xref: /linux/drivers/gpu/drm/drm_panel_backlight_quirks.c (revision 07fdad3a93756b872da7b53647715c48d0f4a2d0)
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