From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang xingchao Subject: Re: [PATCH 0/3] Make HDMI ELD usable with hotplug Date: Tue, 19 Feb 2013 10:39:55 +0800 Message-ID: <20130219023954.GA7400@wxc-intel> References: <1361193073-7199-1-git-send-email-david.henningsson@canonical.com> <512231B9.6000408@canonical.com> <20130218223942.GB3605@sci.fi> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by alsa0.perex.cz (Postfix) with ESMTP id 9629E265191 for ; Tue, 19 Feb 2013 04:02:35 +0100 (CET) Content-Disposition: inline In-Reply-To: <20130218223942.GB3605@sci.fi> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: David Henningsson , Takashi Iwai , alsa-devel@alsa-project.org, fengguang.wu@intel.com, pierre-louis.bossart@linux.intel.com, Wang Xingchao List-Id: alsa-devel@alsa-project.org On Tue, Feb 19, 2013 at 12:39:42AM +0200, Ville Syrj=E4l=E4 wrote: > On Mon, Feb 18, 2013 at 02:50:49PM +0100, David Henningsson wrote: > > On 02/18/2013 02:35 PM, Takashi Iwai wrote: > > > At Mon, 18 Feb 2013 14:11:10 +0100, > > > David Henningsson wrote: > > >> > > >> I'm experimenting with using ELD information in PulseAudio and found > > >> that it didn't work very well with hotplugging. > > >> Neither the proc file nor the ELD kcontrol was cleared correctly aft= er > > >> unplug, and there was no way (except polling) to find out when ELD > > >> has become available. > > > > > > Did you try Xingchao's patch for drm/i915? It's queued in > > > drm-intel-next: > > > > > > commit 7b9f35a6dd72f89452c58bbdbaf063027bf857ec > > > Author: Wang Xingchao > > > Date: Tue Jan 22 23:25:25 2013 +0800 > > > > > > drm/i915: HDMI/DP - ELD info refresh support for Haswell > > = > > Thanks for the hint. I'm currently developing not on a Haswell machine, = > > but an (I think) Arrandale that I bought a few years ago. So I guess = > > this patch does not have any effect on my hw? > = > While reviewing that patch I asked whether we need something like that > on other platforms. Unfortunately I didn't get a real answer. The logic > in the patch would seem to apply equally to all platforms, not just HSW. > We also seem to be doing silly things like flipping the ELD valid bit Yes i agree it's a common issue should be fixed not only for HSW. In fact i started to fix the hotplug issue when it's reported from Chromeos, and the hardware is for Ivybridge/Sandybridge only. Later we find HSW has same prob= lem and we fix it too. I donot have Arrandle HW for test/verify, but if it's same issue, i can continue to fix it. thanks --xingchao > in the register on and off a few times when we update the ELD. But I'm > not all that familiar with the topic so take my ramblings with a pinch > of salt. > = > But in any case, if you're seeing a problem with the behaviour of i915 > you should definitely report it. > = > -- = > Ville Syrj=E4l=E4 > syrjala@sci.fi > http://www.sci.fi/~syrjala/ > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel