change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/sound/usb/mixer_scarlett.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *   Scarlett Driver for ALSA
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  *
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@@ -12,17 +13,6 @@
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  *
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  *   Code cleanup:
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  *   David Henningsson <david.henningsson at canonical.com>
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- *
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- *   This program is free software; you can redistribute it and/or modify
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- *   it under the terms of the GNU General Public License as published by
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- *   the Free Software Foundation; either version 2 of the License, or
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- *   (at your option) any later version.
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- *
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- *   This program is distributed in the hope that it will be useful,
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- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
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- *
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  */
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 /*
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@@ -152,6 +142,7 @@
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 	SCARLETT_OUTPUTS,
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 	SCARLETT_SWITCH_IMPEDANCE,
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 	SCARLETT_SWITCH_PAD,
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+	SCARLETT_SWITCH_GAIN,
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 };
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 enum {
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@@ -199,6 +190,15 @@
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 	.offsets = {},
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 	.names = (char const * const []){
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 		"0dB", "-10dB"
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+	}
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+};
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+
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+static const struct scarlett_mixer_elem_enum_info opt_gain = {
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+	.start = 0,
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+	.len = 2,
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+	.offsets = {},
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+	.names = (char const * const []){
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+		"Lo", "Hi"
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 	}
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 };
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@@ -662,8 +662,8 @@
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 		{ .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL},
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 		{ .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
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 		{ .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL},
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-		{ .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL},
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-		{ .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL},
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+		{ .num = 3, .type = SCARLETT_SWITCH_GAIN, .name = NULL},
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+		{ .num = 4, .type = SCARLETT_SWITCH_GAIN, .name = NULL},
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 	},
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 	.matrix_mux_init = {
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@@ -893,6 +893,15 @@
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 			if (err < 0)
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 				return err;
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 			break;
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+		case SCARLETT_SWITCH_GAIN:
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+			sprintf(mx, "Input %d Gain Switch", ctl->num);
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+			err = add_new_ctl(mixer, &usb_scarlett_ctl_enum,
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+					  scarlett_ctl_enum_resume, 0x01,
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+					  0x08, ctl->num, USB_MIXER_S16, 1, mx,
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+					  &opt_gain, &elem);
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+			if (err < 0)
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+				return err;
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+			break;
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 		}
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 	}
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