From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Packard Subject: Re: [PATCH 4/8] drm/i915/dp: try to read receiver capabilities 3 times when detecting Date: Fri, 01 Jul 2011 16:45:48 -0700 Message-ID: References: <1309558978-4704-1-git-send-email-jbarnes@virtuousgeek.org> <1309558978-4704-5-git-send-email-jbarnes@virtuousgeek.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0989996439==" Return-path: Received: from keithp.com (home.keithp.com [63.227.221.253]) by gabe.freedesktop.org (Postfix) with ESMTP id 9EEBF9E78D for ; Fri, 1 Jul 2011 16:45:51 -0700 (PDT) In-Reply-To: <1309558978-4704-5-git-send-email-jbarnes@virtuousgeek.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Jesse Barnes , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============0989996439== Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" --=-=-= Content-Transfer-Encoding: quoted-printable On Fri, 1 Jul 2011 15:22:54 -0700, Jesse Barnes = wrote: > If ->detect is called too soon after a hot plug event, the sink may not > be ready yet. So try up to 3 times with 1ms sleeps in between tries to > get the data (spec dictates that receivers must be ready to respond within > 1ms and that sources should try 3 times). See previous patch comment -- the dpcd read should be stuffed into a separate function and shared between the four current users. =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iD8DBQFODlwsQp8BWwlsTdMRAunGAKCnZ4KU6jgRj9zitP6G+7iQnVArygCeNCWx uTaYQPQg4+cvxK/1pmq1U7M= =GDlq -----END PGP SIGNATURE----- --=-=-=-- --===============0989996439== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx --===============0989996439==--