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authorTakashi Iwai <tiwai@suse.de>2015-02-26 15:57:47 +0300
committerTakashi Iwai <tiwai@suse.de>2015-03-23 15:19:37 +0300
commit01ed3c06c6d5e7e861650ae76117dd4194d87316 (patch)
treed75e171cd46b58c985848cfc46a3e0d3492c2496 /include/sound/hdaudio.h
parent4d75faa0448a6bb2fd6d56051a3675a3937cbada (diff)
downloadlinux-01ed3c06c6d5e7e861650ae76117dd4194d87316.tar.xz
ALSA: hda - Use regmap for codec parameter reads
Let's start converting the access functions to regmap. The first one is the simplest, just converting the codec parameter read helper function snd_hda_param_read(). Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/hdaudio.h')
-rw-r--r--include/sound/hdaudio.h20
1 files changed, 19 insertions, 1 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 47e20b741c51..ddfcc44970fa 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -105,12 +105,30 @@ int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
unsigned int flags, unsigned int *res);
int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
unsigned int verb, unsigned int parm, unsigned int *res);
-int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm);
+int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
+ unsigned int *res);
int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
hda_nid_t *conn_list, int max_conns);
int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
hda_nid_t *start_id);
+/**
+ * snd_hdac_read_parm - read a codec parameter
+ * @codec: the codec object
+ * @nid: NID to read a parameter
+ * @parm: parameter to read
+ *
+ * Returns -1 for error. If you need to distinguish the error more
+ * strictly, use _snd_hdac_read_parm() directly.
+ */
+static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
+ int parm)
+{
+ unsigned int val;
+
+ return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
+}
+
#ifdef CONFIG_PM
void snd_hdac_power_up(struct hdac_device *codec);
void snd_hdac_power_down(struct hdac_device *codec);