linux-kernel - Re: [PATCH 4.19 102/219] ALSA: hda/hdmi

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Date:   Mon, 30 Dec 2019 15:01:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Cc:     Pavel Machek <pavel@...x.de>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Takashi Iwai <tiwai@...e.de>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.19 102/219] ALSA: hda/hdmi - implement
 mst_no_extra_pcms flag

On Mon, Dec 30, 2019 at 02:58:25PM +0200, Kai Vehmanen wrote:
> Hi,
> 
> On Mon, 30 Dec 2019, Pavel Machek wrote:
> 
> > > From: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
> > > 
> > > [ Upstream commit 2a2edfbbfee47947dd05f5860c66c0e80ee5e09d ]
> > > 
> > > To support the DP-MST multiple streams via single connector feature,
> > > the HDMI driver was extended with the concept of backup PCMs. See
> > > commit 9152085defb6 ("ALSA: hda - add DP MST audio support").
> [...]
> > This variable is not ever set in this patch, nor is it set elsewhere
> > in 4.19-stable. This means this patch is not suitable for stable.
> 
> ack on that. In upstream this flag is only used by SOF (sound/soc/sof)
> currently, but SOF is not part of 4.19, so there are no users for this 
> flag. Sorry for not catching this sooner.

Will go drop it from 4.19.y, thanks.  But is this ok also for 5.4.y?

thanks,

greg k-h