[PATCH v4 2/7] drm: Add panel orientation quirks

Hans de Goede
2017-10-23T09:24:57Z

Some x86 clamshell design devices use portrait tablet screens and a display
engine which cannot rotate in hardware, so the firmware just leaves things
as is and we cannot figure out that the display is oriented non upright
from the hardware.

So at least on x86, we need a quirk table for this. This commit adds a DMI
based quirk table which is initially populated with 5 such devices: Asus
T100HA, GPD Pocket, GPD win, I.T.Works TW891 and the VIOS LTH17.

This quirk table will be used by the drm code to let userspace know that
the display is not mounted upright inside the devices case through a new
panel orientation drm-connector property, as well as to tell fbcon to
rotate the console so that it shows the right way up.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/gpu/drm/Kconfig | 3 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/drm_panel_orientation_quirks.c | 157 +++++++++++++++++++++++++
include/drm/drm_utils.h | 18 +++
4 files changed, 179 insertions(+)
create mode 100644 drivers/gpu/drm/drm_panel_orientation_quirks.c
create mode 100644 include/drm/drm_utils.h

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 4d9f21831741..9d005ac98c2b 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -26,6 +26,9 @@ config DRM_MIPI_DSI
bool
depends on DRM

+config DRM_PANEL_ORIENTATION_QUIRKS
+ tristate
+
config DRM_DP_AUX_CHARDEV
bool "DRM DP AUX Interface"
depends on DRM
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index a3fdc5a68dff..ffb621819bbf 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_DRM_DEBUG_MM_SELFTEST) += selftests/

obj-$(CONFIG_DRM) += drm.o
obj-$(CONFIG_DRM_MIPI_DSI) += drm_mipi_dsi.o
+obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o
obj-$(CONFIG_DRM_ARM) += arm/
obj-$(CONFIG_DRM_TTM) += ttm/
obj-$(CONFIG_DRM_TDFX) += tdfx/
diff --git a/drivers/gpu/drm/drm_panel_orientation_quirks.c b/drivers/gpu/drm/drm_panel_orientation_quirks.c
new file mode 100644
index 000000000000..cea4d71f4978
--- /dev/null
+++ b/drivers/gpu/drm/drm_panel_orientation_quirks.c
@@ -0,0 +1,157 @@
+/*
+ * drm_panel_orientation_quirks.c -- Quirks for non-normal panel orientation
+ *
+ * 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 <drm/drm_connector.h>
+
+#ifdef CONFIG_DMI
+
+/*
+ * 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 drm_dmi_panel_orientation_data {
+ int width;
+ int height;
+ const char * const *bios_dates;
+ int orientation;
+};
+
+static const struct drm_dmi_panel_orientation_data asus_t100ha = {
+ .width = 800,
+ .height = 1280,
+ .orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP,
+};
+
+static const struct drm_dmi_panel_orientation_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 },
+ .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
+};
+
+static const struct drm_dmi_panel_orientation_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 },
+ .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
+};
+
+static const struct drm_dmi_panel_orientation_data itworks_tw891 = {
+ .width = 800,
+ .height = 1280,
+ .bios_dates = (const char * const []){ "10/16/2015", NULL },
+ .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
+};
+
+static const struct drm_dmi_panel_orientation_data vios_lth17 = {
+ .width = 800,
+ .height = 1280,
+ .orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP,
+};
+
+static const struct dmi_system_id orientation_data[] = {
+ { /* Asus T100HA */
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100HAN"),
+ },
+ .driver_data = (void *)&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 *)&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 *)&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 *)&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 *)&vios_lth17,
+ },
+ {}
+};
+
+int drm_get_panel_orientation_quirk(int width, int height)
+{
+ const struct dmi_system_id *match;
+ const struct drm_dmi_panel_orientation_data *data;
+ const char *bios_date;
+ int i;
+
+ for (match = dmi_first_match(orientation_data);
+ match;
+ match = dmi_first_match(match + 1)) {
+ data = match->driver_data;
+
+ if (data->width != width ||
+ data->height != height)
+ continue;
+
+ if (!data->bios_dates)
+ return data->orientation;
+
+ 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->orientation;
+ }
+ }
+
+ return DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
+}
+EXPORT_SYMBOL(drm_get_panel_orientation_quirk);
+
+#else
+
+/* There are no quirks for non x86 devices yet */
+int drm_get_panel_orientation_quirk(int width, int height)
+{
+ return DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
+}
+EXPORT_SYMBOL(drm_get_panel_orientation_quirk);
+
+#endif
diff --git a/include/drm/drm_utils.h b/include/drm/drm_utils.h
new file mode 100644
index 000000000000..cea362aeaffe
--- /dev/null
+++ b/include/drm/drm_utils.h
@@ -0,0 +1,18 @@
+/*
+ * Function prototypes for misc. drm utility functions.
+ * Specifically this file is for function prototypes for functions which
+ * may also be used outside of drm code (e.g. in fbdev drivers).
+ *
+ * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRM_UTILS_H__
+#define __DRM_UTILS_H__
+
+int drm_get_panel_orientation_quirk(int width, int height);
+
+#endif
--
2.14.2