Messages in this thread | | | Subject | Re: [PATCH 01/36] drm/fourcc: Add 2 plane YCbCr 10bit format support | From | "sandy.huang" <> | Date | Mon, 23 Sep 2019 06:05:22 -0700 |
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在 2019/9/23 上午5:53, Ville Syrjälä 写道: > On Mon, Sep 23, 2019 at 08:38:50PM +0800, Sandy Huang wrote: >> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h >> index 3feeaa3..5fe89e9 100644 >> --- a/include/uapi/drm/drm_fourcc.h >> +++ b/include/uapi/drm/drm_fourcc.h >> @@ -266,6 +266,21 @@ extern "C" { >> #define DRM_FORMAT_P016 fourcc_code('P', '0', '1', '6') /* 2x2 subsampled Cr:Cb plane 16 bits per channel */ >> >> /* >> + * 2 plane YCbCr 10bit >> + * index 0 = Y plane, [9:0] Y >> + * index 1 = Cr:Cb plane, [19:0] Cr:Cb little endian >> + * or >> + * index 1 = Cb:Cr plane, [19:0] Cb:Cr little endian > What does "little endian" even mean for these?
It's Inherited from the following define, the difference is 8bit and 10bit.
/* * 2 plane YCbCr * index 0 = Y plane, [7:0] Y * index 1 = Cr:Cb plane, [15:0] Cr:Cb little endian * or * index 1 = Cb:Cr plane, [15:0] Cb:Cr little endian */ #define DRM_FORMAT_NV12 fourcc_code('N', 'V', '1', '2') /* 2x2 subsampled Cr:Cb plane */ #define DRM_FORMAT_NV21 fourcc_code('N', 'V', '2', '1') /* 2x2 subsampled Cb:Cr plane */ #define DRM_FORMAT_NV16 fourcc_code('N', 'V', '1', '6') /* 2x1 subsampled Cr:Cb plane */ #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',
> >> + */ >> + >> +#define DRM_FORMAT_NV12_10 fourcc_code('N', 'A', '1', '2') /* 2x2 subsampled Cr:Cb plane */ >> +#define DRM_FORMAT_NV21_10 fourcc_code('N', 'A', '2', '1') /* 2x2 subsampled Cb:Cr plane */ >> +#define DRM_FORMAT_NV16_10 fourcc_code('N', 'A', '1', '6') /* 2x1 subsampled Cr:Cb plane */ >> +#define DRM_FORMAT_NV61_10 fourcc_code('N', 'A', '6', '1') /* 2x1 subsampled Cb:Cr plane */ >> +#define DRM_FORMAT_NV24_10 fourcc_code('N', 'A', '2', '4') /* non-subsampled Cr:Cb plane */ >> +#define DRM_FORMAT_NV42_10 fourcc_code('N', 'A', '4', '2') /* non-subsampled Cb:Cr plane */ >> + >> +/* >> * 3 plane YCbCr >> * index 0: Y plane, [7:0] Y >> * index 1: Cb plane, [7:0] Cb >> -- >> 2.7.4 >> >> >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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