[PATCH v2 16/22] drm/msm/dpu: Configure CWB in writeback encoder
From: Jessica Zhang
Date: Tue Sep 24 2024 - 19:04:12 EST
Cache the CWB block mask in the DPU virtual encoder and configure CWB
according to the CWB block mask within the writeback phys encoder
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 83 +++++++++++++++++++++-
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 16 ++++-
.../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 4 +-
3 files changed, 100 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index b2f0bf412451..2628f2d55cb3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -24,6 +24,7 @@
#include "dpu_hw_catalog.h"
#include "dpu_hw_intf.h"
#include "dpu_hw_ctl.h"
+#include "dpu_hw_cwb.h"
#include "dpu_hw_dspp.h"
#include "dpu_hw_dsc.h"
#include "dpu_hw_merge3d.h"
@@ -139,6 +140,7 @@ enum dpu_enc_rc_states {
* num_phys_encs.
* @hw_dsc: Handle to the DSC blocks used for the display.
* @dsc_mask: Bitmask of used DSC blocks.
+ * @cwb_mask Bitmask of used CWB muxes
* @intfs_swapped: Whether or not the phys_enc interfaces have been swapped
* for partial update right-only cases, such as pingpong
* split where virtual pingpong does not generate IRQs
@@ -185,6 +187,7 @@ struct dpu_encoder_virt {
struct dpu_hw_dsc *hw_dsc[MAX_CHANNELS_PER_ENC];
unsigned int dsc_mask;
+ unsigned int cwb_mask;
bool intfs_swapped;
@@ -1063,6 +1066,7 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
int num_cwb = 0;
bool is_cwb_encoder;
unsigned int dsc_mask = 0;
+ unsigned int cwb_mask = 0;
int i;
if (!drm_enc) {
@@ -1103,8 +1107,12 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
ARRAY_SIZE(hw_pp));
}
- for (i = 0; i < num_cwb; i++)
+ for (i = 0; i < num_cwb; i++) {
dpu_enc->hw_cwb[i] = to_dpu_hw_cwb(hw_cwb[i]);
+ cwb_mask |= BIT(dpu_enc->hw_cwb[i]->idx - CWB_0);
+ }
+
+ dpu_enc->cwb_mask = cwb_mask;
dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state,
drm_enc->crtc, DPU_HW_BLK_CTL, hw_ctl, ARRAY_SIZE(hw_ctl));
@@ -2071,6 +2079,9 @@ void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc)
}
}
+ if (dpu_enc->cwb_mask)
+ dpu_encoder_helper_phys_setup_cwb(phys_enc, false);
+
/* reset the merge 3D HW block */
if (phys_enc->hw_pp && phys_enc->hw_pp->merge_3d) {
phys_enc->hw_pp->merge_3d->ops.setup_3d_mode(phys_enc->hw_pp->merge_3d,
@@ -2114,6 +2125,68 @@ void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc)
ctl->ops.clear_pending_flush(ctl);
}
+void dpu_encoder_helper_phys_setup_cwb(struct dpu_encoder_phys *phys_enc,
+ bool enable)
+{
+ struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(phys_enc->parent);
+ struct dpu_hw_cwb *hw_cwb;
+ struct dpu_hw_cwb_setup_cfg cwb_cfg;
+
+ struct dpu_kms *dpu_kms;
+ struct dpu_global_state *global_state;
+ struct dpu_hw_blk *rt_pp_list[MAX_CHANNELS_PER_ENC];
+ int num_pp, rt_pp_idx[MAX_CHANNELS_PER_ENC];
+
+ if (!phys_enc || !phys_enc->hw_wb || !dpu_enc->cwb_mask)
+ return;
+
+ dpu_kms = phys_enc->dpu_kms;
+ global_state = dpu_kms_get_existing_global_state(dpu_kms);
+ num_pp = dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state,
+ phys_enc->parent->crtc,
+ DPU_HW_BLK_PINGPONG, rt_pp_list,
+ ARRAY_SIZE(rt_pp_list));
+
+ if (num_pp == 0 || num_pp > MAX_CHANNELS_PER_ENC) {
+ DPU_DEBUG_ENC(dpu_enc, "invalid num_pp %d\n", num_pp);
+ return;
+ }
+
+ for (int i = 0; i < num_pp; i++) {
+ struct dpu_hw_pingpong *hw_pp = to_dpu_hw_pingpong(rt_pp_list[i]);
+
+ for (int j = 0; j < ARRAY_SIZE(dpu_enc->hw_cwb); j++) {
+ hw_cwb = dpu_enc->hw_cwb[i];
+
+ /*
+ * Even CWB muxes must take input from even real-time
+ * pingpongs and odd CWB muxes must take input from odd
+ * pingpongs
+ */
+ if (hw_pp->idx % 2 == hw_cwb->idx % 2) {
+ rt_pp_idx[i] = enable ? hw_pp->idx : PINGPONG_NONE;
+ break;
+ }
+ }
+ }
+
+ /*
+ * The CWB mux supports using LM or DSPP as tap points. For now,
+ * always use LM tap point
+ */
+ cwb_cfg.input = INPUT_MODE_LM_OUT;
+
+ for (int i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
+ hw_cwb = dpu_enc->hw_cwb[i];
+ if (!hw_cwb)
+ continue;
+
+ cwb_cfg.pp_idx = rt_pp_idx[i];
+
+ hw_cwb->ops.config_cwb(hw_cwb, &cwb_cfg);
+ }
+}
+
void dpu_encoder_helper_phys_setup_cdm(struct dpu_encoder_phys *phys_enc,
const struct msm_format *dpu_fmt,
u32 output_type)
@@ -2557,6 +2630,14 @@ enum dpu_intf_mode dpu_encoder_get_intf_mode(struct drm_encoder *encoder)
return INTF_MODE_NONE;
}
+unsigned int dpu_encoder_helper_get_cwb(struct dpu_encoder_phys *phys_enc)
+{
+ struct drm_encoder *encoder = phys_enc->parent;
+ struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(encoder);
+
+ return dpu_enc->cwb_mask;
+}
+
unsigned int dpu_encoder_helper_get_dsc(struct dpu_encoder_phys *phys_enc)
{
struct drm_encoder *encoder = phys_enc->parent;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index e77ebe3a68da..d7a02d1f8053 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
- * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2015-2018 The Linux Foundation. All rights reserved.
*/
@@ -331,6 +331,12 @@ static inline enum dpu_3d_blend_mode dpu_encoder_helper_get_3d_blend_mode(
return BLEND_3D_NONE;
}
+/**
+ * dpu_encoder_helper_get_cwb - get CWB blocks mask for the DPU encoder
+ * @phys_enc: Pointer to physical encoder structure
+ */
+unsigned int dpu_encoder_helper_get_cwb(struct dpu_encoder_phys *phys_enc);
+
/**
* dpu_encoder_helper_get_dsc - get DSC blocks mask for the DPU encoder
* This helper function is used by physical encoder to get DSC blocks mask
@@ -400,6 +406,14 @@ int dpu_encoder_helper_wait_for_irq(struct dpu_encoder_phys *phys_enc,
*/
void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc);
+/**
+ * dpu_encoder_helper_phys_setup_cwb - helper to configure CWB muxes
+ * @phys_enc: Pointer to physical encoder structure
+ * @enable: Enable CWB mux
+ */
+void dpu_encoder_helper_phys_setup_cwb(struct dpu_encoder_phys *phys_enc,
+ bool enable);
+
/**
* dpu_encoder_helper_phys_setup_cdm - setup chroma down sampling block
* @phys_enc: Pointer to physical encoder
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
index 882c717859ce..e88c4d91041f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__
@@ -342,6 +342,8 @@ static void dpu_encoder_phys_wb_setup(
dpu_encoder_helper_phys_setup_cdm(phys_enc, dpu_fmt, CDM_CDWN_OUTPUT_WB);
+ dpu_encoder_helper_phys_setup_cwb(phys_enc, true);
+
dpu_encoder_phys_wb_setup_ctl(phys_enc);
}
--
2.34.1