[ALSA] hda-codec - introduce command register cache
This patch adds the cache for codec command registers.
snd_hda_codec_write_cache() and snd_hda_sequence_write_cache() do
the write operations with caching, which values can be resumed via
snd_hda_codec_resume_cache().
The patch introduces only the framework, and no codec code is using
this cache yet. It'll be implemented in the following patch.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 1a69743..ef94c91 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -570,6 +570,7 @@
u32 *wcaps;
struct hda_cache_rec amp_cache; /* cache for amp access */
+ struct hda_cache_rec cmd_cache; /* cache for other commands */
struct mutex spdif_mutex;
unsigned int spdif_status; /* IEC958 status bits */
@@ -620,6 +621,13 @@
/* unsolicited event */
int snd_hda_queue_unsol_event(struct hda_bus *bus, u32 res, u32 res_ex);
+/* cached write */
+int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,
+ int direct, unsigned int verb, unsigned int parm);
+void snd_hda_sequence_write_cache(struct hda_codec *codec,
+ const struct hda_verb *seq);
+void snd_hda_codec_resume_cache(struct hda_codec *codec);
+
/*
* Mixer
*/