[PATCH 01/37] drm/vc4: Limit max_bpc to 8 on Pi0-3

[Dave Stevenson]

Pi 0-3 have no deep colour support and only 24bpp output,
so max_bpc should remain as 8, and no HDR metadata property
should be registered.

Fixes: ba8c0faebbb0 ("drm/vc4: hdmi: Enable 10/12 bpc output")
Signed-off-by: Dave Stevenson <dave.steven...@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 62b82b1eeb36..6ebcc38be291 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -640,6 +640,11 @@ static int vc4_hdmi_connector_init(struct drm_device *dev,
        if (ret)
                return ret;
 
+       if (vc4_hdmi->variant->supports_hdr)
+               drm_connector_attach_max_bpc_property(connector, 8, 12);
+       else
+               drm_connector_attach_max_bpc_property(connector, 8, 8);
+
        drm_connector_attach_encoder(connector, encoder);
 
        return 0;

-- 
2.34.1