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Driver now supports bFrameIndex through configfs; enable reading this
attribute from configfs. This is necessary to associate the correct
bFrameIndexes with the UVC frame descriptors.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Extend the ConfigFS parser to parse UVC formats and intervals.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Modify the attribute_read() function to not add a terminating 0 to the
buffer, and to return the number of bytes read, in order to support
binary attributes. The attribute_read_uint() and attribute_read_str()
functions are modified accordingly to use the new attribute_read()
semantics.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Move all attribute parsing to a top-level configfs_parse_uvc() function,
and split control and streaming interface attributes to two separate
helper functions. In addition to making the code more structured, it
will also allow supporting multiple streaming interfaces in a single UVC
function in the future.
The uvc_function_config structure is similarly reorganized in a
hierarchical representation of the configuration.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Interface numbers are crucial parameters required for proper UVC gadget
operation. If we can't parse them from ConfigFS there's little point in
falling back to defaults that have a high chance being wrong. Treating
that case as a fatal error is better to get the root cause fixed.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Store the function configuration pointer in the uvc_device, and use it
to identify and store the interface numbers from configfs.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Parse a configuration name from the commandline, and utilise it to
identify the configfs configuration path.
Only the short-name (i.e. "uvc.1") is necessary to provide if there is
no ambiguity regarding the gadget, otherwise the gadget path should be
included ("g1/functions/uvc.1"). If the parameter is not provided then
the first function is utilised.
Legacy g_webcam is still supported, and the parameter will define the
UDC to match against if provided.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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