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_psr { 38 u8 version; 39 u8 capabilities; 40 }; 41 42 struct dp_panel { 43 /* dpcd raw data */ 44 u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; 45 u8 ds_cap_info[DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE]; 46 u32 ds_port_cnt; 47 u32 dfp_present; 48 49 struct dp_link_info link_info; 50 struct drm_dp_desc desc; 51 struct edid *edid; 52 struct drm_connector *connector; 53 struct dp_display_mode dp_mode; 54 struct dp_panel_psr psr_cap; 55 bool video_test; 56 57 u32 vic; 58 u32 max_dp_lanes; 59 u32 max_dp_link_rate; 60 61 u32 max_bw_code; 62 }; 63 64 int dp_panel_init_panel_info(struct dp_panel *dp_panel); 65 int dp_panel_deinit(struct dp_panel *dp_panel); 66 int dp_panel_timing_cfg(struct dp_panel *dp_panel); 67 void dp_panel_dump_regs(struct dp_panel *dp_panel); 68 int dp_panel_read_sink_caps(struct dp_panel *dp_panel, 69 struct drm_connector *connector); 70 u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, u32 mode_max_bpp, 71 u32 mode_pclk_khz); 72 int dp_panel_get_modes(struct dp_panel *dp_panel, 73 struct drm_connector *connector); 74 void dp_panel_handle_sink_request(struct dp_panel *dp_panel); 75 void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable); 76 77 /** 78 * is_link_rate_valid() - validates the link rate 79 * @lane_rate: link rate requested by the sink 80 * 81 * Returns true if the requested link rate is supported. 82 */ 83 static inline bool is_link_rate_valid(u32 bw_code) 84 { 85 return (bw_code == DP_LINK_BW_1_62 || 86 bw_code == DP_LINK_BW_2_7 || 87 bw_code == DP_LINK_BW_5_4 || 88 bw_code == DP_LINK_BW_8_1); 89 } 90 91 /** 92 * dp_link_is_lane_count_valid() - validates the lane count 93 * @lane_count: lane count requested by the sink 94 * 95 * Returns true if the requested lane count is supported. 96 */ 97 static inline bool is_lane_count_valid(u32 lane_count) 98 { 99 return (lane_count == 1 || 100 lane_count == 2 || 101 lane_count == 4); 102 } 103 104 struct dp_panel *dp_panel_get(struct dp_panel_in *in); 105 void dp_panel_put(struct dp_panel *dp_panel); 106 #endif /* _DP_PANEL_H_ */ 107