1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * drm_panel_orientation_quirks.c -- Quirks for non-normal panel orientation 4 * 5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> 6 * 7 * Note the quirks in this file are shared with fbdev/efifb and as such 8 * must not depend on other drm code. 9 */ 10 11 #include <linux/dmi.h> 12 #include <linux/module.h> 13 #include <drm/drm_connector.h> 14 15 #ifdef CONFIG_DMI 16 17 /* 18 * Some x86 clamshell design devices use portrait tablet screens and a display 19 * engine which cannot rotate in hardware, so we need to rotate the fbcon to 20 * compensate. Unfortunately these (cheap) devices also typically have quite 21 * generic DMI data, so we match on a combination of DMI data, screen resolution 22 * and a list of known BIOS dates to avoid false positives. 23 */ 24 25 struct drm_dmi_panel_orientation_data { 26 int width; 27 int height; 28 const char * const *bios_dates; 29 int orientation; 30 }; 31 32 static const struct drm_dmi_panel_orientation_data asus_t100ha = { 33 .width = 800, 34 .height = 1280, 35 .orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP, 36 }; 37 38 static const struct drm_dmi_panel_orientation_data gpd_pocket = { 39 .width = 1200, 40 .height = 1920, 41 .bios_dates = (const char * const []){ "05/26/2017", "06/28/2017", 42 "07/05/2017", "08/07/2017", NULL }, 43 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 44 }; 45 46 static const struct drm_dmi_panel_orientation_data gpd_win = { 47 .width = 720, 48 .height = 1280, 49 .bios_dates = (const char * const []){ 50 "10/25/2016", "11/18/2016", "12/23/2016", "12/26/2016", 51 "02/21/2017", "03/20/2017", "05/25/2017", NULL }, 52 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 53 }; 54 55 static const struct drm_dmi_panel_orientation_data itworks_tw891 = { 56 .width = 800, 57 .height = 1280, 58 .bios_dates = (const char * const []){ "10/16/2015", NULL }, 59 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 60 }; 61 62 static const struct drm_dmi_panel_orientation_data vios_lth17 = { 63 .width = 800, 64 .height = 1280, 65 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 66 }; 67 68 static const struct dmi_system_id orientation_data[] = { 69 { /* Asus T100HA */ 70 .matches = { 71 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 72 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100HAN"), 73 }, 74 .driver_data = (void *)&asus_t100ha, 75 }, { /* 76 * GPD Pocket, note that the the DMI data is less generic then 77 * it seems, devices with a board-vendor of "AMI Corporation" 78 * are quite rare, as are devices which have both board- *and* 79 * product-id set to "Default String" 80 */ 81 .matches = { 82 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 83 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 84 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 85 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 86 }, 87 .driver_data = (void *)&gpd_pocket, 88 }, { /* GPD Win (same note on DMI match as GPD Pocket) */ 89 .matches = { 90 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 91 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 92 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 93 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 94 }, 95 .driver_data = (void *)&gpd_win, 96 }, { /* I.T.Works TW891 */ 97 .matches = { 98 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "To be filled by O.E.M."), 99 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "TW891"), 100 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."), 101 DMI_EXACT_MATCH(DMI_BOARD_NAME, "TW891"), 102 }, 103 .driver_data = (void *)&itworks_tw891, 104 }, { /* VIOS LTH17 */ 105 .matches = { 106 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "VIOS"), 107 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LTH17"), 108 }, 109 .driver_data = (void *)&vios_lth17, 110 }, 111 {} 112 }; 113 114 /** 115 * drm_get_panel_orientation_quirk - Check for panel orientation quirks 116 * @width: width in pixels of the panel 117 * @height: height in pixels of the panel 118 * 119 * This function checks for platform specific (e.g. DMI based) quirks 120 * providing info on panel_orientation for systems where this cannot be 121 * probed from the hard-/firm-ware. To avoid false-positive this function 122 * takes the panel resolution as argument and checks that against the 123 * resolution expected by the quirk-table entry. 124 * 125 * Note this function is also used outside of the drm-subsys, by for example 126 * the efifb code. Because of this this function gets compiled into its own 127 * kernel-module when built as a module. 128 * 129 * Returns: 130 * A DRM_MODE_PANEL_ORIENTATION_* value if there is a quirk for this system, 131 * or DRM_MODE_PANEL_ORIENTATION_UNKNOWN if there is no quirk. 132 */ 133 int drm_get_panel_orientation_quirk(int width, int height) 134 { 135 const struct dmi_system_id *match; 136 const struct drm_dmi_panel_orientation_data *data; 137 const char *bios_date; 138 int i; 139 140 for (match = dmi_first_match(orientation_data); 141 match; 142 match = dmi_first_match(match + 1)) { 143 data = match->driver_data; 144 145 if (data->width != width || 146 data->height != height) 147 continue; 148 149 if (!data->bios_dates) 150 return data->orientation; 151 152 bios_date = dmi_get_system_info(DMI_BIOS_DATE); 153 if (!bios_date) 154 continue; 155 156 for (i = 0; data->bios_dates[i]; i++) { 157 if (!strcmp(data->bios_dates[i], bios_date)) 158 return data->orientation; 159 } 160 } 161 162 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 163 } 164 EXPORT_SYMBOL(drm_get_panel_orientation_quirk); 165 166 #else 167 168 /* There are no quirks for non x86 devices yet */ 169 int drm_get_panel_orientation_quirk(int width, int height) 170 { 171 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 172 } 173 EXPORT_SYMBOL(drm_get_panel_orientation_quirk); 174 175 #endif 176 177 MODULE_LICENSE("Dual MIT/GPL"); 178