From: Mark Brown Date: Thu, 13 Aug 2026 14:49:35 +0000 (+0100) Subject: ASoC: fsl-asoc-card: Restructure to support deferrable card binding X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=802ff936c7cacb26ef0d92d0170775289ade8587;p=linux ASoC: fsl-asoc-card: Restructure to support deferrable card binding Chancel Liu says: The ASoC core has evolved over several kernel releases to support deferrable card binding: when a component is not yet available, devm_snd_soc_register_card() no longer propagates -EPROBE_DEFER back to the machine driver. Instead the card is placed on an internal deferred list and rebound automatically once the missing component registers. As a result, registering a sound card no longer guarantees that all CPU and codec components have already probed successfully. This exposed two regressions in fsl-asoc-card: 1. The machine driver caches codec MCLK rate during probe(). On platforms where the MCLK is derived from the CPU DAI clock and its final rate is applied via assigned-clocks in the CPU DAI node, probing before the CPU DAI driver completes leaves fsl-asoc-card with a stale mclk_freq. 2. If a card defers due to a missing component, it queues the card onto the unbind_card_list and returns 0. The driver then proceeds to call simple_util_init_jack(). At this point, the snd_card pointer is NULL. Patch 1 drops mclk management for nau8822 from this machine driver. Patch 2 is a pure refactoring with no functional change. the large if/else chain of of_device_is_compatible() calls in probe() is replaced by a platform data table approach. Patch 3 moves all component-dependent initialisation and jacks out of probe() and into late_probe(), which is the correct place under the deferrable binding model. Link: https://patch.msgid.link/20260810093834.1511749-1-chancel.liu@oss.nxp.com --- 802ff936c7cacb26ef0d92d0170775289ade8587