Re: [PATCH] ALSA: ctxfi: Add fallback to default RSR for S/PDIF

Takashi Iwai
2026-04-06T08:51:02Z

On Mon, 06 Apr 2026 09:49:13 +0200,
Harin Lee wrote:
>
> spdif_passthru_playback_get_resources() uses atc->pll_rate as the RSR
> for the MSR calculation loop. However, pll_rate is only updated in
> atc_pll_init() and not in hw_pll_init(), so it remains 0 after the
> card init.
>
> When spdif_passthru_playback_setup() skips atc_pll_init() for
> 32000 Hz, (rsr * desc.msr) always becomes 0, causing the loop to spin
> indefinitely.
>
> Add fallback to use atc->rsr when atc->pll_rate is 0. This reflects
> the hardware state, since hw_card_init() already configures the PLL
> to the default RSR.
>
> Fixes: 8cc72361481f ("ALSA: SB X-Fi driver merge")
> Cc: stable@vger.kernel.org
> Signed-off-by: Harin Lee <me@harin.net>

Applied to for-next branch now. Thanks.

Takashi