@@ -42,16 +42,54 @@ static void *ac97_create(void *pci_bus, QGuestAllocator *alloc, void *addr)
return &ac97->obj;
}
+/*
+ * This is rather a test of the audio subsystem and not an AC97 test. Test if
+ * the audio subsystem can handle a 44100/1 upsample ratio. For some time this
+ * used to trigger QEMU aborts.
+ */
+static void ac97_playback_upsample(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QAC97 *ac97 = obj;
+ QPCIDevice *dev = &ac97->dev;
+ QPCIBar bar0;
+
+ qpci_device_enable(dev);
+ bar0 = qpci_iomap(dev, 0, NULL);
+ /* IOBAR0 offset 0x2c: PCM Front DAC Rate */
+ qpci_io_writew(dev, bar0, 0x2c, 0x1);
+}
+
+/*
+ * This test is similar to the playback upsample test. QEMU shouldn't abort if
+ * asked for a 1/44100 downsample ratio.
+ */
+static void ac97_record_downsample(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QAC97 *ac97 = obj;
+ QPCIDevice *dev = &ac97->dev;
+ QPCIBar bar0;
+
+ qpci_device_enable(dev);
+ bar0 = qpci_iomap(dev, 0, NULL);
+ /* IOBAR0 offset 0x32: PCM L/R ADC Rate */
+ qpci_io_writew(dev, bar0, 0x32, 0x1);
+}
+
static void ac97_register_nodes(void)
{
QOSGraphEdgeOptions opts = {
- .extra_device_opts = "addr=04.0",
+ .extra_device_opts = "addr=04.0,audiodev=snd0",
+ .after_cmd_line = "-audiodev none,id=snd0"
+ ",out.frequency=44100,in.frequency=44100",
};
add_qpci_address(&opts, &(QPCIAddress) { .devfn = QPCI_DEVFN(4, 0) });
qos_node_create_driver("AC97", ac97_create);
qos_node_produces("AC97", "pci-device");
qos_node_consumes("AC97", "pci-bus", &opts);
+
+ qos_add_test("playback_upsample", "AC97", ac97_playback_upsample, NULL);
+ qos_add_test("record_downsample", "AC97", ac97_record_downsample, NULL);
}
libqos_init(ac97_register_nodes);
Test if the audio subsystem can handle extreme up- and down- sampling ratios like 44100/1 and 1/44100. For some time these used to trigger QEMU aborts. The test was taken from https://gitlab.com/qemu-project/qemu/-/issues/71 where it was used to demonstrate a very different issue. Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Volker Rümelin <vr_qemu@t-online.de> --- v2: Cosmetic changes to the comments. The promised improved commit message appeared in commit b9ae74e2e4 ("audio: log unimplemented audio device sample rates"). tests/qtest/ac97-test.c | 40 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-)