Re: [PATCH 2/5] drm/stm: ltdc: add YCbCr 422 output support

On 12/15/21 10:47 PM, Yannick Fertre wrote:

LTDC 40100 hw version supports the YCbCr 422 output, reducing the output pins from 24 to 16. This feature is useful for some external devices like HDMI bridges.

Both ITU-R BT.601 & ITU-R BT.709 are supported.

It is also possible to choose the chrominance order between

• Cb is output first (Y0Cb, then Y1Cr, Y2Cb and so on).
• Cr is output first (Y0Cr, then Y1Cb, Y2Cr and so on).

Signed-off-by: Yannick Fertre yannick.fertre@foss.st.com

drivers/gpu/drm/stm/ltdc.c | 44 +++++++++++++++++++++++++++++++++++++- drivers/gpu/drm/stm/ltdc.h | 1 + 2 files changed, 44 insertions(+), 1 deletion(-)

Hello Yannick,

Reviewed-by: Raphael Gallais-Pou raphael.gallais-pou@foss.st.com

Thanks,

Raphaël