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: Boris Brezillon boris.brezillon@free-electrons.com Acked-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Acked-by: Philipp Zabel p.zabel@pengutronix.de --- drivers/gpu/drm/drm_crtc.c | 35 +++++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 8 ++++++++ 2 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index e79c8d3..1295863 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -764,6 +764,40 @@ static void drm_mode_remove(struct drm_connector *connector, }
/** + * 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 * @mode: returned mode @@ -914,6 +948,7 @@ 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; diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index c40070a..5d351f5 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -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> @@ -130,6 +131,9 @@ 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;
@@ -982,6 +986,10 @@ extern int drm_mode_connector_set_path_property(struct drm_connector *connector, extern int drm_mode_connector_update_edid_property(struct drm_connector *connector, 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) {