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Commit 91a070fe authored by Abhijit Kulkarni's avatar Abhijit Kulkarni
Browse files

disp: msm: sde: request hard reset on vsync timeout 



During frame updates if vsync timeout happens, the probable reason
is pixel_clock is turned off. In such a case the recent update is
not applied on hw and can lead to issues. For example if a pipe
was detached it will not get detached since this update will not
take place.
This change detects the timeout and requests a hard reset from user mode
driver so as to ensure that all the displays are power off and footswitch
is turned off. This will ensure dpu hardware gets reset.

Change-Id: Ic9bade88b6502feb7334d239eaf669977233dbac
Signed-off-by: default avatarAbhijit Kulkarni <kabhijit@codeaurora.org>
parent ecc89334

msm/sde/sde_encoder_phys_vid.c

+10 −1
Original line number Diff line number Diff line
@@ -877,12 +877,15 @@ static int _sde_encoder_phys_vid_wait_for_vblank( 
	u32 event = SDE_ENCODER_FRAME_EVENT_ERROR |

		SDE_ENCODER_FRAME_EVENT_SIGNAL_RELEASE_FENCE |

		SDE_ENCODER_FRAME_EVENT_SIGNAL_RETIRE_FENCE;

	struct drm_connector *conn;



	if (!phys_enc) {

		pr_err("invalid encoder\n");

		return -EINVAL;

	}



	conn = phys_enc->connector;



	wait_info.wq = &phys_enc->pending_kickoff_wq;

	wait_info.atomic_cnt = &phys_enc->pending_kickoff_cnt;

	wait_info.timeout_ms = KICKOFF_TIMEOUT_MS;
@@ -893,10 +896,16 @@ static int _sde_encoder_phys_vid_wait_for_vblank( 


	if (notify && (ret == -ETIMEDOUT) &&

	    atomic_add_unless(&phys_enc->pending_retire_fence_cnt, -1, 0) &&

	    phys_enc->parent_ops.handle_frame_done)

	    phys_enc->parent_ops.handle_frame_done) {

		phys_enc->parent_ops.handle_frame_done(

			phys_enc->parent, phys_enc, event);



		if (sde_encoder_recovery_events_enabled(phys_enc->parent))

			sde_connector_event_notify(conn,

				DRM_EVENT_SDE_HW_RECOVERY,

				sizeof(uint8_t), SDE_RECOVERY_HARD_RESET);

	}



	SDE_EVT32(DRMID(phys_enc->parent), event, notify, ret,

			ret ? SDE_EVTLOG_FATAL : 0);

	return ret;