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/* 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"
#define DS_PORT_STATUS_CHANGED 0x200
#define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF
#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0)
struct dp_link_info {
unsigned char revision;
unsigned int rate;
unsigned int num_lanes;
unsigned long capabilities;
};
enum dp_link_voltage_level {
DP_TRAIN_VOLTAGE_SWING_LVL_0 = 0,
DP_TRAIN_VOLTAGE_SWING_LVL_1 = 1,
DP_TRAIN_VOLTAGE_SWING_LVL_2 = 2,
DP_TRAIN_VOLTAGE_SWING_MAX = DP_TRAIN_VOLTAGE_SWING_LVL_2,
};
enum dp_link_preemaphasis_level {
DP_TRAIN_PRE_EMPHASIS_LVL_0 = 0,
DP_TRAIN_PRE_EMPHASIS_LVL_1 = 1,
DP_TRAIN_PRE_EMPHASIS_LVL_2 = 2,
DP_TRAIN_PRE_EMPHASIS_MAX = DP_TRAIN_PRE_EMPHASIS_LVL_2,
};
struct 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 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 dp_link_phy_params {
u32 phy_test_pattern_sel;
u8 v_level;
u8 p_level;
};
struct dp_link {
u32 sink_request;
u32 test_response;
bool psm_enabled;
u8 sink_count;
struct dp_link_test_video test_video;
struct dp_link_test_audio test_audio;
struct dp_link_phy_params phy_params;
struct dp_link_info link_params;
};
/**
* mdss_dp_test_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
* git bit depth value. This function assumes that bit depth has
* already been validated.
*/
static inline u32 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;
}
}
/**
* dp_test_bit_depth_to_bpc() - convert test bit depth to bpc
* @tbd: test bit depth
*
* Returns the bits per comp (bpc) to be used corresponding to the
* bit depth value. This function assumes that bit depth has
* already been validated.
*/
static inline u32 dp_link_bit_depth_to_bpc(u32 tbd)
{
switch (tbd) {
case DP_TEST_BIT_DEPTH_6:
return 6;
case DP_TEST_BIT_DEPTH_8:
return 8;
case DP_TEST_BIT_DEPTH_10:
return 10;
case DP_TEST_BIT_DEPTH_UNKNOWN:
default:
return 0;
}
}
u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp);
int dp_link_process_request(struct dp_link *dp_link);
int dp_link_get_colorimetry_config(struct dp_link *dp_link);
int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status);
bool dp_link_send_test_response(struct dp_link *dp_link);
int dp_link_psm_config(struct dp_link *dp_link,
struct dp_link_info *link_info, bool enable);
bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum);
/**
* dp_link_get() - get the functionalities of dp test module
*
*
* return: a pointer to dp_link struct
*/
struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux);
#endif /* _DP_LINK_H_ */
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