Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / gpu / drm / drm_panel_orientation_quirks.c
blob1f2af707ce03e9670fec85a779404f70fcf29585
1 /* SPDX-License-Identifier: MIT */
2 /*
3 * drm_panel_orientation_quirks.c -- Quirks for non-normal panel orientation
5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
7 * Note the quirks in this file are shared with fbdev/efifb and as such
8 * must not depend on other drm code.
9 */
11 #include <linux/dmi.h>
12 #include <linux/module.h>
13 #include <drm/drm_connector.h>
15 #ifdef CONFIG_DMI
18 * Some x86 clamshell design devices use portrait tablet screens and a display
19 * engine which cannot rotate in hardware, so we need to rotate the fbcon to
20 * compensate. Unfortunately these (cheap) devices also typically have quite
21 * generic DMI data, so we match on a combination of DMI data, screen resolution
22 * and a list of known BIOS dates to avoid false positives.
25 struct drm_dmi_panel_orientation_data {
26 int width;
27 int height;
28 const char * const *bios_dates;
29 int orientation;
32 static const struct drm_dmi_panel_orientation_data asus_t100ha = {
33 .width = 800,
34 .height = 1280,
35 .orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP,
38 static const struct drm_dmi_panel_orientation_data gpd_pocket = {
39 .width = 1200,
40 .height = 1920,
41 .bios_dates = (const char * const []){ "05/26/2017", "06/28/2017",
42 "07/05/2017", "08/07/2017", NULL },
43 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
46 static const struct drm_dmi_panel_orientation_data gpd_win = {
47 .width = 720,
48 .height = 1280,
49 .bios_dates = (const char * const []){
50 "10/25/2016", "11/18/2016", "12/23/2016", "12/26/2016",
51 "02/21/2017", "03/20/2017", "05/25/2017", NULL },
52 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
55 static const struct drm_dmi_panel_orientation_data itworks_tw891 = {
56 .width = 800,
57 .height = 1280,
58 .bios_dates = (const char * const []){ "10/16/2015", NULL },
59 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
62 static const struct drm_dmi_panel_orientation_data vios_lth17 = {
63 .width = 800,
64 .height = 1280,
65 .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
68 static const struct dmi_system_id orientation_data[] = {
69 { /* Asus T100HA */
70 .matches = {
71 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
72 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100HAN"),
74 .driver_data = (void *)&asus_t100ha,
75 }, { /*
76 * GPD Pocket, note that the the DMI data is less generic then
77 * it seems, devices with a board-vendor of "AMI Corporation"
78 * are quite rare, as are devices which have both board- *and*
79 * product-id set to "Default String"
81 .matches = {
82 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
83 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
84 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
85 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
87 .driver_data = (void *)&gpd_pocket,
88 }, { /* GPD Win (same note on DMI match as GPD Pocket) */
89 .matches = {
90 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
91 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
92 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
93 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
95 .driver_data = (void *)&gpd_win,
96 }, { /* I.T.Works TW891 */
97 .matches = {
98 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "To be filled by O.E.M."),
99 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "TW891"),
100 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
101 DMI_EXACT_MATCH(DMI_BOARD_NAME, "TW891"),
103 .driver_data = (void *)&itworks_tw891,
104 }, { /* VIOS LTH17 */
105 .matches = {
106 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "VIOS"),
107 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LTH17"),
109 .driver_data = (void *)&vios_lth17,
115 * drm_get_panel_orientation_quirk - Check for panel orientation quirks
116 * @width: width in pixels of the panel
117 * @height: height in pixels of the panel
119 * This function checks for platform specific (e.g. DMI based) quirks
120 * providing info on panel_orientation for systems where this cannot be
121 * probed from the hard-/firm-ware. To avoid false-positive this function
122 * takes the panel resolution as argument and checks that against the
123 * resolution expected by the quirk-table entry.
125 * Note this function is also used outside of the drm-subsys, by for example
126 * the efifb code. Because of this this function gets compiled into its own
127 * kernel-module when built as a module.
129 * Returns:
130 * A DRM_MODE_PANEL_ORIENTATION_* value if there is a quirk for this system,
131 * or DRM_MODE_PANEL_ORIENTATION_UNKNOWN if there is no quirk.
133 int drm_get_panel_orientation_quirk(int width, int height)
135 const struct dmi_system_id *match;
136 const struct drm_dmi_panel_orientation_data *data;
137 const char *bios_date;
138 int i;
140 for (match = dmi_first_match(orientation_data);
141 match;
142 match = dmi_first_match(match + 1)) {
143 data = match->driver_data;
145 if (data->width != width ||
146 data->height != height)
147 continue;
149 if (!data->bios_dates)
150 return data->orientation;
152 bios_date = dmi_get_system_info(DMI_BIOS_DATE);
153 if (!bios_date)
154 continue;
156 for (i = 0; data->bios_dates[i]; i++) {
157 if (!strcmp(data->bios_dates[i], bios_date))
158 return data->orientation;
162 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
164 EXPORT_SYMBOL(drm_get_panel_orientation_quirk);
166 #else
168 /* There are no quirks for non x86 devices yet */
169 int drm_get_panel_orientation_quirk(int width, int height)
171 return DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
173 EXPORT_SYMBOL(drm_get_panel_orientation_quirk);
175 #endif
177 MODULE_LICENSE("Dual MIT/GPL");