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Message-ID: <20160429140649.GE21251@amd>
Date: Fri, 29 Apr 2016 16:06:49 +0200
From: Pavel Machek <pavel@....cz>
To: Sakari Ailus <sakari.ailus@....fi>
Cc: Hans Verkuil <hverkuil@...all.nl>, pali.rohar@...il.com,
sre@...nel.org, kernel list <linux-kernel@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
patrikbachan@...il.com, serge@...lyn.com, tuukkat76@...il.com,
mchehab@....samsung.com, linux-media@...r.kernel.org
Subject: Re: v4l subdevs without big device was Re:
drivers/media/i2c/adp1653.c: does not show as /dev/video* or v4l-subdev*
Hi!
> > > This seems to be mostly in line with what has been discussed in the meeting,
> > > except that the patches add a device specific property. Please ignore the
> > > led patches in that tree for now (i.e. four patches on the top are the
> > > relevant ones here).
> > >
> >
> > I'm currently trying to apply them to v4.6, but am getting rather ugly
> > rejects :-(.
>
> :-\
>
> There have been patches applied to the omap3isp driver since that I suppose.
> These aren't overly complex, feel free to take the patches if they're still
> useful.
Ok, I got it to work. I can split it back, if needed. I've got patches
on camera-fm3 branch. And yes, that gets flash to work.
(I don't know how to turn flash into torch, which is what I really
wanted, but I guess I'll figure it out.)
Pavel
diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
index 640d409..a6b9fac 100644
--- a/arch/arm/boot/dts/omap3-n900.dts
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -239,6 +239,7 @@
pinctrl-names = "default";
pinctrl-0 = <&camera_pins>;
+ ti,camera-flashes = <&adp1653 &cam1>;
ports {
port@1 {
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index 6361fde..23d484c 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -2095,13 +2095,20 @@ static void isp_of_parse_node_csi2(struct device *dev,
buscfg->bus.csi2.crc = 1;
}
-static int isp_of_parse_node(struct device *dev, struct device_node *node,
- struct isp_async_subdev *isd)
+static int isp_of_parse_node_endpoint(struct device *dev,
+ struct device_node *node,
+ struct isp_async_subdev *isd)
{
- struct isp_bus_cfg *buscfg = &isd->bus;
+ struct isp_bus_cfg *buscfg;
struct v4l2_of_endpoint vep;
int ret;
+ isd->bus = devm_kzalloc(dev, sizeof(*isd->bus), GFP_KERNEL);
+ if (!isd->bus)
+ return -ENOMEM;
+
+ buscfg = isd->bus;
+
ret = v4l2_of_parse_endpoint(node, &vep);
if (ret)
return ret;
@@ -2144,10 +2151,51 @@ static int isp_of_parse_node(struct device *dev, struct device_node *node,
return 0;
}
+static int isp_of_parse_node(struct device *dev, struct device_node *node,
+ struct v4l2_async_notifier *notifier,
+ u32 group_id, bool link)
+{
+ struct isp_async_subdev *isd;
+
+ isd = devm_kzalloc(dev, sizeof(*isd), GFP_KERNEL);
+ if (!isd) {
+ of_node_put(node);
+ return -ENOMEM;
+ }
+
+ notifier->subdevs[notifier->num_subdevs] = &isd->asd;
+
+ if (link) {
+ if (isp_of_parse_node_endpoint(dev, node, isd)) {
+ of_node_put(node);
+ return -EINVAL;
+ }
+
+ isd->asd.match.of.node = of_graph_get_remote_port_parent(node);
+ of_node_put(node);
+ } else {
+ isd->asd.match.of.node = node;
+ }
+
+ if (!isd->asd.match.of.node) {
+ dev_warn(dev, "bad remote port parent\n");
+ return -EINVAL;
+ }
+
+ isd->asd.match_type = V4L2_ASYNC_MATCH_OF;
+ isd->group_id = group_id;
+ notifier->num_subdevs++;
+
+ return 0;
+}
+
static int isp_of_parse_nodes(struct device *dev,
struct v4l2_async_notifier *notifier)
{
struct device_node *node = NULL;
+ int ret;
+ unsigned int flash = 0;
+ u32 group_id = 0;
notifier->subdevs = devm_kcalloc(
dev, ISP_MAX_SUBDEVS, sizeof(*notifier->subdevs), GFP_KERNEL);
@@ -2156,30 +2204,57 @@ static int isp_of_parse_nodes(struct device *dev,
while (notifier->num_subdevs < ISP_MAX_SUBDEVS &&
(node = of_graph_get_next_endpoint(dev->of_node, node))) {
- struct isp_async_subdev *isd;
+ ret = isp_of_parse_node(dev, node, notifier, group_id++, true);
+ if (ret)
+ return ret;
+ }
- isd = devm_kzalloc(dev, sizeof(*isd), GFP_KERNEL);
- if (!isd) {
- of_node_put(node);
- return -ENOMEM;
- }
+ while (notifier->num_subdevs < ISP_MAX_SUBDEVS &&
+ (node = of_parse_phandle(dev->of_node, "ti,camera-flashes",
+ flash++))) {
+ struct device_node *sensor_node =
+ of_parse_phandle(dev->of_node, "ti,camera-flashes",
+ flash++);
+ unsigned int i;
+ u32 flash_group_id;
+
+ if (!sensor_node)
+ return -EINVAL;
- notifier->subdevs[notifier->num_subdevs] = &isd->asd;
+ for (i = 0; i < notifier->num_subdevs; i++) {
+ struct isp_async_subdev *isd = container_of(
+ notifier->subdevs[i], struct isp_async_subdev,
+ asd);
- if (isp_of_parse_node(dev, node, isd)) {
- of_node_put(node);
- return -EINVAL;
+ if (!isd->bus)
+ continue;
+
+ dev_dbg(dev, "match \"%s\", \"%s\"\n",sensor_node->name,
+ isd->asd.match.of.node->name);
+
+ if (sensor_node != isd->asd.match.of.node)
+ continue;
+
+ dev_dbg(dev, "found\n");
+
+ flash_group_id = isd->group_id;
+ break;
}
- isd->asd.match.of.node = of_graph_get_remote_port_parent(node);
- of_node_put(node);
- if (!isd->asd.match.of.node) {
- dev_warn(dev, "bad remote port parent\n");
- return -EINVAL;
+ /*
+ * No sensor was found --- complain and allocate a new
+ * group ID.
+ */
+ if (i == notifier->num_subdevs) {
+ dev_warn(dev, "no device node \"%s\" was found",
+ sensor_node->name);
+ flash_group_id = group_id++;
}
- isd->asd.match_type = V4L2_ASYNC_MATCH_OF;
- notifier->num_subdevs++;
+ ret = isp_of_parse_node(dev, node, notifier, flash_group_id,
+ false);
+ if (ret)
+ return ret;
}
return notifier->num_subdevs;
@@ -2192,8 +2267,9 @@ static int isp_subdev_notifier_bound(struct v4l2_async_notifier *async,
struct isp_async_subdev *isd =
container_of(asd, struct isp_async_subdev, asd);
+// subdev->entity.group_id = isd->group_id;
isd->sd = subdev;
- isd->sd->host_priv = &isd->bus;
+ isd->sd->host_priv = isd->bus;
return 0;
}
@@ -2396,12 +2472,15 @@ static int isp_probe(struct platform_device *pdev)
if (ret < 0)
goto error_register_entities;
- isp->notifier.bound = isp_subdev_notifier_bound;
- isp->notifier.complete = isp_subdev_notifier_complete;
+ if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
+ isp->notifier.bound = isp_subdev_notifier_bound;
+ isp->notifier.complete = isp_subdev_notifier_complete;
- ret = v4l2_async_notifier_register(&isp->v4l2_dev, &isp->notifier);
- if (ret)
- goto error_register_entities;
+ ret = v4l2_async_notifier_register(&isp->v4l2_dev,
+ &isp->notifier);
+ if (ret)
+ goto error_register_entities;
+ }
isp_core_init(isp, 1);
omap3isp_put(isp);
diff --git a/drivers/media/platform/omap3isp/isp.h b/drivers/media/platform/omap3isp/isp.h
index 7e6f663..639b3ca 100644
--- a/drivers/media/platform/omap3isp/isp.h
+++ b/drivers/media/platform/omap3isp/isp.h
@@ -228,8 +228,9 @@ struct isp_device {
struct isp_async_subdev {
struct v4l2_subdev *sd;
- struct isp_bus_cfg bus;
+ struct isp_bus_cfg *bus;
struct v4l2_async_subdev asd;
+ u32 group_id;
};
#define v4l2_dev_to_isp_device(dev) \
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
index 495447d..750ce93 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -177,7 +177,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
struct isp_async_subdev *isd =
container_of(pipe->external->asd,
struct isp_async_subdev, asd);
- buscfg = &isd->bus;
+ buscfg = isd->bus;
}
if (buscfg->interface == ISP_INTERFACE_CCP2B_PHY1
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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