ALSA: hda - Modularize HD-audio driver

Split the monolithc HD-audio driver into several pieces:
 - snd-hda-intel   HD-audio PCI controller driver; loaded via udev
 - snd-hda-codec   HD-audio codec bus driver
 - snd-hda-codec-* Specific HD-audio codec drivers

When built as modules, snd-hda-codec (that is invoked by snd-hda-intel)
looks up the codec vendor ID and loads the corresponding codec module
automatically via request_module().

When built in a kernel, each codec drivers are statically hooked up
before probing the PCI.

This patch adds appropriate EXPORT_SYMBOL_GPL()'s and the module
information for each driver, and driver-linking codes between
codec-bus and codec drivers.

TODO:
  - Avoid EXPORT_SYMBOL*() when built-in kernel
  - Restore __devinit appropriately depending on the condition

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

1 files changed, 28 insertions, 2 deletions

diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index fe08bef897cd..290da562f29b 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -32,7 +32,6 @@
 #include <sound/core.h>
 #include "hda_codec.h"
 #include "hda_local.h"
-#include "hda_patch.h"
 
 #define CVT_NID         0x02    /* audio converter */
 #define PIN_NID         0x03    /* HDMI output pin */
@@ -675,7 +674,7 @@ static int patch_intel_hdmi(struct hda_codec *codec)
         return 0;
 }
 
-struct hda_codec_preset snd_hda_preset_intelhdmi[] = {
+static struct hda_codec_preset snd_hda_preset_intelhdmi[] = {
         { .id = 0x808629fb, .name = "INTEL G45 DEVCL",  .patch = patch_intel_hdmi },
         { .id = 0x80862801, .name = "INTEL G45 DEVBLC", .patch = patch_intel_hdmi },
         { .id = 0x80862802, .name = "INTEL G45 DEVCTG", .patch = patch_intel_hdmi },
@@ -683,3 +682,30 @@ struct hda_codec_preset snd_hda_preset_intelhdmi[] = {
         { .id = 0x10951392, .name = "SiI1392 HDMI",     .patch = patch_intel_hdmi },
         {} /* terminator */
 };
+
+MODULE_ALIAS("snd-hda-codec-id:808629fb");
+MODULE_ALIAS("snd-hda-codec-id:80862801");
+MODULE_ALIAS("snd-hda-codec-id:80862802");
+MODULE_ALIAS("snd-hda-codec-id:80862803");
+MODULE_ALIAS("snd-hda-codec-id:10951392");
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Intel HDMI HD-audio codec");
+
+static struct hda_codec_preset_list intel_list = {
+        .preset = snd_hda_preset_intelhdmi,
+        .owner = THIS_MODULE,
+};
+
+static int __init patch_intelhdmi_init(void)
+{
+        return snd_hda_add_codec_preset(&intel_list);
+}
+
+static void __exit patch_intelhdmi_exit(void)
+{
+        snd_hda_delete_codec_preset(&intel_list);
+}
+
+module_init(patch_intelhdmi_init)
+module_exit(patch_intelhdmi_exit)