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virtio-sound: handle VIRTIO_SND_R_PCM_{START,STOP} 

Handle the start and stop control messages for a stream_id. This request
does nothing at the moment except for replying to it. Audio playback
or capture will be started/stopped here in follow-up commits.

Based-on: 5a2f350eec
Signed-off-by: Igor Skalkin <Igor.Skalkin@opensynergy.com>
Signed-off-by: Anton Yakovlev <Anton.Yakovlev@opensynergy.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <9657dbfe3cb4a48ceb033ceb5977dc08669dfefd.1698062525.git.manos.pitsidianakis@linaro.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Manos Pitsidianakis 2023-10-23 15:03:22 +03:00 committed by Michael S. Tsirkin
parent 0ff05dd209
commit fa131d4a82
2 changed files with 48 additions and 2 deletions
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1
hw/audio/trace-events
View File

@ -49,6 +49,7 @@ virtio_snd_realize(void *snd) "snd %p: realize"
virtio_snd_unrealize(void *snd) "snd %p: unrealize"
virtio_snd_handle_ctrl(void *vdev, void *vq) "snd %p: handle ctrl event for queue %p"
virtio_snd_handle_pcm_info(uint32_t stream) "VIRTIO_SND_R_PCM_INFO called for stream %"PRIu32
virtio_snd_handle_pcm_start_stop(const char *code, uint32_t stream) "%s called for stream %"PRIu32
virtio_snd_handle_code(uint32_t val, const char *code) "ctrl code msg val = %"PRIu32" == %s"
virtio_snd_handle_chmap_info(void) "VIRTIO_SND_CHMAP_INFO called"
virtio_snd_handle_event(void) "event queue callback called"

49
hw/audio/virtio-snd.c
View File

@ -446,6 +446,47 @@ static const char *print_code(uint32_t code)
#undef CASE
};
/*
* Handles VIRTIO_SND_R_PCM_START.
*
* @s: VirtIOSound device
* @cmd: The request command queue element from VirtIOSound cmdq field
* @start: whether to start or stop the device
*/
static void virtio_snd_handle_pcm_start_stop(VirtIOSound *s,
virtio_snd_ctrl_command *cmd,
bool start)
{
VirtIOSoundPCMStream *stream;
virtio_snd_pcm_hdr req;
uint32_t stream_id;
size_t msg_sz = iov_to_buf(cmd->elem->out_sg,
cmd->elem->out_num,
0,
&req,
sizeof(virtio_snd_pcm_hdr));
if (msg_sz != sizeof(virtio_snd_pcm_hdr)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: virtio-snd command size incorrect %zu vs \
%zu\n", __func__, msg_sz, sizeof(virtio_snd_pcm_hdr));
cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG);
return;
}
stream_id = le32_to_cpu(req.stream_id);
cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_OK);
trace_virtio_snd_handle_pcm_start_stop(start ? "VIRTIO_SND_R_PCM_START" :
"VIRTIO_SND_R_PCM_STOP", stream_id);
stream = virtio_snd_pcm_get_stream(s, stream_id);
if (stream == NULL) {
error_report("Invalid stream id: %"PRIu32, req.stream_id);
cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_BAD_MSG);
return;
}
stream->active = start;
}
/*
* The actual processing done in virtio_snd_process_cmdq().
*
@ -486,10 +527,14 @@ process_cmd(VirtIOSound *s, virtio_snd_ctrl_command *cmd)
case VIRTIO_SND_R_PCM_INFO:
virtio_snd_handle_pcm_info(s, cmd);
break;
case VIRTIO_SND_R_PCM_START:
virtio_snd_handle_pcm_start_stop(s, cmd, true);
break;
case VIRTIO_SND_R_PCM_STOP:
virtio_snd_handle_pcm_start_stop(s, cmd, false);
break;
case VIRTIO_SND_R_PCM_SET_PARAMS:
case VIRTIO_SND_R_PCM_PREPARE:
case VIRTIO_SND_R_PCM_START:
case VIRTIO_SND_R_PCM_STOP:
case VIRTIO_SND_R_PCM_RELEASE:
cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP);
break;