From mboxrd@z Thu Jan 1 00:00:00 1970 From: Todd Previte Subject: [PATCH v3] drm/i915: Enable 5.4Ghz (HBR2) link rate for Displayport 1.2-capable devices Date: Mon, 20 Jan 2014 10:19:38 -0700 Message-ID: <1390238379-11594-1-git-send-email-tprevite@gmail.com> References: <1389927968-2473-1-git-send-email-tprevite@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pb0-f44.google.com (mail-pb0-f44.google.com [209.85.160.44]) by gabe.freedesktop.org (Postfix) with ESMTP id 44C76FAD11 for ; Mon, 20 Jan 2014 09:19:47 -0800 (PST) Received: by mail-pb0-f44.google.com with SMTP id rq2so7214666pbb.17 for ; Mon, 20 Jan 2014 09:19:47 -0800 (PST) Received: from localhost.localdomain (ip70-162-72-129.ph.ph.cox.net. [70.162.72.129]) by mx.google.com with ESMTPSA id xv2sm4733575pbb.39.2014.01.20.09.19.45 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 20 Jan 2014 09:19:46 -0800 (PST) In-Reply-To: <1389927968-2473-1-git-send-email-tprevite@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org More whitepsace cleanup. One caveat with this patch: current link policy dictates that the driver will train the "wide and slow", i.e. max lanes at low speed. It will increase lanes and speed when the specified resolution demands greater bandwidth. Consequently, the resolution will need to be set such that the data rate exceeds the bandwidth provided by 4 lanes @ 2.4Ghz before the driver will use the new 5.4Ghz rate.