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author | Ruslan Bilovol <ruslan.bilovol@gmail.com> | 2018-05-04 04:24:02 +0300 |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2018-05-04 09:39:38 +0200 |
commit | eccfc1b868a9902bbfa2315a7c5385dbbf822dc4 (patch) | |
tree | f0932790793c8f2cfcac22572aa6fbac1a7f4262 /sound/usb/mixer.c | |
parent | 3763f6186703d9939913996da1c71d8f8ddb035c (diff) | |
download | linux-eccfc1b868a9902bbfa2315a7c5385dbbf822dc4.tar.bz2 |
ALSA: usb: mixer: make string parsing independent of mixer_build state
Functions like snd_usb_copy_string_desc() or
get_term_name() don't actually need mixer_build
state but can use snd_usb_audio structure instead
to get usb device.
This patch has no functional change but prepares
to future UAC3 BADD profiles support which don't
have class-specific descriptors so won't have
mixer_build state.
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/mixer.c')
-rw-r--r-- | sound/usb/mixer.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 265258b0e74c..76417943ff85 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -201,10 +201,10 @@ static void *find_audio_control_unit(struct mixer_build *state, /* * copy a string with the given id */ -static int snd_usb_copy_string_desc(struct mixer_build *state, +static int snd_usb_copy_string_desc(struct snd_usb_audio *chip, int index, char *buf, int maxlen) { - int len = usb_string(state->chip->dev, index, buf, maxlen - 1); + int len = usb_string(chip->dev, index, buf, maxlen - 1); if (len < 0) return 0; @@ -658,14 +658,14 @@ static struct iterm_name_combo { { 0 }, }; -static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, +static int get_term_name(struct snd_usb_audio *chip, struct usb_audio_term *iterm, unsigned char *name, int maxlen, int term_only) { struct iterm_name_combo *names; int len; if (iterm->name) { - len = snd_usb_copy_string_desc(state, iterm->name, + len = snd_usb_copy_string_desc(chip, iterm->name, name, maxlen); if (len) return len; @@ -1407,7 +1407,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc, len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); mapped_name = len != 0; if (!len && nameid) - len = snd_usb_copy_string_desc(state, nameid, + len = snd_usb_copy_string_desc(state->chip, nameid, kctl->id.name, sizeof(kctl->id.name)); switch (control) { @@ -1422,10 +1422,10 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc, * - otherwise, anonymous name. */ if (!len) { - len = get_term_name(state, iterm, kctl->id.name, + len = get_term_name(state->chip, iterm, kctl->id.name, sizeof(kctl->id.name), 1); if (!len) - len = get_term_name(state, &state->oterm, + len = get_term_name(state->chip, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1); if (!len) @@ -1498,7 +1498,7 @@ static void get_connector_control_name(struct mixer_build *state, struct usb_audio_term *term, bool is_input, char *name, int name_size) { - int name_len = get_term_name(state, term, name, name_size, 0); + int name_len = get_term_name(state->chip, term, name, name_size, 0); if (name_len == 0) strlcpy(name, "Unknown", name_size); @@ -1597,7 +1597,7 @@ static int parse_clock_source_unit(struct mixer_build *state, int unitid, } kctl->private_free = snd_usb_mixer_elem_free; - ret = snd_usb_copy_string_desc(state, hdr->iClockSource, + ret = snd_usb_copy_string_desc(state->chip, hdr->iClockSource, name, sizeof(name)); if (ret > 0) snprintf(kctl->id.name, sizeof(kctl->id.name), @@ -1840,7 +1840,7 @@ static void build_mixer_unit_ctl(struct mixer_build *state, len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); if (!len) - len = get_term_name(state, iterm, kctl->id.name, + len = get_term_name(state->chip, iterm, kctl->id.name, sizeof(kctl->id.name), 0); if (!len) len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); @@ -2154,7 +2154,8 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); len = 0; if (nameid) - len = snd_usb_copy_string_desc(state, nameid, + len = snd_usb_copy_string_desc(state->chip, + nameid, kctl->id.name, sizeof(kctl->id.name)); if (!len) @@ -2350,7 +2351,8 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, len = check_mapped_selector_name(state, unitid, i, namelist[i], MAX_ITEM_NAME_LEN); if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) - len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); + len = get_term_name(state->chip, &iterm, namelist[i], + MAX_ITEM_NAME_LEN, 0); if (! len) sprintf(namelist[i], "Input %u", i); } @@ -2372,12 +2374,12 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, /* if iSelector is given, use it */ nameid = uac_selector_unit_iSelector(desc); if (nameid) - len = snd_usb_copy_string_desc(state, nameid, + len = snd_usb_copy_string_desc(state->chip, nameid, kctl->id.name, sizeof(kctl->id.name)); /* ... or pick up the terminal name at next */ if (!len) - len = get_term_name(state, &state->oterm, + len = get_term_name(state->chip, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 0); /* ... or use the fixed string "USB" as the last resort */ if (!len) |