From 7cf5ce66dfda2be444ea668c3d48f732ba4a7fd1 Mon Sep 17 00:00:00 2001 From: Stefan Binding Date: Fri, 21 Jul 2023 16:18:15 +0100 Subject: [PATCH] ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda To ensure consistency between the HDA core and the CS35L41 HDA driver, add a device_link between them. This ensures that the HDA core will suspend first, and resume second, meaning the amp driver will not miss any events from the playback hook from the HDA core during system suspend and resume. Signed-off-by: Stefan Binding Link: https://lore.kernel.org/r/20230721151816.2080453-11-sbinding@opensource.cirrus.com Signed-off-by: Takashi Iwai --- sound/pci/hda/cs35l41_hda.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index 70aa819..175378c 100644 --- a/sound/pci/hda/cs35l41_hda.c +++ b/sound/pci/hda/cs35l41_hda.c @@ -1063,6 +1063,7 @@ static int cs35l41_hda_bind(struct device *dev, struct device *master, void *mas { struct cs35l41_hda *cs35l41 = dev_get_drvdata(dev); struct hda_component *comps = master_data; + unsigned int sleep_flags; int ret = 0; if (!comps || cs35l41->index < 0 || cs35l41->index >= HDA_MAX_COMPONENTS) @@ -1102,6 +1103,11 @@ static int cs35l41_hda_bind(struct device *dev, struct device *master, void *mas mutex_unlock(&cs35l41->fw_mutex); + sleep_flags = lock_system_sleep(); + if (!device_link_add(&comps->codec->core.dev, cs35l41->dev, DL_FLAG_STATELESS)) + dev_warn(dev, "Unable to create device link\n"); + unlock_system_sleep(sleep_flags); + pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); @@ -1112,9 +1118,14 @@ static void cs35l41_hda_unbind(struct device *dev, struct device *master, void * { struct cs35l41_hda *cs35l41 = dev_get_drvdata(dev); struct hda_component *comps = master_data; + unsigned int sleep_flags; - if (comps[cs35l41->index].dev == dev) + if (comps[cs35l41->index].dev == dev) { memset(&comps[cs35l41->index], 0, sizeof(*comps)); + sleep_flags = lock_system_sleep(); + device_link_remove(&comps->codec->core.dev, cs35l41->dev); + unlock_system_sleep(sleep_flags); + } } static const struct component_ops cs35l41_hda_comp_ops = { -- 2.7.4