On Tue, 28 Nov 2023 at 19:43, Paloma Arellano <quic_parellan@xxxxxxxxxxx> wrote: > > > 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. Works for me too. I suggested atomic_inc_test() because then we can let devcoredump take care of duplicate events. > > 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 > >> > > -- With best wishes Dmitry