diff mbox series

[3/3] drm/msm/dpu: Add interface support for CRC debugfs

Message ID 20220527185407.162-4-quic_jesszhan@quicinc.com
State New
Headers show
Series Expand CRC to support interface blocks | expand

Commit Message

Jessica Zhang May 27, 2022, 6:54 p.m. UTC 
Add support for writing CRC values for the interface block to
the debugfs by calling the necessary MISR setup/collect methods.

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c    | 43 ++++++++++++++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h    |  3 +
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 61 +++++++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 22 ++++++++
 4 files changed, 128 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index ae09466663cf..e830fb1e910d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -79,6 +79,8 @@  static enum dpu_crtc_crc_source dpu_crtc_parse_crc_source(const char *src_name)
 	if (!strcmp(src_name, "auto") ||
 	    !strcmp(src_name, "lm"))
 		return DPU_CRTC_CRC_SOURCE_LAYER_MIXER;
+	if (!strcmp(src_name, "intf"))
+		return DPU_CRTC_CRC_SOURCE_INTF;
 
 	return DPU_CRTC_CRC_SOURCE_INVALID;
 }
@@ -94,8 +96,18 @@  static int dpu_crtc_verify_crc_source(struct drm_crtc *crtc,
 		return -EINVAL;
 	}
 
-	if (source == DPU_CRTC_CRC_SOURCE_LAYER_MIXER)
+	if (source == DPU_CRTC_CRC_SOURCE_LAYER_MIXER) {
 		*values_cnt = crtc_state->num_mixers;
+	} else if (source == DPU_CRTC_CRC_SOURCE_INTF) {
+		struct drm_encoder *drm_enc = get_encoder_from_crtc(crtc);
+
+		if (!drm_enc) {
+			DRM_ERROR("no encoder found for crtc %d\n", crtc->index);
+			return -ENODATA;
+		}
+
+		*values_cnt = dpu_encoder_get_num_phys(drm_enc);
+	}
 
 	return 0;
 }
@@ -116,6 +128,18 @@  static void dpu_crtc_setup_lm_misr(struct dpu_crtc_state *crtc_state)
 	}
 }
 
+static void dpu_crtc_setup_encoder_misr(struct drm_crtc *crtc)
+{
+	struct drm_encoder *drm_enc = get_encoder_from_crtc(crtc);
+
+	if (!drm_enc) {
+		DRM_ERROR("no encoder found for crtc %d\n", crtc->index);
+		return;
+	}
+
+	dpu_encoder_setup_misr(drm_enc);
+}
+
 static int dpu_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
 {
 	enum dpu_crtc_crc_source source = dpu_crtc_parse_crc_source(src_name);
@@ -164,6 +188,8 @@  static int dpu_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
 
 	if (source == DPU_CRTC_CRC_SOURCE_LAYER_MIXER)
 		dpu_crtc_setup_lm_misr(crtc_state);
+	else if (source == DPU_CRTC_CRC_SOURCE_INTF)
+		dpu_crtc_setup_encoder_misr(crtc);
 
 cleanup:
 	drm_modeset_unlock(&crtc->mutex);
@@ -212,6 +238,18 @@  static int dpu_crtc_get_lm_crc(struct drm_crtc *crtc, struct dpu_crtc_state *crt
 			drm_crtc_accurate_vblank_count(crtc), crcs);
 }
 
+static int dpu_crtc_get_encoder_crc(struct drm_crtc *crtc)
+{
+	struct drm_encoder *drm_enc =  get_encoder_from_crtc(crtc);
+
+	if (!drm_enc) {
+		DRM_ERROR("no encoder found for crtc %d\n", crtc->index);
+		return -EINVAL;
+	}
+
+	return dpu_encoder_get_crc(drm_enc);
+}
+
 static int dpu_crtc_get_crc(struct drm_crtc *crtc)
 {
 	struct dpu_crtc_state *crtc_state;
@@ -227,6 +265,9 @@  static int dpu_crtc_get_crc(struct drm_crtc *crtc)
 	if (crtc_state->crc_source == DPU_CRTC_CRC_SOURCE_LAYER_MIXER)
 		return dpu_crtc_get_lm_crc(crtc, crtc_state);
 
+	if (crtc_state->crc_source == DPU_CRTC_CRC_SOURCE_INTF)
+		return dpu_crtc_get_encoder_crc(crtc);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
index b8785c394fcc..a60af034905d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
@@ -1,5 +1,6 @@ 
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2015-2021 The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
@@ -73,11 +74,13 @@  struct dpu_crtc_smmu_state_data {
  * enum dpu_crtc_crc_source: CRC source
  * @DPU_CRTC_CRC_SOURCE_NONE: no source set
  * @DPU_CRTC_CRC_SOURCE_LAYER_MIXER: CRC in layer mixer
+ * @DPU_CRTC_CRC_SOURCE_INTF: CRC in phys interface
  * @DPU_CRTC_CRC_SOURCE_INVALID: Invalid source
  */
 enum dpu_crtc_crc_source {
 	DPU_CRTC_CRC_SOURCE_NONE = 0,
 	DPU_CRTC_CRC_SOURCE_LAYER_MIXER,
+	DPU_CRTC_CRC_SOURCE_INTF,
 	DPU_CRTC_CRC_SOURCE_MAX,
 	DPU_CRTC_CRC_SOURCE_INVALID = -1
 };
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 52516eb20cb8..7740515f462d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -14,6 +14,7 @@ 
 
 #include <drm/drm_crtc.h>
 #include <drm/drm_file.h>
+#include <drm/drm_vblank.h>
 #include <drm/drm_probe_helper.h>
 
 #include "msm_drv.h"
@@ -225,6 +226,66 @@  bool dpu_encoder_is_widebus_enabled(const struct drm_encoder *drm_enc)
 	return dpu_enc->wide_bus_en;
 }
 
+int dpu_encoder_get_num_phys(const struct drm_encoder *drm_enc)
+{
+	struct dpu_encoder_virt *dpu_enc;
+
+	dpu_enc = to_dpu_encoder_virt(drm_enc);
+
+	return dpu_enc->num_phys_encs;
+}
+
+void dpu_encoder_setup_misr(const struct drm_encoder *drm_enc)
+{
+	struct dpu_encoder_virt *dpu_enc;
+
+	int i;
+
+	dpu_enc = to_dpu_encoder_virt(drm_enc);
+
+	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
+		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
+
+		if (!phys->hw_intf || !phys->hw_intf->ops.setup_misr)
+			continue;
+
+		phys->hw_intf->ops.setup_misr(phys->hw_intf, true, 1);
+	}
+}
+
+int dpu_encoder_get_crc(const struct drm_encoder *drm_enc)
+{
+	struct dpu_encoder_virt *dpu_enc;
+	u32 crcs[MAX_PHYS_ENCODERS_PER_VIRTUAL];
+
+	int i, rc;
+
+	if (!drm_enc->crtc) {
+		DRM_ERROR("no crtc found for encoder %d\n", drm_enc->index);
+		return -EINVAL;
+	}
+
+	dpu_enc = to_dpu_encoder_virt(drm_enc);
+
+	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
+		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
+
+		if (!phys->hw_intf || !phys->hw_intf->ops.collect_misr)
+			continue;
+
+		rc = phys->hw_intf->ops.collect_misr(phys->hw_intf, &crcs[i]);
+
+		if (rc) {
+			if (rc != -ENODATA)
+				DRM_DEBUG_DRIVER("MISR read failed\n");
+			return rc;
+		}
+	}
+
+	return drm_crtc_add_crc_entry(drm_enc->crtc, true,
+			drm_crtc_accurate_vblank_count(drm_enc->crtc), crcs);
+}
+
 static void _dpu_encoder_setup_dither(struct dpu_hw_pingpong *hw_pp, unsigned bpc)
 {
 	struct dpu_hw_dither_cfg dither_cfg = { 0 };
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index 781d41c91994..8345599dd01a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -1,5 +1,6 @@ 
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
@@ -174,6 +175,27 @@  int dpu_encoder_get_vsync_count(struct drm_encoder *drm_enc);
 
 bool dpu_encoder_is_widebus_enabled(const struct drm_encoder *drm_enc);
 
+/**
+ * dpu_encoder_get_num_phys - get number of physical encoders contained in virtual
+ *                            encoder
+ * @drm_enc:    Pointer to previously created drm encoder structure
+ * Returns:	Number of physical encoders for given drm encoder
+ */
+int dpu_encoder_get_num_phys(const struct drm_encoder *drm_enc);
+
+/**
+ * dpu_encoder_setup_misr - enable misr calculations
+ * @drm_enc:    Pointer to previously created drm encoder structure
+ */
+void dpu_encoder_setup_misr(const struct drm_encoder *drm_encoder);
+
+/**
+ * dpu_encoder_get_crc - get the crc value from interface blocks
+ * @drm_enc:    Pointer to previously created drm encoder structure
+ * Returns:     0 on success, error otherwise
+ */
+int dpu_encoder_get_crc(const struct drm_encoder *drm_enc);
+
 /**
  * dpu_encoder_use_dsc_merge - returns true if the encoder uses DSC merge topology.
  * @drm_enc:    Pointer to previously created drm encoder structure