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drm/msm/dpu: add dpu_hw_wb abstraction for writeback blocks
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Add the dpu_hw_wb abstraction to program registers related to the
writeback block. These will be invoked once all the configuration
is set and ready to be programmed to the registers.

changes in v3:
	- start using the common struct dpu_hw_cdp_cfg
	- leave a comment about DPU non-DPU_WB_QOS_8LVL chipsets

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/483505/
Link: https://lore.kernel.org/r/1650984096-9964-7-git-send-email-quic_abhinavk@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
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Abhinav Kumar authored and Dmitry Baryshkov committed May 1, 2022
1 parent 786de93 commit 84a33d0
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1 change: 1 addition & 0 deletions drivers/gpu/drm/msm/Makefile
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Expand Up @@ -74,6 +74,7 @@ msm-$(CONFIG_DRM_MSM_DPU) += \
disp/dpu1/dpu_hw_top.o \
disp/dpu1/dpu_hw_util.o \
disp/dpu1/dpu_hw_vbif.o \
disp/dpu1/dpu_hw_wb.o \
disp/dpu1/dpu_kms.o \
disp/dpu1/dpu_plane.o \
disp/dpu1/dpu_rm.o \
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279 changes: 279 additions & 0 deletions drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
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@@ -0,0 +1,279 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved
*/

#include "dpu_hw_mdss.h"
#include "dpu_hwio.h"
#include "dpu_hw_catalog.h"
#include "dpu_hw_wb.h"
#include "dpu_formats.h"
#include "dpu_kms.h"

#define WB_DST_FORMAT 0x000
#define WB_DST_OP_MODE 0x004
#define WB_DST_PACK_PATTERN 0x008
#define WB_DST0_ADDR 0x00C
#define WB_DST1_ADDR 0x010
#define WB_DST2_ADDR 0x014
#define WB_DST3_ADDR 0x018
#define WB_DST_YSTRIDE0 0x01C
#define WB_DST_YSTRIDE1 0x020
#define WB_DST_YSTRIDE1 0x020
#define WB_DST_DITHER_BITDEPTH 0x024
#define WB_DST_MATRIX_ROW0 0x030
#define WB_DST_MATRIX_ROW1 0x034
#define WB_DST_MATRIX_ROW2 0x038
#define WB_DST_MATRIX_ROW3 0x03C
#define WB_DST_WRITE_CONFIG 0x048
#define WB_ROTATION_DNSCALER 0x050
#define WB_ROTATOR_PIPE_DOWNSCALER 0x054
#define WB_N16_INIT_PHASE_X_C03 0x060
#define WB_N16_INIT_PHASE_X_C12 0x064
#define WB_N16_INIT_PHASE_Y_C03 0x068
#define WB_N16_INIT_PHASE_Y_C12 0x06C
#define WB_OUT_SIZE 0x074
#define WB_ALPHA_X_VALUE 0x078
#define WB_DANGER_LUT 0x084
#define WB_SAFE_LUT 0x088
#define WB_QOS_CTRL 0x090
#define WB_CREQ_LUT_0 0x098
#define WB_CREQ_LUT_1 0x09C
#define WB_UBWC_STATIC_CTRL 0x144
#define WB_MUX 0x150
#define WB_CROP_CTRL 0x154
#define WB_CROP_OFFSET 0x158
#define WB_CSC_BASE 0x260
#define WB_DST_ADDR_SW_STATUS 0x2B0
#define WB_CDP_CNTL 0x2B4
#define WB_OUT_IMAGE_SIZE 0x2C0
#define WB_OUT_XY 0x2C4

/* WB_QOS_CTRL */
#define WB_QOS_CTRL_DANGER_SAFE_EN BIT(0)

static const struct dpu_wb_cfg *_wb_offset(enum dpu_wb wb,
const struct dpu_mdss_cfg *m, void __iomem *addr,
struct dpu_hw_blk_reg_map *b)
{
int i;

for (i = 0; i < m->wb_count; i++) {
if (wb == m->wb[i].id) {
b->base_off = addr;
b->blk_off = m->wb[i].base;
b->length = m->wb[i].len;
b->hwversion = m->hwversion;
return &m->wb[i];
}
}
return ERR_PTR(-EINVAL);
}

static void dpu_hw_wb_setup_outaddress(struct dpu_hw_wb *ctx,
struct dpu_hw_wb_cfg *data)
{
struct dpu_hw_blk_reg_map *c = &ctx->hw;

DPU_REG_WRITE(c, WB_DST0_ADDR, data->dest.plane_addr[0]);
DPU_REG_WRITE(c, WB_DST1_ADDR, data->dest.plane_addr[1]);
DPU_REG_WRITE(c, WB_DST2_ADDR, data->dest.plane_addr[2]);
DPU_REG_WRITE(c, WB_DST3_ADDR, data->dest.plane_addr[3]);
}

static void dpu_hw_wb_setup_format(struct dpu_hw_wb *ctx,
struct dpu_hw_wb_cfg *data)
{
struct dpu_hw_blk_reg_map *c = &ctx->hw;
const struct dpu_format *fmt = data->dest.format;
u32 dst_format, pattern, ystride0, ystride1, outsize, chroma_samp;
u32 write_config = 0;
u32 opmode = 0;
u32 dst_addr_sw = 0;

chroma_samp = fmt->chroma_sample;

dst_format = (chroma_samp << 23) |
(fmt->fetch_planes << 19) |
(fmt->bits[C3_ALPHA] << 6) |
(fmt->bits[C2_R_Cr] << 4) |
(fmt->bits[C1_B_Cb] << 2) |
(fmt->bits[C0_G_Y] << 0);

if (fmt->bits[C3_ALPHA] || fmt->alpha_enable) {
dst_format |= BIT(8); /* DSTC3_EN */
if (!fmt->alpha_enable ||
!(ctx->caps->features & BIT(DPU_WB_PIPE_ALPHA)))
dst_format |= BIT(14); /* DST_ALPHA_X */
}

pattern = (fmt->element[3] << 24) |
(fmt->element[2] << 16) |
(fmt->element[1] << 8) |
(fmt->element[0] << 0);

dst_format |= (fmt->unpack_align_msb << 18) |
(fmt->unpack_tight << 17) |
((fmt->unpack_count - 1) << 12) |
((fmt->bpp - 1) << 9);

ystride0 = data->dest.plane_pitch[0] |
(data->dest.plane_pitch[1] << 16);
ystride1 = data->dest.plane_pitch[2] |
(data->dest.plane_pitch[3] << 16);

if (drm_rect_height(&data->roi) && drm_rect_width(&data->roi))
outsize = (drm_rect_height(&data->roi) << 16) | drm_rect_width(&data->roi);
else
outsize = (data->dest.height << 16) | data->dest.width;

DPU_REG_WRITE(c, WB_ALPHA_X_VALUE, 0xFF);
DPU_REG_WRITE(c, WB_DST_FORMAT, dst_format);
DPU_REG_WRITE(c, WB_DST_OP_MODE, opmode);
DPU_REG_WRITE(c, WB_DST_PACK_PATTERN, pattern);
DPU_REG_WRITE(c, WB_DST_YSTRIDE0, ystride0);
DPU_REG_WRITE(c, WB_DST_YSTRIDE1, ystride1);
DPU_REG_WRITE(c, WB_OUT_SIZE, outsize);
DPU_REG_WRITE(c, WB_DST_WRITE_CONFIG, write_config);
DPU_REG_WRITE(c, WB_DST_ADDR_SW_STATUS, dst_addr_sw);
}

static void dpu_hw_wb_roi(struct dpu_hw_wb *ctx, struct dpu_hw_wb_cfg *wb)
{
struct dpu_hw_blk_reg_map *c = &ctx->hw;
u32 image_size, out_size, out_xy;

image_size = (wb->dest.height << 16) | wb->dest.width;
out_xy = 0;
out_size = (drm_rect_height(&wb->roi) << 16) | drm_rect_width(&wb->roi);

DPU_REG_WRITE(c, WB_OUT_IMAGE_SIZE, image_size);
DPU_REG_WRITE(c, WB_OUT_XY, out_xy);
DPU_REG_WRITE(c, WB_OUT_SIZE, out_size);
}

static void dpu_hw_wb_setup_qos_lut(struct dpu_hw_wb *ctx,
struct dpu_hw_wb_qos_cfg *cfg)
{
struct dpu_hw_blk_reg_map *c = &ctx->hw;
u32 qos_ctrl = 0;

if (!ctx || !cfg)
return;

DPU_REG_WRITE(c, WB_DANGER_LUT, cfg->danger_lut);
DPU_REG_WRITE(c, WB_SAFE_LUT, cfg->safe_lut);

/*
* for chipsets not using DPU_WB_QOS_8LVL but still using DPU
* driver such as msm8998, the reset value of WB_CREQ_LUT is
* sufficient for writeback to work. SW doesn't need to explicitly
* program a value.
*/
if (ctx->caps && test_bit(DPU_WB_QOS_8LVL, &ctx->caps->features)) {
DPU_REG_WRITE(c, WB_CREQ_LUT_0, cfg->creq_lut);
DPU_REG_WRITE(c, WB_CREQ_LUT_1, cfg->creq_lut >> 32);
}

if (cfg->danger_safe_en)
qos_ctrl |= WB_QOS_CTRL_DANGER_SAFE_EN;

DPU_REG_WRITE(c, WB_QOS_CTRL, qos_ctrl);
}

static void dpu_hw_wb_setup_cdp(struct dpu_hw_wb *ctx,
struct dpu_hw_cdp_cfg *cfg)
{
struct dpu_hw_blk_reg_map *c;
u32 cdp_cntl = 0;

if (!ctx || !cfg)
return;

c = &ctx->hw;

if (cfg->enable)
cdp_cntl |= BIT(0);
if (cfg->ubwc_meta_enable)
cdp_cntl |= BIT(1);
if (cfg->preload_ahead == DPU_WB_CDP_PRELOAD_AHEAD_64)
cdp_cntl |= BIT(3);

DPU_REG_WRITE(c, WB_CDP_CNTL, cdp_cntl);
}

static void dpu_hw_wb_bind_pingpong_blk(
struct dpu_hw_wb *ctx,
bool enable, const enum dpu_pingpong pp)
{
struct dpu_hw_blk_reg_map *c;
int mux_cfg;

if (!ctx)
return;

c = &ctx->hw;

mux_cfg = DPU_REG_READ(c, WB_MUX);
mux_cfg &= ~0xf;

if (enable)
mux_cfg |= (pp - PINGPONG_0) & 0x7;
else
mux_cfg |= 0xf;

DPU_REG_WRITE(c, WB_MUX, mux_cfg);
}

static void _setup_wb_ops(struct dpu_hw_wb_ops *ops,
unsigned long features)
{
ops->setup_outaddress = dpu_hw_wb_setup_outaddress;
ops->setup_outformat = dpu_hw_wb_setup_format;

if (test_bit(DPU_WB_XY_ROI_OFFSET, &features))
ops->setup_roi = dpu_hw_wb_roi;

if (test_bit(DPU_WB_QOS, &features))
ops->setup_qos_lut = dpu_hw_wb_setup_qos_lut;

if (test_bit(DPU_WB_CDP, &features))
ops->setup_cdp = dpu_hw_wb_setup_cdp;

if (test_bit(DPU_WB_INPUT_CTRL, &features))
ops->bind_pingpong_blk = dpu_hw_wb_bind_pingpong_blk;
}

struct dpu_hw_wb *dpu_hw_wb_init(enum dpu_wb idx,
void __iomem *addr, const struct dpu_mdss_cfg *m)
{
struct dpu_hw_wb *c;
const struct dpu_wb_cfg *cfg;

if (!addr || !m)
return ERR_PTR(-EINVAL);

c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c)
return ERR_PTR(-ENOMEM);

cfg = _wb_offset(idx, m, addr, &c->hw);
if (IS_ERR(cfg)) {
WARN(1, "Unable to find wb idx=%d\n", idx);
kfree(c);
return ERR_PTR(-EINVAL);
}

/* Assign ops */
c->mdp = &m->mdp[0];
c->idx = idx;
c->caps = cfg;
_setup_wb_ops(&c->ops, c->caps->features);

return c;
}

void dpu_hw_wb_destroy(struct dpu_hw_wb *hw_wb)
{
kfree(hw_wb);
}
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