Re: [PATCH v1 1/5] drm/msm/dpu: add support for DSC encoder v1.2 engine
From: Kuogee Hsieh
Date: Wed Apr 26 2023 - 12:10:00 EST
On 4/20/2023 4:54 PM, Dmitry Baryshkov wrote:
On 21/04/2023 02:25, Kuogee Hsieh wrote:
Add support for DSC 1.2 by providing the necessary hooks to program
the DPU DSC 1.2 encoder.
Signed-off-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 38 ++-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h | 17 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c | 388
+++++++++++++++++++++++++
drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 7 +-
5 files changed, 444 insertions(+), 7 deletions(-)
create mode 100644 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index b814fc8..b9af5e4 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -65,6 +65,7 @@ msm-$(CONFIG_DRM_MSM_DPU) += \
disp/dpu1/dpu_hw_catalog.o \
disp/dpu1/dpu_hw_ctl.o \
disp/dpu1/dpu_hw_dsc.o \
+ disp/dpu1/dpu_hw_dsc_1_2.o \
disp/dpu1/dpu_hw_interrupts.o \
disp/dpu1/dpu_hw_intf.o \
disp/dpu1/dpu_hw_lm.o \
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index 71584cd..22421b9 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
- * Copyright (c) 2022. Qualcomm Innovation Center, Inc. All rights
reserved.
+ * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All
rights reserved.
* Copyright (c) 2015-2018, 2020 The Linux Foundation. All rights
reserved.
*/
@@ -241,12 +241,20 @@ enum {
};
/**
- * DSC features
- * @DPU_DSC_OUTPUT_CTRL Configure which PINGPONG block gets
- * the pixel output from this DSC.
+ * DSC sub-blocks/features
+ * @DPU_DSC_OUTPUT_CTRL Configure which PINGPONG block gets
+ * the pixel output from this DSC.
Any reason to change the alignment
+ * @DPU_DSC_HW_REV_1_1 DSC block supports dsc 1.1 only
+ * @DPU_DSC_HW_REV_1_2 DSC block supports dsc 1.1 and 1.2
+ * @DPU_DSC_NATIVE_422_EN Supports native422 and native420
encoding
+ * @DPU_DSC_MAX
*/
enum {
DPU_DSC_OUTPUT_CTRL = 0x1,
+ DPU_DSC_HW_REV_1_1,
+ DPU_DSC_HW_REV_1_2,
+ DPU_DSC_NATIVE_422_EN,
+ DPU_DSC_MAX
};
/**
@@ -311,6 +319,14 @@ struct dpu_pp_blk {
};
/**
+ * struct dpu_dsc_blk - DSC Encoder sub-blk information
+ * @info: HW register and features supported by this sub-blk
+ */
+struct dpu_dsc_blk {
+ DPU_HW_SUBBLK_INFO;
+};
+
+/**
* enum dpu_qos_lut_usage - define QoS LUT use cases
*/
enum dpu_qos_lut_usage {
@@ -459,6 +475,17 @@ struct dpu_pingpong_sub_blks {
};
/**
+ * struct dpu_dsc_sub_blks - DSC sub-blks
+ * @enc: DSC encoder sub block
+ * @ctl: DSC controller sub block
+ *
+ */
+struct dpu_dsc_sub_blks {
+ struct dpu_dsc_blk enc;
+ struct dpu_dsc_blk ctl;
+};
+
+/**
* dpu_clk_ctrl_type - Defines top level clock control signals
*/
enum dpu_clk_ctrl_type {
@@ -612,10 +639,13 @@ struct dpu_merge_3d_cfg {
* struct dpu_dsc_cfg - information of DSC blocks
* @id enum identifying this block
* @base register offset of this block
+ * @len: length of hardware block
* @features bit mask identifying sub-blocks/features
+ * @sblk sub-blocks information
*/
struct dpu_dsc_cfg {
DPU_HW_BLK_INFO;
+ const struct dpu_dsc_sub_blks *sblk;
};
/**
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
index ae9b5db..d0f8b8b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
@@ -1,5 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright (c) 2020-2022, Linaro Limited */
+/*
+ * Copyright (c) 2020-2022, Linaro Limited
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights
reserved
+ */
#ifndef _DPU_HW_DSC_H
#define _DPU_HW_DSC_H
@@ -61,7 +64,7 @@ struct dpu_hw_dsc {
};
/**
- * dpu_hw_dsc_init - initializes the dsc block for the passed dsc idx.
+ * dpu_hw_dsc_init - initializes the v1.1 dsc block for the passed
dsc idx.
* @idx: DSC index for which driver object is required
* @addr: Mapped register io address of MDP
* @m: Pointer to mdss catalog data
@@ -71,6 +74,16 @@ struct dpu_hw_dsc *dpu_hw_dsc_init(enum dpu_dsc
idx, void __iomem *addr,
const struct dpu_mdss_cfg *m);
/**
+ * dpu_hw_dsc_init_1_2 - initializes the v1.2 dsc block for the
passed dsc idx.
+ * @idx: DSC index for which driver object is required
+ * @addr: Mapped register io address of MDP
+ * @m: Pointer to mdss catalog data
+ * Returns: Error code or allocated dpu_hw_dsc context
+ */
+struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(enum dpu_dsc idx, void
__iomem *addr,
+ const struct dpu_mdss_cfg *m);
+
+/**
* dpu_hw_dsc_destroy - destroys dsc driver context
* @dsc: Pointer to dsc driver context returned by dpu_hw_dsc_init
*/
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
new file mode 100644
index 00000000..455d7f2
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights
reserved
+ */
+
+#include <drm/display/drm_dsc_helper.h>
+
+#include "dpu_kms.h"
+#include "dpu_hw_catalog.h"
+#include "dpu_hwio.h"
+#include "dpu_hw_mdss.h"
+#include "dpu_hw_dsc.h"
+
+
+#define DSC_CMN_MAIN_CNF 0x00
+
+/* DPU_DSC_ENC register offsets */
+#define ENC_DF_CTRL 0x00
+#define ENC_GENERAL_STATUS 0x04
+#define ENC_HSLICE_STATUS 0x08
+#define ENC_OUT_STATUS 0x0C
+#define ENC_INT_STAT 0x10
+#define ENC_INT_CLR 0x14
+#define ENC_INT_MASK 0x18
+#define DSC_MAIN_CONF 0x30
+#define DSC_PICTURE_SIZE 0x34
+#define DSC_SLICE_SIZE 0x38
+#define DSC_MISC_SIZE 0x3C
+#define DSC_HRD_DELAYS 0x40
+#define DSC_RC_SCALE 0x44
+#define DSC_RC_SCALE_INC_DEC 0x48
+#define DSC_RC_OFFSETS_1 0x4C
+#define DSC_RC_OFFSETS_2 0x50
+#define DSC_RC_OFFSETS_3 0x54
+#define DSC_RC_OFFSETS_4 0x58
+#define DSC_FLATNESS_QP 0x5C
+#define DSC_RC_MODEL_SIZE 0x60
+#define DSC_RC_CONFIG 0x64
+#define DSC_RC_BUF_THRESH_0 0x68
+#define DSC_RC_BUF_THRESH_1 0x6C
+#define DSC_RC_BUF_THRESH_2 0x70
+#define DSC_RC_BUF_THRESH_3 0x74
+#define DSC_RC_MIN_QP_0 0x78
+#define DSC_RC_MIN_QP_1 0x7C
+#define DSC_RC_MIN_QP_2 0x80
+#define DSC_RC_MAX_QP_0 0x84
+#define DSC_RC_MAX_QP_1 0x88
+#define DSC_RC_MAX_QP_2 0x8C
As you are adding new definitions, could please make them aligned from
the beginning?
+#define DSC_RC_RANGE_BPG_OFFSETS_0 0x90
+#define DSC_RC_RANGE_BPG_OFFSETS_1 0x94
+#define DSC_RC_RANGE_BPG_OFFSETS_2 0x98
+
+/* DPU_DSC_CTL register offsets */
+#define DSC_CTL 0x00
+#define DSC_CFG 0x04
+#define DSC_DATA_IN_SWAP 0x08
+#define DSC_CLK_CTRL 0x0C
+
+/*
+ * @DPU_DSC_ENC DSC encoder sub block
+ * @DPU_DSC_CTL DSC controller sub block
+ */
+enum {
+ DPU_DSC_ENC,
+ DPU_DSC_CTL,
+};
+
+static int _dsc_calc_ob_max_addr(struct dpu_hw_dsc *hw_dsc, int num_ss)
If this is used from a single place, please inline this function.
+{
+ int max_addr = 2400 / num_ss;
+
+ if (hw_dsc->caps->features & BIT(DPU_DSC_NATIVE_422_EN))
+ max_addr /= 2;
Is this really guarded by the hw block feature or by native_422 being
enabled?
+
+ return max_addr - 1;
+};
+
[skipped]
+static void dpu_hw_dsc_config_thresh_1_2(struct dpu_hw_dsc *hw_dsc,
+ struct drm_dsc_config *dsc)
+{
+ struct dpu_hw_blk_reg_map *hw;
+ u32 offset, off;
+ int i, j = 0;
+ struct drm_dsc_rc_range_parameters *rc;
+ u32 data = 0, min_qp = 0, max_qp = 0, bpg_off = 0;
+
+ if (!hw_dsc || !dsc)
+ return;
+
+ _dsc_subblk_offset(hw_dsc, DPU_DSC_ENC, &offset);
+
+ hw = &hw_dsc->hw;
+
+ rc = dsc->rc_range_params;
+
+ off = 0;
+ for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
+ data |= dsc->rc_buf_thresh[i] << (8 * j);
+ j++;
+ if ((j == 4) || (i == DSC_NUM_BUF_RANGES - 2)) {
+ DPU_REG_WRITE(hw, offset + DSC_RC_BUF_THRESH_0 + off,
+ data);
+ off += 4;
+ j = 0;
+ data = 0;
+ }
+ }
+
+ off = 0;
+ for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
+ min_qp |= rc[i].range_min_qp << (5 * j);
+ max_qp |= rc[i].range_max_qp << (5 * j);
+ bpg_off |= rc[i].range_bpg_offset << (6 * j);
+ j++;
+ if (j == 5) {
+ DPU_REG_WRITE(hw, offset + DSC_RC_MIN_QP_0 + off,
+ min_qp);
+ DPU_REG_WRITE(hw, offset + DSC_RC_MAX_QP_0 + off,
+ max_qp);
+ DPU_REG_WRITE(hw,
+ offset + DSC_RC_RANGE_BPG_OFFSETS_0 + off,
+ bpg_off);
+ off += 4;
+ j = 0;
+ min_qp = 0;
+ max_qp = 0;
+ bpg_off = 0;
+ }
+ }
Unrolling these loops would make it easier to understand them.
it is kind of difficult to unrolling the for loop.
I will add comments to explain the loop.
+}
+
+static void dpu_hw_dsc_bind_pingpong_blk_1_2(
+ struct dpu_hw_dsc *hw_dsc,
+ bool enable,
+ const enum dpu_pingpong pp)
+{
+ struct dpu_hw_blk_reg_map *hw;
+ int offset;
+ int mux_cfg = 0xf; /* Disabled */
+
+ _dsc_subblk_offset(hw_dsc, DPU_DSC_CTL, &offset);
+
+ hw = &hw_dsc->hw;
+ if (enable)
+ mux_cfg = (pp - PINGPONG_0) & 0x7;
+
+ DPU_REG_WRITE(hw, offset + DSC_CTL, mux_cfg);
+}
+
+static const struct dpu_dsc_cfg *_dsc_offset(enum dpu_dsc dsc,
+ const struct dpu_mdss_cfg *m,
+ void __iomem *addr,
+ struct dpu_hw_blk_reg_map *b)
+{
+ int i;
+
+ for (i = 0; i < m->dsc_count; i++) {
+ if (dsc == m->dsc[i].id) {
+ b->blk_addr = addr + m->dsc[i].base;
+ b->log_mask = DPU_DBG_MASK_DSC;
+ return &m->dsc[i];
+ }
+ }
+
+ return NULL;
+}
+
+static void _setup_dcs_ops_1_2(struct dpu_hw_dsc_ops *ops,
+ const unsigned long features)
+{
+ ops->dsc_disable = dpu_hw_dsc_disable_1_2;
+ ops->dsc_config = dpu_hw_dsc_config_1_2;
+ ops->dsc_config_thresh = dpu_hw_dsc_config_thresh_1_2;
+ ops->dsc_bind_pingpong_blk = dpu_hw_dsc_bind_pingpong_blk_1_2;
+}
+
+struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(enum dpu_dsc idx, void
__iomem *addr,
+ const struct dpu_mdss_cfg *m)
+{
Please rebase on top of https://patchwork.freedesktop.org/series/116615/
+ struct dpu_hw_dsc *c;
+ const struct dpu_dsc_cfg *cfg;
+
+ c = kzalloc(sizeof(*c), GFP_KERNEL);
+ if (!c)
+ return ERR_PTR(-ENOMEM);
+
+ cfg = _dsc_offset(idx, m, addr, &c->hw);
+ if (IS_ERR_OR_NULL(cfg)) {
+ kfree(c);
+ return ERR_PTR(-EINVAL);
+ }
+
+ c->idx = idx;
+ c->caps = cfg;
+
+ _setup_dcs_ops_1_2(&c->ops, c->caps->features);
+
+ return c;
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index f4dda88..f7014f5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights
reserved.
*/
#define pr_fmt(fmt) "[drm:%s] " fmt, __func__
@@ -250,7 +251,11 @@ int dpu_rm_init(struct dpu_rm *rm,
struct dpu_hw_dsc *hw;
const struct dpu_dsc_cfg *dsc = &cat->dsc[i];
- hw = dpu_hw_dsc_init(dsc->id, mmio, cat);
+ if (test_bit(DPU_DSC_HW_REV_1_2, &dsc->features))
+ hw = dpu_hw_dsc_init_1_2(dsc->id, mmio, cat);
+ else
+ hw = dpu_hw_dsc_init(dsc->id, mmio, cat);
+
if (IS_ERR_OR_NULL(hw)) {
rc = PTR_ERR(hw);
DPU_ERROR("failed dsc object creation: err %d\n", rc);