/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
 */

#ifndef _DP_LINK_H_
#define _DP_LINK_H_

#include "dp_aux.h"
#include <drm/display/drm_dp_helper.h>

#define DS_PORT_STATUS_CHANGED 0x200
#define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF
#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0)
#define DP_MAX_NUM_DP_LANES    4

struct msm_dp_link_info {
        unsigned char revision;
        unsigned int rate;
        unsigned int supported_rates[DP_MAX_SUPPORTED_RATES];
        unsigned int rate_set;
        bool use_rate_set;
        unsigned int num_lanes;
        unsigned long capabilities;
};

#define DP_TRAIN_LEVEL_MAX      3

struct msm_dp_link_test_video {
        u32 test_video_pattern;
        u32 test_bit_depth;
        u32 test_dyn_range;
        u32 test_h_total;
        u32 test_v_total;
        u32 test_h_start;
        u32 test_v_start;
        u32 test_hsync_pol;
        u32 test_hsync_width;
        u32 test_vsync_pol;
        u32 test_vsync_width;
        u32 test_h_width;
        u32 test_v_height;
        u32 test_rr_d;
        u32 test_rr_n;
};

struct msm_dp_link_test_audio {
        u32 test_audio_sampling_rate;
        u32 test_audio_channel_count;
        u32 test_audio_pattern_type;
        u32 test_audio_period_ch_1;
        u32 test_audio_period_ch_2;
        u32 test_audio_period_ch_3;
        u32 test_audio_period_ch_4;
        u32 test_audio_period_ch_5;
        u32 test_audio_period_ch_6;
        u32 test_audio_period_ch_7;
        u32 test_audio_period_ch_8;
};

struct msm_dp_link_phy_params {
        u32 phy_test_pattern_sel;
        u8 v_level;
        u8 p_level;
};

struct msm_dp_link {
        u8 lttpr_common_caps[DP_LTTPR_COMMON_CAP_SIZE];
        int lttpr_count;

        u32 sink_request;
        u32 test_response;

        u8 sink_count;
        struct msm_dp_link_test_video test_video;
        struct msm_dp_link_test_audio test_audio;
        struct msm_dp_link_phy_params phy_params;
        struct msm_dp_link_info link_params;

        u32 lane_map[DP_MAX_NUM_DP_LANES];
        u32 max_dp_lanes;
        u32 max_dp_link_rate;
};

/**
 * msm_dp_link_bit_depth_to_bpp() - convert test bit depth to bpp
 * @tbd: test bit depth
 *
 * Returns: the bits per pixel (bpp) to be used corresponding to the
 * bit depth value. This function assumes that bit depth has
 * already been validated.
 */
static inline u32 msm_dp_link_bit_depth_to_bpp(u32 tbd)
{
        /*
         * Few simplistic rules and assumptions made here:
         *    1. Bit depth is per color component
         *    2. If bit depth is unknown return 0
         *    3. Assume 3 color components
         */
        switch (tbd) {
        case DP_TEST_BIT_DEPTH_6:
                return 18;
        case DP_TEST_BIT_DEPTH_8:
                return 24;
        case DP_TEST_BIT_DEPTH_10:
                return 30;
        case DP_TEST_BIT_DEPTH_UNKNOWN:
        default:
                return 0;
        }
}

void msm_dp_link_reset_phy_params_vx_px(struct msm_dp_link *msm_dp_link);
u32 msm_dp_link_get_test_bits_depth(struct msm_dp_link *msm_dp_link, u32 bpp);
int msm_dp_link_process_request(struct msm_dp_link *msm_dp_link);
int msm_dp_link_get_colorimetry_config(struct msm_dp_link *msm_dp_link);
int msm_dp_link_adjust_levels(struct msm_dp_link *msm_dp_link, u8 *link_status);
bool msm_dp_link_send_test_response(struct msm_dp_link *msm_dp_link);
int msm_dp_link_psm_config(struct msm_dp_link *msm_dp_link,
                struct msm_dp_link_info *link_info, bool enable);
bool msm_dp_link_send_edid_checksum(struct msm_dp_link *msm_dp_link, u8 checksum);

/**
 * msm_dp_link_get() - get the functionalities of dp test module
 * @dev: kernel device structure
 * @aux: DisplayPort AUX channel
 *
 * return: a pointer to msm_dp_link struct
 */
struct msm_dp_link *msm_dp_link_get(struct device *dev, struct drm_dp_aux *aux);

#endif /* _DP_LINK_H_ */