[Intel-gfx] [PATCH] drm/i915/icl: Fix setting 10 bit deep color mode

[Ville Syrjälä]

On Mon, Apr 29, 2019 at 05:00:28PM -0700, Aditya Swarup wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> There is a bug in hdmi_deep_color_possible() - we compare pipe_bpp
> <= 8*3 which returns true every time for hdmi_deep_color_possible 12 bit
> deep color mode test in intel_hdmi_compute_config().(Even when the
> requested color mode is 10 bit through max bpc property)
> 
> Comparing pipe_bpp with bpc * 3 takes care of this condition where
> requested max bpc is 10 bit, so hdmi_deep_color_possible with 12 bit
> returns false when requested max bpc is 10.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

How did my sob appear on this? Pretty sure I didn't actually put it
here.

> Signed-off-by: Aditya Swarup <aditya.swarup at intel.com>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Cc: Clinton Taylor <Clinton.A.Taylor at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 991eb362ef4f..74f2dcb8b1ad 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -2159,7 +2159,7 @@ static bool hdmi_deep_color_possible(const struct intel_crtc_state *crtc_state,
>  	if (bpc == 10 && INTEL_GEN(dev_priv) < 11)
>  		return false;
>  
> -	if (crtc_state->pipe_bpp <= 8*3)
> +	if (crtc_state->pipe_bpp < bpc * 3)
>  		return false;
>  
>  	if (!crtc_state->has_hdmi_sink)
> -- 
> 2.17.1

-- 
Ville Syrjälä
Intel