1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/array_size.h> 4 #include <linux/dmi.h> 5 #include <linux/export.h> 6 #include <linux/mod_devicetable.h> 7 #include <linux/module.h> 8 #include <drm/drm_edid.h> 9 #include <drm/drm_utils.h> 10 11 struct drm_panel_match { 12 enum dmi_field field; 13 const char * const value; 14 }; 15 16 struct drm_get_panel_backlight_quirk { 17 struct drm_panel_match dmi_match; 18 struct drm_panel_match dmi_match_other; 19 struct drm_edid_ident ident; 20 struct drm_panel_backlight_quirk quirk; 21 }; 22 23 static const struct drm_get_panel_backlight_quirk drm_panel_min_backlight_quirks[] = { 24 /* 13 inch matte panel */ 25 { 26 .dmi_match.field = DMI_BOARD_VENDOR, 27 .dmi_match.value = "Framework", 28 .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0bca), 29 .ident.name = "NE135FBM-N41", 30 .quirk = { .min_brightness = 1, }, 31 }, 32 /* 13 inch glossy panel */ 33 { 34 .dmi_match.field = DMI_BOARD_VENDOR, 35 .dmi_match.value = "Framework", 36 .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x095f), 37 .ident.name = "NE135FBM-N41", 38 .quirk = { .min_brightness = 1, }, 39 }, 40 /* 13 inch 2.8k panel */ 41 { 42 .dmi_match.field = DMI_BOARD_VENDOR, 43 .dmi_match.value = "Framework", 44 .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0cb4), 45 .ident.name = "NE135A1M-NY1", 46 .quirk = { .min_brightness = 1, }, 47 }, 48 /* Steam Deck models */ 49 { 50 .dmi_match.field = DMI_SYS_VENDOR, 51 .dmi_match.value = "Valve", 52 .dmi_match_other.field = DMI_PRODUCT_NAME, 53 .dmi_match_other.value = "Jupiter", 54 .quirk = { .min_brightness = 1, }, 55 }, 56 { 57 .dmi_match.field = DMI_SYS_VENDOR, 58 .dmi_match.value = "Valve", 59 .dmi_match_other.field = DMI_PRODUCT_NAME, 60 .dmi_match_other.value = "Galileo", 61 .quirk = { .min_brightness = 1, }, 62 }, 63 /* Have OLED Panels with brightness issue when last byte is 0/1 */ 64 { 65 .dmi_match.field = DMI_SYS_VENDOR, 66 .dmi_match.value = "AYANEO", 67 .dmi_match_other.field = DMI_PRODUCT_NAME, 68 .dmi_match_other.value = "AYANEO 3", 69 .quirk = { .brightness_mask = 3, }, 70 }, 71 { 72 .dmi_match.field = DMI_SYS_VENDOR, 73 .dmi_match.value = "ZOTAC", 74 .dmi_match_other.field = DMI_BOARD_NAME, 75 .dmi_match_other.value = "G0A1W", 76 .quirk = { .brightness_mask = 3, }, 77 }, 78 { 79 .dmi_match.field = DMI_SYS_VENDOR, 80 .dmi_match.value = "ZOTAC", 81 .dmi_match_other.field = DMI_BOARD_NAME, 82 .dmi_match_other.value = "G1A1W", 83 .quirk = { .brightness_mask = 3, }, 84 }, 85 { 86 .dmi_match.field = DMI_SYS_VENDOR, 87 .dmi_match.value = "ONE-NETBOOK", 88 .dmi_match_other.field = DMI_PRODUCT_NAME, 89 .dmi_match_other.value = "ONEXPLAYER F1Pro", 90 .quirk = { .brightness_mask = 3, }, 91 }, 92 { 93 .dmi_match.field = DMI_SYS_VENDOR, 94 .dmi_match.value = "ONE-NETBOOK", 95 .dmi_match_other.field = DMI_PRODUCT_NAME, 96 .dmi_match_other.value = "ONEXPLAYER F1 EVA-02", 97 .quirk = { .brightness_mask = 3, }, 98 }, 99 }; 100 101 static bool drm_panel_min_backlight_quirk_matches( 102 const struct drm_get_panel_backlight_quirk *quirk, 103 const struct drm_edid *edid) 104 { 105 if (quirk->dmi_match.field && 106 !dmi_match(quirk->dmi_match.field, quirk->dmi_match.value)) 107 return false; 108 109 if (quirk->dmi_match_other.field && 110 !dmi_match(quirk->dmi_match_other.field, 111 quirk->dmi_match_other.value)) 112 return false; 113 114 if (quirk->ident.panel_id && !drm_edid_match(edid, &quirk->ident)) 115 return false; 116 117 return true; 118 } 119 120 /** 121 * drm_get_panel_backlight_quirk - Get backlight quirks for a panel 122 * @edid: EDID of the panel to check 123 * 124 * This function checks for platform specific (e.g. DMI based) quirks 125 * providing info on the minimum backlight brightness for systems where this 126 * cannot be probed correctly from the hard-/firm-ware and other sources. 127 * 128 * Returns: 129 * a drm_panel_backlight_quirk struct if a quirk was found, otherwise an 130 * error pointer. 131 */ 132 const struct drm_panel_backlight_quirk * 133 drm_get_panel_backlight_quirk(const struct drm_edid *edid) 134 { 135 const struct drm_get_panel_backlight_quirk *quirk; 136 size_t i; 137 138 if (!IS_ENABLED(CONFIG_DMI)) 139 return ERR_PTR(-ENODATA); 140 141 if (!edid) 142 return ERR_PTR(-EINVAL); 143 144 for (i = 0; i < ARRAY_SIZE(drm_panel_min_backlight_quirks); i++) { 145 quirk = &drm_panel_min_backlight_quirks[i]; 146 147 if (drm_panel_min_backlight_quirk_matches(quirk, edid)) 148 return &quirk->quirk; 149 } 150 151 return ERR_PTR(-ENODATA); 152 } 153 EXPORT_SYMBOL(drm_get_panel_backlight_quirk); 154 155 MODULE_DESCRIPTION("Quirks for panel backlight overrides"); 156 MODULE_LICENSE("GPL"); 157