cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dp_link.h (3808B)

      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
     22enum dp_link_voltage_level {
     23	DP_TRAIN_VOLTAGE_SWING_LVL_0	= 0,
     24	DP_TRAIN_VOLTAGE_SWING_LVL_1	= 1,
     25	DP_TRAIN_VOLTAGE_SWING_LVL_2	= 2,
     26	DP_TRAIN_VOLTAGE_SWING_MAX	= DP_TRAIN_VOLTAGE_SWING_LVL_2,
     27};
     28
     29enum dp_link_preemaphasis_level {
     30	DP_TRAIN_PRE_EMPHASIS_LVL_0	= 0,
     31	DP_TRAIN_PRE_EMPHASIS_LVL_1	= 1,
     32	DP_TRAIN_PRE_EMPHASIS_LVL_2	= 2,
     33	DP_TRAIN_PRE_EMPHASIS_MAX	= DP_TRAIN_PRE_EMPHASIS_LVL_2,
     34};
     35
     36struct dp_link_test_video {
     37	u32 test_video_pattern;
     38	u32 test_bit_depth;
     39	u32 test_dyn_range;
     40	u32 test_h_total;
     41	u32 test_v_total;
     42	u32 test_h_start;
     43	u32 test_v_start;
     44	u32 test_hsync_pol;
     45	u32 test_hsync_width;
     46	u32 test_vsync_pol;
     47	u32 test_vsync_width;
     48	u32 test_h_width;
     49	u32 test_v_height;
     50	u32 test_rr_d;
     51	u32 test_rr_n;
     52};
     53
     54struct dp_link_test_audio {
     55	u32 test_audio_sampling_rate;
     56	u32 test_audio_channel_count;
     57	u32 test_audio_pattern_type;
     58	u32 test_audio_period_ch_1;
     59	u32 test_audio_period_ch_2;
     60	u32 test_audio_period_ch_3;
     61	u32 test_audio_period_ch_4;
     62	u32 test_audio_period_ch_5;
     63	u32 test_audio_period_ch_6;
     64	u32 test_audio_period_ch_7;
     65	u32 test_audio_period_ch_8;
     66};
     67
     68struct dp_link_phy_params {
     69	u32 phy_test_pattern_sel;
     70	u8 v_level;
     71	u8 p_level;
     72};
     73
     74struct dp_link {
     75	u32 sink_request;
     76	u32 test_response;
     77	bool psm_enabled;
     78
     79	u8 sink_count;
     80	struct dp_link_test_video test_video;
     81	struct dp_link_test_audio test_audio;
     82	struct dp_link_phy_params phy_params;
     83	struct dp_link_info link_params;
     84};
     85
     86/**
     87 * mdss_dp_test_bit_depth_to_bpp() - convert test bit depth to bpp
     88 * @tbd: test bit depth
     89 *
     90 * Returns the bits per pixel (bpp) to be used corresponding to the
     91 * git bit depth value. This function assumes that bit depth has
     92 * already been validated.
     93 */
     94static inline u32 dp_link_bit_depth_to_bpp(u32 tbd)
     95{
     96	/*
     97	 * Few simplistic rules and assumptions made here:
     98	 *    1. Bit depth is per color component
     99	 *    2. If bit depth is unknown return 0
    100	 *    3. Assume 3 color components
    101	 */
    102	switch (tbd) {
    103	case DP_TEST_BIT_DEPTH_6:
    104		return 18;
    105	case DP_TEST_BIT_DEPTH_8:
    106		return 24;
    107	case DP_TEST_BIT_DEPTH_10:
    108		return 30;
    109	case DP_TEST_BIT_DEPTH_UNKNOWN:
    110	default:
    111		return 0;
    112	}
    113}
    114
    115/**
    116 * dp_test_bit_depth_to_bpc() - convert test bit depth to bpc
    117 * @tbd: test bit depth
    118 *
    119 * Returns the bits per comp (bpc) to be used corresponding to the
    120 * bit depth value. This function assumes that bit depth has
    121 * already been validated.
    122 */
    123static inline u32 dp_link_bit_depth_to_bpc(u32 tbd)
    124{
    125	switch (tbd) {
    126	case DP_TEST_BIT_DEPTH_6:
    127		return 6;
    128	case DP_TEST_BIT_DEPTH_8:
    129		return 8;
    130	case DP_TEST_BIT_DEPTH_10:
    131		return 10;
    132	case DP_TEST_BIT_DEPTH_UNKNOWN:
    133	default:
    134		return 0;
    135	}
    136}
    137
    138void dp_link_reset_phy_params_vx_px(struct dp_link *dp_link);
    139u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp);
    140int dp_link_process_request(struct dp_link *dp_link);
    141int dp_link_get_colorimetry_config(struct dp_link *dp_link);
    142int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status);
    143bool dp_link_send_test_response(struct dp_link *dp_link);
    144int dp_link_psm_config(struct dp_link *dp_link,
    145		struct dp_link_info *link_info, bool enable);
    146bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum);
    147
    148/**
    149 * dp_link_get() - get the functionalities of dp test module
    150 *
    151 *
    152 * return: a pointer to dp_link struct
    153 */
    154struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux);
    155
    156#endif /* _DP_LINK_H_ */