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    Subject[PATCH RFC v2 8/8] drm/meson: Output in YUV444 if sink supports it
    Date
    With the YUV420 handling, we can dynamically setup the HDMI output
    pixel format depending on the mode and connector info.
    So now, we can output in YUV444, which is the native video pipeline
    format, directly to the HDMI Sink if it's supported without
    necessarily involving the HDMI Controller CSC.

    Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
    ---
    drivers/gpu/drm/meson/meson_dw_hdmi.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
    index 83360f37d9ce..1b7092ab1be8 100644
    --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
    +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
    @@ -670,7 +670,10 @@ static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
    dw_hdmi->output_bus_format = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
    } else {
    dw_hdmi->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
    - dw_hdmi->output_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
    + if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444)
    + dw_hdmi->output_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
    + else
    + dw_hdmi->output_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
    }

    return 0;
    --
    2.19.2
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