On Thu 14 Dec 09:33 PST 2017, srinivas.kandagatla@linaro.org wrote:
From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
This patch adds basic support to Q6 ASM (Audio Stream Manager) module on Q6DSP. ASM supports up to 8 concurrent streams. each stream can be setup as playback/capture.
"...streams, each one setup as either playback or capture".
or "each" need to be capitalized.
ASM provides top control functions like Pause/flush/resume for playback and record. ASM can Create/destroy encoder,
lower case p and c
decoder and also provides POPP dynamic services.
Please describe what POPP is.
[..]
+struct audio_client {
- int session;
- app_cb cb;
- int cmd_state;
- void *priv;
- uint32_t io_mode;
- uint64_t time_stamp;
Unused.
- struct apr_device *adev;
- struct mutex cmd_lock;
- wait_queue_head_t cmd_wait;
- int perf_mode;
- int stream_id;
- struct device *dev;
+};
+struct q6asm {
- struct apr_device *adev;
- int mem_state;
- struct device *dev;
- wait_queue_head_t mem_wait;
- struct mutex session_lock;
- struct platform_device *pcmdev;
- struct audio_client *session[MAX_SESSIONS + 1];
+};
+static int q6asm_session_alloc(struct audio_client *ac, struct q6asm *a)
Move the allocation of ac into this function, and return the newly allocated ac - that way the name of this function makes more sense.
+{
- int n = -EINVAL;
You're returning MAX_SESSIONS if no free sessions are found, but are checking for <= 0 in the caller.
- mutex_lock(&a->session_lock);
- for (n = 1; n <= MAX_SESSIONS; n++) {
Is there an external reason for session 0 not being considered?
if (!a->session[n]) {a->session[n] = ac;break;}- }
If you make session an idr this function would become idr_alloc(1, MAX_SESSIONS + 1).
- mutex_unlock(&a->session_lock);
- return n;
+}
+static bool q6asm_is_valid_audio_client(struct audio_client *ac) +{
- struct q6asm *a = dev_get_drvdata(ac->dev->parent);
- int n;
- for (n = 1; n <= MAX_SESSIONS; n++) {
if (a->session[n] == ac)return 1;
"true"
- }
- return 0;
"false"
+}
+static void q6asm_session_free(struct audio_client *ac) +{
- struct q6asm *a = dev_get_drvdata(ac->dev->parent);
- if (!a)
return;- mutex_lock(&a->session_lock);
- a->session[ac->session] = 0;
- ac->session = 0;
- ac->perf_mode = LEGACY_PCM_MODE;
No need to update ac->*, as you kfree ac as soon as you return from here.
- mutex_unlock(&a->session_lock);
+}
+/**
- q6asm_audio_client_free() - Freee allocated audio client
- @ac: audio client to free
- */
+void q6asm_audio_client_free(struct audio_client *ac) +{
- q6asm_session_free(ac);
Inline q6asm_session_free() here.
- kfree(ac);
+} +EXPORT_SYMBOL_GPL(q6asm_audio_client_free);
+static struct audio_client *q6asm_get_audio_client(struct q6asm *a,
int session_id)+{
- if ((session_id <= 0) || (session_id > MAX_SESSIONS)) {
dev_err(a->dev, "invalid session: %d\n", session_id);goto err;
Just return NULL here instead.
- }
- if (!a->session[session_id]) {
dev_err(a->dev, "session not active: %d\n", session_id);goto err;
Dito
- }
But this is another place where an idr would be preferable, as both these cases would be covered with a call to idr_find()
- return a->session[session_id];
+err:
- return NULL;
+}
+static int q6asm_srvc_callback(struct apr_device *adev, struct apr_client_data *data) +{
- struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
- struct audio_client *ac = NULL;
- uint32_t sid = 0;
This is 4 bits, so just use int.
- uint32_t *payload;
payload is unused.
- if (!data) {
dev_err(&adev->dev, "%s: Invalid CB\n", __func__);return 0;- }
Again, define the apr to never invoke the callback with data = NULL
- payload = data->payload;
- sid = (data->token >> 8) & 0x0F;
- ac = q6asm_get_audio_client(q6asm, sid);
- if (!ac) {
dev_err(&adev->dev, "Audio Client not active\n");return 0;- }
- if (ac->cb)
ac->cb(data->opcode, data->token, data->payload, ac->priv);- return 0;
+}
+/**
- q6asm_get_session_id() - get session id for audio client
- @ac: audio client pointer
- Return: Will be an session id of the audio client.
- */
+int q6asm_get_session_id(struct audio_client *c) +{
- return c->session;
+} +EXPORT_SYMBOL_GPL(q6asm_get_session_id);
+/**
- q6asm_audio_client_alloc() - Allocate a new audio client
- @dev: Pointer to asm child device.
- @cb: event callback.
- @priv: private data associated with this client.
- Return: Will be an error pointer on error or a valid audio client
- on success.
- */
+struct audio_client *q6asm_audio_client_alloc(struct device *dev,
app_cb cb, void *priv)+{
- struct q6asm *a = dev_get_drvdata(dev->parent);
- struct audio_client *ac;
- int n;
- ac = kzalloc(sizeof(struct audio_client), GFP_KERNEL);
sizeof(*ac)
- if (!ac)
return NULL;- n = q6asm_session_alloc(ac, a);
As stated above, moving the kzalloc into q6asm_session_alloc() would clean the code up here, as you only need to deal with one possible error case here.
- if (n <= 0) {
dev_err(dev, "ASM Session alloc fail n=%d\n", n);kfree(ac);return NULL;
Per the kerneldoc I expect an ERR_PTR(n) here.
- }
- ac->session = n;
- ac->cb = cb;
- ac->dev = dev;
- ac->priv = priv;
- ac->io_mode = SYNC_IO_MODE;
- ac->perf_mode = LEGACY_PCM_MODE;
- /* DSP expects stream id from 1 */
- ac->stream_id = 1;
- ac->adev = a->adev;
- init_waitqueue_head(&ac->cmd_wait);
- mutex_init(&ac->cmd_lock);
- ac->cmd_state = 0;
- return ac;
+} +EXPORT_SYMBOL_GPL(q6asm_audio_client_alloc);
Extra newline.
+static int q6asm_probe(struct apr_device *adev) +{
- struct q6asm *q6asm;
- q6asm = devm_kzalloc(&adev->dev, sizeof(*q6asm), GFP_KERNEL);
- if (!q6asm)
return -ENOMEM;- q6asm->dev = &adev->dev;
- q6asm->adev = adev;
- q6asm->mem_state = 0;
- init_waitqueue_head(&q6asm->mem_wait);
- mutex_init(&q6asm->session_lock);
- dev_set_drvdata(&adev->dev, q6asm);
- q6asm->pcmdev = platform_device_register_data(&adev->dev,
"q6asm_dai", -1, NULL, 0);- return 0;
+}
+static int q6asm_remove(struct apr_device *adev) +{
- struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
- platform_device_unregister(q6asm->pcmdev);
- return 0;
+}
+static const struct apr_device_id q6asm_id[] = {
- {"Q6ASM", APR_DOMAIN_ADSP, APR_SVC_ASM, APR_CLIENT_AUDIO},
- {}
+};
+static struct apr_driver qcom_q6asm_driver = {
- .probe = q6asm_probe,
- .remove = q6asm_remove,
- .callback = q6asm_srvc_callback,
- .id_table = q6asm_id,
- .driver = {
.name = "qcom-q6asm",},
Indentation
+};
+module_apr_driver(qcom_q6asm_driver); +MODULE_DESCRIPTION("Q6 Audio Stream Manager driver"); +MODULE_LICENSE("GPL v2"); diff --git a/sound/soc/qcom/qdsp6/q6asm.h b/sound/soc/qcom/qdsp6/q6asm.h new file mode 100644 index 000000000000..7a8a9039fd89 --- /dev/null +++ b/sound/soc/qcom/qdsp6/q6asm.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __Q6_ASM_H__ +#define __Q6_ASM_H__
+#define MAX_SESSIONS 16
+typedef void (*app_cb) (uint32_t opcode, uint32_t token,
uint32_t *payload, void *priv);
This name of a type is too generic.
And make payload void *, unless the payload really really is an unstructured uint32_t array.
Regards, Bjorn