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[media] vivid-tpg: improve Y16 color setup
Currently the colors for the Y16 and Y16_BE pixelformats are in the range 0x0000-0xff00. So pure white (0xffff) is never created. Improve this by making white really white. For other colors the lsb remains 0 so vivid can be used to detect endian problems. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Reviewed-by: Ricardo Ribalda <ricardo.ribalda@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -900,12 +900,19 @@ static void gen_twopix(struct tpg_data *tpg,
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buf[0][offset] = r_y;
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break;
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case V4L2_PIX_FMT_Y16:
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buf[0][offset] = 0;
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/*
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* Ideally both bytes should be set to r_y, but then you won't
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* be able to detect endian problems. So keep it 0 except for
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* the corner case where r_y is 0xff so white really will be
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* white (0xffff).
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*/
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buf[0][offset] = r_y == 0xff ? r_y : 0;
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buf[0][offset+1] = r_y;
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break;
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case V4L2_PIX_FMT_Y16_BE:
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/* See comment for V4L2_PIX_FMT_Y16 above */
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buf[0][offset] = r_y;
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buf[0][offset+1] = 0;
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buf[0][offset+1] = r_y == 0xff ? r_y : 0;
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break;
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case V4L2_PIX_FMT_YUV422P:
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case V4L2_PIX_FMT_YUV420:
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