[Intel-gfx] [PATCH v3 3/7] drm: Add support for a panel-orientation connector property
Daniel Vetter
daniel at ffwll.ch
Tue Oct 31 10:07:16 UTC 2017
On Mon, Oct 30, 2017 at 11:57:10AM +0100, Hans de Goede wrote:
> Hi,
>
> On 30-10-17 10:43, Daniel Vetter wrote:
> > On Mon, Oct 23, 2017 at 09:14:21AM +0200, Hans de Goede wrote:
> > > On some devices the LCD panel is mounted in the casing in such a way that
> > > the up/top side of the panel does not match with the top side of the
> > > device (e.g. it is mounted upside-down).
> > >
> > > This commit adds the necessary infra for lcd-panel drm_connector-s to
> > > have a "panel orientation" property to communicate how the panel is
> > > orientated vs the casing.
> > >
> > > Userspace can use this property to check for non-normal orientation and
> > > then adjust the displayed image accordingly by rotating it to compensate.
> > >
> > > Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> > > ---
> > > Changes in v2:
> > > -Rebased on 4.14-rc1
> > > -Store panel_orientation in drm_display_info, so that drm_fb_helper.c can
> > > access it easily
> > > -Have a single drm_connector_init_panel_orientation_property rather then
> > > create and attach functions. The caller is expected to set
> > > drm_display_info.panel_orientation before calling this, then this will
> > > check for platform specific quirks overriding the panel_orientation and if
> > > the panel_orientation is set after this then it will attach the property.
> > > ---
> > > drivers/gpu/drm/Kconfig | 1 +
> > > drivers/gpu/drm/drm_connector.c | 73 +++++++++++++++++++++++++++++++++++++++++
> > > include/drm/drm_connector.h | 11 +++++++
> > > include/drm/drm_mode_config.h | 7 ++++
> > > include/uapi/drm/drm_mode.h | 7 ++++
> > > 5 files changed, 99 insertions(+)
> > >
> > > diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> > > index 9d005ac98c2b..0b166e626eb6 100644
> > > --- a/drivers/gpu/drm/Kconfig
> > > +++ b/drivers/gpu/drm/Kconfig
> > > @@ -7,6 +7,7 @@
> > > menuconfig DRM
> > > tristate "Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)"
> > > depends on (AGP || AGP=n) && !EMULATED_CMPXCHG && HAS_DMA
> > > + select DRM_PANEL_ORIENTATION_QUIRKS
> > > select HDMI
> > > select FB_CMDLINE
> > > select I2C
> > > diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> > > index 704fc8934616..129c83a84320 100644
> > > --- a/drivers/gpu/drm/drm_connector.c
> > > +++ b/drivers/gpu/drm/drm_connector.c
> > > @@ -24,6 +24,7 @@
> > > #include <drm/drm_connector.h>
> > > #include <drm/drm_edid.h>
> > > #include <drm/drm_encoder.h>
> > > +#include <drm/drm_utils.h>
> > > #include "drm_crtc_internal.h"
> > > #include "drm_internal.h"
> > > @@ -212,6 +213,8 @@ int drm_connector_init(struct drm_device *dev,
> > > mutex_init(&connector->mutex);
> > > connector->edid_blob_ptr = NULL;
> > > connector->status = connector_status_unknown;
> > > + connector->display_info.panel_orientation =
> > > + DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
> > > drm_connector_get_cmdline_mode(connector);
> > > @@ -664,6 +667,13 @@ static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
> > > { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
> > > };
> > > +static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
> > > + { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
> > > + { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
> > > + { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
> > > + { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
> > > +};
> > > +
> > > static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
> > > { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
> > > { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
> > > @@ -768,6 +778,18 @@ DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
> > > *
> > > * CRTC_ID:
> > > * Mode object ID of the &drm_crtc this connector should be connected to.
> > > + *
> > > + * Connectors for LCD panels may also have one standardized property:
> > > + *
> > > + * panel orientation:
> > > + * On some devices the LCD panel is mounted in the casing in such a way
> > > + * that the up/top side of the panel does not match with the top side of
> > > + * the device. Userspace can use this property to check for this.
> > > + * Note that input coordinates from touchscreens (input devices with
> > > + * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
> > > + * coordinates, so if userspace rotates the picture to adjust for
> > > + * the orientation it must also apply the same transformation to the
> > > + * touchscreen input coordinates.
> > > */
> > > int drm_connector_create_standard_properties(struct drm_device *dev)
> > > @@ -1234,6 +1256,57 @@ void drm_mode_connector_set_link_status_property(struct drm_connector *connector
> > > }
> > > EXPORT_SYMBOL(drm_mode_connector_set_link_status_property);
> > > +/**
> > > + * drm_connector_init_panel_orientation_property -
> > > + * initialize the connecters panel_orientation property
> > > + * @connector: connector for which to init the panel-orientation property.
> > > + * @width: width in pixels of the panel, used for panel quirk detection
> > > + * @height: height in pixels of the panel, used for panel quirk detection
> > > + *
> > > + * This function should only be called for built-in panels, after setting
> > > + * connector->display_info.panel_orientation first (if known).
> > > + *
> > > + * This function will check for platform specific (e.g. DMI based) quirks
> > > + * overriding display_info.panel_orientation first, then if panel_orientation
> > > + * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
> > > + * "panel orientation" property to the connector.
> > > + *
> > > + * Returns:
> > > + * Zero on success, negative errno on failure.
> > > + */
> >
> > Hm, I think our more usual way is to set the prop up first, and then the
> > parsing mode updates the property (in case it's not quite as stable as we
> > thought). Not the property init function calling the parsing code.
> >
> > I know that the panel rotation will probably not change, but I think it'd
> > be good to be consistent here. Or at least look into whether that makes
> > sense ...
>
> I'm not calling any parsing code here, what I'm calling is the code
> checking for quirks, so that that is done in one central place just like
> how drm_add_edid_modes() calls edid_get_quirks().
>
> I could create the property in drm_connector_create_standard_properties()
> instead of in drm_connector_init_panel_orientation_property and
> rename the latter to drm_connector_attach_panel_orientation_property
> if you prefer having things split that way.
>
> Auto attaching the property is tricky since we only want it on panels.
I just looked a bit backwards, and I hoped we could auto-update the
property when parsing the edid (like we do in a bunch of other places).
But sounds like that's not possible, so please disregard my suggestions.
If it later on turns out we need 2 steps, or have this also updated in the
edid parsing code, we can fix that when there's a real need.
-Daniel
>
> Regards,
>
> Hans
>
>
>
> >
> > Besides this bikeshed color question makes all sense.
> > -Daniel
> >
> > > +int drm_connector_init_panel_orientation_property(
> > > + struct drm_connector *connector, int width, int height)
> > > +{
> > > + struct drm_device *dev = connector->dev;
> > > + struct drm_display_info *info = &connector->display_info;
> > > + struct drm_property *prop;
> > > + int orientation_quirk;
> > > +
> > > + orientation_quirk = drm_get_panel_orientation_quirk(width, height);
> > > + if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
> > > + info->panel_orientation = orientation_quirk;
> > > +
> > > + if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
> > > + return 0;
> > > +
> > > + prop = dev->mode_config.panel_orientation_property;
> > > + if (!prop) {
> > > + prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
> > > + "panel orientation",
> > > + drm_panel_orientation_enum_list,
> > > + ARRAY_SIZE(drm_panel_orientation_enum_list));
> > > + if (!prop)
> > > + return -ENOMEM;
> > > +
> > > + dev->mode_config.panel_orientation_property = prop;
> > > + }
> > > +
> > > + drm_object_attach_property(&connector->base, prop,
> > > + info->panel_orientation);
> > > + return 0;
> > > +}
> > > +EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
> > > +
> > > int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
> > > struct drm_property *property,
> > > uint64_t value)
> > > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> > > index b4285c40e1e4..e6883065a461 100644
> > > --- a/include/drm/drm_connector.h
> > > +++ b/include/drm/drm_connector.h
> > > @@ -222,6 +222,15 @@ struct drm_display_info {
> > > #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
> > > #define DRM_COLOR_FORMAT_YCRCB420 (1<<3)
> > > + /**
> > > + * @panel_orientation: Read only connector property for built-in panels,
> > > + * indicating the orientation of the panel vs the device's casing.
> > > + * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
> > > + * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the
> > > + * fb to compensate and gets exported as prop to userspace.
> > > + */
> > > + int panel_orientation;
> > > +
> > > /**
> > > * @color_formats: HDMI Color formats, selects between RGB and YCrCb
> > > * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
> > > @@ -1019,6 +1028,8 @@ int drm_mode_connector_update_edid_property(struct drm_connector *connector,
> > > const struct edid *edid);
> > > void drm_mode_connector_set_link_status_property(struct drm_connector *connector,
> > > uint64_t link_status);
> > > +int drm_connector_init_panel_orientation_property(
> > > + struct drm_connector *connector, int width, int height);
> > > /**
> > > * struct drm_tile_group - Tile group metadata
> > > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> > > index 0b4ac2ebc610..7d4ee1726e0a 100644
> > > --- a/include/drm/drm_mode_config.h
> > > +++ b/include/drm/drm_mode_config.h
> > > @@ -728,6 +728,13 @@ struct drm_mode_config {
> > > */
> > > struct drm_property *suggested_y_property;
> > > + /**
> > > + * @panel_orientation_property: Optional connector property indicating
> > > + * how the lcd-panel is mounted inside the casing (e.g. normal or
> > > + * upside-down).
> > > + */
> > > + struct drm_property *panel_orientation_property;
> > > +
> > > /* dumb ioctl parameters */
> > > uint32_t preferred_depth, prefer_shadow;
> > > diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> > > index 34b6bb34b002..f60fae67bc1f 100644
> > > --- a/include/uapi/drm/drm_mode.h
> > > +++ b/include/uapi/drm/drm_mode.h
> > > @@ -127,6 +127,13 @@ extern "C" {
> > > #define DRM_MODE_LINK_STATUS_GOOD 0
> > > #define DRM_MODE_LINK_STATUS_BAD 1
> > > +/* Panel Orientation options */
> > > +#define DRM_MODE_PANEL_ORIENTATION_UNKNOWN -1
> > > +#define DRM_MODE_PANEL_ORIENTATION_NORMAL 0
> > > +#define DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP 1
> > > +#define DRM_MODE_PANEL_ORIENTATION_LEFT_UP 2
> > > +#define DRM_MODE_PANEL_ORIENTATION_RIGHT_UP 3
> > > +
> > > /*
> > > * DRM_MODE_ROTATE_<degrees>
> > > *
> > > --
> > > 2.14.2
> > >
> > > _______________________________________________
> > > Intel-gfx mailing list
> > > Intel-gfx at lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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