1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2020-2022, Linaro Limited
4 */
5
6 #include <drm/drm_managed.h>
7
8 #include <drm/display/drm_dsc_helper.h>
9
10 #include "dpu_kms.h"
11 #include "dpu_hw_catalog.h"
12 #include "dpu_hwio.h"
13 #include "dpu_hw_mdss.h"
14 #include "dpu_hw_dsc.h"
15
16 #define DSC_COMMON_MODE 0x000
17 #define DSC_ENC 0x004
18 #define DSC_PICTURE 0x008
19 #define DSC_SLICE 0x00C
20 #define DSC_CHUNK_SIZE 0x010
21 #define DSC_DELAY 0x014
22 #define DSC_SCALE_INITIAL 0x018
23 #define DSC_SCALE_DEC_INTERVAL 0x01C
24 #define DSC_SCALE_INC_INTERVAL 0x020
25 #define DSC_FIRST_LINE_BPG_OFFSET 0x024
26 #define DSC_BPG_OFFSET 0x028
27 #define DSC_DSC_OFFSET 0x02C
28 #define DSC_FLATNESS 0x030
29 #define DSC_RC_MODEL_SIZE 0x034
30 #define DSC_RC 0x038
31 #define DSC_RC_BUF_THRESH 0x03C
32 #define DSC_RANGE_MIN_QP 0x074
33 #define DSC_RANGE_MAX_QP 0x0B0
34 #define DSC_RANGE_BPG_OFFSET 0x0EC
35
36 #define DSC_CTL(m) (0x1800 - 0x3FC * (m - DSC_0))
37
dpu_hw_dsc_disable(struct dpu_hw_dsc * dsc)38 static void dpu_hw_dsc_disable(struct dpu_hw_dsc *dsc)
39 {
40 struct dpu_hw_blk_reg_map *c = &dsc->hw;
41
42 DPU_REG_WRITE(c, DSC_COMMON_MODE, 0);
43 }
44
dpu_hw_dsc_config(struct dpu_hw_dsc * hw_dsc,struct drm_dsc_config * dsc,u32 mode,u32 initial_lines)45 static void dpu_hw_dsc_config(struct dpu_hw_dsc *hw_dsc,
46 struct drm_dsc_config *dsc,
47 u32 mode,
48 u32 initial_lines)
49 {
50 struct dpu_hw_blk_reg_map *c = &hw_dsc->hw;
51 u32 data;
52 u32 slice_last_group_size;
53 u32 det_thresh_flatness;
54 bool is_cmd_mode = !(mode & DSC_MODE_VIDEO);
55
56 DPU_REG_WRITE(c, DSC_COMMON_MODE, mode);
57
58 if (is_cmd_mode)
59 initial_lines += 1;
60
61 slice_last_group_size = (dsc->slice_width + 2) % 3;
62
63 data = (initial_lines << 20);
64 data |= (slice_last_group_size << 18);
65 /* bpp is 6.4 format, 4 LSBs bits are for fractional part */
66 data |= (dsc->bits_per_pixel << 8);
67 data |= (dsc->block_pred_enable << 7);
68 data |= (dsc->line_buf_depth << 3);
69 data |= (dsc->simple_422 << 2);
70 data |= (dsc->convert_rgb << 1);
71 data |= dsc->bits_per_component;
72
73 DPU_REG_WRITE(c, DSC_ENC, data);
74
75 data = dsc->pic_width << 16;
76 data |= dsc->pic_height;
77 DPU_REG_WRITE(c, DSC_PICTURE, data);
78
79 data = dsc->slice_width << 16;
80 data |= dsc->slice_height;
81 DPU_REG_WRITE(c, DSC_SLICE, data);
82
83 data = dsc->slice_chunk_size << 16;
84 DPU_REG_WRITE(c, DSC_CHUNK_SIZE, data);
85
86 data = dsc->initial_dec_delay << 16;
87 data |= dsc->initial_xmit_delay;
88 DPU_REG_WRITE(c, DSC_DELAY, data);
89
90 data = dsc->initial_scale_value;
91 DPU_REG_WRITE(c, DSC_SCALE_INITIAL, data);
92
93 data = dsc->scale_decrement_interval;
94 DPU_REG_WRITE(c, DSC_SCALE_DEC_INTERVAL, data);
95
96 data = dsc->scale_increment_interval;
97 DPU_REG_WRITE(c, DSC_SCALE_INC_INTERVAL, data);
98
99 data = dsc->first_line_bpg_offset;
100 DPU_REG_WRITE(c, DSC_FIRST_LINE_BPG_OFFSET, data);
101
102 data = dsc->nfl_bpg_offset << 16;
103 data |= dsc->slice_bpg_offset;
104 DPU_REG_WRITE(c, DSC_BPG_OFFSET, data);
105
106 data = dsc->initial_offset << 16;
107 data |= dsc->final_offset;
108 DPU_REG_WRITE(c, DSC_DSC_OFFSET, data);
109
110 det_thresh_flatness = drm_dsc_flatness_det_thresh(dsc);
111 data = det_thresh_flatness << 10;
112 data |= dsc->flatness_max_qp << 5;
113 data |= dsc->flatness_min_qp;
114 DPU_REG_WRITE(c, DSC_FLATNESS, data);
115
116 data = dsc->rc_model_size;
117 DPU_REG_WRITE(c, DSC_RC_MODEL_SIZE, data);
118
119 data = dsc->rc_tgt_offset_low << 18;
120 data |= dsc->rc_tgt_offset_high << 14;
121 data |= dsc->rc_quant_incr_limit1 << 9;
122 data |= dsc->rc_quant_incr_limit0 << 4;
123 data |= dsc->rc_edge_factor;
124 DPU_REG_WRITE(c, DSC_RC, data);
125 }
126
dpu_hw_dsc_config_thresh(struct dpu_hw_dsc * hw_dsc,struct drm_dsc_config * dsc)127 static void dpu_hw_dsc_config_thresh(struct dpu_hw_dsc *hw_dsc,
128 struct drm_dsc_config *dsc)
129 {
130 struct drm_dsc_rc_range_parameters *rc = dsc->rc_range_params;
131 struct dpu_hw_blk_reg_map *c = &hw_dsc->hw;
132 u32 off;
133 int i;
134
135 off = DSC_RC_BUF_THRESH;
136 for (i = 0; i < DSC_NUM_BUF_RANGES - 1 ; i++) {
137 DPU_REG_WRITE(c, off, dsc->rc_buf_thresh[i]);
138 off += 4;
139 }
140
141 off = DSC_RANGE_MIN_QP;
142 for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
143 DPU_REG_WRITE(c, off, rc[i].range_min_qp);
144 off += 4;
145 }
146
147 off = DSC_RANGE_MAX_QP;
148 for (i = 0; i < 15; i++) {
149 DPU_REG_WRITE(c, off, rc[i].range_max_qp);
150 off += 4;
151 }
152
153 off = DSC_RANGE_BPG_OFFSET;
154 for (i = 0; i < 15; i++) {
155 DPU_REG_WRITE(c, off, rc[i].range_bpg_offset);
156 off += 4;
157 }
158 }
159
dpu_hw_dsc_bind_pingpong_blk(struct dpu_hw_dsc * hw_dsc,const enum dpu_pingpong pp)160 static void dpu_hw_dsc_bind_pingpong_blk(
161 struct dpu_hw_dsc *hw_dsc,
162 const enum dpu_pingpong pp)
163 {
164 struct dpu_hw_blk_reg_map *c = &hw_dsc->hw;
165 int mux_cfg = 0xF;
166 u32 dsc_ctl_offset;
167
168 dsc_ctl_offset = DSC_CTL(hw_dsc->idx);
169
170 if (pp)
171 mux_cfg = (pp - PINGPONG_0) & 0x7;
172
173 if (pp)
174 DRM_DEBUG_KMS("Binding dsc:%d to pp:%d\n",
175 hw_dsc->idx - DSC_0, pp - PINGPONG_0);
176 else
177 DRM_DEBUG_KMS("Unbinding dsc:%d from any pp\n",
178 hw_dsc->idx - DSC_0);
179
180 DPU_REG_WRITE(c, dsc_ctl_offset, mux_cfg);
181 }
182
_setup_dsc_ops(struct dpu_hw_dsc_ops * ops,unsigned long cap)183 static void _setup_dsc_ops(struct dpu_hw_dsc_ops *ops,
184 unsigned long cap)
185 {
186 ops->dsc_disable = dpu_hw_dsc_disable;
187 ops->dsc_config = dpu_hw_dsc_config;
188 ops->dsc_config_thresh = dpu_hw_dsc_config_thresh;
189 if (cap & BIT(DPU_DSC_OUTPUT_CTRL))
190 ops->dsc_bind_pingpong_blk = dpu_hw_dsc_bind_pingpong_blk;
191 };
192
dpu_hw_dsc_init(struct drm_device * dev,const struct dpu_dsc_cfg * cfg,void __iomem * addr)193 struct dpu_hw_dsc *dpu_hw_dsc_init(struct drm_device *dev,
194 const struct dpu_dsc_cfg *cfg,
195 void __iomem *addr)
196 {
197 struct dpu_hw_dsc *c;
198
199 c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
200 if (!c)
201 return ERR_PTR(-ENOMEM);
202
203 c->hw.blk_addr = addr + cfg->base;
204 c->hw.log_mask = DPU_DBG_MASK_DSC;
205
206 c->idx = cfg->id;
207 c->caps = cfg;
208 _setup_dsc_ops(&c->ops, c->caps->features);
209
210 return c;
211 }
212