121 lines · c
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 0x20012#define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF13#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 323 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 66 u8 sink_count;67 struct dp_link_test_video test_video;68 struct dp_link_test_audio test_audio;69 struct dp_link_phy_params phy_params;70 struct dp_link_info link_params;71};72 73/**74 * mdss_dp_test_bit_depth_to_bpp() - convert test bit depth to bpp75 * @tbd: test bit depth76 *77 * Returns the bits per pixel (bpp) to be used corresponding to the78 * git bit depth value. This function assumes that bit depth has79 * already been validated.80 */81static inline u32 dp_link_bit_depth_to_bpp(u32 tbd)82{83 /*84 * Few simplistic rules and assumptions made here:85 * 1. Bit depth is per color component86 * 2. If bit depth is unknown return 087 * 3. Assume 3 color components88 */89 switch (tbd) {90 case DP_TEST_BIT_DEPTH_6:91 return 18;92 case DP_TEST_BIT_DEPTH_8:93 return 24;94 case DP_TEST_BIT_DEPTH_10:95 return 30;96 case DP_TEST_BIT_DEPTH_UNKNOWN:97 default:98 return 0;99 }100}101 102void dp_link_reset_phy_params_vx_px(struct dp_link *dp_link);103u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp);104int dp_link_process_request(struct dp_link *dp_link);105int dp_link_get_colorimetry_config(struct dp_link *dp_link);106int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status);107bool dp_link_send_test_response(struct dp_link *dp_link);108int dp_link_psm_config(struct dp_link *dp_link,109 struct dp_link_info *link_info, bool enable);110bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum);111 112/**113 * dp_link_get() - get the functionalities of dp test module114 *115 *116 * return: a pointer to dp_link struct117 */118struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux);119 120#endif /* _DP_LINK_H_ */121