On Mon, 05 Oct 2015 16:09:51 +0200, Vinod Koul wrote:
From: "Subhransu S. Prusty" subhransu.s.prusty@intel.com
This adds helpers to read/write the codec. Also adds a helper to check the power state of widgets.
Signed-off-by: Subhransu S. Prusty subhransu.s.prusty@intel.com Signed-off-by: Vinod Koul vinod.koul@intel.com
include/sound/hdaudio.h | 6 ++++++ sound/hda/hdac_device.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+)
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 49bc836fcd84..26e956f4b7c6 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -147,6 +147,12 @@ int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid, bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, unsigned int format);
+int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm);+int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm);+bool snd_hdac_check_power_state(struct hdac_device *hdac,
hda_nid_t nid, unsigned int target_state);/**
- snd_hdac_read_parm - read a codec parameter
- @codec: the codec object
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index db96042a497f..24c7a5f6f0f3 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -952,3 +952,50 @@ bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, return true; } EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
+static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm)+{
- unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
- unsigned int res;
- if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
return -1;- return res;
+}
+static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm)+{
- unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
- return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
+}
+int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm)+{
- return codec_read(hdac, nid, flags, verb, parm);
+} +EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
For *every* exported function, you must provide a proper documentation. No excuse, as this is even a part of API.
And, you copied these things from sound/pci/hda/, so you should mention it, and prepare a cleanup patch to use this new one. Otherwise no one can see a clear merit of this addition.
thanks,
Takashi
+int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm)+{
- return codec_write(hdac, nid, flags, verb, parm);
+} +EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
+bool snd_hdac_check_power_state(struct hdac_device *hdac,
hda_nid_t nid, unsigned int target_state)+{
- unsigned int state = codec_read(hdac, nid, 0,
AC_VERB_GET_POWER_STATE, 0);- if (state & AC_PWRST_ERROR)
return true;- state = (state >> 4) & 0x0f;
- return (state == target_state);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
2.4.3