cb(dpu_enc->crtc_frame_event_cb_data, event);
@@ -2392,6 +2400,7 @@ struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
goto fail;
atomic_set(&dpu_enc->frame_done_timeout_ms, 0);
+ atomic_set(&dpu_enc->frame_done_timeout_cnt, 0);
timer_setup(&dpu_enc->frame_done_timer,
dpu_encoder_frame_done_timeout, 0);
--
2.41.0
