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

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Date:   Tue, 27 Aug 2019 18:16:38 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Lyude Paul <lyude@...hat.com>
Cc:     Daniel Vetter <daniel@...ll.ch>, 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>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/26] drm/dp_mst: Move link address dumping into a
 function

On Mon, Aug 26, 2019 at 05:51:26PM -0400, Lyude Paul wrote:
> *sigh* finally have some time to go through these reviews

Hey it took me longer to start even reviewing this, and not even through
:-( than it took you to reply here. So no worries!

> jfyi: I realized after looking over this patch that it's not actually needed -
> I had been planning on using drm_dp_dump_link_address() for other things, but
> ended up deciding to make the final plan to use something that dumps into a
> format that's identical to the one we're using for dumping DOWN requests. IMHO
> though, this patch does make things look nicer so I'll probably keep it.
> 
> Assuming I can still count your r-b as valid with a change to the commit
> description?

Sure.

Cheers, Daniel

> 
> On Thu, 2019-08-08 at 21:53 +0200, Daniel Vetter wrote:
> > 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
> > > 
> -- 
> Cheers,
> 	Lyude Paul
> 

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