[Intel-gfx] [PATCH 1/5] drm/i915: Add broadcast RGB property for DP MST

[Ville Syrjälä]

On Fri, Mar 08, 2019 at 09:24:05PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Add the "Broadcast RGB" property to MST connectors, and implement
> the same logic for it as we have in the SST code.
> 
> Cc: Ivan Vlk <ari at adyline.sk>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108821

Tested-by: Ivan Vlk <ari at adyline.sk>

review needed...

> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp_mst.c | 29 +++++++++++++++++++++++++++--
>  1 file changed, 27 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
> index fb67cd931117..2b791d67a43f 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -38,6 +38,8 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
>  	struct intel_digital_port *intel_dig_port = intel_mst->primary;
>  	struct intel_dp *intel_dp = &intel_dig_port->dp;
>  	struct drm_connector *connector = conn_state->connector;
> +	struct intel_digital_connector_state *intel_conn_state =
> +		to_intel_digital_connector_state(conn_state);
>  	void *port = to_intel_connector(connector)->port;
>  	struct drm_atomic_state *state = pipe_config->base.state;
>  	struct drm_crtc *crtc = pipe_config->base.crtc;
> @@ -77,6 +79,21 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
>  	if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
>  		pipe_config->has_audio = true;
>  
> +	if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) {
> +		/*
> +		 * See:
> +		 * CEA-861-E - 5.1 Default Encoding Parameters
> +		 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
> +		 */
> +		pipe_config->limited_color_range =
> +			pipe_config->pipe_bpp != 18 &&
> +			drm_default_rgb_quant_range(adjusted_mode) ==
> +			HDMI_QUANTIZATION_RANGE_LIMITED;
> +	} else {
> +		pipe_config->limited_color_range =
> +			intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_LIMITED;
> +	}
> +
>  	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
>  	pipe_config->pbn = mst_pbn;
>  
> @@ -117,7 +134,11 @@ intel_dp_mst_atomic_check(struct drm_connector *connector,
>  	struct drm_crtc *new_crtc = new_conn_state->crtc;
>  	struct drm_crtc_state *crtc_state;
>  	struct drm_dp_mst_topology_mgr *mgr;
> -	int ret = 0;
> +	int ret;
> +
> +	ret = intel_digital_connector_atomic_check(connector, new_conn_state);
> +	if (ret)
> +		return ret;
>  
>  	if (!old_conn_state->crtc)
>  		return 0;
> @@ -354,11 +375,13 @@ intel_dp_mst_detect(struct drm_connector *connector, bool force)
>  static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
>  	.detect = intel_dp_mst_detect,
>  	.fill_modes = drm_helper_probe_single_connector_modes,
> +	.atomic_get_property = intel_digital_connector_atomic_get_property,
> +	.atomic_set_property = intel_digital_connector_atomic_set_property,
>  	.late_register = intel_connector_register,
>  	.early_unregister = intel_connector_unregister,
>  	.destroy = intel_connector_destroy,
>  	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> -	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> +	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
>  };
>  
>  static int intel_dp_mst_get_modes(struct drm_connector *connector)
> @@ -487,6 +510,8 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
>  	if (ret)
>  		goto err;
>  
> +	intel_attach_broadcast_rgb_property(connector);
> +
>  	return connector;
>  
>  err:
> -- 
> 2.19.2

-- 
Ville Syrjälä
Intel