+/**
+ * drm_driver_legacy_fb_format - compute drm fourcc code from legacy description
+ * @bpp: bits per pixels
+ * @depth: bit depth per pixel
+ * @native: use host native byte order
+ *
+ * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
+ * Unlike drm_mode_legacy_fb_format() this looks at the drivers mode_config,
+ * and depending on the quirk_addfb_prefer_host_byte_order flag it returns
+ * little endian byte order or host byte order framebuffer formats.
+ */
+uint32_t drm_driver_legacy_fb_format(struct drm_device *dev,
+ uint32_t bpp, uint32_t depth)
+{
+ uint32_t fmt = drm_mode_legacy_fb_format(bpp, depth);
+
+ if (dev->mode_config.quirk_addfb_prefer_host_byte_order) {
+ if (fmt == DRM_FORMAT_XRGB8888)
+ fmt = DRM_FORMAT_HOST_XRGB8888;
+ if (fmt == DRM_FORMAT_ARGB8888)
+ fmt = DRM_FORMAT_HOST_ARGB8888;
+ if (fmt == DRM_FORMAT_RGB565)
+ fmt = DRM_FORMAT_HOST_RGB565;
+ if (fmt == DRM_FORMAT_XRGB1555)
+ fmt = DRM_FORMAT_HOST_XRGB1555;
+ }
+ return fmt;
+}
+EXPORT_SYMBOL(drm_driver_legacy_fb_format);
+