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ALSA: firewire-motu: code refactoring for detection of clock source in v2 protocol 

Current implementation of driver has two similar helper functions for
source detection of sampling clock. This commit merges them as a code
refactoring.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210623075941.72562-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2021-06-23 16:59:34 +09:00 committed by Takashi Iwai
parent fa4db23233
commit 25eb438920
1 changed files with 21 additions and 47 deletions
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52
sound/firewire/motu/motu-protocol-v2.c
View File

@ -78,10 +78,10 @@ int snd_motu_protocol_v2_set_clock_rate(struct snd_motu *motu,
sizeof(reg));
}
static int detect_clock_source_optical_model(struct snd_motu *motu, u32 data,
static int get_clock_source(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
switch (data) {
switch (data & V2_CLOCK_SRC_MASK) {
case 0:
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
break;
@ -90,17 +90,26 @@ static int detect_clock_source_optical_model(struct snd_motu *motu, u32 data,
break;
case 2:
{
bool support_iec60958_on_opt = (motu->spec == &snd_motu_spec_828mk2 ||
motu->spec == &snd_motu_spec_traveler);
if (!support_iec60958_on_opt) {
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
} else {
__be32 reg;
// To check the configuration of optical interface.
int err = snd_motu_transaction_read(motu, V2_IN_OUT_CONF_OFFSET, &reg, sizeof(reg));
int err = snd_motu_transaction_read(motu, V2_IN_OUT_CONF_OFFSET, &reg,
sizeof(reg));
if (err < 0)
return err;
if (((data & V2_OPT_IN_IFACE_MASK) >> V2_OPT_IN_IFACE_SHIFT) == V2_OPT_IFACE_MODE_SPDIF)
if (((data & V2_OPT_IN_IFACE_MASK) >> V2_OPT_IN_IFACE_SHIFT) ==
V2_OPT_IFACE_MODE_SPDIF)
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT;
else
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
}
break;
}
case 3:
@ -120,41 +129,6 @@ static int detect_clock_source_optical_model(struct snd_motu *motu, u32 data,
return 0;
}
static int v2_detect_clock_source(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
switch (data) {
case 0:
*src = SND_MOTU_CLOCK_SOURCE_INTERNAL;
break;
case 2:
*src = SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX;
break;
case 3:
*src = SND_MOTU_CLOCK_SOURCE_SPH;
break;
case 4:
*src = SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC;
break;
default:
*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
break;
}
return 0;
}
static int get_clock_source(struct snd_motu *motu, u32 data,
enum snd_motu_clock_source *src)
{
data &= V2_CLOCK_SRC_MASK;
if (motu->spec == &snd_motu_spec_828mk2 ||
motu->spec == &snd_motu_spec_traveler)
return detect_clock_source_optical_model(motu, data, src);
else
return v2_detect_clock_source(motu, data, src);
}
int snd_motu_protocol_v2_get_clock_source(struct snd_motu *motu,
enum snd_motu_clock_source *src)
{