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 #include <drm/drm_utils.h> 15 16 #ifdef CONFIG_DMI 17 18 /* 19 * Some x86 clamshell design devices use portrait tablet screens and a display 20 * engine which cannot rotate in hardware, so we need to rotate the fbcon to 21 * compensate. Unfortunately these (cheap) devices also typically have quite 22 * generic DMI data, so we match on a combination of DMI data, screen resolution 23 * and a list of known BIOS dates to avoid false positives. 24 */ 25 26 struct drm_dmi_panel_orientation_data { 27 int width; 28 int height; 29 const char * const *bios_dates; 30 int orientation; 31 }; 32 33 static const struct drm_dmi_panel_orientation_data asus_t100ha = { 34 .width = 800, 35 .height = 1280, 36 .orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP, 37 }; 38 39 static const struct drm_dmi_panel_orientation_data gpd_pocket = { 40 .width = 1200, 41 .height = 1920, 42 .bios_dates = (const char * const []){ "05/26/2017", "06/28/2017", 43 "07/05/2017", "08/07/2017", NULL }, 44 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 45 }; 46 47 static const struct drm_dmi_panel_orientation_data gpd_win = { 48 .width = 720, 49 .height = 1280, 50 .bios_dates = (const char * const []){ 51 "10/25/2016", "11/18/2016", "12/23/2016", "12/26/2016", 52 "02/21/2017", "03/20/2017", "05/25/2017", NULL }, 53 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 54 }; 55 56 static const struct drm_dmi_panel_orientation_data itworks_tw891 = { 57 .width = 800, 58 .height = 1280, 59 .bios_dates = (const char * const []){ "10/16/2015", NULL }, 60 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 61 }; 62 63 static const struct drm_dmi_panel_orientation_data vios_lth17 = { 64 .width = 800, 65 .height = 1280, 66 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 67 }; 68 69 static const struct dmi_system_id orientation_data[] = { 70 { /* Asus T100HA */ 71 .matches = { 72 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 73 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100HAN"), 74 }, 75 .driver_data = (void *)&asus_t100ha, 76 }, { /* 77 * GPD Pocket, note that the the DMI data is less generic then 78 * it seems, devices with a board-vendor of "AMI Corporation" 79 * are quite rare, as are devices which have both board- *and* 80 * product-id set to "Default String" 81 */ 82 .matches = { 83 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 84 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 85 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 86 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 87 }, 88 .driver_data = (void *)&gpd_pocket, 89 }, { /* GPD Win (same note on DMI match as GPD Pocket) */ 90 .matches = { 91 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 92 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 93 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 94 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 95 }, 96 .driver_data = (void *)&gpd_win, 97 }, { /* I.T.Works TW891 */ 98 .matches = { 99 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "To be filled by O.E.M."), 100 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "TW891"), 101 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."), 102 DMI_EXACT_MATCH(DMI_BOARD_NAME, "TW891"), 103 }, 104 .driver_data = (void *)&itworks_tw891, 105 }, { /* VIOS LTH17 */ 106 .matches = { 107 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "VIOS"), 108 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LTH17"), 109 }, 110 .driver_data = (void *)&vios_lth17, 111 }, 112 {} 113 }; 114 115 /** 116 * drm_get_panel_orientation_quirk - Check for panel orientation quirks 117 * @width: width in pixels of the panel 118 * @height: height in pixels of the panel 119 * 120 * This function checks for platform specific (e.g. DMI based) quirks 121 * providing info on panel_orientation for systems where this cannot be 122 * probed from the hard-/firm-ware. To avoid false-positive this function 123 * takes the panel resolution as argument and checks that against the 124 * resolution expected by the quirk-table entry. 125 * 126 * Note this function is also used outside of the drm-subsys, by for example 127 * the efifb code. Because of this this function gets compiled into its own 128 * kernel-module when built as a module. 129 * 130 * Returns: 131 * A DRM_MODE_PANEL_ORIENTATION_* value if there is a quirk for this system, 132 * or DRM_MODE_PANEL_ORIENTATION_UNKNOWN if there is no quirk. 133 */ 134 int drm_get_panel_orientation_quirk(int width, int height) 135 { 136 const struct dmi_system_id *match; 137 const struct drm_dmi_panel_orientation_data *data; 138 const char *bios_date; 139 int i; 140 141 for (match = dmi_first_match(orientation_data); 142 match; 143 match = dmi_first_match(match + 1)) { 144 data = match->driver_data; 145 146 if (data->width != width || 147 data->height != height) 148 continue; 149 150 if (!data->bios_dates) 151 return data->orientation; 152 153 bios_date = dmi_get_system_info(DMI_BIOS_DATE); 154 if (!bios_date) 155 continue; 156 157 for (i = 0; data->bios_dates[i]; i++) { 158 if (!strcmp(data->bios_dates[i], bios_date)) 159 return data->orientation; 160 } 161 } 162 163 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 164 } 165 EXPORT_SYMBOL(drm_get_panel_orientation_quirk); 166 167 #else 168 169 /* There are no quirks for non x86 devices yet */ 170 int drm_get_panel_orientation_quirk(int width, int height) 171 { 172 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 173 } 174 EXPORT_SYMBOL(drm_get_panel_orientation_quirk); 175 176 #endif 177 178 MODULE_LICENSE("Dual MIT/GPL"); 179