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@xxxxxxxxx>
> ---
> 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
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