From patchwork Fri Jul 1 22:22:53 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesse Barnes X-Patchwork-Id: 939282 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p61MOlMD012547 for ; Fri, 1 Jul 2011 22:25:08 GMT Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BC90CA08D8 for ; Fri, 1 Jul 2011 15:24:47 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from oproxy1-pub.bluehost.com (oproxy1-pub.bluehost.com [66.147.249.253]) by gabe.freedesktop.org (Postfix) with SMTP id 9F2839E7E7 for ; Fri, 1 Jul 2011 15:23:03 -0700 (PDT) Received: (qmail 16370 invoked by uid 0); 1 Jul 2011 22:23:02 -0000 Received: from unknown (HELO box514.bluehost.com) (74.220.219.114) by cpoproxy1.bluehost.com with SMTP; 1 Jul 2011 22:23:02 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=virtuousgeek.org; h=Received:From:To:Cc:Subject:Date:Message-Id:X-Mailer:In-Reply-To:References:X-Identified-User; b=lG0CEhF9BvK8Orsd5Tiw4Kll9t3T2klBq5BKTimp1Yp2iNeDkHLCpgDGF54SdWiEQ05YqfM4Rs2g530w+Dtx6C6bSBWDVPwA96jVatVizBhw0ZYy9KABz54bdOq13uca; Received: from c-67-161-37-189.hsd1.ca.comcast.net ([67.161.37.189] helo=localhost.localdomain) by box514.bluehost.com with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69) (envelope-from ) id 1Qcm74-00047w-Ah; Fri, 01 Jul 2011 16:23:02 -0600 From: Jesse Barnes To: intel-gfx@lists.freedesktop.org Date: Fri, 1 Jul 2011 15:22:53 -0700 Message-Id: <1309558978-4704-4-git-send-email-jbarnes@virtuousgeek.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1309558978-4704-1-git-send-email-jbarnes@virtuousgeek.org> References: <1309558978-4704-1-git-send-email-jbarnes@virtuousgeek.org> X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 67.161.37.189 authed with jbarnes@virtuousgeek.org} Subject: [Intel-gfx] [PATCH 3/8] drm/i915/dp: read more receiver capability bits on hotplug X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Fri, 01 Jul 2011 22:25:08 +0000 (UTC) When a hotplug event is received, we need to check the receiver cap bits in case they've changed (as they might with a hub or chain config). Signed-off-by: Jesse Barnes --- drivers/gpu/drm/i915/intel_dp.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 1132ecd..dcef7fd 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1525,6 +1525,8 @@ intel_dp_link_down(struct intel_dp *intel_dp) static void intel_dp_check_link_status(struct intel_dp *intel_dp) { + int ret; + if (!intel_dp->base.base.crtc) return; @@ -1533,6 +1535,15 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) return; } + /* Try to read receiver status if the link appears to be up */ + ret = intel_dp_aux_native_read(intel_dp, + 0x000, intel_dp->dpcd, + sizeof (intel_dp->dpcd)); + if (ret != sizeof(intel_dp->dpcd)) { + intel_dp_link_down(intel_dp); + return; + } + if (!intel_channel_eq_ok(intel_dp)) { intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp);