audio: deprecate -soundhw pcspk

Add deprecation message to the audio init function.

Factor out audio initialization and call that from
both audio init and realize, so setting the audiodev
property is enough to properly initialize pcspk.

Add a property alias to the machine type to set the
audio device, so pcspk can be initialized using:
"-machine pcspk-audiodev=<name>"

Using "-global isa-pcspk.audiodev=<name>" works too but
is not recommended.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20200702132525.6849-18-kraxel@redhat.com

2 files changed, 23 insertions, 3 deletions

diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index c37a387..4c7e339 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -28,6 +28,7 @@
 #include "audio/audio.h"
 #include "qemu/module.h"
 #include "qemu/timer.h"
+#include "qemu/error-report.h"
 #include "hw/timer/i8254.h"
 #include "migration/vmstate.h"
 #include "hw/audio/pcspk.h"
@@ -112,11 +113,15 @@ static void pcspk_callback(void *opaque, int free)
     }
 }
 
-static int pcspk_audio_init(ISABus *bus)
+static int pcspk_audio_init(PCSpkState *s)
 {
-    PCSpkState *s = pcspk_state;
     struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUDIO_FORMAT_U8, 0};
 
+    if (s->voice) {
+        /* already initialized */
+        return 0;
+    }
+
     AUD_register_card(s_spk, &s->card);
 
     s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as);
@@ -185,6 +190,10 @@ static void pcspk_realizefn(DeviceState *dev, Error **errp)
 
     isa_register_ioport(isadev, &s->ioport, s->iobase);
 
+    if (s->card.state) {
+        pcspk_audio_init(s);
+    }
+
     pcspk_state = s;
 }
 
@@ -236,9 +245,18 @@ static const TypeInfo pcspk_info = {
     .class_init     = pcspk_class_initfn,
 };
 
+static int pcspk_audio_init_soundhw(ISABus *bus)
+{
+    PCSpkState *s = pcspk_state;
+
+    warn_report("'-soundhw pcspk' is deprecated, "
+                "please set a backend using '-machine pcspk-audiodev=<name>' instead");
+    return pcspk_audio_init(s);
+}
+
 static void pcspk_register(void)
 {
     type_register_static(&pcspk_info);
-    isa_register_soundhw("pcspk", "PC speaker", pcspk_audio_init);
+    isa_register_soundhw("pcspk", "PC speaker", pcspk_audio_init_soundhw);
 }
 type_init(pcspk_register)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 88785f9..c45e7bf 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1892,6 +1892,8 @@ static void pc_machine_initfn(Object *obj)
 
     pc_system_flash_create(pcms);
     pcms->pcspk = isa_new(TYPE_PC_SPEAKER);
+    object_property_add_alias(OBJECT(pcms), "pcspk-audiodev",
+                              OBJECT(pcms->pcspk), "audiodev");
 }
 
 static void pc_machine_reset(MachineState *machine)