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/*
* fbcon_dmi_quirks.c -- DMI based quirk detection for fbcon
*
* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/dmi.h>
#include <linux/fb.h>
#include <linux/kernel.h>
#include "fbcon.h"
/*
* Some x86 clamshell design devices use portrait tablet screens and a display
* engine which cannot rotate in hardware, so we need to rotate the fbcon to
* compensate. Unfortunately these (cheap) devices also typically have quite
* generic DMI data, so we match on a combination of DMI data, screen resolution
* and a list of known BIOS dates to avoid false positives.
*/
struct fbcon_dmi_rotate_data {
int width;
int height;
const char * const *bios_dates;
int rotate;
};
static const struct fbcon_dmi_rotate_data rotate_data_asus_t100ha = {
.width = 800,
.height = 1280,
.rotate = FB_ROTATE_CCW,
};
static const struct fbcon_dmi_rotate_data rotate_data_gpd_pocket = {
.width = 1200,
.height = 1920,
.bios_dates = (const char * const []){ "05/26/2017", "06/28/2017",
"07/05/2017", "08/07/2017", NULL },
.rotate = FB_ROTATE_CW,
};
static const struct fbcon_dmi_rotate_data rotate_data_gpd_win = {
.width = 720,
.height = 1280,
.bios_dates = (const char * const []){
"10/25/2016", "11/18/2016", "12/23/2016", "12/26/2016",
"02/21/2017", "03/20/2017", "05/25/2017", NULL },
.rotate = FB_ROTATE_CW,
};
static const struct fbcon_dmi_rotate_data rotate_data_itworks_tw891 = {
.width = 800,
.height = 1280,
.bios_dates = (const char * const []){ "10/16/2015", NULL },
.rotate = FB_ROTATE_CW,
};
static const struct fbcon_dmi_rotate_data rotate_data_vios_lth17 = {
.width = 800,
.height = 1280,
.rotate = FB_ROTATE_CW,
};
static const struct dmi_system_id rotate_data[] = {
{ /* Asus T100HA */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100HAN"),
},
.driver_data = (void *)&rotate_data_asus_t100ha,
}, { /*
* GPD Pocket, note that the the DMI data is less generic then
* it seems, devices with a board-vendor of "AMI Corporation"
* are quite rare, as are devices which have both board- *and*
* product-id set to "Default String"
*/
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
},
.driver_data = (void *)&rotate_data_gpd_pocket,
}, { /* GPD Win (same note on DMI match as GPD Pocket) */
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
},
.driver_data = (void *)&rotate_data_gpd_win,
}, { /* I.T.Works TW891 */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "To be filled by O.E.M."),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "TW891"),
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "TW891"),
},
.driver_data = (void *)&rotate_data_itworks_tw891,
}, { /* VIOS LTH17 */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "VIOS"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "LTH17"),
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "VIOS"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "LTH17"),
},
.driver_data = (void *)&rotate_data_vios_lth17,
},
{}
};
int fbcon_platform_get_rotate(struct fb_info *info)
{
const struct dmi_system_id *match;
const struct fbcon_dmi_rotate_data *data;
const char *bios_date;
int i;
for (match = dmi_first_match(rotate_data);
match;
match = dmi_first_match(match + 1)) {
data = match->driver_data;
if (data->width != info->var.xres ||
data->height != info->var.yres)
continue;
if (!data->bios_dates)
return data->rotate;
bios_date = dmi_get_system_info(DMI_BIOS_DATE);
if (!bios_date)
continue;
for (i = 0; data->bios_dates[i]; i++) {
if (!strcmp(data->bios_dates[i], bios_date))
return data->rotate;
}
}
return FB_ROTATE_UR;
}
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