Change au0828 to use Managed Media Controller API to coordinate
creating/deleting media device on parent usb device it shares
with the snd-usb-audio driver. With this change, au0828 uses
media_device_get_devres() to allocate a new media device devres
or return an existing one, if it finds one.
au0828 registers entity_notify hook to create media graph for
the device. It creates necessary links from video, vbi, and
ALSA entities to decoder and links tuner and decoder entities.
Implements enable_source hanlder for other drivers to use to
check for tuner connected to the decoder and activate the link
if tuner is free. In addition, au0828-video will populate decoder
field struct video_device for v4l-core to use it when it invokes
enable_source hanlder. au0828 is changed to use enable_source
hanlder to check for tuner availability from vidioc_g_tuner(),
au0828_v4l2_close(), and queue_setup() prior to changing tuner
settings. If tuner isn't free, return busy condition.
Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
---
drivers/media/usb/au0828/au0828-core.c | 184 +++++++++++++++++++++++---------
drivers/media/usb/au0828/au0828-video.c | 72 ++++---------
drivers/media/usb/au0828/au0828.h | 5 +
3 files changed, 155 insertions(+), 106 deletions(-)
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
index 0378a2c..ffdde58 100644
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -20,6 +20,7 @@
*/
#include "au0828.h"
+#include "au8522.h"
#include <linux/module.h>
#include <linux/slab.h>
@@ -129,12 +130,13 @@ static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
static void au0828_unregister_media_device(struct au0828_dev *dev)
{
-
#ifdef CONFIG_MEDIA_CONTROLLER
- if (dev->media_dev) {
- media_device_unregister(dev->media_dev);
- kfree(dev->media_dev);
- dev->media_dev = NULL;
+ if (dev->media_dev &&
+ media_devnode_is_registered(&dev->media_dev->devnode)) {
+ media_device_unregister_entity_notify(dev->media_dev,
+ &dev->entity_notify);
+ media_device_unregister(dev->media_dev);
+ dev->media_dev = NULL;
}
#endif
}
@@ -196,53 +198,23 @@ static void au0828_usb_disconnect(struct usb_interface *interface)
au0828_usb_release(dev);
}
-static void au0828_media_device_register(struct au0828_dev *dev,
- struct usb_device *udev)
-{
-#ifdef CONFIG_MEDIA_CONTROLLER
- struct media_device *mdev;
- int ret;
-
- mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
- if (!mdev)
- return;
-
- mdev->dev = &udev->dev;
-
- if (!dev->board.name)
- strlcpy(mdev->model, "unknown au0828", sizeof(mdev->model));
- else
- strlcpy(mdev->model, dev->board.name, sizeof(mdev->model));
- if (udev->serial)
- strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
- strcpy(mdev->bus_info, udev->devpath);
- mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
- mdev->driver_version = LINUX_VERSION_CODE;
-
- ret = media_device_register(mdev);
- if (ret) {
- pr_err(
- "Couldn't create a media device. Error: %d\n",
- ret);
- kfree(mdev);
- return;
- }
-
- dev->media_dev = mdev;
-#endif
-}
-
-
-static void au0828_create_media_graph(struct au0828_dev *dev)
+void au0828_create_media_graph(struct media_entity *new, void *notify_data)
{
#ifdef CONFIG_MEDIA_CONTROLLER
+ struct au0828_dev *dev = (struct au0828_dev *) notify_data;
struct media_device *mdev = dev->media_dev;
struct media_entity *entity;
struct media_entity *tuner = NULL, *decoder = NULL;
+ struct media_entity *alsa_capture = NULL;
+ int ret = 0;
if (!mdev)
return;
+ if (dev->tuner_linked && dev->vdev_linked && dev->vbi_linked &&
+ dev->alsa_capture_linked)
+ return;
+
media_device_for_each_entity(entity, mdev) {
switch (entity->type) {
case MEDIA_ENT_T_V4L2_SUBDEV_TUNER:
@@ -251,6 +223,9 @@ static void au0828_create_media_graph(struct au0828_dev *dev)
case MEDIA_ENT_T_V4L2_SUBDEV_DECODER:
decoder = entity;
break;
+ case MEDIA_ENT_T_DEVNODE_ALSA_CAPTURE:
+ alsa_capture = entity;
+ break;
}
}
@@ -259,15 +234,120 @@ static void au0828_create_media_graph(struct au0828_dev *dev)
if (!decoder)
return;
- if (tuner)
- media_entity_create_link(tuner, 0, decoder, 0,
+ if (tuner && !dev->tuner_linked) {
+ ret = media_entity_create_link(tuner, 0, decoder, 0,
MEDIA_LNK_FL_ENABLED);
- if (dev->vdev.entity.links)
- media_entity_create_link(decoder, 1, &dev->vdev.entity, 0,
- MEDIA_LNK_FL_ENABLED);
- if (dev->vbi_dev.entity.links)
- media_entity_create_link(decoder, 2, &dev->vbi_dev.entity, 0,
- MEDIA_LNK_FL_ENABLED);
+ if (ret == 0)
+ dev->tuner_linked = 1;
+ }
+ if (dev->vdev.entity.links && !dev->vdev_linked) {
+ ret = media_entity_create_link(decoder, AU8522_PAD_VID_OUT,
+ &dev->vdev.entity, 0, MEDIA_LNK_FL_ENABLED);
+ if (ret == 0)
+ dev->vdev_linked = 1;
+ }
+ if (dev->vbi_dev.entity.links && !dev->vbi_linked) {
+ ret = media_entity_create_link(decoder, AU8522_PAD_VBI_OUT,
+ &dev->vbi_dev.entity, 0, MEDIA_LNK_FL_ENABLED);
+ if (ret == 0)
+ dev->vbi_linked = 1;
+ }
+ if (alsa_capture && !dev->alsa_capture_linked) {
+ ret = media_entity_create_link(decoder, AU8522_PAD_AUDIO_OUT,
+ alsa_capture, 0,
+ MEDIA_LNK_FL_ENABLED);
+ if (ret == 0)
+ dev->alsa_capture_linked = 1;
+ }
+#endif
+}
+
+int au0828_enable_source(struct media_entity *enable_sink)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER
+ struct media_entity *source;
+ struct media_link *link, *found_link = NULL;
+ int i, ret, active_links = 0, n_links = 0;
+
+ for (i = 0; i < enable_sink->num_links; i++) {
+ link = &enable_sink->links[i];
+ if (link->sink->entity == enable_sink) {
+ found_link = link;
+ n_links++;
+ if (link->flags & MEDIA_LNK_FL_ENABLED)
+ active_links++;
+ break;
+ }
+ }
+
+ if (!n_links || active_links == 1 || !found_link)
+ return 0;
+
+ source = found_link->source->entity;
+ for (i = 0; i < source->num_links; i++) {
+ struct media_entity *sink;
+ int flags = 0;
+
+ link = &source->links[i];
+ sink = link->sink->entity;
+
+ if (sink == enable_sink)
+ flags = MEDIA_LNK_FL_ENABLED;
+
+ ret = media_entity_setup_link(link, flags);
+ if (ret) {
+ pr_err(
+ "Change tuner link %s->%s to %s. Error %d\n",
+ source->name, sink->name,
+ flags ? "enabled" : "disabled",
+ ret);
+ return ret;
+ }
+ }
+ return 0;
+#endif
+ return 0;
+}
+
+static void au0828_media_device_register(struct au0828_dev *dev,
+ struct usb_device *udev)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER
+ struct media_device *mdev;
+ int ret;
+
+ mdev = media_device_get_devres(&udev->dev);
+ if (!mdev)
+ return;
+
+ if (!media_devnode_is_registered(&mdev->devnode)) {
+ /* register media device */
+ mdev->dev = &udev->dev;
+ if (udev->product)
+ strlcpy(mdev->model, udev->product,
+ sizeof(mdev->model));
+ if (udev->serial)
+ strlcpy(mdev->serial, udev->serial,
+ sizeof(mdev->serial));
+ strcpy(mdev->bus_info, udev->devpath);
+ mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
+ mdev->enable_source = au0828_enable_source;
+ ret = media_device_register(mdev);
+ if (ret) {
+ dev_err(&udev->dev,
+ "Couldn't create a media device. Error: %d\n",
+ ret);
+ return;
+ }
+ /* register entity_notify callback */
+ dev->entity_notify.notify_data = (void *) dev;
+ dev->entity_notify.notify = au0828_create_media_graph;
+ media_device_register_entity_notify(mdev, &dev->entity_notify);
+ }
+ /* If ALSA registered the media device - set enable_source */
+ if (!mdev->enable_source)
+ mdev->enable_source = au0828_enable_source;
+ dev->media_dev = mdev;
#endif
}
@@ -383,8 +463,6 @@ static int au0828_usb_probe(struct usb_interface *interface,
mutex_unlock(&dev->lock);
- au0828_create_media_graph(dev);
-
return retval;
}
diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
index 939b2ad..de3140e 100644
--- a/drivers/media/usb/au0828/au0828-video.c
+++ b/drivers/media/usb/au0828/au0828-video.c
@@ -641,58 +641,10 @@ static int au0828_enable_analog_tuner(struct au0828_dev *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
struct media_device *mdev = dev->media_dev;
- struct media_entity *entity, *source;
- struct media_link *link, *found_link = NULL;
- int i, ret, active_links = 0;
- if (!mdev || !dev->decoder)
+ if (!mdev || !dev->decoder || !mdev->enable_source)
return 0;
-
- /*
- * This will find the tuner that is connected into the decoder.
- * Technically, this is not 100% correct, as the device may be
- * using an analog input instead of the tuner. However, as we can't
- * do DVB streaming while the DMA engine is being used for V4L2,
- * this should be enough for the actual needs.
- */
- for (i = 0; i < dev->decoder->num_links; i++) {
- link = &dev->decoder->links[i];
- if (link->sink->entity == dev->decoder) {
- found_link = link;
- if (link->flags & MEDIA_LNK_FL_ENABLED)
- active_links++;
- break;
- }
- }
-
- if (active_links == 1 || !found_link)
- return 0;
-
- source = found_link->source->entity;
- for (i = 0; i < source->num_links; i++) {
- struct media_entity *sink;
- int flags = 0;
-
- link = &source->links[i];
- sink = link->sink->entity;
-
- if (sink == entity)
- flags = MEDIA_LNK_FL_ENABLED;
-
- ret = media_entity_setup_link(link, flags);
- if (ret) {
- pr_err(
- "Couldn't change link %s->%s to %s. Error %d\n",
- source->name, sink->name,
- flags ? "enabled" : "disabled",
- ret);
- return ret;
- } else
- au0828_isocdbg(
- "link %s->%s was %s\n",
- source->name, sink->name,
- flags ? "ENABLED" : "disabled");
- }
+ return mdev->enable_source(dev->decoder);
#endif
return 0;
}
@@ -704,6 +656,7 @@ static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
struct au0828_dev *dev = vb2_get_drv_priv(vq);
unsigned long img_size = dev->height * dev->bytesperline;
unsigned long size;
+ int ret;
size = fmt ? fmt->fmt.pix.sizeimage : img_size;
if (size < img_size)
@@ -712,7 +665,9 @@ static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
*nplanes = 1;
sizes[0] = size;
- au0828_enable_analog_tuner(dev);
+ ret = au0828_enable_analog_tuner(dev);
+ if (ret)
+ return ret;
return 0;
}
@@ -1067,8 +1022,12 @@ static int au0828_v4l2_close(struct file *filp)
goto end;
if (dev->users == 1) {
- /* Save some power by putting tuner to sleep */
- v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
+ /* Save some power by putting tuner to sleep, if it is free */
+ /* What happens when radio is using tuner?? */
+ ret = au0828_enable_analog_tuner(dev);
+ if (ret == 0)
+ v4l2_device_call_all(&dev->v4l2_dev, 0, core,
+ s_power, 0);
dev->std_set_in_tuner_core = 0;
/* When close the device, set the usb intf0 into alt0 to free
@@ -1469,10 +1428,15 @@ static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio
static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
struct au0828_dev *dev = video_drvdata(file);
+ int ret;
if (t->index != 0)
return -EINVAL;
+ ret = au0828_enable_analog_tuner(dev);
+ if (ret)
+ return ret;
+
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
@@ -1884,11 +1848,13 @@ int au0828_analog_register(struct au0828_dev *dev,
strcpy(dev->vbi_dev.name, "au0828a vbi");
#if defined(CONFIG_MEDIA_CONTROLLER)
+ dev->vdev.decoder = dev->decoder;
dev->video_pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_init(&dev->vdev.entity, 1, &dev->video_pad, 0);
if (ret < 0)
pr_err("failed to initialize video media entity!\n");
+ dev->vbi_dev.decoder = dev->decoder;
dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad, 0);
if (ret < 0)
diff --git a/drivers/media/usb/au0828/au0828.h b/drivers/media/usb/au0828/au0828.h
index d3644b3..a59ba08 100644
--- a/drivers/media/usb/au0828/au0828.h
+++ b/drivers/media/usb/au0828/au0828.h
@@ -281,6 +281,11 @@ struct au0828_dev {
struct media_device *media_dev;
struct media_pad video_pad, vbi_pad;
struct media_entity *decoder;
+ struct media_entity_notify entity_notify;
+ bool tuner_linked;
+ bool vdev_linked;
+ bool vbi_linked;
+ bool alsa_capture_linked;
#endif
};
--
2.1.4
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