netdev - [PATCH v3 04/10] ASoC: SOF: ops: Add ops for client registration

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Date:   Thu, 22 Oct 2020 17:33:32 -0700
From:   Dave Ertman <david.m.ertman@...el.com>
To:     alsa-devel@...a-project.org
Cc:     tiwai@...e.de, broonie@...nel.org, linux-rdma@...r.kernel.org,
        jgg@...dia.com, dledford@...hat.com, netdev@...r.kernel.org,
        davem@...emloft.net, kuba@...nel.org, gregkh@...uxfoundation.org,
        ranjani.sridharan@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, fred.oh@...ux.intel.com,
        parav@...lanox.com, shiraz.saleem@...el.com,
        dan.j.williams@...el.com, kiran.patil@...el.com,
        linux-kernel@...r.kernel.org, leonro@...dia.com
Subject: [PATCH v3 04/10] ASoC: SOF: ops: Add ops for client registration

From: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>

Add new ops for registering/unregistering clients based
on DSP capabilities and/or DT information.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Signed-off-by: Dave Ertman <david.m.ertman@...el.com>
---
 sound/soc/sof/core.c     | 10 ++++++++++
 sound/soc/sof/ops.h      | 14 ++++++++++++++
 sound/soc/sof/sof-priv.h |  4 ++++
 3 files changed, 28 insertions(+)

diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c
index 72a97219395f..ddb9a12d5aac 100644
--- a/sound/soc/sof/core.c
+++ b/sound/soc/sof/core.c
@@ -246,8 +246,17 @@ static int sof_probe_continue(struct snd_sof_dev *sdev)
 	if (plat_data->sof_probe_complete)
 		plat_data->sof_probe_complete(sdev->dev);
 
+	/* If registering certain clients fails, unregister the previously registered clients. */
+	ret = snd_sof_register_clients(sdev);
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: failed to register clients %d\n", ret);
+		goto client_reg_err;
+	}
+
 	return 0;
 
+client_reg_err:
+	snd_sof_unregister_clients(sdev);
 fw_trace_err:
 	snd_sof_free_trace(sdev);
 fw_run_err:
@@ -356,6 +365,7 @@ int snd_sof_device_remove(struct device *dev)
 			dev_warn(dev, "error: %d failed to prepare DSP for device removal",
 				 ret);
 
+		snd_sof_unregister_clients(sdev);
 		snd_sof_fw_unload(sdev);
 		snd_sof_ipc_free(sdev);
 		snd_sof_free_debug(sdev);
diff --git a/sound/soc/sof/ops.h b/sound/soc/sof/ops.h
index b21632f5511a..00370f8bcd75 100644
--- a/sound/soc/sof/ops.h
+++ b/sound/soc/sof/ops.h
@@ -470,6 +470,20 @@ snd_sof_set_mach_params(const struct snd_soc_acpi_mach *mach,
 		sof_ops(sdev)->set_mach_params(mach, dev);
 }
 
+static inline int snd_sof_register_clients(struct snd_sof_dev *sdev)
+{
+	if (sof_ops(sdev) && sof_ops(sdev)->register_clients)
+		return sof_ops(sdev)->register_clients(sdev);
+
+	return 0;
+}
+
+static inline void snd_sof_unregister_clients(struct snd_sof_dev *sdev)
+{
+	if (sof_ops(sdev) && sof_ops(sdev)->unregister_clients)
+		sof_ops(sdev)->unregister_clients(sdev);
+}
+
 static inline const struct snd_sof_dsp_ops
 *sof_get_ops(const struct sof_dev_desc *d,
 	     const struct sof_ops_table mach_ops[], int asize)
diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h
index dceac73b858f..cca239c09d0e 100644
--- a/sound/soc/sof/sof-priv.h
+++ b/sound/soc/sof/sof-priv.h
@@ -252,6 +252,10 @@ struct snd_sof_dsp_ops {
 	void (*set_mach_params)(const struct snd_soc_acpi_mach *mach,
 				struct device *dev); /* optional */
 
+	/* client ops */
+	int (*register_clients)(struct snd_sof_dev *sdev); /* optional */
+	void (*unregister_clients)(struct snd_sof_dev *sdev); /* optional */
+
 	/* DAI ops */
 	struct snd_soc_dai_driver *drv;
 	int num_drv;
-- 
2.26.2