ALSA: hda: cs35l41: Save Subsystem ID inside CS35L41 Driver

The Subsystem ID is read from the HDA driver, and will
be used by the CS35L41 driver to be able to uniquely
identify the laptop, which is required to be able to
define firmware to be used by specific models.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220630002335.366545-6-vitalyr@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index d68d951..25cb764 100644 (file)
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -355,6 +355,9 @@ static int cs35l41_hda_bind(struct device *dev, struct device *master, void *mas
                return -EBUSY;
 
        comps->dev = dev;
+       if (!cs35l41->acpi_subsystem_id)
+               cs35l41->acpi_subsystem_id = devm_kasprintf(dev, GFP_KERNEL, "%.8x",
+                                                           comps->codec->core.subsystem_id);
        cs35l41->codec = comps->codec;
        strscpy(comps->name, dev_name(dev), sizeof(comps->name));
        comps->playback_hook = cs35l41_hda_playback_hook;

diff --git a/sound/pci/hda/cs35l41_hda.h b/sound/pci/hda/cs35l41_hda.h
index 5814af0..b57f59a 100644 (file)
--- a/sound/pci/hda/cs35l41_hda.h
+++ b/sound/pci/hda/cs35l41_hda.h
@@ -42,6 +42,7 @@ struct cs35l41_hda {
        int channel_index;
        unsigned volatile long irq_errors;
        const char *amp_name;
+       const char *acpi_subsystem_id;
        struct mutex fw_mutex;
        struct regmap_irq_chip_data *irq_data;
        bool firmware_running;