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