From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753862AbdGLRGL (ORCPT ); Wed, 12 Jul 2017 13:06:11 -0400 Received: from us01smtprelay-2.synopsys.com ([198.182.47.9]:46656 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753510AbdGLRGK (ORCPT ); Wed, 12 Jul 2017 13:06:10 -0400 From: Alexey Brodkin To: Jose Abreu CC: Carlos Palminha , "dri-devel@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" , "daniel.vetter@ffwll.ch" , "airlied@linux.ie" Subject: Re: [PATCH] drm: arcpgu: Allow some clock deviation in crtc->mode_valid() callback Thread-Topic: [PATCH] drm: arcpgu: Allow some clock deviation in crtc->mode_valid() callback Thread-Index: AQHS71LEVDDdw6wev0aTL5G3GJib5aJQYh0A Date: Wed, 12 Jul 2017 17:06:05 +0000 Message-ID: <1499879164.3875.8.camel@synopsys.com> References: In-Reply-To: Accept-Language: en-US, ru-RU Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.121.3.15] Content-Type: text/plain; charset="utf-8" Content-ID: <55B66E1D2F65CC4D886E2C1FE47FCBB7@internal.synopsys.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by nfs id v6CH6FfN013933 Hi Jose, On Tue, 2017-06-27 at 15:36 +0100, Jose Abreu wrote: > Currently we expect that clock driver produces the exact same value > as we are requiring. There can, and will, be some deviation however > so we need to take into account that instead of rejecting the mode. > > According to HDMI spec we have a max of +-0.5% for the pixel clock > frequency variation. Lets take that into an advantage and use it > to calculate how much deviation we can support. > > This patch was based on today's drm-misc-next. > > Signed-off-by: Jose Abreu > Cc: Carlos Palminha > Cc: Alexey Brodkin > Cc: Daniel Vetter > Cc: Dave Airlie Finally our problem with EDID-less monitor is fixed with that patch. Thus, Acked-by: Alexey Brodkin