1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
4 */
5
6#ifndef _DP_PANEL_H_
7#define _DP_PANEL_H_
8
9#include <drm/msm_drm.h>
10
11#include "dp_aux.h"
12#include "dp_link.h"
13
14struct edid;
15
16#define DPRX_EXTENDED_DPCD_FIELD	0x2200
17
18#define DP_DOWNSTREAM_PORTS		4
19#define DP_DOWNSTREAM_CAP_SIZE		4
20
21struct dp_display_mode {
22	struct drm_display_mode drm_mode;
23	u32 capabilities;
24	u32 bpp;
25	u32 h_active_low;
26	u32 v_active_low;
27};
28
29struct dp_panel_in {
30	struct device *dev;
31	struct drm_dp_aux *aux;
32	struct dp_link *link;
33	struct dp_catalog *catalog;
34};
35
36struct dp_panel_psr {
37	u8 version;
38	u8 capabilities;
39};
40
41struct dp_panel {
42	/* dpcd raw data */
43	u8 dpcd[DP_RECEIVER_CAP_SIZE + 1];
44	u8 ds_cap_info[DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE];
45	u32 ds_port_cnt;
46	u32 dfp_present;
47
48	struct dp_link_info link_info;
49	struct drm_dp_desc desc;
50	struct edid *edid;
51	struct drm_connector *connector;
52	struct dp_display_mode dp_mode;
53	struct dp_panel_psr psr_cap;
54	bool video_test;
55
56	u32 vic;
57	u32 max_dp_lanes;
58	u32 max_dp_link_rate;
59
60	u32 max_bw_code;
61};
62
63int dp_panel_init_panel_info(struct dp_panel *dp_panel);
64int dp_panel_deinit(struct dp_panel *dp_panel);
65int dp_panel_timing_cfg(struct dp_panel *dp_panel);
66void dp_panel_dump_regs(struct dp_panel *dp_panel);
67int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
68		struct drm_connector *connector);
69u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, u32 mode_max_bpp,
70			u32 mode_pclk_khz);
71int dp_panel_get_modes(struct dp_panel *dp_panel,
72		struct drm_connector *connector);
73void dp_panel_handle_sink_request(struct dp_panel *dp_panel);
74void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable);
75
76/**
77 * is_link_rate_valid() - validates the link rate
78 * @lane_rate: link rate requested by the sink
79 *
80 * Returns true if the requested link rate is supported.
81 */
82static inline bool is_link_rate_valid(u32 bw_code)
83{
84	return (bw_code == DP_LINK_BW_1_62 ||
85		bw_code == DP_LINK_BW_2_7 ||
86		bw_code == DP_LINK_BW_5_4 ||
87		bw_code == DP_LINK_BW_8_1);
88}
89
90/**
91 * dp_link_is_lane_count_valid() - validates the lane count
92 * @lane_count: lane count requested by the sink
93 *
94 * Returns true if the requested lane count is supported.
95 */
96static inline bool is_lane_count_valid(u32 lane_count)
97{
98	return (lane_count == 1 ||
99		lane_count == 2 ||
100		lane_count == 4);
101}
102
103struct dp_panel *dp_panel_get(struct dp_panel_in *in);
104void dp_panel_put(struct dp_panel *dp_panel);
105#endif /* _DP_PANEL_H_ */
106