This moves us one more step closer to eliminating the soc-camera bus
and devices on it. Besides, as a side effect, CSI-2 runtime PM on
sh-mobile secomes finer grained now: we only have to power on the
interface, when the device nodes are open.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
arch/arm/mach-shmobile/board-ap4evb.c | 12 +--
drivers/media/video/sh_mobile_ceu_camera.c | 117 ++++++++++++++++++------
drivers/media/video/sh_mobile_csi2.c | 135 +++++++++++++++-------------
include/media/sh_mobile_ceu.h | 10 ++-
include/media/sh_mobile_csi2.h | 8 +-
5 files changed, 180 insertions(+), 102 deletions(-)
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 08acb6e..08977ec 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -902,19 +902,16 @@ static struct resource csi2_resources[] = {
},
};
-static struct platform_device csi2_device = {
- .name = "sh-mobile-csi2",
- .id = 0,
+static struct sh_mobile_ceu_companion csi2 = {
+ .id = 0,
.num_resources = ARRAY_SIZE(csi2_resources),
.resource = csi2_resources,
- .dev = {
- .platform_data = &csi2_info,
- },
+ .platform_data = &csi2_info,
};
static struct sh_mobile_ceu_info sh_mobile_ceu_info = {
.flags = SH_CEU_FLAG_USE_8BIT_BUS,
- .csi2_dev = &csi2_device.dev,
+ .csi2 = &csi2,
};
static struct resource ceu_resources[] = {
@@ -958,7 +955,6 @@ static struct platform_device *ap4evb_devices[] __initdata = {
&lcdc1_device,
&lcdc_device,
&hdmi_device,
- &csi2_device,
&ceu_device,
&ap4evb_camera,
};
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index b08debc..6d574ca 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -39,6 +39,7 @@
#include <media/v4l2-dev.h>
#include <media/soc_camera.h>
#include <media/sh_mobile_ceu.h>
+#include <media/sh_mobile_csi2.h>
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-mediabus.h>
#include <media/soc_mediabus.h>
@@ -96,6 +97,7 @@ struct sh_mobile_ceu_buffer {
struct sh_mobile_ceu_dev {
struct soc_camera_host ici;
struct soc_camera_device *icd;
+ struct platform_device *csi2_pdev;
unsigned int irq;
void __iomem *base;
@@ -499,11 +501,26 @@ out:
return IRQ_HANDLED;
}
+static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
+{
+ struct v4l2_subdev *sd;
+
+ if (!pcdev->csi2_pdev)
+ return NULL;
+
+ v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
+ if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
+ return sd;
+
+ return NULL;
+}
+
/* Called with .video_lock held */
static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
+ struct v4l2_subdev *csi2_sd;
int ret;
if (pcdev->icd)
@@ -516,8 +533,16 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
pm_runtime_get_sync(ici->v4l2_dev.dev);
ret = sh_mobile_ceu_soft_reset(pcdev);
- if (!ret)
+
+ csi2_sd = find_csi2(pcdev);
+
+ ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
+ if (ret != -ENODEV && ret != -ENOIOCTLCMD && ret < 0) {
+ pm_runtime_put_sync(ici->v4l2_dev.dev);
+ } else {
pcdev->icd = icd;
+ ret = 0;
+ }
return ret;
}
@@ -527,9 +552,11 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
+ struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
BUG_ON(icd != pcdev->icd);
+ v4l2_subdev_call(csi2_sd, core, s_power, 0);
/* disable capture, disable interrupts */
ceu_write(pcdev, CEIER, 0);
sh_mobile_ceu_soft_reset(pcdev);
@@ -641,7 +668,7 @@ static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
}
/* CSI2 special configuration */
- if (pcdev->pdata->csi2_dev) {
+ if (pcdev->pdata->csi2) {
in_width = ((in_width - 2) * 2);
left_offset *= 2;
}
@@ -783,7 +810,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
value |= pcdev->is_16bit ? 1 << 12 : 0;
/* CSI2 mode */
- if (pcdev->pdata->csi2_dev)
+ if (pcdev->pdata->csi2)
value |= 3 << 12;
ceu_write(pcdev, CAMCR, value);
@@ -921,7 +948,7 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int
return 0;
}
- if (!pcdev->pdata->csi2_dev) {
+ if (!pcdev->pdata->csi2) {
ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
if (ret < 0)
return 0;
@@ -1945,7 +1972,7 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
.notifier.notifier_call = bus_notify,
};
- struct device *csi2;
+ struct sh_mobile_ceu_companion *csi2;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
@@ -2018,26 +2045,61 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
pcdev->ici.drv_name = dev_name(&pdev->dev);
pcdev->ici.ops = &sh_mobile_ceu_host_ops;
+ pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(pcdev->alloc_ctx)) {
+ err = PTR_ERR(pcdev->alloc_ctx);
+ goto exit_free_clk;
+ }
+
+ err = soc_camera_host_register(&pcdev->ici);
+ if (err)
+ goto exit_free_ctx;
+
/* CSI2 interfacing */
- csi2 = pcdev->pdata->csi2_dev;
+ csi2 = pcdev->pdata->csi2;
if (csi2) {
- wait.dev = csi2;
+ struct platform_device *csi2_pdev =
+ platform_device_alloc("sh-mobile-csi2", csi2->id);
+ struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
+
+ if (!csi2_pdev) {
+ err = -ENOMEM;
+ goto exit_host_unregister;
+ }
+
+ pcdev->csi2_pdev = csi2_pdev;
+
+ err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
+ if (err < 0)
+ goto exit_pdev_put;
+
+ csi2_pdata = csi2_pdev->dev.platform_data;
+ csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
+
+ csi2_pdev->resource = csi2->resource;
+ csi2_pdev->num_resources = csi2->num_resources;
+
+ err = platform_device_add(csi2_pdev);
+ if (err < 0)
+ goto exit_pdev_put;
+
+ wait.dev = &csi2_pdev->dev;
err = bus_register_notifier(&platform_bus_type, &wait.notifier);
if (err < 0)
- goto exit_free_clk;
+ goto exit_pdev_unregister;
/*
* From this point the driver module will not unload, until
* we complete the completion.
*/
- if (!csi2->driver) {
+ if (!csi2_pdev->dev.driver) {
complete(&wait.completion);
/* Either too late, or probing failed */
bus_unregister_notifier(&platform_bus_type, &wait.notifier);
err = -ENXIO;
- goto exit_free_clk;
+ goto exit_pdev_unregister;
}
/*
@@ -2046,34 +2108,28 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
* the "owner" is safe!
*/
- err = try_module_get(csi2->driver->owner);
+ err = try_module_get(csi2_pdev->dev.driver->owner);
/* Let notifier complete, if it has been locked */
complete(&wait.completion);
bus_unregister_notifier(&platform_bus_type, &wait.notifier);
if (!err) {
err = -ENODEV;
- goto exit_free_clk;
+ goto exit_pdev_unregister;
}
}
- pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
- if (IS_ERR(pcdev->alloc_ctx)) {
- err = PTR_ERR(pcdev->alloc_ctx);
- goto exit_module_put;
- }
-
- err = soc_camera_host_register(&pcdev->ici);
- if (err)
- goto exit_free_ctx;
-
return 0;
+exit_pdev_unregister:
+ platform_device_del(pcdev->csi2_pdev);
+exit_pdev_put:
+ pcdev->csi2_pdev->resource = NULL;
+ platform_device_put(pcdev->csi2_pdev);
+exit_host_unregister:
+ soc_camera_host_unregister(&pcdev->ici);
exit_free_ctx:
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
-exit_module_put:
- if (csi2 && csi2->driver)
- module_put(csi2->driver->owner);
exit_free_clk:
pm_runtime_disable(&pdev->dev);
free_irq(pcdev->irq, pcdev);
@@ -2093,7 +2149,7 @@ static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
struct sh_mobile_ceu_dev, ici);
- struct device *csi2 = pcdev->pdata->csi2_dev;
+ struct platform_device *csi2_pdev = pcdev->csi2_pdev;
soc_camera_host_unregister(soc_host);
pm_runtime_disable(&pdev->dev);
@@ -2102,8 +2158,13 @@ static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
dma_release_declared_memory(&pdev->dev);
iounmap(pcdev->base);
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
- if (csi2 && csi2->driver)
- module_put(csi2->driver->owner);
+ if (csi2_pdev && csi2_pdev->dev.driver) {
+ struct module *csi2_drv = csi2_pdev->dev.driver->owner;
+ platform_device_del(csi2_pdev);
+ csi2_pdev->resource = NULL;
+ platform_device_put(csi2_pdev);
+ module_put(csi2_drv);
+ }
kfree(pcdev);
return 0;
diff --git a/drivers/media/video/sh_mobile_csi2.c b/drivers/media/video/sh_mobile_csi2.c
index 98b8748..2893a01 100644
--- a/drivers/media/video/sh_mobile_csi2.c
+++ b/drivers/media/video/sh_mobile_csi2.c
@@ -16,6 +16,7 @@
#include <linux/slab.h>
#include <linux/videodev2.h>
+#include <media/sh_mobile_ceu.h>
#include <media/sh_mobile_csi2.h>
#include <media/soc_camera.h>
#include <media/v4l2-common.h>
@@ -33,7 +34,6 @@
struct sh_csi2 {
struct v4l2_subdev subdev;
struct list_head list;
- struct notifier_block notifier;
unsigned int irq;
void __iomem *base;
struct platform_device *pdev;
@@ -132,13 +132,6 @@ static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
.try_mbus_fmt = sh_csi2_try_fmt,
};
-static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops;
-
-static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
- .core = &sh_csi2_subdev_core_ops,
- .video = &sh_csi2_subdev_video_ops,
-};
-
static void sh_csi2_hwinit(struct sh_csi2 *priv)
{
struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
@@ -186,65 +179,84 @@ static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd)
return soc_camera_apply_sensor_flags(icl, flags);
}
-static int sh_csi2_notify(struct notifier_block *nb,
- unsigned long action, void *data)
+static int sh_csi2_client_connect(struct sh_csi2 *priv)
{
- struct device *dev = data;
- struct soc_camera_device *icd = to_soc_camera_dev(dev);
- struct v4l2_device *v4l2_dev = dev_get_drvdata(dev->parent);
- struct sh_csi2 *priv =
- container_of(nb, struct sh_csi2, notifier);
struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
- int ret, i;
+ struct v4l2_subdev *sd, *csi2_sd = &priv->subdev;
+ struct soc_camera_device *icd = NULL;
+ struct device *dev = v4l2_get_subdevdata(&priv->subdev);
+ int i;
+
+ v4l2_device_for_each_subdev(sd, csi2_sd->v4l2_dev)
+ if (sd->grp_id) {
+ icd = (struct soc_camera_device *)sd->grp_id;
+ break;
+ }
+
+ if (!icd)
+ return -EINVAL;
for (i = 0; i < pdata->num_clients; i++)
if (&pdata->clients[i].pdev->dev == icd->pdev)
break;
- dev_dbg(dev, "%s(%p): action = %lu, found #%d\n", __func__, dev, action, i);
+ dev_dbg(dev, "%s(%p): found #%d\n", __func__, dev, i);
if (i == pdata->num_clients)
- return NOTIFY_DONE;
+ return -ENODEV;
- switch (action) {
- case BUS_NOTIFY_BOUND_DRIVER:
- snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s%s",
- dev_name(v4l2_dev->dev), ".mipi-csi");
- priv->subdev.grp_id = (long)icd;
- ret = v4l2_device_register_subdev(v4l2_dev, &priv->subdev);
- dev_dbg(dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
- if (ret < 0)
- return NOTIFY_DONE;
+ priv->client = pdata->clients + i;
- priv->client = pdata->clients + i;
+ priv->set_bus_param = icd->ops->set_bus_param;
+ priv->query_bus_param = icd->ops->query_bus_param;
+ icd->ops->set_bus_param = sh_csi2_set_bus_param;
+ icd->ops->query_bus_param = sh_csi2_query_bus_param;
- priv->set_bus_param = icd->ops->set_bus_param;
- priv->query_bus_param = icd->ops->query_bus_param;
- icd->ops->set_bus_param = sh_csi2_set_bus_param;
- icd->ops->query_bus_param = sh_csi2_query_bus_param;
+ csi2_sd->grp_id = (long)icd;
- pm_runtime_get_sync(v4l2_get_subdevdata(&priv->subdev));
+ pm_runtime_get_sync(dev);
- sh_csi2_hwinit(priv);
- break;
- case BUS_NOTIFY_UNBIND_DRIVER:
- priv->client = NULL;
+ sh_csi2_hwinit(priv);
- /* Driver is about to be unbound */
- icd->ops->set_bus_param = priv->set_bus_param;
- icd->ops->query_bus_param = priv->query_bus_param;
- priv->set_bus_param = NULL;
- priv->query_bus_param = NULL;
+ return 0;
+}
- v4l2_device_unregister_subdev(&priv->subdev);
+static void sh_csi2_client_disconnect(struct sh_csi2 *priv)
+{
+ struct soc_camera_device *icd = (struct soc_camera_device *)priv->subdev.grp_id;
- pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
- break;
- }
+ priv->client = NULL;
+ priv->subdev.grp_id = 0;
- return NOTIFY_OK;
+ /* Driver is about to be unbound */
+ icd->ops->set_bus_param = priv->set_bus_param;
+ icd->ops->query_bus_param = priv->query_bus_param;
+ priv->set_bus_param = NULL;
+ priv->query_bus_param = NULL;
+
+ pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
}
+static int sh_csi2_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
+
+ if (on)
+ return sh_csi2_client_connect(priv);
+
+ sh_csi2_client_disconnect(priv);
+ return 0;
+}
+
+static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops = {
+ .s_power = sh_csi2_s_power,
+};
+
+static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
+ .core = &sh_csi2_subdev_core_ops,
+ .video = &sh_csi2_subdev_video_ops,
+};
+
static __devinit int sh_csi2_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -274,14 +286,6 @@ static __devinit int sh_csi2_probe(struct platform_device *pdev)
return -ENOMEM;
priv->irq = irq;
- priv->notifier.notifier_call = sh_csi2_notify;
-
- /* We MUST attach after the MIPI sensor */
- ret = bus_register_notifier(&soc_camera_bus_type, &priv->notifier);
- if (ret < 0) {
- dev_err(&pdev->dev, "CSI2 cannot register notifier\n");
- goto ernotify;
- }
if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
dev_err(&pdev->dev, "CSI2 register region already claimed\n");
@@ -297,11 +301,17 @@ static __devinit int sh_csi2_probe(struct platform_device *pdev)
}
priv->pdev = pdev;
+ platform_set_drvdata(pdev, priv);
v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops);
v4l2_set_subdevdata(&priv->subdev, &pdev->dev);
- platform_set_drvdata(pdev, priv);
+ snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.mipi-csi",
+ dev_name(pdata->v4l2_dev->dev));
+ ret = v4l2_device_register_subdev(pdata->v4l2_dev, &priv->subdev);
+ dev_dbg(&pdev->dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
+ if (ret < 0)
+ goto esdreg;
pm_runtime_enable(&pdev->dev);
@@ -309,11 +319,11 @@ static __devinit int sh_csi2_probe(struct platform_device *pdev)
return 0;
+esdreg:
+ iounmap(priv->base);
eremap:
release_mem_region(res->start, resource_size(res));
ereqreg:
- bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
-ernotify:
kfree(priv);
return ret;
@@ -324,7 +334,7 @@ static __devexit int sh_csi2_remove(struct platform_device *pdev)
struct sh_csi2 *priv = platform_get_drvdata(pdev);
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
+ v4l2_device_unregister_subdev(&priv->subdev);
pm_runtime_disable(&pdev->dev);
iounmap(priv->base);
release_mem_region(res->start, resource_size(res));
@@ -335,8 +345,9 @@ static __devexit int sh_csi2_remove(struct platform_device *pdev)
}
static struct platform_driver __refdata sh_csi2_pdrv = {
- .remove = __devexit_p(sh_csi2_remove),
- .driver = {
+ .remove = __devexit_p(sh_csi2_remove),
+ .probe = sh_csi2_probe,
+ .driver = {
.name = "sh-mobile-csi2",
.owner = THIS_MODULE,
},
@@ -344,7 +355,7 @@ static struct platform_driver __refdata sh_csi2_pdrv = {
static int __init sh_csi2_init(void)
{
- return platform_driver_probe(&sh_csi2_pdrv, sh_csi2_probe);
+ return platform_driver_register(&sh_csi2_pdrv);
}
static void __exit sh_csi2_exit(void)
diff --git a/include/media/sh_mobile_ceu.h b/include/media/sh_mobile_ceu.h
index 80346a6..48413b4 100644
--- a/include/media/sh_mobile_ceu.h
+++ b/include/media/sh_mobile_ceu.h
@@ -7,10 +7,18 @@
#define SH_CEU_FLAG_VSYNC_LOW (1 << 3) /* default High if possible */
struct device;
+struct resource;
+
+struct sh_mobile_ceu_companion {
+ u32 num_resources;
+ struct resource *resource;
+ int id;
+ void *platform_data;
+};
struct sh_mobile_ceu_info {
unsigned long flags;
- struct device *csi2_dev;
+ struct sh_mobile_ceu_companion *csi2;
};
#endif /* __ASM_SH_MOBILE_CEU_H__ */
diff --git a/include/media/sh_mobile_csi2.h b/include/media/sh_mobile_csi2.h
index 4d26151..c586c4f 100644
--- a/include/media/sh_mobile_csi2.h
+++ b/include/media/sh_mobile_csi2.h
@@ -11,6 +11,8 @@
#ifndef SH_MIPI_CSI
#define SH_MIPI_CSI
+#include <linux/list.h>
+
enum sh_csi2_phy {
SH_CSI2_PHY_MAIN,
SH_CSI2_PHY_SUB,
@@ -33,14 +35,14 @@ struct sh_csi2_client_config {
struct platform_device *pdev; /* client platform device */
};
+struct v4l2_device;
+
struct sh_csi2_pdata {
enum sh_csi2_type type;
unsigned int flags;
struct sh_csi2_client_config *clients;
int num_clients;
+ struct v4l2_device *v4l2_dev;
};
-struct device;
-struct v4l2_device;
-
#endif
--
1.7.2.5
--
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