Commit b5571e9d authored by Boris Brezillon's avatar Boris Brezillon

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 <>
Acked-by: Laurent Pinchart's avatarLaurent Pinchart <>
Acked-by: Philipp Zabel's avatarPhilipp Zabel <>
Acked-by: default avatarThierry Reding <>
parent fc839753
......@@ -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,
if (!formats)
return -ENOMEM;
info->bus_formats = fmts;
info->num_bus_formats = num_formats;
return 0;
* 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)
drm_mode_object_put(dev, &connector->base);
connector->name = NULL;
......@@ -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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