Commit 5a86bd55 authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Dave Airlie
Browse files

drm: Add drm_format_plane_cpp() utility function 



This function returns the bytes per pixel value based on the pixel
format and plane index.

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 141670e9

drivers/gpu/drm/drm_crtc.c

+45 −0
Original line number Diff line number Diff line
@@ -3498,3 +3498,48 @@ int drm_format_num_planes(uint32_t format) 
	}

}

EXPORT_SYMBOL(drm_format_num_planes);



/**

 * drm_format_plane_cpp - determine the bytes per pixel value

 * @format: pixel format (DRM_FORMAT_*)

 * @plane: plane index

 *

 * RETURNS:

 * The bytes per pixel value for the specified plane.

 */

int drm_format_plane_cpp(uint32_t format, int plane)

{

	unsigned int depth;

	int bpp;



	if (plane >= drm_format_num_planes(format))

		return 0;



	switch (format) {

	case DRM_FORMAT_YUYV:

	case DRM_FORMAT_YVYU:

	case DRM_FORMAT_UYVY:

	case DRM_FORMAT_VYUY:

		return 2;

	case DRM_FORMAT_NV12:

	case DRM_FORMAT_NV21:

	case DRM_FORMAT_NV16:

	case DRM_FORMAT_NV61:

		return plane ? 2 : 1;

	case DRM_FORMAT_YUV410:

	case DRM_FORMAT_YVU410:

	case DRM_FORMAT_YUV411:

	case DRM_FORMAT_YVU411:

	case DRM_FORMAT_YUV420:

	case DRM_FORMAT_YVU420:

	case DRM_FORMAT_YUV422:

	case DRM_FORMAT_YVU422:

	case DRM_FORMAT_YUV444:

	case DRM_FORMAT_YVU444:

		return 1;

	default:

		drm_fb_get_bpp_depth(format, &depth, &bpp);

		return bpp >> 3;

	}

}

EXPORT_SYMBOL(drm_format_plane_cpp);

include/drm/drm_crtc.h

+1 −0
Original line number Diff line number Diff line
@@ -1027,5 +1027,6 @@ extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 
extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,

				 int *bpp);

extern int drm_format_num_planes(uint32_t format);

extern int drm_format_plane_cpp(uint32_t format, int plane);



#endif /* __DRM_CRTC_H__ */