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 15 struct edid; 16 17 #define DPRX_EXTENDED_DPCD_FIELD 0x2200 18 19 #define DP_DOWNSTREAM_PORTS 4 20 #define DP_DOWNSTREAM_CAP_SIZE 4 21 22 struct 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 30 struct 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 37 struct 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 58 int dp_panel_init_panel_info(struct dp_panel *dp_panel); 59 int dp_panel_deinit(struct dp_panel *dp_panel); 60 int dp_panel_timing_cfg(struct dp_panel *dp_panel); 61 void dp_panel_dump_regs(struct dp_panel *dp_panel); 62 int dp_panel_read_sink_caps(struct dp_panel *dp_panel, 63 struct drm_connector *connector); 64 u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, u32 mode_max_bpp, 65 u32 mode_pclk_khz); 66 int dp_panel_get_modes(struct dp_panel *dp_panel, 67 struct drm_connector *connector, struct dp_display_mode *mode); 68 void dp_panel_handle_sink_request(struct dp_panel *dp_panel); 69 void 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 */ 77 static 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 */ 91 static 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 98 struct dp_panel *dp_panel_get(struct dp_panel_in *in); 99 void dp_panel_put(struct dp_panel *dp_panel); 100 #endif /* _DP_PANEL_H_ */ 101