Re: [Intel-gfx] [v4] drm/i915/display: Extend DP HDR support to hsw+

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Mar 24, 2022 at 05:34:38PM +0530, Uma Shankar wrote:
> HSW+ platforms are able to send out HDR Metadata SDP DIP
> packet as GMP. Hence, extending the support for HDR on DP
> encoders for the same.
> 
> v2: Limited to non eDP ports on hsw/bdw and removed it for
> lspcon as it is done separately (suggested by Ville)
> 
> v3: Added helper and limited eDP restriction to port A (Ville)
> 
> v4: Dropped some redundant checks (Ville)
> 
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/5389
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 21 ++++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 9e19165fd175..fdcb169adb54 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4913,6 +4913,25 @@ bool intel_dp_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
>  	return intel_bios_is_port_edp(dev_priv, port);
>  }
>  
> +static bool
> +has_gamut_metadata_dip(struct drm_i915_private *i915, enum port port)
> +{
> +	if (intel_bios_is_lspcon_present(i915, port))
> +		return false;
> +
> +	if (DISPLAY_VER(i915) >= 11)
> +		return true;
> +
> +	if (port == PORT_A)
> +		return false;
> +
> +	if (IS_HASWELL(i915) || IS_BROADWELL(i915) ||
> +	    DISPLAY_VER(i915) >= 9)
> +		return true;
> +
> +	return false;
> +}
> +
>  static void
>  intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
>  {
> @@ -4939,7 +4958,7 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
>  		intel_attach_dp_colorspace_property(connector);
>  	}
>  
> -	if (IS_GEMINILAKE(dev_priv) || DISPLAY_VER(dev_priv) >= 11)
> +	if (has_gamut_metadata_dip(dev_priv, port))
>  		drm_object_attach_property(&connector->base,
>  					   connector->dev->mode_config.hdr_output_metadata_property,
>  					   0);
> -- 
> 2.25.1

-- 
Ville Syrjälä
Intel