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hc
2023-12-06 08f87f769b595151be1afeff53e144f543faa614 
 kernel/sound/hda/ext/hdac_ext_stream.c
....@@ -1,18 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  *  hdac-ext-stream.c - HD-audio extended stream operations.
34  *
45  *  Copyright (C) 2015 Intel Corp
56  *  Author: Jeeja KP <jeeja.kp@intel.com>
67  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7
- *
8
- *  This program is free software; you can redistribute it and/or modify
9
- *  it under the terms of the GNU General Public License as published by
10
- *  the Free Software Foundation; version 2 of the License.
11
- *
12
- *  This program is distributed in the hope that it will be useful, but
13
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
14
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
- *  General Public License for more details.
168  *
179  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1810  */
....@@ -114,20 +106,14 @@
114106 }
115107 EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
116108 
117
-/**
118
- * snd_hdac_ext_stream_decouple - decouple the hdac stream
119
- * @bus: HD-audio core bus
120
- * @stream: HD-audio ext core stream object to initialize
121
- * @decouple: flag to decouple
122
- */
123
-void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
124
-				struct hdac_ext_stream *stream, bool decouple)
109
+void snd_hdac_ext_stream_decouple_locked(struct hdac_bus *bus,
110
+					 struct hdac_ext_stream *stream,
111
+					 bool decouple)
125112 {
126113 	struct hdac_stream *hstream = &stream->hstream;
127114 	u32 val;
128115 	int mask = AZX_PPCTL_PROCEN(hstream->index);
129116 
130
-	spin_lock_irq(&bus->reg_lock);
131117 	val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
132118 
133119 	if (decouple && !val)
....@@ -136,6 +122,20 @@
136122 		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
137123 
138124 	stream->decoupled = decouple;
125
+}
126
+EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple_locked);
127
+
128
+/**
129
+ * snd_hdac_ext_stream_decouple - decouple the hdac stream
130
+ * @bus: HD-audio core bus
131
+ * @stream: HD-audio ext core stream object to initialize
132
+ * @decouple: flag to decouple
133
+ */
134
+void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
135
+				  struct hdac_ext_stream *stream, bool decouple)
136
+{
137
+	spin_lock_irq(&bus->reg_lock);
138
+	snd_hdac_ext_stream_decouple_locked(bus, stream, decouple);
139139 	spin_unlock_irq(&bus->reg_lock);
140140 }
141141 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
....@@ -260,6 +260,7 @@
260260 		return NULL;
261261 	}
262262 
263
+	spin_lock_irq(&bus->reg_lock);
263264 	list_for_each_entry(stream, &bus->stream_list, list) {
264265 		struct hdac_ext_stream *hstream = container_of(stream,
265266 						struct hdac_ext_stream,
....@@ -274,17 +275,16 @@
274275 		}
275276 
276277 		if (!hstream->link_locked) {
277
-			snd_hdac_ext_stream_decouple(bus, hstream, true);
278
+			snd_hdac_ext_stream_decouple_locked(bus, hstream, true);
278279 			res = hstream;
279280 			break;
280281 		}
281282 	}
282283 	if (res) {
283
-		spin_lock_irq(&bus->reg_lock);
284284 		res->link_locked = 1;
285285 		res->link_substream = substream;
286
-		spin_unlock_irq(&bus->reg_lock);
287286 	}
287
+	spin_unlock_irq(&bus->reg_lock);
288288 	return res;
289289 }
290290 
....@@ -300,6 +300,7 @@
300300 		return NULL;
301301 	}
302302 
303
+	spin_lock_irq(&bus->reg_lock);
303304 	list_for_each_entry(stream, &bus->stream_list, list) {
304305 		struct hdac_ext_stream *hstream = container_of(stream,
305306 						struct hdac_ext_stream,
....@@ -309,18 +310,17 @@
309310 
310311 		if (!stream->opened) {
311312 			if (!hstream->decoupled)
312
-				snd_hdac_ext_stream_decouple(bus, hstream, true);
313
+				snd_hdac_ext_stream_decouple_locked(bus, hstream, true);
313314 			res = hstream;
314315 			break;
315316 		}
316317 	}
317318 	if (res) {
318
-		spin_lock_irq(&bus->reg_lock);
319319 		res->hstream.opened = 1;
320320 		res->hstream.running = 0;
321321 		res->hstream.substream = substream;
322
-		spin_unlock_irq(&bus->reg_lock);
323322 	}
323
+	spin_unlock_irq(&bus->reg_lock);
324324 
325325 	return res;
326326 }
....@@ -386,15 +386,17 @@
386386 		break;
387387 
388388 	case HDAC_EXT_STREAM_TYPE_HOST:
389
+		spin_lock_irq(&bus->reg_lock);
389390 		if (stream->decoupled && !stream->link_locked)
390
-			snd_hdac_ext_stream_decouple(bus, stream, false);
391
+			snd_hdac_ext_stream_decouple_locked(bus, stream, false);
392
+		spin_unlock_irq(&bus->reg_lock);
391393 		snd_hdac_stream_release(&stream->hstream);
392394 		break;
393395 
394396 	case HDAC_EXT_STREAM_TYPE_LINK:
395
-		if (stream->decoupled && !stream->hstream.opened)
396
-			snd_hdac_ext_stream_decouple(bus, stream, false);
397397 		spin_lock_irq(&bus->reg_lock);
398
+		if (stream->decoupled && !stream->hstream.opened)
399
+			snd_hdac_ext_stream_decouple_locked(bus, stream, false);
398400 		stream->link_locked = 0;
399401 		stream->link_substream = NULL;
400402 		spin_unlock_irq(&bus->reg_lock);
....@@ -538,7 +540,6 @@
538540 
539541 /**
540542  * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
541
- * @bus: HD-audio core bus
542543  * @stream: hdac_ext_stream
543544  * @value: lpib value to set
544545  */