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 14 struct edid; 15 16 #define DPRX_EXTENDED_DPCD_FIELD 0x2200 17 18 #define DP_DOWNSTREAM_PORTS 4 19 #define DP_DOWNSTREAM_CAP_SIZE 4 20 21 struct dp_display_mode { 22 struct drm_display_mode drm_mode; 23 u32 capabilities; 24 u32 bpp; 25 u32 h_active_low; 26 u32 v_active_low; 27 }; 28 29 struct dp_panel_in { 30 struct device *dev; 31 struct drm_dp_aux *aux; 32 struct dp_link *link; 33 struct dp_catalog *catalog; 34 }; 35 36 struct dp_panel_psr { 37 u8 version; 38 u8 capabilities; 39 }; 40 41 struct dp_panel { 42 /* dpcd raw data */ 43 u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; 44 u8 ds_cap_info[DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE]; 45 u32 ds_port_cnt; 46 u32 dfp_present; 47 48 struct dp_link_info link_info; 49 struct drm_dp_desc desc; 50 struct edid *edid; 51 struct drm_connector *connector; 52 struct dp_display_mode dp_mode; 53 struct dp_panel_psr psr_cap; 54 bool video_test; 55 56 u32 vic; 57 u32 max_dp_lanes; 58 u32 max_dp_link_rate; 59 60 u32 max_bw_code; 61 }; 62 63 int dp_panel_init_panel_info(struct dp_panel *dp_panel); 64 int dp_panel_deinit(struct dp_panel *dp_panel); 65 int dp_panel_timing_cfg(struct dp_panel *dp_panel); 66 void dp_panel_dump_regs(struct dp_panel *dp_panel); 67 int dp_panel_read_sink_caps(struct dp_panel *dp_panel, 68 struct drm_connector *connector); 69 u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel, u32 mode_max_bpp, 70 u32 mode_pclk_khz); 71 int dp_panel_get_modes(struct dp_panel *dp_panel, 72 struct drm_connector *connector); 73 void dp_panel_handle_sink_request(struct dp_panel *dp_panel); 74 void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable); 75 76 /** 77 * is_link_rate_valid() - validates the link rate 78 * @lane_rate: link rate requested by the sink 79 * 80 * Returns true if the requested link rate is supported. 81 */ 82 static inline bool is_link_rate_valid(u32 bw_code) 83 { 84 return (bw_code == DP_LINK_BW_1_62 || 85 bw_code == DP_LINK_BW_2_7 || 86 bw_code == DP_LINK_BW_5_4 || 87 bw_code == DP_LINK_BW_8_1); 88 } 89 90 /** 91 * dp_link_is_lane_count_valid() - validates the lane count 92 * @lane_count: lane count requested by the sink 93 * 94 * Returns true if the requested lane count is supported. 95 */ 96 static inline bool is_lane_count_valid(u32 lane_count) 97 { 98 return (lane_count == 1 || 99 lane_count == 2 || 100 lane_count == 4); 101 } 102 103 struct dp_panel *dp_panel_get(struct dp_panel_in *in); 104 void dp_panel_put(struct dp_panel *dp_panel); 105 #endif /* _DP_PANEL_H_ */ 106