usb: gadget: f_uac1: Change volume name and remove alt names

This changes the UAPI to align with disussion of alt settings work.

fu_name is renamed to fu_vol_name, and alt settings mode names
are removed for now in favor of future work where they will be
settable in subdirectories for each alt mode.

discussion thread for api changes for alt mode settings:
https://lore.kernel.org/linux-usb/35be4668-58d3-894a-72cf-de1afaacae45@ivitera.com/T/

Signed-off-by: Chris Wulff <crwulff@gmail.com>
Link: https://lore.kernel.org/r/20240804002912.3293177-2-crwulff@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 28 insertions, 44 deletions

diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index 06a220fb7a87..c87e74afc881 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -1251,19 +1251,19 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 
 	strings_uac1[STR_AC_IF].s = audio_opts->function_name;
 
-	strings_uac1[STR_USB_OUT_IT].s = audio_opts->p_it_name;
-	strings_uac1[STR_USB_OUT_IT_CH_NAMES].s = audio_opts->p_it_ch_name;
-	strings_uac1[STR_IO_OUT_OT].s = audio_opts->p_ot_name;
-	strings_uac1[STR_FU_OUT].s = audio_opts->p_fu_name;
-	strings_uac1[STR_AS_OUT_IF_ALT0].s = audio_opts->p_alt0_name;
-	strings_uac1[STR_AS_OUT_IF_ALT1].s = audio_opts->p_alt1_name;
-
-	strings_uac1[STR_IO_IN_IT].s = audio_opts->c_it_name;
-	strings_uac1[STR_IO_IN_IT_CH_NAMES].s = audio_opts->c_it_ch_name;
-	strings_uac1[STR_USB_IN_OT].s = audio_opts->c_ot_name;
-	strings_uac1[STR_FU_IN].s = audio_opts->c_fu_name;
-	strings_uac1[STR_AS_IN_IF_ALT0].s = audio_opts->c_alt0_name;
-	strings_uac1[STR_AS_IN_IF_ALT1].s = audio_opts->c_alt1_name;
+	strings_uac1[STR_USB_OUT_IT].s = audio_opts->c_it_name;
+	strings_uac1[STR_USB_OUT_IT_CH_NAMES].s = audio_opts->c_it_ch_name;
+	strings_uac1[STR_IO_OUT_OT].s = audio_opts->c_ot_name;
+	strings_uac1[STR_FU_OUT].s = audio_opts->c_fu_vol_name;
+	strings_uac1[STR_AS_OUT_IF_ALT0].s = "Playback Inactive";
+	strings_uac1[STR_AS_OUT_IF_ALT1].s = "Playback Active";
+
+	strings_uac1[STR_IO_IN_IT].s = audio_opts->p_it_name;
+	strings_uac1[STR_IO_IN_IT_CH_NAMES].s = audio_opts->p_it_ch_name;
+	strings_uac1[STR_USB_IN_OT].s = audio_opts->p_ot_name;
+	strings_uac1[STR_FU_IN].s = audio_opts->p_fu_vol_name;
+	strings_uac1[STR_AS_IN_IF_ALT0].s = "Capture Inactive";
+	strings_uac1[STR_AS_IN_IF_ALT1].s = "Capture Active";
 
 	us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1));
 	if (IS_ERR(us))
@@ -1687,16 +1687,12 @@ UAC1_ATTRIBUTE_STRING(function_name);
 UAC1_ATTRIBUTE_STRING(p_it_name);
 UAC1_ATTRIBUTE_STRING(p_it_ch_name);
 UAC1_ATTRIBUTE_STRING(p_ot_name);
-UAC1_ATTRIBUTE_STRING(p_fu_name);
-UAC1_ATTRIBUTE_STRING(p_alt0_name);
-UAC1_ATTRIBUTE_STRING(p_alt1_name);
+UAC1_ATTRIBUTE_STRING(p_fu_vol_name);
 
 UAC1_ATTRIBUTE_STRING(c_it_name);
 UAC1_ATTRIBUTE_STRING(c_it_ch_name);
 UAC1_ATTRIBUTE_STRING(c_ot_name);
-UAC1_ATTRIBUTE_STRING(c_fu_name);
-UAC1_ATTRIBUTE_STRING(c_alt0_name);
-UAC1_ATTRIBUTE_STRING(c_alt1_name);
+UAC1_ATTRIBUTE_STRING(c_fu_vol_name);
 
 static struct configfs_attribute *f_uac1_attrs[] = {
 	&f_uac1_opts_attr_c_chmask,
@@ -1724,16 +1720,12 @@ static struct configfs_attribute *f_uac1_attrs[] = {
 	&f_uac1_opts_attr_p_it_name,
 	&f_uac1_opts_attr_p_it_ch_name,
 	&f_uac1_opts_attr_p_ot_name,
-	&f_uac1_opts_attr_p_fu_name,
-	&f_uac1_opts_attr_p_alt0_name,
-	&f_uac1_opts_attr_p_alt1_name,
+	&f_uac1_opts_attr_p_fu_vol_name,
 
 	&f_uac1_opts_attr_c_it_name,
 	&f_uac1_opts_attr_c_it_ch_name,
 	&f_uac1_opts_attr_c_ot_name,
-	&f_uac1_opts_attr_c_fu_name,
-	&f_uac1_opts_attr_c_alt0_name,
-	&f_uac1_opts_attr_c_alt1_name,
+	&f_uac1_opts_attr_c_fu_vol_name,
 
 	NULL,
 };
@@ -1789,19 +1781,15 @@ static struct usb_function_instance *f_audio_alloc_inst(void)
 
 	scnprintf(opts->function_name, sizeof(opts->function_name), "AC Interface");
 
-	scnprintf(opts->p_it_name, sizeof(opts->p_it_name), "Playback Input terminal");
-	scnprintf(opts->p_it_ch_name, sizeof(opts->p_it_ch_name), "Playback Channels");
-	scnprintf(opts->p_ot_name, sizeof(opts->p_ot_name), "Playback Output terminal");
-	scnprintf(opts->p_fu_name, sizeof(opts->p_fu_name), "Playback Volume");
-	scnprintf(opts->p_alt0_name, sizeof(opts->p_alt0_name), "Playback Inactive");
-	scnprintf(opts->p_alt1_name, sizeof(opts->p_alt1_name), "Playback Active");
-
-	scnprintf(opts->c_it_name, sizeof(opts->c_it_name), "Capture Input terminal");
-	scnprintf(opts->c_it_ch_name, sizeof(opts->c_it_ch_name), "Capture Channels");
-	scnprintf(opts->c_ot_name, sizeof(opts->c_ot_name), "Capture Output terminal");
-	scnprintf(opts->c_fu_name, sizeof(opts->c_fu_name), "Capture Volume");
-	scnprintf(opts->c_alt0_name, sizeof(opts->c_alt0_name), "Capture Inactive");
-	scnprintf(opts->c_alt1_name, sizeof(opts->c_alt1_name), "Capture Active");
+	scnprintf(opts->p_it_name, sizeof(opts->p_it_name), "Capture Input terminal");
+	scnprintf(opts->p_it_ch_name, sizeof(opts->p_it_ch_name), "Capture Channels");
+	scnprintf(opts->p_ot_name, sizeof(opts->p_ot_name), "Capture Output terminal");
+	scnprintf(opts->p_fu_vol_name, sizeof(opts->p_fu_vol_name), "Capture Volume");
+
+	scnprintf(opts->c_it_name, sizeof(opts->c_it_name), "Playback Input terminal");
+	scnprintf(opts->c_it_ch_name, sizeof(opts->c_it_ch_name), "Playback Channels");
+	scnprintf(opts->c_ot_name, sizeof(opts->c_ot_name), "Playback Output terminal");
+	scnprintf(opts->c_fu_vol_name, sizeof(opts->c_fu_vol_name), "Playback Volume");
 
 	return &opts->func_inst;
 }
diff --git a/drivers/usb/gadget/function/u_uac1.h b/drivers/usb/gadget/function/u_uac1.h
index 67784de9782b..feb6eb76462f 100644
--- a/drivers/usb/gadget/function/u_uac1.h
+++ b/drivers/usb/gadget/function/u_uac1.h
@@ -57,16 +57,12 @@ struct f_uac1_opts {
 	char			p_it_name[USB_MAX_STRING_LEN];
 	char			p_it_ch_name[USB_MAX_STRING_LEN];
 	char			p_ot_name[USB_MAX_STRING_LEN];
-	char			p_fu_name[USB_MAX_STRING_LEN];
-	char			p_alt0_name[USB_MAX_STRING_LEN];
-	char			p_alt1_name[USB_MAX_STRING_LEN];
+	char			p_fu_vol_name[USB_MAX_STRING_LEN];
 
 	char			c_it_name[USB_MAX_STRING_LEN];
 	char			c_it_ch_name[USB_MAX_STRING_LEN];
 	char			c_ot_name[USB_MAX_STRING_LEN];
-	char			c_fu_name[USB_MAX_STRING_LEN];
-	char			c_alt0_name[USB_MAX_STRING_LEN];
-	char			c_alt1_name[USB_MAX_STRING_LEN];
+	char			c_fu_vol_name[USB_MAX_STRING_LEN];
 
 	struct mutex			lock;
 	int				refcnt;