Merge series "Add support for SOF on i.MX8M" from Daniel Baluta <daniel.baluta@oss.nxp.com>

Daniel Baluta <daniel.baluta@nxp.com>:

From: Daniel Baluta <daniel.baluta@nxp.com>

This patch series adds support for SOF on i.MX8M family. First board
from this family that has a DSP is i.MX8MP.

First 2 patches are trying to fix some compilation issues, the next two
are adding the imx8m support and the last one adds the devicetree
binding.

Changes since v2:
 - add reviewed by from Rob to DT patch
 - fix ownership for patch 2

Daniel Baluta (3):
  ASoC: SOF: imx: Add i.MX8M HW support
  ASoC: SOF: Add i.MX8MP device descriptor
  dt-bindings: dsp: fsl: Add fsl,imx8mp-dsp entry

Pierre-Louis Bossart (1):
  ASoC: SOF: imx: fix undefined reference issue

YueHaibing (1):
  ASoC: SOF: imx8: Fix randbuild error

 .../devicetree/bindings/dsp/fsl,dsp.yaml      |   2 +
 sound/soc/sof/imx/Kconfig                     |  32 +-
 sound/soc/sof/imx/Makefile                    |   2 +
 sound/soc/sof/imx/imx8m.c                     | 279 ++++++++++++++++++
 sound/soc/sof/sof-of-dev.c                    |  14 +
 5 files changed, 325 insertions(+), 4 deletions(-)
 create mode 100644 sound/soc/sof/imx/imx8m.c

--
2.17.1

4 files changed, 323 insertions, 4 deletions

diff --git a/sound/soc/sof/imx/Kconfig b/sound/soc/sof/imx/Kconfig
index bae4f7bf5f75..0e7964bf4448 100644
--- a/sound/soc/sof/imx/Kconfig
+++ b/sound/soc/sof/imx/Kconfig
@@ -11,17 +11,41 @@ config SND_SOC_SOF_IMX_TOPLEVEL
 
 if SND_SOC_SOF_IMX_TOPLEVEL
 
+config SND_SOC_SOF_IMX_OF
+	def_tristate SND_SOC_SOF_OF
+	select SND_SOC_SOF_IMX8 if SND_SOC_SOF_IMX8_SUPPORT
+	select SND_SOC_SOF_IMX8M if SND_SOC_SOF_IMX8M_SUPPORT
+	help
+	  This option is not user-selectable but automagically handled by
+	  'select' statements at a higher level
+
 config SND_SOC_SOF_IMX8_SUPPORT
 	bool "SOF support for i.MX8"
-	depends on IMX_SCU
-	depends on IMX_DSP
 	help
 	  This adds support for Sound Open Firmware for NXP i.MX8 platforms
 	  Say Y if you have such a device.
 	  If unsure select "N".
 
 config SND_SOC_SOF_IMX8
-	def_tristate SND_SOC_SOF_OF
-	depends on SND_SOC_SOF_IMX8_SUPPORT
+	tristate
+	depends on IMX_SCU
+	select IMX_DSP
+	help
+	  This option is not user-selectable but automagically handled by
+	  'select' statements at a higher level
+
+config SND_SOC_SOF_IMX8M_SUPPORT
+	bool "SOF support for i.MX8M"
+	help
+	  This adds support for Sound Open Firmware for NXP i.MX8M platforms
+	  Say Y if you have such a device.
+	  If unsure select "N".
+
+config SND_SOC_SOF_IMX8M
+	tristate
+	depends on IMX_DSP
+	help
+	  This option is not user-selectable but automagically handled by
+	  'select' statements at a higher level
 
 endif ## SND_SOC_SOF_IMX_IMX_TOPLEVEL
diff --git a/sound/soc/sof/imx/Makefile b/sound/soc/sof/imx/Makefile
index 6ef908e8c807..d9d8dc1765b8 100644
--- a/sound/soc/sof/imx/Makefile
+++ b/sound/soc/sof/imx/Makefile
@@ -1,4 +1,6 @@
 # SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 snd-sof-imx8-objs := imx8.o
+snd-sof-imx8m-objs := imx8m.o
 
 obj-$(CONFIG_SND_SOC_SOF_IMX8) += snd-sof-imx8.o
+obj-$(CONFIG_SND_SOC_SOF_IMX8M) += snd-sof-imx8m.o
diff --git a/sound/soc/sof/imx/imx8m.c b/sound/soc/sof/imx/imx8m.c
new file mode 100644
index 000000000000..07451ba4efae
--- /dev/null
+++ b/sound/soc/sof/imx/imx8m.c
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// Copyright 2020 NXP
+//
+// Author: Daniel Baluta <daniel.baluta@nxp.com>
+//
+// Hardware interface for audio DSP on i.MX8M
+
+#include <linux/firmware.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <linux/module.h>
+#include <sound/sof.h>
+#include <sound/sof/xtensa.h>
+#include <linux/firmware/imx/dsp.h>
+
+#include "../ops.h"
+
+#define MBOX_OFFSET	0x800000
+#define MBOX_SIZE	0x1000
+
+struct imx8m_priv {
+	struct device *dev;
+	struct snd_sof_dev *sdev;
+
+	/* DSP IPC handler */
+	struct imx_dsp_ipc *dsp_ipc;
+	struct platform_device *ipc_dev;
+};
+
+static void imx8m_get_reply(struct snd_sof_dev *sdev)
+{
+	struct snd_sof_ipc_msg *msg = sdev->msg;
+	struct sof_ipc_reply reply;
+	int ret = 0;
+
+	if (!msg) {
+		dev_warn(sdev->dev, "unexpected ipc interrupt\n");
+		return;
+	}
+
+	/* get reply */
+	sof_mailbox_read(sdev, sdev->host_box.offset, &reply, sizeof(reply));
+
+	if (reply.error < 0) {
+		memcpy(msg->reply_data, &reply, sizeof(reply));
+		ret = reply.error;
+	} else {
+		/* reply has correct size? */
+		if (reply.hdr.size != msg->reply_size) {
+			dev_err(sdev->dev, "error: reply expected %zu got %u bytes\n",
+				msg->reply_size, reply.hdr.size);
+			ret = -EINVAL;
+		}
+
+		/* read the message */
+		if (msg->reply_size > 0)
+			sof_mailbox_read(sdev, sdev->host_box.offset,
+					 msg->reply_data, msg->reply_size);
+	}
+
+	msg->reply_error = ret;
+}
+
+static int imx8m_get_mailbox_offset(struct snd_sof_dev *sdev)
+{
+	return MBOX_OFFSET;
+}
+
+static int imx8m_get_window_offset(struct snd_sof_dev *sdev, u32 id)
+{
+	return MBOX_OFFSET;
+}
+
+static void imx8m_dsp_handle_reply(struct imx_dsp_ipc *ipc)
+{
+	struct imx8m_priv *priv = imx_dsp_get_data(ipc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
+	imx8m_get_reply(priv->sdev);
+	snd_sof_ipc_reply(priv->sdev, 0);
+	spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags);
+}
+
+static void imx8m_dsp_handle_request(struct imx_dsp_ipc *ipc)
+{
+	struct imx8m_priv *priv = imx_dsp_get_data(ipc);
+
+	snd_sof_ipc_msgs_rx(priv->sdev);
+}
+
+struct imx_dsp_ops imx8m_dsp_ops = {
+	.handle_reply		= imx8m_dsp_handle_reply,
+	.handle_request		= imx8m_dsp_handle_request,
+};
+
+static int imx8m_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
+{
+	struct imx8m_priv *priv = (struct imx8m_priv *)sdev->private;
+
+	sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
+			  msg->msg_size);
+	imx_dsp_ring_doorbell(priv->dsp_ipc, 0);
+
+	return 0;
+}
+
+/*
+ * DSP control.
+ */
+static int imx8m_run(struct snd_sof_dev *sdev)
+{
+	/* TODO: start DSP using Audio MIX bits */
+	return 0;
+}
+
+static int imx8m_probe(struct snd_sof_dev *sdev)
+{
+	struct platform_device *pdev =
+		container_of(sdev->dev, struct platform_device, dev);
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *res_node;
+	struct resource *mmio;
+	struct imx8m_priv *priv;
+	struct resource res;
+	u32 base, size;
+	int ret = 0;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	sdev->private = priv;
+	priv->dev = sdev->dev;
+	priv->sdev = sdev;
+
+	priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
+						      PLATFORM_DEVID_NONE,
+						      pdev, sizeof(*pdev));
+	if (IS_ERR(priv->ipc_dev))
+		return PTR_ERR(priv->ipc_dev);
+
+	priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
+	if (!priv->dsp_ipc) {
+		/* DSP IPC driver not probed yet, try later */
+		ret = -EPROBE_DEFER;
+		dev_err(sdev->dev, "Failed to get drvdata\n");
+		goto exit_pdev_unregister;
+	}
+
+	imx_dsp_set_data(priv->dsp_ipc, priv);
+	priv->dsp_ipc->ops = &imx8m_dsp_ops;
+
+	/* DSP base */
+	mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (mmio) {
+		base = mmio->start;
+		size = resource_size(mmio);
+	} else {
+		dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n");
+		ret = -EINVAL;
+		goto exit_pdev_unregister;
+	}
+
+	sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size);
+	if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) {
+		dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n",
+			base, size);
+		ret = -ENODEV;
+		goto exit_pdev_unregister;
+	}
+	sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM;
+
+	res_node = of_parse_phandle(np, "memory-region", 0);
+	if (!res_node) {
+		dev_err(&pdev->dev, "failed to get memory region node\n");
+		ret = -ENODEV;
+		goto exit_pdev_unregister;
+	}
+
+	ret = of_address_to_resource(res_node, 0, &res);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get reserved region address\n");
+		goto exit_pdev_unregister;
+	}
+
+	sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
+							  res.end - res.start +
+							  1);
+	if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
+		dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
+			base, size);
+		ret = -ENOMEM;
+		goto exit_pdev_unregister;
+	}
+	sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;
+
+	/* set default mailbox offset for FW ready message */
+	sdev->dsp_box.offset = MBOX_OFFSET;
+
+	return 0;
+
+exit_pdev_unregister:
+	platform_device_unregister(priv->ipc_dev);
+	return ret;
+}
+
+static int imx8m_remove(struct snd_sof_dev *sdev)
+{
+	struct imx8m_priv *priv = (struct imx8m_priv *)sdev->private;
+
+	platform_device_unregister(priv->ipc_dev);
+
+	return 0;
+}
+
+/* on i.MX8 there is 1 to 1 match between type and BAR idx */
+static int imx8m_get_bar_index(struct snd_sof_dev *sdev, u32 type)
+{
+	return type;
+}
+
+static void imx8m_ipc_msg_data(struct snd_sof_dev *sdev,
+			       struct snd_pcm_substream *substream,
+			       void *p, size_t sz)
+{
+	sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
+}
+
+static int imx8m_ipc_pcm_params(struct snd_sof_dev *sdev,
+				struct snd_pcm_substream *substream,
+				const struct sof_ipc_pcm_params_reply *reply)
+{
+	return 0;
+}
+
+static struct snd_soc_dai_driver imx8m_dai[] = {
+{
+	.name = "sai-port",
+},
+};
+
+/* i.MX8 ops */
+struct snd_sof_dsp_ops sof_imx8m_ops = {
+	/* probe and remove */
+	.probe		= imx8m_probe,
+	.remove		= imx8m_remove,
+	/* DSP core boot */
+	.run		= imx8m_run,
+
+	/* Block IO */
+	.block_read	= sof_block_read,
+	.block_write	= sof_block_write,
+
+	/* ipc */
+	.send_msg	= imx8m_send_msg,
+	.fw_ready	= sof_fw_ready,
+	.get_mailbox_offset	= imx8m_get_mailbox_offset,
+	.get_window_offset	= imx8m_get_window_offset,
+
+	.ipc_msg_data	= imx8m_ipc_msg_data,
+	.ipc_pcm_params	= imx8m_ipc_pcm_params,
+
+	/* module loading */
+	.load_module	= snd_sof_parse_module_memcpy,
+	.get_bar_index	= imx8m_get_bar_index,
+	/* firmware loading */
+	.load_firmware	= snd_sof_load_firmware_memcpy,
+
+	/* DAI drivers */
+	.drv = imx8m_dai,
+	.num_drv = 1, /* we have only 1 SAI interface on i.MX8M */
+};
+EXPORT_SYMBOL(sof_imx8m_ops);
+
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/sound/soc/sof/sof-of-dev.c b/sound/soc/sof/sof-of-dev.c
index 16e49f2ee629..c6167597d6fe 100644
--- a/sound/soc/sof/sof-of-dev.c
+++ b/sound/soc/sof/sof-of-dev.c
@@ -14,6 +14,7 @@
 
 extern struct snd_sof_dsp_ops sof_imx8_ops;
 extern struct snd_sof_dsp_ops sof_imx8x_ops;
+extern struct snd_sof_dsp_ops sof_imx8m_ops;
 
 /* platform specific devices */
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8)
@@ -34,6 +35,16 @@ static struct sof_dev_desc sof_of_imx8qm_desc = {
 };
 #endif
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8M)
+static struct sof_dev_desc sof_of_imx8mp_desc = {
+	.default_fw_path = "imx/sof",
+	.default_tplg_path = "imx/sof-tplg",
+	.default_fw_filename = "sof-imx8m.ri",
+	.nocodec_tplg_filename = "sof-imx8-nocodec.tplg",
+	.ops = &sof_imx8m_ops,
+};
+#endif
+
 static const struct dev_pm_ops sof_of_pm = {
 	SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
 	SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
@@ -114,6 +125,9 @@ static const struct of_device_id sof_of_ids[] = {
 	{ .compatible = "fsl,imx8qxp-dsp", .data = &sof_of_imx8qxp_desc},
 	{ .compatible = "fsl,imx8qm-dsp", .data = &sof_of_imx8qm_desc},
 #endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8M)
+	{ .compatible = "fsl,imx8mp-dsp", .data = &sof_of_imx8mp_desc},
+#endif
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sof_of_ids);