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Date: Mon, 22 Apr 2013 15:47:28 +0530
From: Prabhakar Lad <prabhakar.csengg@...il.com>
To: LMML <linux-media@...r.kernel.org>
Cc: DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
LKML <linux-kernel@...r.kernel.org>,
"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
Guennadi Liakhovetski <g.liakhovetski@....de>,
Hans Verkuil <hans.verkuil@...co.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Sakari Ailus <sakari.ailus@....fi>,
Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: [PATCH RFC v2 4/4] media: davinci: vpif: display: add V4L2-async support
From: Lad, Prabhakar <prabhakar.csengg@...il.com>
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@...il.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
Cc: Hans Verkuil <hans.verkuil@...co.com>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Sakari Ailus <sakari.ailus@....fi>
Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
---
drivers/media/platform/davinci/vpif_display.c | 219 +++++++++++++++----------
drivers/media/platform/davinci/vpif_display.h | 3 +-
include/media/davinci/vpif_types.h | 2 +
3 files changed, 136 insertions(+), 88 deletions(-)
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 7b17368..4f53730 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -19,6 +19,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <media/v4l2-async.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ioctl.h>
@@ -1684,6 +1685,105 @@ vpif_init_free_channel_objects:
return err;
}
+static int vpif_async_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_async_subdev_list *asdl)
+{
+ struct v4l2_subdev *subdev = v4l2_async_to_subdev(asdl);
+ int i = 0;
+
+ 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;
+ }
+
+ 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;
+ }
+ 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
@@ -1691,11 +1791,9 @@ vpif_init_free_channel_objects:
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;
@@ -1704,18 +1802,15 @@ static __init int vpif_probe(struct platform_device *pdev)
vpif_dev = &pdev->dev;
err = initialize_vpif();
-
if (err) {
v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
return err;
}
-
err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
if (err) {
v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
return err;
}
-
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
for (i = res->start; i <= res->end; i++) {
if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
@@ -1731,7 +1826,6 @@ static __init int vpif_probe(struct platform_device *pdev)
}
res_idx++;
}
-
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
@@ -1759,7 +1853,6 @@ static __init int vpif_probe(struct platform_device *pdev)
/* Set video_dev to the video device */
ch->video_dev = vfd;
}
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res) {
size = resource_size(res);
@@ -1777,11 +1870,9 @@ 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) {
@@ -1790,85 +1881,39 @@ 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");
- 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];
+ 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.subdev_num = 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;
}
- 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:
diff --git a/drivers/media/platform/davinci/vpif_display.h b/drivers/media/platform/davinci/vpif_display.h
index 5d87fc8..4d0485b 100644
--- a/drivers/media/platform/davinci/vpif_display.h
+++ b/drivers/media/platform/davinci/vpif_display.h
@@ -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 {
diff --git a/include/media/davinci/vpif_types.h b/include/media/davinci/vpif_types.h
index e08bcde..3cb1704 100644
--- a/include/media/davinci/vpif_types.h
+++ b/include/media/davinci/vpif_types.h
@@ -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 {
--
1.7.4.1
--
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