From e09da11da49c6fd625be52d8b60bbbbe225a9db6 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Wed, 26 Dec 2012 12:44:11 -0300 Subject: [media] soc-camera: add V4L2-async support 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. The selected approach adds a notifier for each struct soc_camera_device instance, i.e. for each video device node, even when there are multiple such instances registered with a single soc-camera host simultaneously. Signed-off-by: Guennadi Liakhovetski Acked-by: Hans Verkuil Acked-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- include/media/soc_camera.h | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h index f582323fafb7..906ed98c6e95 100644 --- a/include/media/soc_camera.h +++ b/include/media/soc_camera.h @@ -19,11 +19,13 @@ #include #include #include +#include #include #include struct file; struct soc_camera_desc; +struct soc_camera_async_client; struct soc_camera_device { struct list_head list; /* list of all registered devices */ @@ -50,6 +52,9 @@ struct soc_camera_device { int use_count; struct file *streamer; /* stream owner */ struct v4l2_clk *clk; + /* Asynchronous subdevice management */ + struct soc_camera_async_client *sasc; + /* video buffer queue */ union { struct videobuf_queue vb_vidq; struct vb2_queue vb2_vidq; @@ -59,16 +64,30 @@ struct soc_camera_device { /* Host supports programmable stride */ #define SOCAM_HOST_CAP_STRIDE (1 << 0) +enum soc_camera_subdev_role { + SOCAM_SUBDEV_DATA_SOURCE = 1, + SOCAM_SUBDEV_DATA_SINK, + SOCAM_SUBDEV_DATA_PROCESSOR, +}; + +struct soc_camera_async_subdev { + struct v4l2_async_subdev asd; + enum soc_camera_subdev_role role; +}; + struct soc_camera_host { struct v4l2_device v4l2_dev; struct list_head list; - struct mutex host_lock; /* Protect pipeline modifications */ + struct mutex host_lock; /* Main synchronisation lock */ + struct mutex clk_lock; /* Protect pipeline modifications */ unsigned char nr; /* Host number */ u32 capabilities; struct soc_camera_device *icd; /* Currently attached client */ void *priv; const char *drv_name; struct soc_camera_host_ops *ops; + struct v4l2_async_subdev **asd; /* Flat array, arranged in groups */ + int *asd_sizes; /* 0-terminated array of asd group sizes */ }; struct soc_camera_host_ops { @@ -161,6 +180,7 @@ struct soc_camera_host_desc { }; /* + * Platform data for "soc-camera-pdrv" * This MUST be kept binary-identical to struct soc_camera_link below, until * it is completely replaced by this one, after which we can split it into its * two components. @@ -326,6 +346,7 @@ static inline void soc_camera_limit_side(int *start, int *length, unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd, const struct v4l2_mbus_config *cfg); +int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd); int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd, struct v4l2_clk *clk); int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd, -- cgit v1.2.3