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 lcd800x1280_rightside_up = { 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 }, { /* 106 * Lenovo Ideapad Miix 310 laptop, only some production batches 107 * have a portrait screen, the resolution checks makes the quirk 108 * apply only to those batches. 109 */ 110 .matches = { 111 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), 112 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80SG"), 113 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"), 114 }, 115 .driver_data = (void *)&lcd800x1280_rightside_up, 116 }, { /* Lenovo Ideapad Miix 320 */ 117 .matches = { 118 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), 119 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"), 120 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), 121 }, 122 .driver_data = (void *)&lcd800x1280_rightside_up, 123 }, { /* VIOS LTH17 */ 124 .matches = { 125 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "VIOS"), 126 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LTH17"), 127 }, 128 .driver_data = (void *)&lcd800x1280_rightside_up, 129 }, 130 {} 131 }; 132 133 /** 134 * drm_get_panel_orientation_quirk - Check for panel orientation quirks 135 * @width: width in pixels of the panel 136 * @height: height in pixels of the panel 137 * 138 * This function checks for platform specific (e.g. DMI based) quirks 139 * providing info on panel_orientation for systems where this cannot be 140 * probed from the hard-/firm-ware. To avoid false-positive this function 141 * takes the panel resolution as argument and checks that against the 142 * resolution expected by the quirk-table entry. 143 * 144 * Note this function is also used outside of the drm-subsys, by for example 145 * the efifb code. Because of this this function gets compiled into its own 146 * kernel-module when built as a module. 147 * 148 * Returns: 149 * A DRM_MODE_PANEL_ORIENTATION_* value if there is a quirk for this system, 150 * or DRM_MODE_PANEL_ORIENTATION_UNKNOWN if there is no quirk. 151 */ 152 int drm_get_panel_orientation_quirk(int width, int height) 153 { 154 const struct dmi_system_id *match; 155 const struct drm_dmi_panel_orientation_data *data; 156 const char *bios_date; 157 int i; 158 159 for (match = dmi_first_match(orientation_data); 160 match; 161 match = dmi_first_match(match + 1)) { 162 data = match->driver_data; 163 164 if (data->width != width || 165 data->height != height) 166 continue; 167 168 if (!data->bios_dates) 169 return data->orientation; 170 171 bios_date = dmi_get_system_info(DMI_BIOS_DATE); 172 if (!bios_date) 173 continue; 174 175 i = match_string(data->bios_dates, -1, bios_date); 176 if (i >= 0) 177 return data->orientation; 178 } 179 180 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 181 } 182 EXPORT_SYMBOL(drm_get_panel_orientation_quirk); 183 184 #else 185 186 /* There are no quirks for non x86 devices yet */ 187 int drm_get_panel_orientation_quirk(int width, int height) 188 { 189 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 190 } 191 EXPORT_SYMBOL(drm_get_panel_orientation_quirk); 192 193 #endif 194 195 MODULE_LICENSE("Dual MIT/GPL"); 196