@@ -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 = {
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 <sbinding@opensource.cirrus.com> --- sound/pci/hda/cs35l41_hda.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)