[v11,4/5] staging: bcm2835-audio: Register bcm2835-audio with vchiq_bus_type
Commit Message
Similar to how bcm2385-camera device is registered, register the
bcm2835-audio with vchiq_bus_type as well.
Since we moved away bcm2835-audio from platform driver/device,
we have to set the DMA mask explicitly. Set the DMA mask at probe
time.
Meanwhile at it, change the name and module alias from "bcm2835_audio"
to "bcm2835-audio" to be consistent with bcm2835-camera device. This
does not brings any functional change as '-' and '_' are
interchangeable as per modprobe man pages.
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
---
.../vc04_services/bcm2835-audio/bcm2835.c | 29 ++++++++++++-------
.../interface/vchiq_arm/vchiq_arm.c | 6 ++--
2 files changed, 22 insertions(+), 13 deletions(-)
@@ -1,12 +1,13 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright 2011 Broadcom Corporation. All rights reserved. */
-#include <linux/platform_device.h>
-
+#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include "../interface/vchiq_arm/vchiq_arm.h"
+#include "../interface/vchiq_arm/vchiq_device.h"
#include "bcm2835.h"
static bool enable_hdmi;
@@ -268,11 +269,19 @@ static int snd_add_child_devices(struct device *device, u32 numchans)
return 0;
}
-static int snd_bcm2835_alsa_probe(struct platform_device *pdev)
+static int snd_bcm2835_alsa_probe(struct vchiq_device *device)
{
- struct device *dev = &pdev->dev;
+ struct device *dev = &device->dev;
int err;
+ if (!dev->dma_mask)
+ dev->dma_mask = &dev->coherent_dma_mask;
+ err = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ if (err) {
+ dev_err(dev, "can't set coherent DMA mask: %d\n", err);
+ return err;
+ }
+
if (num_channels <= 0 || num_channels > MAX_SUBSTREAMS) {
num_channels = MAX_SUBSTREAMS;
dev_warn(dev, "Illegal num_channels value, will use %u\n",
@@ -292,32 +301,32 @@ static int snd_bcm2835_alsa_probe(struct platform_device *pdev)
#ifdef CONFIG_PM
-static int snd_bcm2835_alsa_suspend(struct platform_device *pdev,
+static int snd_bcm2835_alsa_suspend(struct vchiq_device *device,
pm_message_t state)
{
return 0;
}
-static int snd_bcm2835_alsa_resume(struct platform_device *pdev)
+static int snd_bcm2835_alsa_resume(struct vchiq_device *device)
{
return 0;
}
#endif
-static struct platform_driver bcm2835_alsa_driver = {
+static struct vchiq_driver bcm2835_alsa_driver = {
.probe = snd_bcm2835_alsa_probe,
#ifdef CONFIG_PM
.suspend = snd_bcm2835_alsa_suspend,
.resume = snd_bcm2835_alsa_resume,
#endif
.driver = {
- .name = "bcm2835_audio",
+ .name = "bcm2835-audio",
},
};
-module_platform_driver(bcm2835_alsa_driver);
+module_vchiq_driver(bcm2835_alsa_driver);
MODULE_AUTHOR("Dom Cobley");
MODULE_DESCRIPTION("Alsa driver for BCM2835 chip");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:bcm2835_audio");
+MODULE_ALIAS("bcm2835-audio");
@@ -67,12 +67,12 @@ int vchiq_susp_log_level = VCHIQ_LOG_ERROR;
DEFINE_SPINLOCK(msg_queue_spinlock);
struct vchiq_state g_state;
-static struct platform_device *bcm2835_audio;
/*
* The devices implemented in the VCHIQ firmware are not discoverable,
* so we need to maintain a list of them in order to register them with
* the interface.
*/
+static struct vchiq_device *bcm2835_audio;
static struct vchiq_device *bcm2835_camera;
struct vchiq_drvdata {
@@ -1845,7 +1845,7 @@ static int vchiq_probe(struct platform_device *pdev)
goto error_exit;
}
- bcm2835_audio = vchiq_register_child(pdev, "bcm2835_audio");
+ bcm2835_audio = vchiq_device_register(&pdev->dev, "bcm2835-audio");
bcm2835_camera = vchiq_device_register(&pdev->dev, "bcm2835-camera");
return 0;
@@ -1858,7 +1858,7 @@ static int vchiq_probe(struct platform_device *pdev)
static void vchiq_remove(struct platform_device *pdev)
{
- platform_device_unregister(bcm2835_audio);
+ vchiq_device_unregister(bcm2835_audio);
vchiq_device_unregister(bcm2835_camera);
vchiq_debugfs_deinit();
vchiq_deregister_chrdev();