Commit b5571e9d authored by Boris Brezillon's avatar Boris Brezillon
Browse files

drm: add bus_formats and num_bus_formats fields to drm_display_info 



Add bus_formats and num_bus_formats fields and
drm_display_info_set_bus_formats helper function to specify the bus
formats supported by a given display.

This information can be used by display controller drivers to configure
the output interface appropriately (i.e. RGB565, RGB666 or RGB888 on raw
RGB or LVDS busses).

Signed-off-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
parent fc839753

drivers/gpu/drm/drm_crtc.c

+35 −0
Original line number Diff line number Diff line
@@ -761,6 +761,40 @@ static void drm_mode_remove(struct drm_connector *connector, 
	drm_mode_destroy(connector->dev, mode);

}



/**

 * drm_display_info_set_bus_formats - set the supported bus formats

 * @info: display info to store bus formats in

 * @fmts: array containing the supported bus formats

 * @nfmts: the number of entries in the fmts array

 *

 * Store the supported bus formats in display info structure.

 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for

 * a full list of available formats.

 */

int drm_display_info_set_bus_formats(struct drm_display_info *info,

				     const u32 *formats,

				     unsigned int num_formats)

{

	u32 *fmts = NULL;



	if (!formats && num_formats)

		return -EINVAL;



	if (formats && num_formats) {

		fmts = kmemdup(formats, sizeof(*formats) * num_formats,

			       GFP_KERNEL);

		if (!formats)

			return -ENOMEM;

	}



	kfree(info->bus_formats);

	info->bus_formats = fmts;

	info->num_bus_formats = num_formats;



	return 0;

}

EXPORT_SYMBOL(drm_display_info_set_bus_formats);



/**

 * drm_connector_get_cmdline_mode - reads the user's cmdline mode

 * @connector: connector to quwery
@@ -923,6 +957,7 @@ void drm_connector_cleanup(struct drm_connector *connector) 
	ida_remove(&drm_connector_enum_list[connector->connector_type].ida,

		   connector->connector_type_id);



	kfree(connector->display_info.bus_formats);

	drm_mode_object_put(dev, &connector->base);

	kfree(connector->name);

	connector->name = NULL;

include/drm/drm_crtc.h

+8 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/idr.h>

#include <linux/fb.h>

#include <linux/hdmi.h>

#include <linux/media-bus-format.h>

#include <uapi/drm/drm_mode.h>

#include <uapi/drm/drm_fourcc.h>

#include <drm/drm_modeset_lock.h>
@@ -139,6 +140,9 @@ struct drm_display_info { 
	enum subpixel_order subpixel_order;

	u32 color_formats;



	const u32 *bus_formats;

	unsigned int num_bus_formats;



	/* Mask of supported hdmi deep color modes */

	u8 edid_hdmi_dc_modes;
@@ -1282,6 +1286,10 @@ int drm_mode_connector_set_tile_property(struct drm_connector *connector); 
extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,

						   const struct edid *edid);



extern int drm_display_info_set_bus_formats(struct drm_display_info *info,

					    const u32 *formats,

					    unsigned int num_formats);



static inline bool drm_property_type_is(struct drm_property *property,

		uint32_t type)

{

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