On 27/05/2022 21:54, Jessica Zhang wrote:
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@xxxxxxxxxxx>
---
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 --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);
Let's do this correctly from the beginning. The CRTC can drive several
encoders. Do we want to get CRC from all of them or just from the first one?
+
+ 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@xxxxxxxxx>
@@ -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;
Does WB support CRC?
+
+ 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]);
This doesn't look fully correct. Do we need to skip the indices for the
phys without a backing hw_intf?
+
Extra empty line.
+ if (rc) {
+ if (rc != -ENODATA)
Do we need to handle ENODATA in any specific way (like zeroing the
crcs[i])? If not, I'd suggest to drop this return code. Let's make an
error always an error.
+ 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@xxxxxxxxx>
@@ -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
--
With best wishes
Dmitry
