[PATCH v1 10/14] drm/msm/disp/dpu: add supports of DSC encoder v1.2 engine
Kuogee Hsieh
quic_khsieh at quicinc.com
Tue Jan 24 23:52:46 UTC 2023
On 1/23/2023 12:11 PM, Marijn Suijten wrote:
> add support for*
>
> drm/msm/dpu*
>
> On 2023-01-23 10:24:30, Kuogee Hsieh wrote:
>> DSC V1.2 encoder engine is newly added hardware module. This patch
>> add support functions to configure and enable DSC V1.2 encoder engine.
>>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh at quicinc.com>
>> ---
>> drivers/gpu/drm/msm/Makefile | 1 +
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 +-
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 60 +++-
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 23 +-
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h | 23 +-
>> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c | 371 +++++++++++++++++++++++++
>> 6 files changed, 463 insertions(+), 17 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 28cf52b..271c29a15 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_dsc_helper.o \
>> disp/dpu1/dpu_hw_interrupts.o \
>> disp/dpu1/dpu_hw_intf.o \
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> index 7f4a439..901e317 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> @@ -1821,7 +1821,7 @@ static void dpu_encoder_dsc_pipe_cfg(struct dpu_hw_dsc *hw_dsc,
>> u32 initial_lines)
>> {
>> if (hw_dsc->ops.dsc_config)
>> - hw_dsc->ops.dsc_config(hw_dsc, dsc, common_mode, initial_lines);
>> + hw_dsc->ops.dsc_config(hw_dsc, dsc, common_mode, initial_lines, false);
> As usual, an enum is better: readers have no idea what a free-floating
> bool means.
>
>>
>> if (hw_dsc->ops.dsc_config_thresh)
>> hw_dsc->ops.dsc_config_thresh(hw_dsc, dsc);
>> 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 978e3bd..7b0b092 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.
>> */
>>
>> @@ -11,6 +11,7 @@
>> #include <linux/bug.h>
>> #include <linux/bitmap.h>
>> #include <linux/err.h>
>> +#include "dpu_hw_mdss.h"
> Unused if you remove the unused DECLARE_BITMAP(dsc_pair_mask, DSC_MAX).
>
>>
>> /**
>> * Max hardware block count: For ex: max 12 SSPP pipes or
>> @@ -182,6 +183,7 @@ enum {
>> * @DPU_PINGPONG_TE2 Additional tear check block for split pipes
>> * @DPU_PINGPONG_SPLIT PP block supports split fifo
>> * @DPU_PINGPONG_SLAVE PP block is a suitable slave for split fifo
>> + * @DPU_PINGPONG_DSC, Display stream compression blocks
>> * @DPU_PINGPONG_DITHER, Dither blocks
>> * @DPU_PINGPONG_MAX
>> */
>> @@ -190,10 +192,32 @@ enum {
>> DPU_PINGPONG_TE2,
>> DPU_PINGPONG_SPLIT,
>> DPU_PINGPONG_SLAVE,
>> + DPU_PINGPONG_DSC,
> This is not used.
>
>> DPU_PINGPONG_DITHER,
>> DPU_PINGPONG_MAX
>> };
>>
>> +
>> +/** DSC sub-blocks/features
> Newline between /** and the text.
>
>> + * @DPU_DSC_OUTPUT_CTRL Supports the control of the pp id which gets
>> + * the pixel output from this DSC.
> The original comment is much more concise, can we keep it?
>
>> + * @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
> Capitalize DSC just like elsewhere.
>
>> + * @DPU_DSC_NATIVE_422_EN, Supports native422 and native420 encoding
>> + * @DPU_DSC_ENC, DSC encoder sub block
>> + * @DPU_DSC_CTL, DSC ctl sub block
> No need for trailing commas in doc comments; if anything replace them
> with colons?
>
>> + * @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_ENC,
>> + DPU_DSC_CTL,
> These two enum values only have a meaning within the dpu_hw_dsc_1_2.c
> file, and have nothing to do with the other feature flags/block
> description. Please move them there (and give _dsc_subblk_offset a
> proper enum type).
>
>> + DPU_DSC_MAX
>> +};
>> +
>> /**
>> * CTL sub-blocks
>> * @DPU_CTL_SPLIT_DISPLAY: CTL supports video mode split display
>> @@ -276,15 +300,6 @@ enum {
>> };
>>
>> /**
>> - * DSC features
>> - * @DPU_DSC_OUTPUT_CTRL Configure which PINGPONG block gets
>> - * the pixel output from this DSC.
>> - */
>> -enum {
>> - DPU_DSC_OUTPUT_CTRL = 0x1,
> Did this have to move?
>
>> -};
>> -
>> -/**
>> * MACRO DPU_HW_BLK_INFO - information of HW blocks inside DPU
>> * @name: string name for debug purposes
>> * @id: enum identifying this block
>> @@ -346,6 +361,14 @@ struct dpu_pp_blk {
>> };
>>
>> /**
>> + * struct dpu_dsc_blk : DSC Encoder sub-blk information
> Use a hyphen here and everywhere else:
> https://docs.kernel.org/doc-guide/kernel-doc.html
>
>> + * @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 {
>> @@ -403,6 +426,7 @@ struct dpu_rotation_cfg {
>> * @pixel_ram_size size of latency hiding and de-tiling buffer in bytes
>> * @max_hdeci_exp max horizontal decimation supported (max is 2^value)
>> * @max_vdeci_exp max vertical decimation supported (max is 2^value)
>> + * @max_dsc_width max dsc line width support.
> DSC*
>
>> */
>> struct dpu_caps {
>> u32 max_mixer_width;
>> @@ -419,6 +443,7 @@ struct dpu_caps {
>> u32 pixel_ram_size;
>> u32 max_hdeci_exp;
>> u32 max_vdeci_exp;
>> + u32 max_dsc_width;
> This is never read.
>
>> };
>>
>> /**
>> @@ -494,9 +519,20 @@ struct dpu_dspp_sub_blks {
>> struct dpu_pingpong_sub_blks {
>> struct dpu_pp_blk te;
>> struct dpu_pp_blk te2;
>> + struct dpu_pp_blk dsc;
> Unused.
>
>> struct dpu_pp_blk dither;
>> };
>>
>> +
>> +/**
>> + * struct dpu_dsc_sub_blks : DSC sub-blks
>> + *
> A sub-block of sub-blocks? Use the documentation to explain what this
> is for, describe @enc and @ctl.
>
>> + */
>> +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
>> */
>> @@ -641,10 +677,14 @@ 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
>> + * @dsc_pair_mask: Bitmask of DSCs that can be controlled by same CTL
>> */
>> struct dpu_dsc_cfg {
>> DPU_HW_BLK_INFO;
>> + DECLARE_BITMAP(dsc_pair_mask, DSC_MAX);
> This bitmask is unused.
>
>> + const struct dpu_dsc_sub_blks *sblk;
>> };
>>
>> /**
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c
>> index 619926d..51e8890 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c
>> @@ -1,6 +1,7 @@
>> // SPDX-License-Identifier: GPL-2.0-only
>> /*
>> * Copyright (c) 2020-2022, Linaro Limited
>> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved
>> */
>>
>> #include "dpu_kms.h"
>> @@ -41,10 +42,11 @@ static void dpu_hw_dsc_disable(struct dpu_hw_dsc *dsc)
>> static void dpu_hw_dsc_config(struct dpu_hw_dsc *hw_dsc,
>> struct drm_dsc_config *dsc,
>> u32 mode,
>> - u32 initial_lines)
>> + u32 initial_lines,
>> + bool ich_reset_override)
>> {
>> struct dpu_hw_blk_reg_map *c = &hw_dsc->hw;
>> - u32 data;
>> + u32 data, lsb, bpp;
>> u32 slice_last_group_size;
>> u32 det_thresh_flatness;
>> bool is_cmd_mode = !(mode & DSC_MODE_VIDEO);
>> @@ -58,7 +60,14 @@ static void dpu_hw_dsc_config(struct dpu_hw_dsc *hw_dsc,
>> data = (initial_lines << 20);
>> data |= ((slice_last_group_size - 1) << 18);
>> /* bpp is 6.4 format, 4 LSBs bits are for fractional part */
>> - data |= (dsc->bits_per_pixel << 8);
>> + data |= dsc->bits_per_pixel << 12;
>> + lsb = dsc->bits_per_pixel % 4;
>> + bpp = dsc->bits_per_pixel / 4;
>> + bpp *= 4;
>> + bpp <<= 4;
>> + bpp |= lsb;
>> +
>> + data |= bpp << 8;
> Why are you re-adding this nonsense? It was removed in [1] _and_ does
> not account for bits_per_pixel _already being in x.4 format_. This will
> regress existing hardware.
>
> [1]: https://lore.kernel.org/linux-arm-msm/20221026182824.876933-10-marijn.suijten@somainline.org/
>
>> data |= (dsc->block_pred_enable << 7);
>> data |= (dsc->line_buf_depth << 3);
>> data |= (dsc->simple_422 << 2);
>> @@ -221,7 +230,13 @@ struct dpu_hw_dsc *dpu_hw_dsc_init(enum dpu_dsc idx, void __iomem *addr,
>>
>> c->idx = idx;
>> c->caps = cfg;
>> - _setup_dsc_ops(&c->ops, c->caps->features);
>> +
>> + if (test_bit(DPU_DSC_HW_REV_1_1, &c->caps->features))
>> + _setup_dsc_ops(&c->ops, c->caps->features);
>> + else if (test_bit(DPU_DSC_HW_REV_1_2, &c->caps->features))
>> + dpu_dsc_1_2_setup_ops(&c->ops, c->caps->features);
>> + else
>> + _setup_dsc_ops(&c->ops, c->caps->features);
>>
>> return c;
>> }
>> 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..a48f572 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
>> @@ -33,7 +36,8 @@ struct dpu_hw_dsc_ops {
>> void (*dsc_config)(struct dpu_hw_dsc *hw_dsc,
>> struct drm_dsc_config *dsc,
>> u32 mode,
>> - u32 initial_lines);
>> + u32 initial_lines,
>> + bool ich_reset_override);
>>
>> /**
>> * dsc_config_thresh - programs panel thresholds
>> @@ -43,6 +47,12 @@ struct dpu_hw_dsc_ops {
>> void (*dsc_config_thresh)(struct dpu_hw_dsc *hw_dsc,
>> struct drm_dsc_config *dsc);
>>
>> + /**
>> + * bind_pingpong_blk - enable/disable the connection with pp
> Inherit docs from the enum.
>
>> + * @hw_dsc: Pointer to dsc context
> DSC*
>
>> + * @enable: enable/disable connection
>> + * @pp: pingpong blk id
> It's documentation, write out block fully.
>
>> + */
>> void (*dsc_bind_pingpong_blk)(struct dpu_hw_dsc *hw_dsc,
>> bool enable,
>> enum dpu_pingpong pp);
>> @@ -51,6 +61,7 @@ struct dpu_hw_dsc_ops {
>> struct dpu_hw_dsc {
>> struct dpu_hw_blk base;
>> struct dpu_hw_blk_reg_map hw;
>> + struct dpu_hw_ctl *hw_ctl;
> Unused.
>
>>
>> /* dsc */
>> enum dpu_dsc idx;
>> @@ -76,9 +87,17 @@ struct dpu_hw_dsc *dpu_hw_dsc_init(enum dpu_dsc idx, void __iomem *addr,
>> */
>> void dpu_hw_dsc_destroy(struct dpu_hw_dsc *dsc);
>>
>> +/**
>> + * dpu_hw_dsc - convert base object dpu_hw_base to container
>> + * @hw: Pointer to base hardware block
>> + * return: Pointer to hardware block container
>> + */
>> static inline struct dpu_hw_dsc *to_dpu_hw_dsc(struct dpu_hw_blk *hw)
>> {
>> return container_of(hw, struct dpu_hw_dsc, base);
>> }
>>
>> +void dpu_dsc_1_2_setup_ops(struct dpu_hw_dsc_ops *ops,
>> + const unsigned long features);
>> +
>> #endif /* _DPU_HW_DSC_H */
>> 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..2be74ae
>> --- /dev/null
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
>> @@ -0,0 +1,371 @@
>> +// 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 "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
>> +#define DSC_RC_RANGE_BPG_OFFSETS_0 0x90
>> +#define DSC_RC_RANGE_BPG_OFFSETS_1 0x94
>> +#define DSC_RC_RANGE_BPG_OFFSETS_2 0x98
> Reindent to line this back up.
>
>> +
>> +/* DPU_DSC_CTL register offsets */
>> +#define DSC_CTL 0x00
>> +#define DSC_CFG 0x04
>> +#define DSC_DATA_IN_SWAP 0x08
>> +#define DSC_CLK_CTRL 0x0C
>> +
>> +
>> +static int _dsc_calc_ob_max_addr(struct dpu_hw_dsc *hw_dsc, int num_ss)
>> +{
>> + enum dpu_dsc idx;
>> +
>> + idx = hw_dsc->idx;
>> +
>> + if (!(hw_dsc->caps->features & BIT(DPU_DSC_NATIVE_422_EN))) {
> Why not swap the bodies instead of inverting this.
>
>> + if (num_ss == 1)
>> + return 2399;
>> + else if (num_ss == 2)
>> + return 1199;
>> + } else {
>> + if (num_ss == 1)
>> + return 1199;
>> + else if (num_ss == 2)
>> + return 599;
>> + }
>> + return 0;
>> +}
>> +
>> +static inline int _dsc_subblk_offset(struct dpu_hw_dsc *hw_dsc, int s_id,
>> + u32 *idx)
>> +{
>> + const struct dpu_dsc_sub_blks *sblk;
>> +
>> + if (!hw_dsc)
>> + return -EINVAL;
>> +
>> + *idx = 0;
>> +
>> + sblk = hw_dsc->caps->sblk;
>> +
>> + switch (s_id) {
>> +
>> + case DPU_DSC_ENC:
>> + *idx = sblk->enc.base;
>> + break;
>> + case DPU_DSC_CTL:
>> + *idx = sblk->ctl.base;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void dpu_hw_dsc_disable_1_2(struct dpu_hw_dsc *hw_dsc)
>> +{
>> + struct dpu_hw_blk_reg_map *hw;
>> + u32 idx;
> Can we rename these to offset or subblk_offset or something more clear?
>
>> +
>> + if (!hw_dsc)
>> + return;
>> +
>> + if (_dsc_subblk_offset(hw_dsc, DPU_DSC_CTL, &idx))
>> + return;
> These error checks are excessive: you pass in a non-null hw_dsc and
> known enum constant - _dsc_subblk_offset should perhaps not return
> errors at all.
>
>> +
>> + hw = &hw_dsc->hw;
>> + DPU_REG_WRITE(hw, DSC_CFG + idx, 0);
> Swap the arguments to + so that it's clear that DSC_CFG is a register on
> the subblock offset denoted by "idx", not the other way around.
>
>> +
>> + if (_dsc_subblk_offset(hw_dsc, DPU_DSC_ENC, &idx))
>> + return;
>> +
>> + DPU_REG_WRITE(hw, ENC_DF_CTRL + idx, 0);
>> + DPU_REG_WRITE(hw, DSC_MAIN_CONF + idx, 0);
>> +}
>> +
>> +static void dpu_hw_dsc_config_1_2(struct dpu_hw_dsc *hw_dsc,
>> + struct drm_dsc_config *dsc, u32 mode,
>> + u32 initial_lines, bool ich_reset_override)
>> +{
>> + struct dpu_hw_blk_reg_map *hw;
>> + struct msm_display_dsc_info *dsc_info;
>> + u32 idx;
>> + u32 data = 0;
>> + u32 bpp;
>> + void __iomem *off;
>> +
>> + if (!hw_dsc || !dsc)
>> + return;
>> +
>> + hw = &hw_dsc->hw;
>> +
>> + dsc_info = to_msm_dsc_info(dsc);
>> +
>> + if (_dsc_subblk_offset(hw_dsc, DPU_DSC_ENC, &idx))
>> + return;
>> +
>> + if (mode & DSC_MODE_SPLIT_PANEL)
>> + data |= BIT(0);
>> +
>> + if (mode & DSC_MODE_MULTIPLEX)
>> + data |= BIT(1);
> These are well known bitwise definitions for a reason, data |= mode will
> do (or out DSC_MODE_VIDEO since you have to shift that one at BIT(9).
>
>> +
>> + data |= (dsc_info->num_active_ss_per_enc & 0x3) << 7;
>> +
>> + DPU_REG_WRITE(hw, DSC_CMN_MAIN_CNF, data);
>> +
>> + data = (dsc_info->initial_lines & 0xff);
> You already get initial_lines passed as function argument, but ignore
> it?
>
>> + data |= ((mode & DSC_MODE_VIDEO) ? 1 : 0) << 9;
> Yuck. if (mode & DSC_MODE_VIDEO) data |= BIT(9);.
>
>> + if (ich_reset_override)
>> + data |= 0xC00; // set bit 10 and 11
> Instead of a comment, make this self-describing BIT(10) | BIT(11) code.
>
>> + data |= (_dsc_calc_ob_max_addr(hw_dsc, dsc_info->num_active_ss_per_enc) << 18);
>> +
>> + DPU_REG_WRITE(hw, ENC_DF_CTRL + idx, data);
>> +
>> + data = (dsc->dsc_version_minor & 0xf) << 28;
>> + if (dsc->dsc_version_minor == 0x2) {
>> + if (dsc->native_422)
>> + data |= BIT(22);
>> + if (dsc->native_420)
>> + data |= BIT(21);
>> + }
>> +
>> + bpp = dsc->bits_per_pixel;
> As above, don't forget to read the documentation on this field:
>
> Target bits per pixel with 4 fractional bits, bits_per_pixel << 4
>
>> + /* as per hw requirement bpp should be programmed
>> + * twice the actual value in case of 420 or 422 encoding
>> + */
>> + if (dsc->native_422 || dsc->native_420)
>> + bpp = 2 * bpp;
>> + data |= (dsc->block_pred_enable ? 1 : 0) << 20;
>> + data |= (bpp << 10);
> Either wrap everything or nothing in ().
>
>> + data |= (dsc->line_buf_depth & 0xf) << 6;
>> + data |= dsc->convert_rgb << 4;
>> + data |= dsc->bits_per_component & 0xf;
>> +
>> + DPU_REG_WRITE(hw, DSC_MAIN_CONF + idx, data);
>> +
>> + data = (dsc->pic_width & 0xffff) |
>> + ((dsc->pic_height & 0xffff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_PICTURE_SIZE + idx, data);
>> +
>> + data = (dsc->slice_width & 0xffff) |
>> + ((dsc->slice_height & 0xffff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_SLICE_SIZE + idx, data);
>> +
>> + DPU_REG_WRITE(hw, DSC_MISC_SIZE + idx,
>> + (dsc->slice_chunk_size) & 0xffff);
>> +
>> + data = (dsc->initial_xmit_delay & 0xffff) |
>> + ((dsc->initial_dec_delay & 0xffff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_HRD_DELAYS + idx, data);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_SCALE + idx,
>> + dsc->initial_scale_value & 0x3f);
>> +
>> + data = (dsc->scale_increment_interval & 0xffff) |
>> + ((dsc->scale_decrement_interval & 0x7ff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_SCALE_INC_DEC + idx, data);
>> +
>> + data = (dsc->first_line_bpg_offset & 0x1f) |
>> + ((dsc->second_line_bpg_offset & 0x1f) << 5);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_OFFSETS_1 + idx, data);
>> +
>> + data = (dsc->nfl_bpg_offset & 0xffff) |
>> + ((dsc->slice_bpg_offset & 0xffff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_OFFSETS_2 + idx, data);
>> +
>> + data = (dsc->initial_offset & 0xffff) |
>> + ((dsc->final_offset & 0xffff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_OFFSETS_3 + idx, data);
>> +
>> + data = (dsc->nsl_bpg_offset & 0xffff) |
>> + ((dsc->second_line_offset_adj & 0xffff) << 16);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_OFFSETS_4 + idx, data);
>> +
>> + data = (dsc->flatness_min_qp & 0x1f);
>> + data |= (dsc->flatness_max_qp & 0x1f) << 5;
>> + data |= (dsc_info->det_thresh_flatness & 0xff) << 10;
> dpu_hw_dsc.c computes this on the fly. After removing that, and
> using initial_lines from the function parameters, only
> dsc_info->num_active_ss_per_enc remains. Do you really need that
> msm_display_dsc_info struct here, do you need it at all?
I ported these code from our down stream code base.
I make it work first, then clean it up will follow.
I submit it for review since it looks like you guy like to have code sooner.
yes, eliminate msm_display_dsc_info is my next target and hope it can be
done.
>
>> +
>> + DPU_REG_WRITE(hw, DSC_FLATNESS_QP + idx, data);
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_MODEL_SIZE + idx,
>> + (dsc->rc_model_size) & 0xffff);
>> +
>> + data = dsc->rc_edge_factor & 0xf;
>> + data |= (dsc->rc_quant_incr_limit0 & 0x1f) << 8;
>> + data |= (dsc->rc_quant_incr_limit1 & 0x1f) << 13;
>> + data |= (dsc->rc_tgt_offset_high & 0xf) << 20;
>> + data |= (dsc->rc_tgt_offset_low & 0xf) << 24;
>> +
>> + DPU_REG_WRITE(hw, DSC_RC_CONFIG + idx, data);
>> +
>> + /* program the dsc wrapper */
>> + if (_dsc_subblk_offset(hw_dsc, DPU_DSC_CTL, &idx))
>> + return;
>> +
>> + off = hw->blk_addr + idx;
>> +
>> + data = BIT(0); /* encoder enable */
>> + if (dsc->native_422)
>> + data |= BIT(8);
>> + else if (dsc->native_420)
>> + data |= BIT(9);
>> + if (!dsc->convert_rgb)
>> + data |= BIT(10);
>> + if (dsc->bits_per_component == 8)
>> + data |= BIT(11);
>> + if (mode & DSC_MODE_SPLIT_PANEL)
>> + data |= BIT(12);
>> + if (mode & DSC_MODE_MULTIPLEX)
>> + data |= BIT(13);
>> + if (!(mode & DSC_MODE_VIDEO))
>> + data |= BIT(17);
>> +
>> + if (dsc_info->dsc_4hsmerge_en) {
>> + data |= dsc_info->dsc_4hsmerge_padding << 18;
>> + data |= dsc_info->dsc_4hsmerge_alignment << 22;
>> + data |= BIT(16);
>> + }
>> +
>> + DPU_REG_WRITE(hw, DSC_CFG + idx, data);
>> +
>> +// DPU_REG_WRITE(hw, DSC_DATA_IN_SWAP + idx, 0x14e5);
> No commented-out code please, especially not with //
>
>> +}
>> +
>> +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;
>> + struct msm_display_dsc_info *dsc_info;
>> + u32 idx, 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;
>> +
>> + if (_dsc_subblk_offset(hw_dsc, DPU_DSC_ENC, &idx))
>> + return;
>> +
>> + hw = &hw_dsc->hw;
>> +
>> + dsc_info = to_msm_dsc_info(dsc);
>> +
>> + 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);
> Lack of spaces does not make this multiplication any prettier to read.
>
> * has precedence over << but it's better to replicate the () below as
> well.
>
>> + j++;
>> + if ((j == 4) || (i == DSC_NUM_BUF_RANGES - 2)) {
>> + DPU_REG_WRITE(hw, DSC_RC_BUF_THRESH_0 + idx + 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 & 0x1f) << 5*j;
>> + max_qp |= (rc[i].range_max_qp & 0x1f) << 5*j;
>> + bpg_off |= (rc[i].range_bpg_offset & 0x3f) << 6*j;
> These values _must_ already be masked to be useful in
> drm_dsc_compute_rc_parameters(), no need to mask them again just like
> the v1.1 block implementation.
>
>> + j++;
>> + if (j == 5) {
>> + DPU_REG_WRITE(hw, DSC_RC_MIN_QP_0 + idx + off,
>> + min_qp);
>> + DPU_REG_WRITE(hw, DSC_RC_MAX_QP_0 + idx + off,
>> + max_qp);
>> + DPU_REG_WRITE(hw,
>> + DSC_RC_RANGE_BPG_OFFSETS_0 + idx + off,
>> + bpg_off);
>> + off += 4;
>> + j = 0;
>> + min_qp = 0;
>> + max_qp = 0;
>> + bpg_off = 0;
>> + }
>> + }
>> +}
>> +
>> +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 idx;
>> + int mux_cfg = 0xF; /* Disabled */
> Lowercase hex (and anywhere else if I skipped any).
>
>> +
>> + if (!hw_dsc)
>> + return;
> As with the v1.1 implementation, we don't check this, and your function
> below also checks it (but it does not need to).
>
>> + if (_dsc_subblk_offset(hw_dsc, DPU_DSC_CTL, &idx))
>> + return;
>> +
>> + hw = &hw_dsc->hw;
>> + if (enable)
>> + mux_cfg = (pp - PINGPONG_0) & 0x7;
>> +
>> + DPU_REG_WRITE(hw, DSC_CTL + idx, mux_cfg);
>> +}
>> +
>> +void dpu_dsc_1_2_setup_ops(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;
>> +}
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
>> a Linux Foundation Collaborative Project
>>
> All in all you really need to revise and clean your patches before
> sending them to the lists; these are already far too many comments and
> nits, and massively take away from reviewing code behaviour which I have
> not even started with after looking at 1 out of 14 patches :(
>
> - Marijn
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