video/console: Add dmi quirk table for x86 systems which need fbcon rotation (b0d8e409) · Commits · 戴 / test

drivers/video/fbdev/core/Makefile

+3 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,9 @@ ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y)
		fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \
		fbcon_ccw.o
		endif
		ifeq ($(CONFIG_DMI),y)
		fb-y += fbcon_dmi_quirks.o
		endif
		endif
		fb-objs := $(fb-y)

drivers/video/fbdev/core/fbcon.c

+9 −3

Original line number	Diff line number	Diff line
		@@ -136,7 +136,7 @@ static char fontname[40];
		static int info_idx = -1;

		/* console rotation */
		static int initial_rotation;
		static int initial_rotation = -1;
		static int fbcon_has_sysfs;

		static const struct consw fb_con;
		@@ -955,7 +955,10 @@ static const char *fbcon_startup(void)
		ops->cur_rotate = -1;
		ops->cur_blink_jiffies = HZ / 5;
		info->fbcon_par = ops;
		if (initial_rotation != -1)
		p->con_rotate = initial_rotation;
		else
		p->con_rotate = fbcon_platform_get_rotate(info);
		set_blitting_type(vc, info);

		if (info->fix.type != FB_TYPE_TEXT) {
		@@ -1092,7 +1095,10 @@ static void fbcon_init(struct vc_data *vc, int init)

		ops = info->fbcon_par;
		ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
		if (initial_rotation != -1)
		p->con_rotate = initial_rotation;
		else
		p->con_rotate = fbcon_platform_get_rotate(info);
		set_blitting_type(vc, info);

		cols = vc->vc_cols;

drivers/video/fbdev/core/fbcon.h

+6 −1

Original line number	Diff line number	Diff line
		@@ -261,5 +261,10 @@ extern void fbcon_set_rotate(struct fbcon_ops *ops);
		#define fbcon_set_rotate(x) do {} while(0)
		#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */

		#endif /* _VIDEO_FBCON_H */
		#ifdef CONFIG_DMI
		int fbcon_platform_get_rotate(struct fb_info *info);
		#else
		#define fbcon_platform_get_rotate(i) FB_ROTATE_UR
		#endif /* CONFIG_DMI */

		#endif /* _VIDEO_FBCON_H */

drivers/video/fbdev/core/fbcon_dmi_quirks.c

0 → 100644

+131 −0

Original line number	Diff line number	Diff line
		/*
		* 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", 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", "02/21/2017",
		"03/20/2017", 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 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,
		},
		{}
		};

		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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