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| author | Takashi Iwai <tiwai@suse.de> | 2015-03-26 14:18:34 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-03-26 14:18:34 +0100 |
| commit | 8bc174e9e3079b2475fb09e244f71fd57de7a802 (patch) | |
| tree | 2c2bf1eadf650635e250e77670b70e7fa234202d /sound/hda | |
| parent | 40ba66a702b83f46c53456eaaac692fc12f82cb0 (diff) | |
| download | linux-8bc174e9e3079b2475fb09e244f71fd57de7a802.tar.gz linux-8bc174e9e3079b2475fb09e244f71fd57de7a802.tar.bz2 linux-8bc174e9e3079b2475fb09e244f71fd57de7a802.zip | |
ALSA: hda - Handle a few verbs as read-only
Although they can be written, handle a few verbs as read-only in
regmap interface: CONFIG_DEFAULT, CONV and CVT_CHAN_COUNT. These are
either updated in PCM or HDMI management code in a volatile manner, or
just needed only as parameter, thus they don't need to be written at
resume sync.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda')
| -rw-r--r-- | sound/hda/hdac_regmap.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c index e1dcf104d273..d401e5c69fe3 100644 --- a/sound/hda/hdac_regmap.c +++ b/sound/hda/hdac_regmap.c @@ -88,7 +88,6 @@ static bool hda_writeable_reg(struct device *dev, unsigned int reg) switch (verb) { case AC_VERB_GET_CONNECT_SEL: case AC_VERB_GET_SDI_SELECT: - case AC_VERB_GET_CONV: case AC_VERB_GET_PIN_WIDGET_CONTROL: case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */ case AC_VERB_GET_BEEP_CONTROL: @@ -96,14 +95,12 @@ static bool hda_writeable_reg(struct device *dev, unsigned int reg) case AC_VERB_GET_DIGI_CONVERT_1: case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */ case AC_VERB_GET_VOLUME_KNOB_CONTROL: - case AC_VERB_GET_CONFIG_DEFAULT: case AC_VERB_GET_GPIO_MASK: case AC_VERB_GET_GPIO_DIRECTION: case AC_VERB_GET_GPIO_DATA: /* not for volatile read */ case AC_VERB_GET_GPIO_WAKE_MASK: case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK: case AC_VERB_GET_GPIO_STICKY_MASK: - case AC_VERB_GET_CVT_CHAN_COUNT: return true; } @@ -123,6 +120,13 @@ static bool hda_readable_reg(struct device *dev, unsigned int reg) case AC_VERB_GET_CONNECT_LIST: case AC_VERB_GET_SUBSYSTEM_ID: return true; + /* below are basically writable, but disabled for reducing unnecessary + * writes at sync + */ + case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */ + case AC_VERB_GET_CONV: /* managed in PCM code */ + case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */ + return true; } return hda_writeable_reg(dev, reg); |