1 /* SPDX-License-Identifier: MIT */
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.
11 #include <linux/dmi.h>
12 #include <linux/module.h>
13 #include <drm/drm_connector.h>
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
{
28 const char * const *bios_dates
;
32 static const struct drm_dmi_panel_orientation_data asus_t100ha
= {
35 .orientation
= DRM_MODE_PANEL_ORIENTATION_LEFT_UP
,
38 static const struct drm_dmi_panel_orientation_data gpd_pocket
= {
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
= {
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
= {
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
= {
65 .orientation
= DRM_MODE_PANEL_ORIENTATION_RIGHT_UP
,
68 static const struct dmi_system_id orientation_data
[] = {
71 DMI_EXACT_MATCH(DMI_SYS_VENDOR
, "ASUSTeK COMPUTER INC."),
72 DMI_EXACT_MATCH(DMI_PRODUCT_NAME
, "T100HAN"),
74 .driver_data
= (void *)&asus_t100ha
,
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"
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) */
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 */
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 */
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.
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
;
140 for (match
= dmi_first_match(orientation_data
);
142 match
= dmi_first_match(match
+ 1)) {
143 data
= match
->driver_data
;
145 if (data
->width
!= width
||
146 data
->height
!= height
)
149 if (!data
->bios_dates
)
150 return data
->orientation
;
152 bios_date
= dmi_get_system_info(DMI_BIOS_DATE
);
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
);
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
);
177 MODULE_LICENSE("Dual MIT/GPL");