[PATCH 2/8] ALSA: hda/cirrus: Add model option to codec driver, too

[Takashi Iwai <tiwai@suse.de>]

The model option of snd-hda-intel or SOF driver is useful for testing
/ debugging quirks.  Since many devices have multiple codecs and the
quirk is rather codec-specific, it's often difficult to pass the model
to the proper target.

This patch adds the equivalent model option to Cirrus codec driver, so
that user can optionally specify the option for the codec instead of
snd-hda-intel or SOF drivers.

That is, you can pass the boot option like
  snd_hda_codec_cirrus.model=foobar
or
  snd_hda_codec_cirrus.model=106b:5e00
for applying a quirk.

The model option of snd-hda-intel or SOF is still effective.  When the
option is given for both, the option for the controller driver wins.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_cirrus.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/pci/hda/patch_cirrus.c b/sound/pci/hda/patch_cirrus.c
index 6807b4708a17..c70c72c85831 100644
--- a/sound/pci/hda/patch_cirrus.c
+++ b/sound/pci/hda/patch_cirrus.c
@@ -8,6 +8,7 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <sound/core.h>
 #include <linux/pci.h>
 #include <sound/tlv.h>
@@ -17,6 +18,11 @@
 #include "hda_jack.h"
 #include "hda_generic.h"
 
+/* codec-specific model option -- equivalent with snd-hda-intel.model option */
+static char *codec_model;
+module_param_named(model, codec_model, charp, 0444);
+MODULE_PARM_DESC(model, "Use the given board model.");
+
 /*
  */
 
@@ -581,6 +587,10 @@ static struct cs_spec *cs_alloc_spec(struct hda_codec *codec, int vendor_nid)
 	codec->power_save_node = 1;
 	snd_hda_gen_spec_init(&spec->gen);
 
+	/* assign optional modelname; freed at snd_hda_codec_dev_release() */
+	if (!codec->modelname && codec_model)
+		codec->modelname = kstrdup(codec_model, GFP_KERNEL);
+
 	return spec;
 }
 
-- 
2.35.3