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_LINK_H_
  7#define _DP_LINK_H_
  8
  9#include "dp_aux.h"
 10
 11#define DS_PORT_STATUS_CHANGED 0x200
 12#define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF
 13#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0)
 14
 15struct dp_link_info {
 16	unsigned char revision;
 17	unsigned int rate;
 18	unsigned int num_lanes;
 19	unsigned long capabilities;
 20};
 21
 22#define DP_TRAIN_LEVEL_MAX	3
 23
 24struct dp_link_test_video {
 25	u32 test_video_pattern;
 26	u32 test_bit_depth;
 27	u32 test_dyn_range;
 28	u32 test_h_total;
 29	u32 test_v_total;
 30	u32 test_h_start;
 31	u32 test_v_start;
 32	u32 test_hsync_pol;
 33	u32 test_hsync_width;
 34	u32 test_vsync_pol;
 35	u32 test_vsync_width;
 36	u32 test_h_width;
 37	u32 test_v_height;
 38	u32 test_rr_d;
 39	u32 test_rr_n;
 40};
 41
 42struct dp_link_test_audio {
 43	u32 test_audio_sampling_rate;
 44	u32 test_audio_channel_count;
 45	u32 test_audio_pattern_type;
 46	u32 test_audio_period_ch_1;
 47	u32 test_audio_period_ch_2;
 48	u32 test_audio_period_ch_3;
 49	u32 test_audio_period_ch_4;
 50	u32 test_audio_period_ch_5;
 51	u32 test_audio_period_ch_6;
 52	u32 test_audio_period_ch_7;
 53	u32 test_audio_period_ch_8;
 54};
 55
 56struct dp_link_phy_params {
 57	u32 phy_test_pattern_sel;
 58	u8 v_level;
 59	u8 p_level;
 60};
 61
 62struct dp_link {
 63	u32 sink_request;
 64	u32 test_response;
 65	bool psm_enabled;
 66
 67	u8 sink_count;
 68	struct dp_link_test_video test_video;
 69	struct dp_link_test_audio test_audio;
 70	struct dp_link_phy_params phy_params;
 71	struct dp_link_info link_params;
 72};
 73
 74/**
 75 * mdss_dp_test_bit_depth_to_bpp() - convert test bit depth to bpp
 76 * @tbd: test bit depth
 77 *
 78 * Returns the bits per pixel (bpp) to be used corresponding to the
 79 * git bit depth value. This function assumes that bit depth has
 80 * already been validated.
 81 */
 82static inline u32 dp_link_bit_depth_to_bpp(u32 tbd)
 83{
 84	/*
 85	 * Few simplistic rules and assumptions made here:
 86	 *    1. Bit depth is per color component
 87	 *    2. If bit depth is unknown return 0
 88	 *    3. Assume 3 color components
 89	 */
 90	switch (tbd) {
 91	case DP_TEST_BIT_DEPTH_6:
 92		return 18;
 93	case DP_TEST_BIT_DEPTH_8:
 94		return 24;
 95	case DP_TEST_BIT_DEPTH_10:
 96		return 30;
 97	case DP_TEST_BIT_DEPTH_UNKNOWN:
 98	default:
 99		return 0;
100	}
101}
102
103void dp_link_reset_phy_params_vx_px(struct dp_link *dp_link);
104u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp);
105int dp_link_process_request(struct dp_link *dp_link);
106int dp_link_get_colorimetry_config(struct dp_link *dp_link);
107int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status);
108bool dp_link_send_test_response(struct dp_link *dp_link);
109int dp_link_psm_config(struct dp_link *dp_link,
110		struct dp_link_info *link_info, bool enable);
111bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum);
112
113/**
114 * dp_link_get() - get the functionalities of dp test module
115 *
116 *
117 * return: a pointer to dp_link struct
118 */
119struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux);
120
121#endif /* _DP_LINK_H_ */