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 */
drm_get_panel_orientation_quirk(int width,int height)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 */
drm_get_panel_orientation_quirk(int width,int height)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
