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/module.h> 7 #include <drm/drm_edid.h> 8 #include <drm/drm_utils.h> 9 10 struct drm_panel_match { 11 enum dmi_field field; 12 const char * const value; 13 }; 14 15 struct drm_get_panel_backlight_quirk { 16 struct drm_panel_match dmi_match; 17 struct drm_panel_match dmi_match_other; 18 struct drm_edid_ident ident; 19 struct drm_panel_backlight_quirk quirk; 20 }; 21 22 static const struct drm_get_panel_backlight_quirk drm_panel_min_backlight_quirks[] = { 23 /* Lenovo Legion 5 15ARH05, AUX backlight non-functional, force PWM */ 24 { 25 .dmi_match.field = DMI_SYS_VENDOR, 26 .dmi_match.value = "LENOVO", 27 .dmi_match_other.field = DMI_PRODUCT_VERSION, 28 .dmi_match_other.value = "Lenovo Legion 5 15ARH05", 29 .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x08df), 30 .quirk = { .force_pwm = true, }, 31 }, 32 /* 13 inch matte 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', 0x0bca), 37 .ident.name = "NE135FBM-N41", 38 .quirk = { .min_brightness = 1, }, 39 }, 40 /* 13 inch glossy 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', 0x095f), 45 .ident.name = "NE135FBM-N41", 46 .quirk = { .min_brightness = 1, }, 47 }, 48 /* 13 inch 2.8k panel */ 49 { 50 .dmi_match.field = DMI_BOARD_VENDOR, 51 .dmi_match.value = "Framework", 52 .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0cb4), 53 .ident.name = "NE135A1M-NY1", 54 .quirk = { .min_brightness = 1, }, 55 }, 56 /* Steam Deck models */ 57 { 58 .dmi_match.field = DMI_SYS_VENDOR, 59 .dmi_match.value = "Valve", 60 .dmi_match_other.field = DMI_PRODUCT_NAME, 61 .dmi_match_other.value = "Jupiter", 62 .quirk = { .min_brightness = 1, }, 63 }, 64 { 65 .dmi_match.field = DMI_SYS_VENDOR, 66 .dmi_match.value = "Valve", 67 .dmi_match_other.field = DMI_PRODUCT_NAME, 68 .dmi_match_other.value = "Galileo", 69 .quirk = { .min_brightness = 1, }, 70 }, 71 /* Have OLED Panels with brightness issue when last byte is 0/1 */ 72 { 73 .dmi_match.field = DMI_SYS_VENDOR, 74 .dmi_match.value = "AYANEO", 75 .dmi_match_other.field = DMI_PRODUCT_NAME, 76 .dmi_match_other.value = "AYANEO 3", 77 .quirk = { .brightness_mask = 3, }, 78 }, 79 { 80 .dmi_match.field = DMI_SYS_VENDOR, 81 .dmi_match.value = "ZOTAC", 82 .dmi_match_other.field = DMI_BOARD_NAME, 83 .dmi_match_other.value = "G0A1W", 84 .quirk = { .brightness_mask = 3, }, 85 }, 86 { 87 .dmi_match.field = DMI_SYS_VENDOR, 88 .dmi_match.value = "ZOTAC", 89 .dmi_match_other.field = DMI_BOARD_NAME, 90 .dmi_match_other.value = "G1A1W", 91 .quirk = { .brightness_mask = 3, }, 92 }, 93 { 94 .dmi_match.field = DMI_SYS_VENDOR, 95 .dmi_match.value = "ONE-NETBOOK", 96 .dmi_match_other.field = DMI_PRODUCT_NAME, 97 .dmi_match_other.value = "ONEXPLAYER F1Pro", 98 .quirk = { .brightness_mask = 3, }, 99 }, 100 { 101 .dmi_match.field = DMI_SYS_VENDOR, 102 .dmi_match.value = "ONE-NETBOOK", 103 .dmi_match_other.field = DMI_PRODUCT_NAME, 104 .dmi_match_other.value = "ONEXPLAYER F1 EVA-02", 105 .quirk = { .brightness_mask = 3, }, 106 }, 107 }; 108 109 static bool drm_panel_min_backlight_quirk_matches( 110 const struct drm_get_panel_backlight_quirk *quirk, 111 const struct drm_edid *edid) 112 { 113 if (quirk->dmi_match.field && 114 !dmi_match(quirk->dmi_match.field, quirk->dmi_match.value)) 115 return false; 116 117 if (quirk->dmi_match_other.field && 118 !dmi_match(quirk->dmi_match_other.field, 119 quirk->dmi_match_other.value)) 120 return false; 121 122 if (quirk->ident.panel_id && !drm_edid_match(edid, &quirk->ident)) 123 return false; 124 125 return true; 126 } 127 128 /** 129 * drm_get_panel_backlight_quirk - Get backlight quirks for a panel 130 * @edid: EDID of the panel to check 131 * 132 * This function checks for platform specific (e.g. DMI based) quirks 133 * providing info on the minimum backlight brightness for systems where this 134 * cannot be probed correctly from the hard-/firm-ware and other sources. 135 * 136 * Returns: 137 * a drm_panel_backlight_quirk struct if a quirk was found, otherwise an 138 * error pointer. 139 */ 140 const struct drm_panel_backlight_quirk * 141 drm_get_panel_backlight_quirk(const struct drm_edid *edid) 142 { 143 const struct drm_get_panel_backlight_quirk *quirk; 144 size_t i; 145 146 if (!IS_ENABLED(CONFIG_DMI)) 147 return ERR_PTR(-ENODATA); 148 149 if (!edid) 150 return ERR_PTR(-EINVAL); 151 152 for (i = 0; i < ARRAY_SIZE(drm_panel_min_backlight_quirks); i++) { 153 quirk = &drm_panel_min_backlight_quirks[i]; 154 155 if (drm_panel_min_backlight_quirk_matches(quirk, edid)) 156 return &quirk->quirk; 157 } 158 159 return ERR_PTR(-ENODATA); 160 } 161 EXPORT_SYMBOL(drm_get_panel_backlight_quirk); 162 163 MODULE_DESCRIPTION("Quirks for panel backlight overrides"); 164 MODULE_LICENSE("GPL"); 165