drm/msm: add disp snapshot points across dpu driver

Add snapshot points across dpu driver to trigger dumps when critical
errors are hit.

changes in v5:
 - change the callers to use the snapshot function directly
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/1618606645-19695-8-git-send-email-abhinavk@codeaurora.orgSigned-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2018, 2020-2021 The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  */
@@ -26,6 +26,7 @@
 #include "dpu_crtc.h"
 #include "dpu_trace.h"
 #include "dpu_core_irq.h"
+#include "disp/msm_disp_snapshot.h"
 
 #define DPU_DEBUG_ENC(e, fmt, ...) DPU_DEBUG("enc%d " fmt,\
 		(e) ? (e)->base.base.id : -1, ##__VA_ARGS__)
@@ -1336,6 +1337,11 @@ static void dpu_encoder_underrun_callback(struct drm_encoder *drm_enc,
 
 	DPU_ATRACE_BEGIN("encoder_underrun_callback");
 	atomic_inc(&phy_enc->underrun_cnt);
+
+	/* trigger dump only on the first underrun */
+	if (atomic_read(&phy_enc->underrun_cnt) == 1)
+		msm_disp_snapshot_state(drm_enc->dev);
+
 	trace_dpu_enc_underrun_cb(DRMID(drm_enc),
 				  atomic_read(&phy_enc->underrun_cnt));
 	DPU_ATRACE_END("encoder_underrun_callback");
@@ -1565,19 +1571,23 @@ static void dpu_encoder_helper_hw_reset(struct dpu_encoder_phys *phys_enc)
 	struct dpu_encoder_virt *dpu_enc;
 	struct dpu_hw_ctl *ctl;
 	int rc;
+	struct drm_encoder *drm_enc;
 
 	dpu_enc = to_dpu_encoder_virt(phys_enc->parent);
 	ctl = phys_enc->hw_ctl;
+	drm_enc = phys_enc->parent;
 
 	if (!ctl->ops.reset)
 		return;
 
-	DRM_DEBUG_KMS("id:%u ctl %d reset\n", DRMID(phys_enc->parent),
+	DRM_DEBUG_KMS("id:%u ctl %d reset\n", DRMID(drm_enc),
 		      ctl->idx);
 
 	rc = ctl->ops.reset(ctl);
-	if (rc)
+	if (rc) {
 		DPU_ERROR_ENC(dpu_enc, "ctl %d reset failure\n",  ctl->idx);
+		msm_disp_snapshot_state(drm_enc->dev);
+	}
 
 	phys_enc->enable_state = DPU_ENC_ENABLED;
 }

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2015-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2018, 2020-2021 The Linux Foundation. All rights reserved.
  */
 
 #define pr_fmt(fmt)	"[drm:%s:%d] " fmt, __func__, __LINE__
@@ -11,6 +11,7 @@
 #include "dpu_core_irq.h"
 #include "dpu_formats.h"
 #include "dpu_trace.h"
+#include "disp/msm_disp_snapshot.h"
 
 #define DPU_DEBUG_CMDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \
 		(e) && (e)->base.parent ? \
@@ -191,10 +192,13 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
 			to_dpu_encoder_phys_cmd(phys_enc);
 	u32 frame_event = DPU_ENCODER_FRAME_EVENT_ERROR;
 	bool do_log = false;
+	struct drm_encoder *drm_enc;
 
 	if (!phys_enc->hw_pp)
 		return -EINVAL;
 
+	drm_enc = phys_enc->parent;
+
 	cmd_enc->pp_timeout_report_cnt++;
 	if (cmd_enc->pp_timeout_report_cnt == PP_TIMEOUT_MAX_TRIALS) {
 		frame_event |= DPU_ENCODER_FRAME_EVENT_PANEL_DEAD;
@@ -203,7 +207,7 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
 		do_log = true;
 	}
 
-	trace_dpu_enc_phys_cmd_pdone_timeout(DRMID(phys_enc->parent),
+	trace_dpu_enc_phys_cmd_pdone_timeout(DRMID(drm_enc),
 		     phys_enc->hw_pp->idx - PINGPONG_0,
 		     cmd_enc->pp_timeout_report_cnt,
 		     atomic_read(&phys_enc->pending_kickoff_cnt),
@@ -212,12 +216,12 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
 	/* to avoid flooding, only log first time, and "dead" time */
 	if (do_log) {
 		DRM_ERROR("id:%d pp:%d kickoff timeout %d cnt %d koff_cnt %d\n",
-			  DRMID(phys_enc->parent),
+			  DRMID(drm_enc),
 			  phys_enc->hw_pp->idx - PINGPONG_0,
 			  phys_enc->hw_ctl->idx - CTL_0,
 			  cmd_enc->pp_timeout_report_cnt,
 			  atomic_read(&phys_enc->pending_kickoff_cnt));
-
+		msm_disp_snapshot_state(drm_enc->dev);
 		dpu_encoder_helper_unregister_irq(phys_enc, INTR_IDX_RDPTR);
 	}
 
@@ -228,7 +232,7 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
 
 	if (phys_enc->parent_ops->handle_frame_done)
 		phys_enc->parent_ops->handle_frame_done(
-				phys_enc->parent, phys_enc, frame_event);
+				drm_enc, phys_enc, frame_event);
 
 	return -ETIMEDOUT;
 }

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c

 // SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015-2018, 2020-2021 The Linux Foundation. All rights reserved.
  */
 
 #define pr_fmt(fmt)	"[drm:%s:%d] " fmt, __func__, __LINE__
@@ -9,6 +9,7 @@
 #include "dpu_core_irq.h"
 #include "dpu_formats.h"
 #include "dpu_trace.h"
+#include "disp/msm_disp_snapshot.h"
 
 #define DPU_DEBUG_VIDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \
 		(e) && (e)->parent ? \
@@ -468,6 +469,7 @@ static void dpu_encoder_phys_vid_enable(struct dpu_encoder_phys *phys_enc)
 		"update pending flush ctl %d intf %d\n",
 		ctl->idx - CTL_0, phys_enc->hw_intf->idx);
 
+	atomic_set(&phys_enc->underrun_cnt, 0);
 
 	/* ctl_flush & timing engine enable will be triggered by framework */
 	if (phys_enc->enable_state == DPU_ENC_DISABLED)
@@ -537,6 +539,9 @@ static void dpu_encoder_phys_vid_prepare_for_kickoff(
 {
 	struct dpu_hw_ctl *ctl;
 	int rc;
+	struct drm_encoder *drm_enc;
+
+	drm_enc = phys_enc->parent;
 
 	ctl = phys_enc->hw_ctl;
 	if (!ctl->ops.wait_reset_status)
@@ -550,6 +555,7 @@ static void dpu_encoder_phys_vid_prepare_for_kickoff(
 	if (rc) {
 		DPU_ERROR_VIDENC(phys_enc, "ctl %d reset failure: %d\n",
 				ctl->idx, rc);
+		msm_disp_snapshot_state(drm_enc->dev);
 		dpu_encoder_helper_unregister_irq(phys_enc, INTR_IDX_VSYNC);
 	}
 }