Message-Id: <E1fKn2N-0007Bw-Tl@debutante>
Date:   Mon, 21 May 2018 16:47:51 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Mark Brown <broonie@...nel.org>, broonie@...nel.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        bgoswami@...eaurora.org, mark.rutland@....com,
        devicetree@...r.kernel.org, rohkumar@....qualcomm.com,
        gregkh@...uxfoundation.org, plai@...eaurora.org,
        lgirdwood@...il.com, tiwai@...e.com, david.brown@...aro.org,
        robh+dt@...nel.org, linux-arm-kernel@...ts.infradead.org,
        spatakok@....qualcomm.com, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Applied "ASoC: qdsp6: q6asm: Add q6asm driver" to the asoc tree

The patch

   ASoC: qdsp6: q6asm: Add q6asm driver

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a13e872314ae97d3ec8c70de6a01d5904182b049 Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Date: Fri, 18 May 2018 13:56:01 +0100
Subject: [PATCH] ASoC: qdsp6: q6asm: Add q6asm driver

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. ASM provides top control functions like
Pause/flush/resume for playback and record. ASM can Create/destroy encoder,
decoder and also provides POPP dynamic services.

This patch adds support to basic features to allow hdmi playback.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Reviewed-and-tested-by: Rohit kumar <rohitkr@...eaurora.org>
Reviewed-by: Banajit Goswami <bgoswami@...eaurora.org>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 sound/soc/qcom/Kconfig        |   4 +
 sound/soc/qcom/qdsp6/Makefile |   1 +
 sound/soc/qcom/qdsp6/q6asm.c  | 252 ++++++++++++++++++++++++++++++++++
 sound/soc/qcom/qdsp6/q6asm.h  |  15 ++
 4 files changed, 272 insertions(+)
 create mode 100644 sound/soc/qcom/qdsp6/q6asm.c
 create mode 100644 sound/soc/qcom/qdsp6/q6asm.h

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 971127edbc23..941774abd94f 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -53,6 +53,9 @@ config SND_SOC_QDSP6_AFE
 config SND_SOC_QDSP6_ADM
 	tristate
 
+config SND_SOC_QDSP6_ASM
+	tristate
+
 config SND_SOC_QDSP6
 	tristate "SoC ALSA audio driver for QDSP6"
 	depends on QCOM_APR && HAS_DMA
@@ -60,6 +63,7 @@ config SND_SOC_QDSP6
 	select SND_SOC_QDSP6_CORE
 	select SND_SOC_QDSP6_AFE
 	select SND_SOC_QDSP6_ADM
+	select SND_SOC_QDSP6_ASM
 	help
 	 To add support for MSM QDSP6 Soc Audio.
 	 This will enable sound soc platform specific
diff --git a/sound/soc/qcom/qdsp6/Makefile b/sound/soc/qcom/qdsp6/Makefile
index 95cdb3a12694..01d9dcf3375c 100644
--- a/sound/soc/qcom/qdsp6/Makefile
+++ b/sound/soc/qcom/qdsp6/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_SND_SOC_QDSP6_COMMON) += q6dsp-common.o
 obj-$(CONFIG_SND_SOC_QDSP6_CORE) += q6core.o
 obj-$(CONFIG_SND_SOC_QDSP6_AFE) += q6afe.o
 obj-$(CONFIG_SND_SOC_QDSP6_ADM) += q6adm.o
+obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o
diff --git a/sound/soc/qcom/qdsp6/q6asm.c b/sound/soc/qcom/qdsp6/q6asm.c
new file mode 100644
index 000000000000..585fcfbada6a
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6asm.c
@@ -0,0 +1,252 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
+// Copyright (c) 2018, Linaro Limited
+
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <linux/module.h>
+#include <linux/soc/qcom/apr.h>
+#include <linux/device.h>
+#include <linux/of_platform.h>
+#include <linux/spinlock.h>
+#include <linux/kref.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include "q6asm.h"
+#include "q6core.h"
+#include "q6dsp-errno.h"
+#include "q6dsp-common.h"
+
+#define ASM_SYNC_IO_MODE		0x0001
+#define ASM_ASYNC_IO_MODE		0x0002
+#define ASM_TUN_READ_IO_MODE		0x0004	/* tunnel read write mode */
+#define ASM_TUN_WRITE_IO_MODE		0x0008	/* tunnel read write mode */
+
+struct q6asm {
+	struct apr_device *adev;
+	struct device *dev;
+	struct q6core_svc_api_info ainfo;
+	wait_queue_head_t mem_wait;
+	struct platform_device *pcmdev;
+	spinlock_t slock;
+	struct audio_client *session[MAX_SESSIONS + 1];
+	struct platform_device *pdev_dais;
+};
+
+struct audio_client {
+	int session;
+	q6asm_cb cb;
+	void *priv;
+	uint32_t io_mode;
+	struct apr_device *adev;
+	struct mutex cmd_lock;
+	spinlock_t lock;
+	struct kref refcount;
+	wait_queue_head_t cmd_wait;
+	struct aprv2_ibasic_rsp_result_t result;
+	int perf_mode;
+	int stream_id;
+	struct q6asm *q6asm;
+	struct device *dev;
+};
+
+static void q6asm_audio_client_release(struct kref *ref)
+{
+	struct audio_client *ac;
+	struct q6asm *a;
+	unsigned long flags;
+
+	ac = container_of(ref, struct audio_client, refcount);
+	a = ac->q6asm;
+
+	spin_lock_irqsave(&a->slock, flags);
+	a->session[ac->session] = NULL;
+	spin_unlock_irqrestore(&a->slock, flags);
+
+	kfree(ac);
+}
+
+/**
+ * q6asm_audio_client_free() - Freee allocated audio client
+ *
+ * @ac: audio client to free
+ */
+void q6asm_audio_client_free(struct audio_client *ac)
+{
+	kref_put(&ac->refcount, q6asm_audio_client_release);
+}
+EXPORT_SYMBOL_GPL(q6asm_audio_client_free);
+
+static struct audio_client *q6asm_get_audio_client(struct q6asm *a,
+						   int session_id)
+{
+	struct audio_client *ac = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&a->slock, flags);
+	if ((session_id <= 0) || (session_id > MAX_SESSIONS)) {
+		dev_err(a->dev, "invalid session: %d\n", session_id);
+		goto err;
+	}
+
+	/* check for valid session */
+	if (!a->session[session_id])
+		goto err;
+	else if (a->session[session_id]->session != session_id)
+		goto err;
+
+	ac = a->session[session_id];
+	kref_get(&ac->refcount);
+err:
+	spin_unlock_irqrestore(&a->slock, flags);
+	return ac;
+}
+
+static int q6asm_srvc_callback(struct apr_device *adev,
+			       struct apr_resp_pkt *data)
+{
+	struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
+	struct audio_client *ac = NULL;
+	struct apr_hdr *hdr = &data->hdr;
+	uint32_t sid = 0;
+
+	sid = (hdr->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(hdr->opcode, hdr->token, data->payload, ac->priv);
+
+	kref_put(&ac->refcount, q6asm_audio_client_release);
+
+	return 0;
+}
+
+/**
+ * q6asm_get_session_id() - get session id for audio client
+ *
+ * @c: 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.
+ * @stream_id: stream id
+ * @perf_mode: performace mode for 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, q6asm_cb cb,
+					      void *priv, int stream_id,
+					      int perf_mode)
+{
+	struct q6asm *a = dev_get_drvdata(dev->parent);
+	struct audio_client *ac;
+	unsigned long flags;
+
+	ac = q6asm_get_audio_client(a, stream_id + 1);
+	if (ac) {
+		dev_err(dev, "Audio Client already active\n");
+		return ac;
+	}
+
+	ac = kzalloc(sizeof(*ac), GFP_KERNEL);
+	if (!ac)
+		return ERR_PTR(-ENOMEM);
+
+	spin_lock_irqsave(&a->slock, flags);
+	a->session[stream_id + 1] = ac;
+	spin_unlock_irqrestore(&a->slock, flags);
+	ac->session = stream_id + 1;
+	ac->cb = cb;
+	ac->dev = dev;
+	ac->q6asm = a;
+	ac->priv = priv;
+	ac->io_mode = ASM_SYNC_IO_MODE;
+	ac->perf_mode = perf_mode;
+	/* DSP expects stream id from 1 */
+	ac->stream_id = 1;
+	ac->adev = a->adev;
+	kref_init(&ac->refcount);
+
+	init_waitqueue_head(&ac->cmd_wait);
+	mutex_init(&ac->cmd_lock);
+	spin_lock_init(&ac->lock);
+
+	return ac;
+}
+EXPORT_SYMBOL_GPL(q6asm_audio_client_alloc);
+
+
+static int q6asm_probe(struct apr_device *adev)
+{
+	struct device *dev = &adev->dev;
+	struct device_node *dais_np;
+	struct q6asm *q6asm;
+
+	q6asm = devm_kzalloc(dev, sizeof(*q6asm), GFP_KERNEL);
+	if (!q6asm)
+		return -ENOMEM;
+
+	q6core_get_svc_api_info(adev->svc_id, &q6asm->ainfo);
+
+	q6asm->dev = dev;
+	q6asm->adev = adev;
+	init_waitqueue_head(&q6asm->mem_wait);
+	spin_lock_init(&q6asm->slock);
+	dev_set_drvdata(dev, q6asm);
+
+	dais_np = of_get_child_by_name(dev->of_node, "dais");
+	if (dais_np) {
+		q6asm->pdev_dais = of_platform_device_create(dais_np,
+							   "q6asm-dai", dev);
+		of_node_put(dais_np);
+	}
+
+	return 0;
+}
+
+static int q6asm_remove(struct apr_device *adev)
+{
+	struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
+
+	if (q6asm->pdev_dais)
+		of_platform_device_destroy(&q6asm->pdev_dais->dev, NULL);
+
+	return 0;
+}
+static const struct of_device_id q6asm_device_id[]  = {
+	{ .compatible = "qcom,q6asm" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, q6asm_device_id);
+
+static struct apr_driver qcom_q6asm_driver = {
+	.probe = q6asm_probe,
+	.remove = q6asm_remove,
+	.callback = q6asm_srvc_callback,
+	.driver = {
+		.name = "qcom-q6asm",
+		.of_match_table = of_match_ptr(q6asm_device_id),
+	},
+};
+
+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..b7816e6384e7
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6asm.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __Q6_ASM_H__
+#define __Q6_ASM_H__
+
+#define MAX_SESSIONS	8
+
+typedef void (*q6asm_cb) (uint32_t opcode, uint32_t token,
+			  void *payload, void *priv);
+struct audio_client;
+struct audio_client *q6asm_audio_client_alloc(struct device *dev,
+					      q6asm_cb cb, void *priv,
+					      int session_id, int perf_mode);
+void q6asm_audio_client_free(struct audio_client *ac);
+int q6asm_get_session_id(struct audio_client *ac);
+#endif /* __Q6_ASM_H__ */
-- 
2.17.0

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