1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbcon_dmi_quirks.c b/drivers/video/fbdev/core/fbcon_dmi_quirks.c
new file mode 100644
index 000000000000..6904e47d1e51
--- /dev/null
+++ b/drivers/video/fbdev/core/fbcon_dmi_quirks.c
@@ -0,0 +1,145 @@
+/*
+ *  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;
+}