1#ifndef DC_DSC_H_
 2#define DC_DSC_H_
 3/*
 4 * Copyright 2019 Advanced Micro Devices, Inc.
 5 *
 6 * Permission is hereby granted, free of charge, to any person obtaining a
 7 * copy of this software and associated documentation files (the "Software"),
 8 * to deal in the Software without restriction, including without limitation
 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Author: AMD
25 */
26
27/* put it here temporarily until linux has the new addresses official defined */
28/* DP Extended DSC Capabilities */
29#define DP_DSC_BRANCH_OVERALL_THROUGHPUT_0  0x0a0   /* DP 1.4a SCR */
30#define DP_DSC_BRANCH_OVERALL_THROUGHPUT_1  0x0a1
31#define DP_DSC_BRANCH_MAX_LINE_WIDTH        0x0a2
32#include "dc_types.h"
33
34struct dc_dsc_bw_range {
35	uint32_t min_kbps; /* Bandwidth if min_target_bpp_x16 is used */
36	uint32_t min_target_bpp_x16;
37	uint32_t max_kbps; /* Bandwidth if max_target_bpp_x16 is used */
38	uint32_t max_target_bpp_x16;
39	uint32_t stream_kbps; /* Uncompressed stream bandwidth */
40};
41
42struct display_stream_compressor {
43	const struct dsc_funcs *funcs;
44	struct dc_context *ctx;
45	int inst;
46};
47
48struct dc_dsc_policy {
49	bool use_min_slices_h;
50	int max_slices_h; // Maximum available if 0
51	int min_slice_height; // Must not be less than 8
52	uint32_t max_target_bpp;
53	uint32_t min_target_bpp;
54};
55
56bool dc_dsc_parse_dsc_dpcd(const struct dc *dc,
57		const uint8_t *dpcd_dsc_basic_data,
58		const uint8_t *dpcd_dsc_ext_data,
59		struct dsc_dec_dpcd_caps *dsc_sink_caps);
60
61bool dc_dsc_compute_bandwidth_range(
62		const struct display_stream_compressor *dsc,
63		const uint32_t dsc_min_slice_height_override,
64		const uint32_t min_bpp,
65		const uint32_t max_bpp,
66		const struct dsc_dec_dpcd_caps *dsc_sink_caps,
67		const struct dc_crtc_timing *timing,
68		struct dc_dsc_bw_range *range);
69
70bool dc_dsc_compute_config(
71		const struct display_stream_compressor *dsc,
72		const struct dsc_dec_dpcd_caps *dsc_sink_caps,
73		const uint32_t dsc_min_slice_height_override,
74		uint32_t target_bandwidth_kbps,
75		const struct dc_crtc_timing *timing,
76		struct dc_dsc_config *dsc_cfg);
77
78void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing,
79		struct dc_dsc_policy *policy);
80
81void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit);
82
83#endif