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>
diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c
index e1dcf10..d401e5c 100644
--- a/sound/hda/hdac_regmap.c
+++ b/sound/hda/hdac_regmap.c
@@ -88,7 +88,6 @@
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 @@
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 @@
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);