Re: [PATCH 1/2] drm_fourcc: Add new P010 video format

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On 01/04/2017 11:56 PM, Ville Syrjälä wrote:
On Mon, Jan 02, 2017 at 04:50:03PM +0800, Randy Li wrote:
P010 is a planar 4:2:0 YUV with interleaved UV plane, 10 bits
per channel video format. Rockchip's vop support this
video format(little endian only) as the input video format.

Signed-off-by: Randy Li <ayaka@xxxxxxxxxxx>
---
  include/uapi/drm/drm_fourcc.h | 1 +
  1 file changed, 1 insertion(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 9e1bb7f..d2721da 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -119,6 +119,7 @@ extern "C" {
  #define DRM_FORMAT_NV61		fourcc_code('N', 'V', '6', '1') /* 2x1 subsampled Cb:Cr plane */
  #define DRM_FORMAT_NV24		fourcc_code('N', 'V', '2', '4') /* non-subsampled Cr:Cb plane */
  #define DRM_FORMAT_NV42		fourcc_code('N', 'V', '4', '2') /* non-subsampled Cb:Cr plane */
+#define DRM_FORMAT_P010		fourcc_code('P', '0', '1', '0') /* 2x2 subsampled Cr:Cb plane 10 bits per channel */
We could use a better description of the format here. IIRC there is
10bits of actual data contained in each 16bits. So there should be a
proper comment explaning in which way the bits are stored.
It is a little hard to describe P010, which leaves a problem cpp information in the new patches. Also I have no idea how to draw the byte-order table the rst document for v4l2.

/*
   * 3 plane YCbCr
--
2.7.4

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