ALSA: hda - Create own device struct for each codec

As the HD-audio is treated individually in each codec driver, it's
more convenient to assign an own struct device to each codec object.
Then we'll be able to use dev_err() more easily for each codec, for
example.

For achieving it, this patch just creates an object "hdaudioCxDy".
It belongs to sound class instead of creating a new bus, just for
simplicity, at this stage.  No pm ops is implemented in the device
struct level but currently it's merely a container.  The PCM and hwdep
devices are now children of this codec device.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

4 files changed, 39 insertions, 3 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 5ea1156954ab..98baf5674a63 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1368,7 +1368,7 @@ static void snd_hda_codec_free(struct hda_codec *codec)
         kfree(codec->modelname);
         kfree(codec->wcaps);
         codec->bus->num_codecs--;
-        kfree(codec);
+        put_device(&codec->dev);
 }
 
 static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec,
@@ -1377,12 +1377,33 @@ static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec,
 static unsigned int hda_set_power_state(struct hda_codec *codec,
                                 unsigned int power_state);
 
+static int snd_hda_codec_dev_register(struct snd_device *device)
+{
+        struct hda_codec *codec = device->device_data;
+
+        return device_add(&codec->dev);
+}
+
+static int snd_hda_codec_dev_disconnect(struct snd_device *device)
+{
+        struct hda_codec *codec = device->device_data;
+
+        device_del(&codec->dev);
+        return 0;
+}
+
 static int snd_hda_codec_dev_free(struct snd_device *device)
 {
         snd_hda_codec_free(device->device_data);
         return 0;
 }
 
+/* just free the container */
+static void snd_hda_codec_dev_release(struct device *dev)
+{
+        kfree(container_of(dev, struct hda_codec, dev));
+}
+
 /**
  * snd_hda_codec_new - create a HDA codec
  * @bus: the bus to assign
@@ -1400,6 +1421,8 @@ int snd_hda_codec_new(struct hda_bus *bus,
         hda_nid_t fg;
         int err;
         static struct snd_device_ops dev_ops = {
+                .dev_register = snd_hda_codec_dev_register,
+                .dev_disconnect = snd_hda_codec_dev_disconnect,
                 .dev_free = snd_hda_codec_dev_free,
         };
 
@@ -1420,6 +1443,13 @@ int snd_hda_codec_new(struct hda_bus *bus,
                 return -ENOMEM;
         }
 
+        device_initialize(&codec->dev);
+        codec->dev.parent = &bus->card->card_dev;
+        codec->dev.class = sound_class;
+        codec->dev.release = snd_hda_codec_dev_release;
+        dev_set_name(&codec->dev, "hdaudioC%dD%d", bus->card->number,
+                     codec_addr);
+
         codec->bus = bus;
         codec->addr = codec_addr;
         mutex_init(&codec->spdif_mutex);
@@ -1453,8 +1483,8 @@ int snd_hda_codec_new(struct hda_bus *bus,
         if (codec->bus->modelname) {
                 codec->modelname = kstrdup(codec->bus->modelname, GFP_KERNEL);
                 if (!codec->modelname) {
-                        snd_hda_codec_free(codec);
-                        return -ENODEV;
+                        err = -ENODEV;
+                        goto error;
                 }
         }
 
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index ab2a444ba501..4d9dd2b70f4a 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -271,6 +271,7 @@ struct hda_pcm {
 
 /* codec information */
 struct hda_codec {
+        struct device dev;
         struct hda_bus *bus;
         unsigned int addr;      /* codec addr*/
         struct list_head list;  /* list point */
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 0fada0f8cfe8..896d116ca951 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -155,6 +155,9 @@ int snd_hda_create_hwdep(struct hda_codec *codec)
         snd_array_init(&codec->hints, sizeof(struct hda_hint), 32);
         snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16);
 
+        /* link to codec */
+        hwdep->dev = &codec->dev;
+
         return 0;
 }
 
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 0870f5f3ed1c..459f54da8d6b 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2663,6 +2663,8 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
                                               snd_dma_pci_data(chip->pci),
                                               size, MAX_PREALLOC_SIZE);
+        /* link to codec */
+        pcm->dev = &codec->dev;
         return 0;
 }