Add support for registering external sensor subdevs using v4l2-async API. The async API is used only for sensor subdevs and only for booting from DT. Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- Changes since v4: - call v4l2_async_notifier_register() only if any camera sensor is specified in devicetree, so the driver can initialize even if only mem-to-mem functionality is used. Changes since v2: - none. Changes since v1: - register clock provider after registering FIMC devices so the clock can be actually used right after it is registered.Changes since v1: - register clock provider after registering FIMC devices so the clock can be actually used right after it is registered. --- drivers/media/platform/exynos4-is/media-dev.c | 237 ++++++++++++++----------- drivers/media/platform/exynos4-is/media-dev.h | 13 +- 2 files changed, 147 insertions(+), 103 deletions(-) diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c index 6b21113..9ebe738 100644 --- a/drivers/media/platform/exynos4-is/media-dev.c +++ b/drivers/media/platform/exynos4-is/media-dev.c @@ -26,6 +26,7 @@ #include <linux/pm_runtime.h> #include <linux/types.h> #include <linux/slab.h> +#include <media/v4l2-async.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-of.h> #include <media/media-device.h> @@ -220,6 +221,7 @@ static int __fimc_pipeline_open(struct exynos_media_pipeline *ep, if (ret < 0) return ret; } + ret = fimc_md_set_camclk(sd, true); if (ret < 0) goto err_wbclk; @@ -380,77 +382,18 @@ static void fimc_md_unregister_sensor(struct v4l2_subdev *sd) struct i2c_client *client = v4l2_get_subdevdata(sd); struct i2c_adapter *adapter; - if (!client) + if (!client || client->dev.of_node) return; v4l2_device_unregister_subdev(sd); - if (!client->dev.of_node) { - adapter = client->adapter; - i2c_unregister_device(client); - if (adapter) - i2c_put_adapter(adapter); - } + adapter = client->adapter; + i2c_unregister_device(client); + if (adapter) + i2c_put_adapter(adapter); } #ifdef CONFIG_OF -/* Register I2C client subdev associated with @node. */ -static int fimc_md_of_add_sensor(struct fimc_md *fmd, - struct device_node *node, int index) -{ - struct fimc_sensor_info *si; - struct i2c_client *client; - struct v4l2_subdev *sd; - int ret; - - if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) - return -EINVAL; - si = &fmd->sensor[index]; - - client = of_find_i2c_device_by_node(node); - if (!client) - return -EPROBE_DEFER; - - device_lock(&client->dev); - - if (!client->dev.driver || - !try_module_get(client->dev.driver->owner)) { - ret = -EPROBE_DEFER; - v4l2_info(&fmd->v4l2_dev, "No driver found for %s\n", - node->full_name); - goto dev_put; - } - - /* Enable sensor's master clock */ - ret = __fimc_md_set_camclk(fmd, &si->pdata, true); - if (ret < 0) - goto mod_put; - sd = i2c_get_clientdata(client); - - ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); - __fimc_md_set_camclk(fmd, &si->pdata, false); - if (ret < 0) - goto mod_put; - - v4l2_set_subdev_hostdata(sd, &si->pdata); - if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) - sd->grp_id = GRP_ID_FIMC_IS_SENSOR; - else - sd->grp_id = GRP_ID_SENSOR; - - si->subdev = sd; - v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n", - sd->name, fmd->num_sensors); - fmd->num_sensors++; - -mod_put: - module_put(client->dev.driver->owner); -dev_put: - device_unlock(&client->dev); - put_device(&client->dev); - return ret; -} - /* Parse port node and register as a sub-device any sensor specified there. */ static int fimc_md_parse_port_node(struct fimc_md *fmd, struct device_node *port, @@ -459,7 +402,6 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd, struct device_node *rem, *ep, *np; struct fimc_source_info *pd; struct v4l2_of_endpoint endpoint; - int ret; u32 val; pd = &fmd->sensor[index].pdata; @@ -487,6 +429,8 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd, if (!of_property_read_u32(rem, "clock-frequency", &val)) pd->clk_frequency = val; + else + pd->clk_frequency = DEFAULT_SENSOR_CLK_FREQ; if (pd->clk_frequency == 0) { v4l2_err(&fmd->v4l2_dev, "Wrong clock frequency at node %s\n", @@ -526,10 +470,17 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd, else pd->fimc_bus_type = pd->sensor_bus_type; - ret = fimc_md_of_add_sensor(fmd, rem, index); - of_node_put(rem); + if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) + return -EINVAL; - return ret; + fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF; + fmd->sensor[index].asd.match.of.node = rem; + fmd->async_subdevs[index] = &fmd->sensor[index].asd; + + fmd->num_sensors++; + + of_node_put(rem); + return 0; } /* Register all SoC external sub-devices */ @@ -885,11 +836,13 @@ static void fimc_md_unregister_entities(struct fimc_md *fmd) v4l2_device_unregister_subdev(fmd->csis[i].sd); fmd->csis[i].sd = NULL; } - for (i = 0; i < fmd->num_sensors; i++) { - if (fmd->sensor[i].subdev == NULL) - continue; - fimc_md_unregister_sensor(fmd->sensor[i].subdev); - fmd->sensor[i].subdev = NULL; + if (fmd->pdev->dev.of_node == NULL) { + for (i = 0; i < fmd->num_sensors; i++) { + if (fmd->sensor[i].subdev == NULL) + continue; + fimc_md_unregister_sensor(fmd->sensor[i].subdev); + fmd->sensor[i].subdev = NULL; + } } if (fmd->fimc_is) @@ -1224,6 +1177,14 @@ static int __fimc_md_set_camclk(struct fimc_md *fmd, struct fimc_camclk_info *camclk; int ret = 0; + /* + * When device tree is used the sensor drivers are supposed to + * control the clock themselves. This whole function will be + * removed once S5PV210 platform is converted to the device tree. + */ + if (fmd->pdev->dev.of_node) + return 0; + if (WARN_ON(si->clk_id >= FIMC_MAX_CAMCLKS) || !fmd || !fmd->pmf) return -EINVAL; @@ -1536,6 +1497,56 @@ err: #define fimc_md_unregister_clk_provider(fmd) (0) #endif +static int subdev_notifier_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct fimc_md *fmd = notifier_to_fimc_md(notifier); + struct fimc_sensor_info *si = NULL; + int i; + + /* Find platform data for this sensor subdev */ + for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++) + if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node) + si = &fmd->sensor[i]; + + if (si == NULL) + return -EINVAL; + + v4l2_set_subdev_hostdata(subdev, &si->pdata); + + if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) + subdev->grp_id = GRP_ID_FIMC_IS_SENSOR; + else + subdev->grp_id = GRP_ID_SENSOR; + + si->subdev = subdev; + + v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n", + subdev->name, fmd->num_sensors); + + fmd->num_sensors++; + + return 0; +} + +static int subdev_notifier_complete(struct v4l2_async_notifier *notifier) +{ + struct fimc_md *fmd = notifier_to_fimc_md(notifier); + int ret; + + mutex_lock(&fmd->media_dev.graph_mutex); + + ret = fimc_md_create_links(fmd); + if (ret < 0) + goto unlock; + + ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); +unlock: + mutex_unlock(&fmd->media_dev.graph_mutex); + return ret; +} + static int fimc_md_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1563,12 +1574,6 @@ static int fimc_md_probe(struct platform_device *pdev) fmd->use_isp = fimc_md_is_isp_available(dev->of_node); - ret = fimc_md_register_clk_provider(fmd); - if (ret < 0) { - v4l2_err(v4l2_dev, "clock provider registration failed\n"); - return ret; - } - ret = v4l2_device_register(dev, &fmd->v4l2_dev); if (ret < 0) { v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); @@ -1578,64 +1583,89 @@ static int fimc_md_probe(struct platform_device *pdev) ret = media_device_register(&fmd->media_dev); if (ret < 0) { v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret); - goto err_md; + goto err_v4l2_dev; } ret = fimc_md_get_clocks(fmd); if (ret) - goto err_clk; + goto err_md; fmd->user_subdev_api = (dev->of_node != NULL); - /* Protect the media graph while we're registering entities */ - mutex_lock(&fmd->media_dev.graph_mutex); - ret = fimc_md_get_pinctrl(fmd); if (ret < 0) { if (ret != EPROBE_DEFER) dev_err(dev, "Failed to get pinctrl: %d\n", ret); - goto err_unlock; + goto err_clk; } + platform_set_drvdata(pdev, fmd); + + /* Protect the media graph while we're registering entities */ + mutex_lock(&fmd->media_dev.graph_mutex); + if (dev->of_node) ret = fimc_md_register_of_platform_entities(fmd, dev->of_node); else ret = bus_for_each_dev(&platform_bus_type, NULL, fmd, fimc_md_pdev_match); - if (ret) - goto err_unlock; + if (ret) { + mutex_unlock(&fmd->media_dev.graph_mutex); + goto err_clk; + } if (dev->platform_data || dev->of_node) { ret = fimc_md_register_sensor_entities(fmd); - if (ret) - goto err_unlock; + if (ret) { + mutex_unlock(&fmd->media_dev.graph_mutex); + goto err_m_ent; + } } - ret = fimc_md_create_links(fmd); - if (ret) - goto err_unlock; - - ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); - if (ret) - goto err_unlock; + mutex_unlock(&fmd->media_dev.graph_mutex); ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode); if (ret) - goto err_unlock; + goto err_m_ent; + /* + * FIMC platform devices need to be registered before the sclk_cam + * clocks provider, as one of these devices needs to be activated + * to enable the clock. + */ + ret = fimc_md_register_clk_provider(fmd); + if (ret < 0) { + v4l2_err(v4l2_dev, "clock provider registration failed\n"); + goto err_attr; + } + + if (fmd->num_sensors > 0) { + fmd->subdev_notifier.subdevs = fmd->async_subdevs; + fmd->subdev_notifier.num_subdevs = fmd->num_sensors; + fmd->subdev_notifier.bound = subdev_notifier_bound; + fmd->subdev_notifier.complete = subdev_notifier_complete; + fmd->num_sensors = 0; + + ret = v4l2_async_notifier_register(&fmd->v4l2_dev, + &fmd->subdev_notifier); + if (ret) + goto err_clk_p; + } - platform_set_drvdata(pdev, fmd); - mutex_unlock(&fmd->media_dev.graph_mutex); return 0; -err_unlock: - mutex_unlock(&fmd->media_dev.graph_mutex); +err_clk_p: + fimc_md_unregister_clk_provider(fmd); +err_attr: + device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); err_clk: fimc_md_put_clocks(fmd); +err_m_ent: fimc_md_unregister_entities(fmd); media_device_unregister(&fmd->media_dev); err_md: + media_device_unregister(&fmd->media_dev); +err_v4l2_dev: v4l2_device_unregister(&fmd->v4l2_dev); - fimc_md_unregister_clk_provider(fmd); return ret; } @@ -1647,12 +1677,15 @@ static int fimc_md_remove(struct platform_device *pdev) return 0; fimc_md_unregister_clk_provider(fmd); + v4l2_async_notifier_unregister(&fmd->subdev_notifier); + v4l2_device_unregister(&fmd->v4l2_dev); device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); fimc_md_unregister_entities(fmd); fimc_md_pipelines_free(fmd); media_device_unregister(&fmd->media_dev); fimc_md_put_clocks(fmd); + return 0; } diff --git a/drivers/media/platform/exynos4-is/media-dev.h b/drivers/media/platform/exynos4-is/media-dev.h index a88cee5..ee1e251 100644 --- a/drivers/media/platform/exynos4-is/media-dev.h +++ b/drivers/media/platform/exynos4-is/media-dev.h @@ -32,8 +32,9 @@ #define PINCTRL_STATE_IDLE "idle" -#define FIMC_MAX_SENSORS 8 +#define FIMC_MAX_SENSORS 4 #define FIMC_MAX_CAMCLKS 2 +#define DEFAULT_SENSOR_CLK_FREQ 24000000U /* LCD/ISP Writeback clocks (PIXELASYNCMx) */ enum { @@ -79,6 +80,7 @@ struct fimc_camclk_info { /** * struct fimc_sensor_info - image data source subdev information * @pdata: sensor's atrributes passed as media device's platform data + * @asd: asynchronous subdev registration data structure * @subdev: image sensor v4l2 subdev * @host: fimc device the sensor is currently linked to * @@ -86,6 +88,7 @@ struct fimc_camclk_info { */ struct fimc_sensor_info { struct fimc_source_info pdata; + struct v4l2_async_subdev asd; struct v4l2_subdev *subdev; struct fimc_dev *host; }; @@ -145,6 +148,9 @@ struct fimc_md { int num_clocks; } clk_provider; + struct v4l2_async_notifier subdev_notifier; + struct v4l2_async_subdev *async_subdevs[FIMC_MAX_SENSORS]; + bool user_subdev_api; spinlock_t slock; struct list_head pipelines; @@ -162,6 +168,11 @@ static inline struct fimc_md *entity_to_fimc_mdev(struct media_entity *me) container_of(me->parent, struct fimc_md, media_dev); } +static inline struct fimc_md *notifier_to_fimc_md(struct v4l2_async_notifier *n) +{ + return container_of(n, struct fimc_md, subdev_notifier); +} + static inline void fimc_md_graph_lock(struct exynos_video_entity *ve) { mutex_lock(&ve->vdev.entity.parent->graph_mutex); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html