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_PANEL_H_
  7#define _DP_PANEL_H_
  8
  9#include <drm/msm_drm.h>
 10
 11#include "dp_aux.h"
 12#include "dp_link.h"
 13#include "dp_hpd.h"
 14
 15struct edid;
 16
 17#define DPRX_EXTENDED_DPCD_FIELD	0x2200
 18
 19#define DP_DOWNSTREAM_PORTS		4
 20#define DP_DOWNSTREAM_CAP_SIZE		4
 21
 22struct dp_display_mode {
 23	struct drm_display_mode drm_mode;
 24	u32 capabilities;
 25	u32 bpp;
 26	u32 h_active_low;
 27	u32 v_active_low;
 28};
 29
 30struct dp_panel_in {
 31	struct device *dev;
 32	struct drm_dp_aux *aux;
 33	struct dp_link *link;
 34	struct dp_catalog *catalog;
 35};
 36
 37struct dp_panel {
 38	/* dpcd raw data */
 39	u8 dpcd[DP_RECEIVER_CAP_SIZE + 1];
 40	u8 ds_cap_info[DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE];
 41	u32 ds_port_cnt;
 42	u32 dfp_present;
 43
 44	struct dp_link_info link_info;
 45	struct drm_dp_desc desc;
 46	struct edid *edid;
 47	struct drm_connector *connector;
 48	struct dp_display_mode dp_mode;
 49	bool video_test;
 50
 51	u32 vic;
 52	u32 max_pclk_khz;
 53	u32 max_dp_lanes;
 54
 55	u32 max_bw_code;
 56};
 57
 58int dp_panel_init_panel_info(struct dp_panel *dp_panel);
 59int dp_panel_deinit(struct dp_panel *dp_panel);
 60int dp_panel_timing_cfg(struct dp_panel *dp_panel);
 61void dp_panel_dump_regs(struct dp_panel *dp_panel);
 62int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
 63		struct drm_connector *connector);
 64u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, u32 mode_max_bpp,
 65			u32 mode_pclk_khz);
 66int dp_panel_get_modes(struct dp_panel *dp_panel,
 67		struct drm_connector *connector, struct dp_display_mode *mode);
 68void dp_panel_handle_sink_request(struct dp_panel *dp_panel);
 69void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable);
 70
 71/**
 72 * is_link_rate_valid() - validates the link rate
 73 * @lane_rate: link rate requested by the sink
 74 *
 75 * Returns true if the requested link rate is supported.
 76 */
 77static inline bool is_link_rate_valid(u32 bw_code)
 78{
 79	return (bw_code == DP_LINK_BW_1_62 ||
 80		bw_code == DP_LINK_BW_2_7 ||
 81		bw_code == DP_LINK_BW_5_4 ||
 82		bw_code == DP_LINK_BW_8_1);
 83}
 84
 85/**
 86 * dp_link_is_lane_count_valid() - validates the lane count
 87 * @lane_count: lane count requested by the sink
 88 *
 89 * Returns true if the requested lane count is supported.
 90 */
 91static inline bool is_lane_count_valid(u32 lane_count)
 92{
 93	return (lane_count == 1 ||
 94		lane_count == 2 ||
 95		lane_count == 4);
 96}
 97
 98struct dp_panel *dp_panel_get(struct dp_panel_in *in);
 99void dp_panel_put(struct dp_panel *dp_panel);
100#endif /* _DP_PANEL_H_ */