ASoC: SOF: Add OF DSP device support

Add support for device tree based SOF DSP devices.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190821164730.7385-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig
index fb01f0c..01acb58 100644 (file)
--- a/sound/soc/sof/Kconfig
+++ b/sound/soc/sof/Kconfig
@@ -36,6 +36,16 @@ config SND_SOC_SOF_ACPI
          Say Y if you need this option
          If unsure select "N".
 
+config SND_SOC_SOF_OF
+       tristate "SOF OF enumeration support"
+       depends on OF || COMPILE_TEST
+       select SND_SOC_SOF
+       select SND_SOC_SOF_OPTIONS
+       help
+         This adds support for Device Tree enumeration. This option is
+         required to enable i.MX8 devices.
+         Say Y if you need this option. If unsure select "N".
+
 config SND_SOC_SOF_OPTIONS
        tristate
        help

diff --git a/sound/soc/sof/Makefile b/sound/soc/sof/Makefile
index 585fb69..772c452 100644 (file)
--- a/sound/soc/sof/Makefile
+++ b/sound/soc/sof/Makefile
@@ -5,6 +5,8 @@ snd-sof-objs := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\
 
 snd-sof-pci-objs := sof-pci-dev.o
 snd-sof-acpi-objs := sof-acpi-dev.o
+snd-sof-of-objs := sof-of-dev.o
+
 snd-sof-nocodec-objs := nocodec.o
 
 obj-$(CONFIG_SND_SOC_SOF) += snd-sof.o
@@ -12,6 +14,7 @@ obj-$(CONFIG_SND_SOC_SOF_NOCODEC) += snd-sof-nocodec.o
 
 
 obj-$(CONFIG_SND_SOC_SOF_ACPI) += snd-sof-acpi.o
+obj-$(CONFIG_SND_SOC_SOF_OF) += snd-sof-of.o
 obj-$(CONFIG_SND_SOC_SOF_PCI) += snd-sof-pci.o
 
 obj-$(CONFIG_SND_SOC_SOF_INTEL_TOPLEVEL) += intel/

diff --git a/sound/soc/sof/sof-of-dev.c b/sound/soc/sof/sof-of-dev.c
new file mode 100644 (file)
index 0000000..28a9692
--- /dev/null
+++ b/sound/soc/sof/sof-of-dev.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// Copyright 2019 NXP
+//
+// Author: Daniel Baluta <daniel.baluta@nxp.com>
+//
+
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <sound/sof.h>
+
+#include "ops.h"
+
+extern struct snd_sof_dsp_ops sof_imx8_ops;
+
+/* platform specific devices */
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8)
+static struct sof_dev_desc sof_of_imx8qxp_desc = {
+       .default_fw_path = "imx/sof",
+       .default_tplg_path = "imx/sof-tplg",
+       .nocodec_fw_filename = "sof-imx8.ri",
+       .nocodec_tplg_filename = "sof-imx8-nocodec.tplg",
+       .ops = &sof_imx8_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,
+                          NULL)
+};
+
+static void sof_of_probe_complete(struct device *dev)
+{
+       /* allow runtime_pm */
+       pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
+       pm_runtime_use_autosuspend(dev);
+       pm_runtime_enable(dev);
+}
+
+static int sof_of_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       const struct sof_dev_desc *desc;
+       /*TODO: create a generic snd_soc_xxx_mach */
+       struct snd_soc_acpi_mach *mach;
+       struct snd_sof_pdata *sof_pdata;
+       const struct snd_sof_dsp_ops *ops;
+       int ret;
+
+       dev_info(&pdev->dev, "DT DSP detected");
+
+       sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
+       if (!sof_pdata)
+               return -ENOMEM;
+
+       desc = device_get_match_data(dev);
+       if (!desc)
+               return -ENODEV;
+
+       /* get ops for platform */
+       ops = desc->ops;
+       if (!ops) {
+               dev_err(dev, "error: no matching DT descriptor ops\n");
+               return -ENODEV;
+       }
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
+       /* force nocodec mode */
+       dev_warn(dev, "Force to use nocodec mode\n");
+       mach = devm_kzalloc(dev, sizeof(*mach), GFP_KERNEL);
+       if (!mach)
+               return -ENOMEM;
+       ret = sof_nocodec_setup(dev, sof_pdata, mach, desc, ops);
+       if (ret < 0)
+               return ret;
+#else
+       /* TODO: implement case where we actually have a codec */
+       return -ENODEV;
+#endif
+
+       if (mach)
+               mach->mach_params.platform = dev_name(dev);
+
+       sof_pdata->machine = mach;
+       sof_pdata->desc = desc;
+       sof_pdata->dev = &pdev->dev;
+       sof_pdata->platform = dev_name(dev);
+
+       /* TODO: read alternate fw and tplg filenames from DT */
+       sof_pdata->fw_filename_prefix = sof_pdata->desc->default_fw_path;
+       sof_pdata->tplg_filename_prefix = sof_pdata->desc->default_tplg_path;
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)
+       /* set callback to enable runtime_pm */
+       sof_pdata->sof_probe_complete = sof_of_probe_complete;
+#endif
+        /* call sof helper for DSP hardware probe */
+       ret = snd_sof_device_probe(dev, sof_pdata);
+       if (ret) {
+               dev_err(dev, "error: failed to probe DSP hardware\n");
+               return ret;
+       }
+
+#if !IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)
+       sof_of_probe_complete(dev);
+#endif
+
+       return ret;
+}
+
+static int sof_of_remove(struct platform_device *pdev)
+{
+       pm_runtime_disable(&pdev->dev);
+
+       /* call sof helper for DSP hardware remove */
+       snd_sof_device_remove(&pdev->dev);
+
+       return 0;
+}
+
+static const struct of_device_id sof_of_ids[] = {
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_IMX8)
+       { .compatible = "fsl,imx8qxp-dsp", .data = &sof_of_imx8qxp_desc},
+#endif
+       { }
+};
+MODULE_DEVICE_TABLE(of, sof_of_ids);
+
+/* DT driver definition */
+static struct platform_driver snd_sof_of_driver = {
+       .probe = sof_of_probe,
+       .remove = sof_of_remove,
+       .driver = {
+               .name = "sof-audio-of",
+               .pm = &sof_of_pm,
+               .of_match_table = sof_of_ids,
+       },
+};
+module_platform_driver(snd_sof_of_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");