diff options
Diffstat (limited to 'drivers/gpu/drm/rcar-du')
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_plane.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index a65f81ddf51d..38ebd20e4e8d 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c @@ -103,9 +103,12 @@ void rcar_du_plane_update_base(struct rcar_du_plane *plane) struct rcar_du_device *rcdu = plane->dev; unsigned int index = plane->hwindex; - /* According to the datasheet the Y position is expressed in raster line - * units. However, 32bpp formats seem to require a doubled Y position - * value. Similarly, for the second plane, NV12 and NV21 formats seem to + /* The Y position is expressed in raster line units and must be doubled + * for 32bpp formats, according to the R8A7790 datasheet. No mention of + * doubling the Y position is found in the R8A7779 datasheet, but the + * rule seems to apply there as well. + * + * Similarly, for the second plane, NV12 and NV21 formats seem to * require a halved Y position value. */ rcar_du_plane_write(rcdu, index, PnSPXR, plane->src_x); |