linux-kernel - Re: [PATCH v2] ALSA: hda/hdmi: Add quirk to force connectivity

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Message-ID: <s5h8seuzeqp.wl-tiwai@suse.de>
Date:   Tue, 04 Aug 2020 16:07:26 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     tiwai@...e.com, Jaroslav Kysela <perex@...ex.cz>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Nikhil Mahale <nmahale@...dia.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Aaron Plattner <aplattner@...dia.com>,
        alsa-devel@...a-project.org (moderated list:SOUND),
        linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH v2] ALSA: hda/hdmi: Add quirk to force connectivity

On Tue, 04 Aug 2020 15:48:00 +0200,
Kai-Heng Feng wrote:
> 
> HDMI on some platforms doesn't enable audio support because its Port
> Connectivity [31:30] is set to AC_JACK_PORT_NONE:
> Node 0x05 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
>   Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>   Amp-Out vals:  [0x00 0x00]
>   Pincap 0x0b000094: OUT Detect HBR HDMI DP
>   Pin Default 0x58560010: [N/A] Digital Out at Int HDMI
>     Conn = Digital, Color = Unknown
>     DefAssociation = 0x1, Sequence = 0x0
>   Pin-ctls: 0x40: OUT
>   Unsolicited: tag=00, enabled=0
>   Power states:  D0 D3 EPSS
>   Power: setting=D0, actual=D0
>   Devices: 0
>   Connection: 3
>      0x02 0x03* 0x04
> 
> For now, use a quirk to force connectivity based on SSID. If there are
> more platforms affected by the same issue, we can eye for a more generic
> solution.
> 
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
> v2:
>  - Use a quirk list instead.

Thanks.  It's almost good, but just one thing:

> --- a/include/sound/hda_codec.h
> +++ b/include/sound/hda_codec.h
> @@ -254,6 +254,7 @@ struct hda_codec {
>  	unsigned int link_down_at_suspend:1; /* link down at runtime suspend */
>  	unsigned int relaxed_resume:1;	/* don't resume forcibly for jack */
>  	unsigned int mst_no_extra_pcms:1; /* no backup PCMs for DP-MST */
> +	unsigned int force_connect:1; /* force connectivity */

I prefer adding the new flag to struct hda_spec.  It's a HDMI-specific
flag and used only there.


Takashi