drivers/gpu/drm/msm/dp/dp_panel.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
 */

#ifndef _DP_PANEL_H_
#define _DP_PANEL_H_

#include <drm/msm_drm.h>

#include "dp_aux.h"
#include "dp_link.h"
#include "dp_usbpd.h"
#include "sde_edid_parser.h"
#include "sde_connector.h"
#include "msm_drv.h"

#define DP_RECEIVER_DSC_CAP_SIZE    15
#define DP_RECEIVER_FEC_STATUS_SIZE 3

/*
 * A source initiated power down flag is set
 * when the DP is powered off while physical
 * DP cable is still connected i.e. without
 * HPD or not initiated by sink like HPD_IRQ.
 * This can happen if framework reboots or
 * device suspends.
 */
#define DP_PANEL_SRC_INITIATED_POWER_DOWN BIT(0)

enum dp_lane_count {
	DP_LANE_COUNT_1	= 1,
	DP_LANE_COUNT_2	= 2,
	DP_LANE_COUNT_4	= 4,
};

#define DP_MAX_DOWNSTREAM_PORTS 0x10

struct dp_panel_info {
	u32 h_active;
	u32 v_active;
	u32 h_back_porch;
	u32 h_front_porch;
	u32 h_sync_width;
	u32 h_active_low;
	u32 v_back_porch;
	u32 v_front_porch;
	u32 v_sync_width;
	u32 v_active_low;
	u32 h_skew;
	u32 refresh_rate;
	u32 pixel_clk_khz;
	u32 bpp;
	bool widebus_en;
	struct msm_compression_info comp_info;
	s64 dsc_overhead_fp;
};

struct dp_display_mode {
	struct dp_panel_info timing;
	u32 capabilities;
	s64 fec_overhead_fp;
	s64 dsc_overhead_fp;
};

struct dp_panel;

struct dp_panel_in {
	struct device *dev;
	struct dp_aux *aux;
	struct dp_link *link;
	struct dp_catalog_panel *catalog;
	struct drm_connector *connector;
	struct dp_panel *base_panel;
	struct dp_parser *parser;
};

struct dp_dsc_caps {
	bool dsc_capable;
	u8 version;
	bool block_pred_en;
};

struct dp_audio;

#define DP_PANEL_CAPS_DSC	BIT(0)

struct dp_panel {
	/* dpcd raw data */
	u8 dpcd[DP_RECEIVER_CAP_SIZE + 1];
	u8 ds_ports[DP_MAX_DOWNSTREAM_PORTS];
	u8 dsc_dpcd[DP_RECEIVER_DSC_CAP_SIZE + 1];
	u8 fec_dpcd;
	u8 fec_sts_dpcd[DP_RECEIVER_FEC_STATUS_SIZE + 1];

	struct drm_dp_link link_info;
	struct sde_edid_ctrl *edid_ctrl;
	struct dp_panel_info pinfo;
	bool video_test;
	bool spd_enabled;

	u32 vic;
	u32 max_pclk_khz;
	s64 mst_target_sc;

	/* debug */
	u32 max_bw_code;

	/* By default, stream_id is assigned to DP_INVALID_STREAM.
	 * Client sets the stream id value using set_stream_id interface.
	 */
	enum dp_stream_id stream_id;
	int vcpi;

	u32 channel_start_slot;
	u32 channel_total_slots;
	u32 pbn;

	u32 tot_dsc_blks_in_use;
	/* DRM connector assosiated with this panel */
	struct drm_connector *connector;

	struct dp_audio *audio;
	bool audio_supported;

	struct dp_dsc_caps sink_dsc_caps;
	bool dsc_feature_enable;
	bool fec_feature_enable;
	bool dsc_en;
	bool fec_en;
	bool widebus_en;
	bool mst_state;

	s64 fec_overhead_fp;

	int (*init)(struct dp_panel *dp_panel);
	int (*deinit)(struct dp_panel *dp_panel, u32 flags);
	int (*hw_cfg)(struct dp_panel *dp_panel, bool enable);
	int (*read_sink_caps)(struct dp_panel *dp_panel,
		struct drm_connector *connector, bool multi_func);
	u32 (*get_min_req_link_rate)(struct dp_panel *dp_panel);
	u32 (*get_mode_bpp)(struct dp_panel *dp_panel, u32 mode_max_bpp,
			u32 mode_pclk_khz);
	int (*get_modes)(struct dp_panel *dp_panel,
		struct drm_connector *connector, struct dp_display_mode *mode);
	void (*handle_sink_request)(struct dp_panel *dp_panel);
	int (*set_edid)(struct dp_panel *dp_panel, u8 *edid);
	int (*set_dpcd)(struct dp_panel *dp_panel, u8 *dpcd);
	int (*setup_hdr)(struct dp_panel *dp_panel,
		struct drm_msm_ext_hdr_metadata *hdr_meta,
		bool dhdr_update, u64 core_clk_rate);
	void (*tpg_config)(struct dp_panel *dp_panel, bool enable);
	int (*spd_config)(struct dp_panel *dp_panel);
	bool (*hdr_supported)(struct dp_panel *dp_panel);

	int (*set_stream_info)(struct dp_panel *dp_panel,
			enum dp_stream_id stream_id, u32 ch_start_slot,
			u32 ch_tot_slots, u32 pbn, int vcpi);

	int (*read_sink_status)(struct dp_panel *dp_panel, u8 *sts, u32 size);
	int (*update_edid)(struct dp_panel *dp_panel, struct edid *edid);
	bool (*read_mst_cap)(struct dp_panel *dp_panel);
	void (*convert_to_dp_mode)(struct dp_panel *dp_panel,
		const struct drm_display_mode *drm_mode,
		struct dp_display_mode *dp_mode);
	void (*update_pps)(struct dp_panel *dp_panel, char *pps_cmd);
};

struct dp_tu_calc_input {
	u64 lclk;        /* 162, 270, 540 and 810 */
	u64 pclk_khz;    /* in KHz */
	u64 hactive;     /* active h-width */
	u64 hporch;      /* bp + fp + pulse */
	int nlanes;      /* no.of.lanes */
	int bpp;         /* bits */
	int pixel_enc;   /* 444, 420, 422 */
	int dsc_en;     /* dsc on/off */
	int async_en;   /* async mode */
	int fec_en;     /* fec */
	int compress_ratio; /* 2:1 = 200, 3:1 = 300, 3.75:1 = 375 */
	int num_of_dsc_slices; /* number of slices per line */
};

struct dp_vc_tu_mapping_table {
	u32 vic;
	u8 lanes;
	u8 lrate; /* DP_LINK_RATE -> 162(6), 270(10), 540(20), 810 (30) */
	u8 bpp;
	u32 valid_boundary_link;
	u32 delay_start_link;
	bool boundary_moderation_en;
	u32 valid_lower_boundary_link;
	u32 upper_boundary_count;
	u32 lower_boundary_count;
	u32 tu_size_minus1;
};

/**
 * is_link_rate_valid() - validates the link rate
 * @lane_rate: link rate requested by the sink
 *
 * Returns true if the requested link rate is supported.
 */
static inline bool is_link_rate_valid(u32 bw_code)
{
	return ((bw_code == DP_LINK_BW_1_62) ||
		(bw_code == DP_LINK_BW_2_7) ||
		(bw_code == DP_LINK_BW_5_4) ||
		(bw_code == DP_LINK_BW_8_1));
}

/**
 * dp_link_is_lane_count_valid() - validates the lane count
 * @lane_count: lane count requested by the sink
 *
 * Returns true if the requested lane count is supported.
 */
static inline bool is_lane_count_valid(u32 lane_count)
{
	return (lane_count == DP_LANE_COUNT_1) ||
		(lane_count == DP_LANE_COUNT_2) ||
		(lane_count == DP_LANE_COUNT_4);
}

struct dp_panel *dp_panel_get(struct dp_panel_in *in);
void dp_panel_put(struct dp_panel *dp_panel);
void dp_panel_calc_tu_test(struct dp_tu_calc_input *in,
		struct dp_vc_tu_mapping_table *tu_table);
#endif /* _DP_PANEL_H_ */