On Sat, Nov 04, 2017 at 03:08:23PM +0100, Hans de Goede wrote:
> 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@xxxxxxxxxx>
> ---
> Changes in v5:
> -Add a kernel-doc comment documenting drm_get_panel_orientation_quirk()
The kerneldoc isn't much use without pulling it into the overall
structure. Documentation/gpu/drm-kms-helper.rst seems like a suitable
place. Pls also check it builds correctly and looks pretty using
$ make htmldocs
With that fixed:
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> -Remove board_* matches from the dmi-matches for the VIOS LTH17 laptop,
> keeping only the (identical) sys_vendor and product_name matches.
> This is necessary because an older version of the bios has
> board_vendor set to VOIS instead of VIOS
> ---
> drivers/gpu/drm/Kconfig | 3 +
> drivers/gpu/drm/Makefile | 1 +
> drivers/gpu/drm/drm_panel_orientation_quirks.c | 174 +++++++++++++++++++++++++
> include/drm/drm_utils.h | 18 +++
> 4 files changed, 196 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..b8765e2ed1d6
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_panel_orientation_quirks.c
> @@ -0,0 +1,174 @@
> +/*
> + * drm_panel_orientation_quirks.c -- Quirks for non-normal panel orientation
> + *
> + * Copyright (C) 2017 Hans de Goede <hdegoede@xxxxxxxxxx>
> + *
> + * 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"),
> + },
> + .driver_data = (void *)&vios_lth17,
> + },
> + {}
> +};
> +
> +/**
> + * drm_get_panel_orientation_quirk - Check for panel orientation quirks
> + * @width: width in pixels of the panel
> + * @height: height in pixels of the panel
> + *
> + * This function checks for platform specific (e.g. DMI based) quirks
> + * providing info on panel_orientation for systems where this cannot be
> + * probed from the hard-/firm-ware. To avoid false-positive this function
> + * takes the panel resolution as argument and checks that against the
> + * resolution expected by the quirk-table entry.
> + *
> + * Note this function is also used outside of the drm-subsys, by for example
> + * the efifb code. Because of this this function gets compiled into its own
> + * kernel-module when built as a module.
> + *
> + * Returns:
> + * A DRM_MODE_PANEL_ORIENTATION_* value if there is a quirk for this system,
> + * or DRM_MODE_PANEL_ORIENTATION_UNKNOWN if there is no quirk.
> + */
> +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@xxxxxxxxxx>
> + *
> + * 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
> --
> 2.14.3
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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