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media: staging/imx: remove static subdev arrays
For more complex OF graphs, there will be more async subdevices registered. Remove the static subdev[IMX_MEDIA_MAX_SUBDEVS] array, so that imx-media places no limits on the number of async subdevs that can be added and registered. There were two uses for 'struct imx_media_subdev'. First was to act as the async subdev list to be passed to v4l2_async_notifier_register(). Second was to aid in inheriting subdev controls to the capture devices, and this is done by creating a list of capture devices that can be reached from a subdev's source pad. So 'struct imx_media_subdev' also contained a static array of 'struct imx_media_pad' for placing the capture device lists at each pad. 'struct imx_media_subdev' has been completely removed. Instead, at async completion, allocate an array of 'struct imx_media_pad' and attach it to the subdev's host_priv pointer, in order to support subdev controls inheritance. Likewise, remove static async_ptrs[IMX_MEDIA_MAX_SUBDEVS] array. Instead, allocate a 'struct imx_media_async_subdev' when forming the async list, and add it to an asd_list list_head in imx_media_add_async_subdev(). At async completion, allocate the asd pointer list and pull the asd's off asd_list for v4l2_async_notifier_register(). Signed-off-by:Steve Longerbeam <steve_longerbeam@mentor.com> Signed-off-by: