linux-kernel - Re: [PATCH AUTOSEL 4.4 7/9] ALSA: hda/hdmi: fix failures at PCM open on Intel ICL and later

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Message-ID: <alpine.DEB.2.22.394.2007151332320.3186@eliteleevi.tm.intel.com>
Date:   Wed, 15 Jul 2020 13:52:05 +0300 (EEST)
From:   Kai Vehmanen <kai.vehmanen@...ux.intel.com>
To:     Sasha Levin <sashal@...nel.org>
cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        alsa-devel@...a-project.org,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.de>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Subject: Re: [PATCH AUTOSEL 4.4 7/9] ALSA: hda/hdmi: fix failures at PCM open
 on Intel ICL and later

Hi Sasha,

On Tue, 14 Jul 2020, Sasha Levin wrote:

> From: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
> 
> [ Upstream commit 56275036d8185f92eceac7479d48b858ee3dab84 ]
> 
> When HDMI PCM devices are opened in a specific order, with at least one
> HDMI/DP receiver connected, ALSA PCM open fails to -EBUSY on the
> connected monitor, on recent Intel platforms (ICL/JSL and newer). While

we don't have Ice Lake hardware support in the HDA HDMI codec driver in 
any 4.x stable trees (only in 5.1+), so this patch will not help on those 
and can be dropped.

Br, Kai