[PATCH v6 09/10] drm/i915: Update bits per component for display info

[Daniel Vetter]

On Wed, Jul 06, 2016 at 02:04:53PM +0300, Mika Kahola wrote:
> DisplayPort branch device may define max supported bits per
> component. Update display info based on this value if bpc
> is defined.
> 
> v2: cleanup to match the drm_dp_helper.c patches introduced
>     earlier in this series
> 
> Signed-off-by: Mika Kahola <mika.kahola at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 76a654e..53ec844 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -3932,6 +3932,14 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
>  	uint8_t *dpcd = intel_dp->dpcd;
>  	uint8_t type;
>  
> +	if (dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT) {
> +		int bpc = drm_dp_downstream_max_bpc(dpcd,
> +						    intel_dp->downstream_ports);
> +
> +		if (bpc > 0)
> +			intel_dp->attached_connector->base.display_info.bpc = bpc;
> +	}

I think a function in the dp helpers to correctly fill out the connector's
display info would be neater.
-Daniel

> +
>  	if (!intel_dp_get_dpcd(intel_dp))
>  		return connector_status_disconnected;
>  
> @@ -3968,6 +3976,7 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
>  			return connector_status_unknown;
>  	}
>  
> +
>  	/* Anything else is out of spec, warn and ignore */
>  	DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
>  	return connector_status_disconnected;
> -- 
> 1.9.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch