Re: [PATCH] ASoC: hdmi-codec: Fix broken channel map reporting

On Sun, Sep 10, 2023 at 02:14:34PM +0200, Matthias Reichl wrote:

An alternative would be to set chmap_idx to HDMI_CODEC_CHMAP_IDX_UNKNOWN in the non-PCM case so the channel map control will return UNKNOWN for all channels. i.e. use this code instead:

    if (pcm_audio)
            hcp->chmap_idx = ca_id;
    else
            hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;

Any input on that topic is highly appreciated.

This is going to depend a bit on what userspace is expecting which I don't have a good feel for. The above does look reasonable TBH, I'm tempted to go for that.