linux-kernel - Re: [PATCH 01/26] drm/dp_mst: Move link address dumping into a function

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Date:   Thu, 8 Aug 2019 21:53:18 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Lyude Paul <lyude@...hat.com>
Cc:     dri-devel@...ts.freedesktop.org, Juston Li <juston.li@...el.com>,
        Imre Deak <imre.deak@...el.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>, Harry Wentland <hwentlan@....com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/26] drm/dp_mst: Move link address dumping into a
 function

On Wed, Jul 17, 2019 at 09:42:24PM -0400, Lyude Paul wrote:
> Since we're about to be calling this from multiple places. Also it makes
> things easier to read!
> 
> Cc: Juston Li <juston.li@...el.com>
> Cc: Imre Deak <imre.deak@...el.com>
> Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> Cc: Harry Wentland <hwentlan@....com>
> Signed-off-by: Lyude Paul <lyude@...hat.com>

Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>

> ---
>  drivers/gpu/drm/drm_dp_mst_topology.c | 35 ++++++++++++++++++---------
>  1 file changed, 23 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 0984b9a34d55..998081b9b205 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -2013,6 +2013,28 @@ static void drm_dp_queue_down_tx(struct drm_dp_mst_topology_mgr *mgr,
>  	mutex_unlock(&mgr->qlock);
>  }
>  
> +static void
> +drm_dp_dump_link_address(struct drm_dp_link_address_ack_reply *reply)
> +{
> +	struct drm_dp_link_addr_reply_port *port_reply;
> +	int i;
> +
> +	for (i = 0; i < reply->nports; i++) {
> +		port_reply = &reply->ports[i];
> +		DRM_DEBUG_KMS("port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n",
> +			      i,
> +			      port_reply->input_port,
> +			      port_reply->peer_device_type,
> +			      port_reply->port_number,
> +			      port_reply->dpcd_revision,
> +			      port_reply->mcs,
> +			      port_reply->ddps,
> +			      port_reply->legacy_device_plug_status,
> +			      port_reply->num_sdp_streams,
> +			      port_reply->num_sdp_stream_sinks);
> +	}
> +}
> +
>  static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
>  				     struct drm_dp_mst_branch *mstb)
>  {
> @@ -2038,18 +2060,7 @@ static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
>  			DRM_DEBUG_KMS("link address nak received\n");
>  		} else {
>  			DRM_DEBUG_KMS("link address reply: %d\n", txmsg->reply.u.link_addr.nports);
> -			for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
> -				DRM_DEBUG_KMS("port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n", i,
> -				       txmsg->reply.u.link_addr.ports[i].input_port,
> -				       txmsg->reply.u.link_addr.ports[i].peer_device_type,
> -				       txmsg->reply.u.link_addr.ports[i].port_number,
> -				       txmsg->reply.u.link_addr.ports[i].dpcd_revision,
> -				       txmsg->reply.u.link_addr.ports[i].mcs,
> -				       txmsg->reply.u.link_addr.ports[i].ddps,
> -				       txmsg->reply.u.link_addr.ports[i].legacy_device_plug_status,
> -				       txmsg->reply.u.link_addr.ports[i].num_sdp_streams,
> -				       txmsg->reply.u.link_addr.ports[i].num_sdp_stream_sinks);
> -			}
> +			drm_dp_dump_link_address(&txmsg->reply.u.link_addr);
>  
>  			drm_dp_check_mstb_guid(mstb, txmsg->reply.u.link_addr.guid);
>  
> -- 
> 2.21.0
> 

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