ALSA: hda - Use regmap for command verb caches, too

Like the previous patches, this patch converts also to the regmap, at
this time, the cached verb writes are the target.  But this conversion
needs a bit more caution than before.

- In the old code, we just record any verbs as is, and restore them at
  resume.  For the regmap scheme, this doesn't work, since a few verbs
  like AMP or DIGI_CONVERT are asymmetrical.  Such verbs are converted
  either to the dedicated function (snd_hda_regmap_xxx_amp()) or
  changed to the unified verb.

- Some verbs have to be declared as vendor-specific ones before
  accessing via regmap.

Also, the minor optimization with codec->cached_write flag is dropped
in a few places, as this would confuse the operation.  Further
optimizations will be brought in the later patches, if any.

This conversion ends up with a drop of significant amount of codes,
mostly the helper codes that are no longer used.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_conexant.c

@@ -302,6 +302,7 @@ static void cxt_fixup_headphone_mic(struct hda_codec *codec,
 	switch (action) {
 	case HDA_FIXUP_ACT_PRE_PROBE:
 		spec->parse_flags |= HDA_PINCFG_HEADPHONE_MIC;
+		snd_hdac_regmap_add_vendor_verb(&codec->core, 0x410);
 		break;
 	case HDA_FIXUP_ACT_PROBE:
 		spec->gen.cap_sync_hook = cxt_update_headset_mode_hook;
@@ -409,15 +410,11 @@ static void olpc_xo_automic(struct hda_codec *codec,
 			    struct hda_jack_callback *jack)
 {
 	struct conexant_spec *spec = codec->spec;
-	int saved_cached_write = codec->cached_write;
 
-	codec->cached_write = 1;
 	/* in DC mode, we don't handle automic */
 	if (!spec->dc_enable)
 		snd_hda_gen_mic_autoswitch(codec, jack);
 	olpc_xo_update_mic_pins(codec);
-	snd_hda_codec_flush_cache(codec);
-	codec->cached_write = saved_cached_write;
 	if (spec->dc_enable)
 		olpc_xo_update_mic_boost(codec);
 }