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[media] media: davinci: vpif: display: add V4L2-async support

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Add support for asynchronous subdevice probing, using the v4l2-async API.
The legacy synchronous mode is still supported too, which allows to
gradually update drivers and platforms.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Lad, Prabhakar 2013-06-25 11:17:35 -03:00 committed by Mauro Carvalho Chehab
parent 873229e4fd
commit 4b8a531e6b
3 changed files with 132 additions and 83 deletions
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210
drivers/media/platform/davinci/vpif_display.c
View file

@ -1618,6 +1618,102 @@ static int initialize_vpif(void)
return err;
}
static int vpif_async_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
int i;
for (i = 0; i < vpif_obj.config->subdev_count; i++)
if (!strcmp(vpif_obj.config->subdevinfo[i].name,
subdev->name)) {
vpif_obj.sd[i] = subdev;
vpif_obj.sd[i]->grp_id = 1 << i;
return 0;
}
return -EINVAL;
}
static int vpif_probe_complete(void)
{
struct common_obj *common;
struct channel_obj *ch;
int j, err, k;
for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
ch = vpif_obj.dev[j];
/* Initialize field of the channel objects */
atomic_set(&ch->usrs, 0);
for (k = 0; k < VPIF_NUMOBJECTS; k++) {
ch->common[k].numbuffers = 0;
common = &ch->common[k];
common->io_usrs = 0;
common->started = 0;
spin_lock_init(&common->irqlock);
mutex_init(&common->lock);
common->numbuffers = 0;
common->set_addr = NULL;
common->ytop_off = 0;
common->ybtm_off = 0;
common->ctop_off = 0;
common->cbtm_off = 0;
common->cur_frm = NULL;
common->next_frm = NULL;
memset(&common->fmt, 0, sizeof(common->fmt));
common->numbuffers = config_params.numbuffers[k];
}
ch->initialized = 0;
if (vpif_obj.config->subdev_count)
ch->sd = vpif_obj.sd[0];
ch->channel_id = j;
if (j < 2)
ch->common[VPIF_VIDEO_INDEX].numbuffers =
config_params.numbuffers[ch->channel_id];
else
ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
/* Initialize prio member of channel object */
v4l2_prio_init(&ch->prio);
ch->common[VPIF_VIDEO_INDEX].fmt.type =
V4L2_BUF_TYPE_VIDEO_OUTPUT;
ch->video_dev->lock = &common->lock;
video_set_drvdata(ch->video_dev, ch);
/* select output 0 */
err = vpif_set_output(vpif_obj.config, ch, 0);
if (err)
goto probe_out;
/* register video device */
vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
(int)ch, (int)&ch->video_dev);
err = video_register_device(ch->video_dev,
VFL_TYPE_GRABBER, (j ? 3 : 2));
if (err < 0)
goto probe_out;
}
return 0;
probe_out:
for (k = 0; k < j; k++) {
ch = vpif_obj.dev[k];
video_unregister_device(ch->video_dev);
video_device_release(ch->video_dev);
ch->video_dev = NULL;
}
return err;
}
static int vpif_async_complete(struct v4l2_async_notifier *notifier)
{
return vpif_probe_complete();
}
/*
* vpif_probe: This function creates device entries by register itself to the
* V4L2 driver and initializes fields of each channel objects
@ -1625,11 +1721,9 @@ static int initialize_vpif(void)
static __init int vpif_probe(struct platform_device *pdev)
{
struct vpif_subdev_info *subdevdata;
struct vpif_display_config *config;
int i, j = 0, k, err = 0;
int i, j = 0, err = 0;
int res_idx = 0;
struct i2c_adapter *i2c_adap;
struct common_obj *common;
struct channel_obj *ch;
struct video_device *vfd;
struct resource *res;
@ -1708,11 +1802,9 @@ static __init int vpif_probe(struct platform_device *pdev)
size/2;
}
}
i2c_adap = i2c_get_adapter(1);
config = pdev->dev.platform_data;
subdev_count = config->subdev_count;
subdevdata = config->subdevinfo;
vpif_obj.config = pdev->dev.platform_data;
subdev_count = vpif_obj.config->subdev_count;
subdevdata = vpif_obj.config->subdevinfo;
vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
GFP_KERNEL);
if (vpif_obj.sd == NULL) {
@ -1721,86 +1813,40 @@ static __init int vpif_probe(struct platform_device *pdev)
goto vpif_sd_error;
}
for (i = 0; i < subdev_count; i++) {
vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
i2c_adap,
&subdevdata[i].board_info,
NULL);
if (!vpif_obj.sd[i]) {
vpif_err("Error registering v4l2 subdevice\n");
err = -ENODEV;
if (!vpif_obj.config->asd_sizes) {
i2c_adap = i2c_get_adapter(1);
for (i = 0; i < subdev_count; i++) {
vpif_obj.sd[i] =
v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
i2c_adap,
&subdevdata[i].
board_info,
NULL);
if (!vpif_obj.sd[i]) {
vpif_err("Error registering v4l2 subdevice\n");
goto probe_subdev_out;
}
if (vpif_obj.sd[i])
vpif_obj.sd[i]->grp_id = 1 << i;
}
vpif_probe_complete();
} else {
vpif_obj.notifier.subdev = vpif_obj.config->asd;
vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
vpif_obj.notifier.bound = vpif_async_bound;
vpif_obj.notifier.complete = vpif_async_complete;
err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
&vpif_obj.notifier);
if (err) {
vpif_err("Error registering async notifier\n");
err = -EINVAL;
goto probe_subdev_out;
}
if (vpif_obj.sd[i])
vpif_obj.sd[i]->grp_id = 1 << i;
}
for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
ch = vpif_obj.dev[j];
/* Initialize field of the channel objects */
atomic_set(&ch->usrs, 0);
for (k = 0; k < VPIF_NUMOBJECTS; k++) {
ch->common[k].numbuffers = 0;
common = &ch->common[k];
common->io_usrs = 0;
common->started = 0;
spin_lock_init(&common->irqlock);
mutex_init(&common->lock);
common->numbuffers = 0;
common->set_addr = NULL;
common->ytop_off = common->ybtm_off = 0;
common->ctop_off = common->cbtm_off = 0;
common->cur_frm = common->next_frm = NULL;
memset(&common->fmt, 0, sizeof(common->fmt));
common->numbuffers = config_params.numbuffers[k];
}
ch->initialized = 0;
if (subdev_count)
ch->sd = vpif_obj.sd[0];
ch->channel_id = j;
if (j < 2)
ch->common[VPIF_VIDEO_INDEX].numbuffers =
config_params.numbuffers[ch->channel_id];
else
ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
/* Initialize prio member of channel object */
v4l2_prio_init(&ch->prio);
ch->common[VPIF_VIDEO_INDEX].fmt.type =
V4L2_BUF_TYPE_VIDEO_OUTPUT;
ch->video_dev->lock = &common->lock;
video_set_drvdata(ch->video_dev, ch);
/* select output 0 */
err = vpif_set_output(config, ch, 0);
if (err)
goto probe_out;
/* register video device */
vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
(int)ch, (int)&ch->video_dev);
err = video_register_device(ch->video_dev,
VFL_TYPE_GRABBER, (j ? 3 : 2));
if (err < 0)
goto probe_out;
}
v4l2_info(&vpif_obj.v4l2_dev,
" VPIF display driver initialized\n");
return 0;
probe_out:
for (k = 0; k < j; k++) {
ch = vpif_obj.dev[k];
video_unregister_device(ch->video_dev);
video_device_release(ch->video_dev);
ch->video_dev = NULL;
}
probe_subdev_out:
kfree(vpif_obj.sd);
vpif_sd_error:

3
drivers/media/platform/davinci/vpif_display.h
View file

@ -148,7 +148,8 @@ struct vpif_device {
struct v4l2_device v4l2_dev;
struct channel_obj *dev[VPIF_DISPLAY_NUM_CHANNELS];
struct v4l2_subdev **sd;
struct v4l2_async_notifier notifier;
struct vpif_display_config *config;
};
struct vpif_config_params {

2
include/media/davinci/vpif_types.h
View file

@ -59,6 +59,8 @@ struct vpif_display_config {
int subdev_count;
struct vpif_display_chan_config chan_config[VPIF_DISPLAY_MAX_CHANNELS];
const char *card_name;
struct v4l2_async_subdev **asd; /* Flat array, arranged in groups */
int *asd_sizes; /* 0-terminated array of asd group sizes */
};
struct vpif_input {