SYNOPSIS

int vga_switcheroo_unlock_ddc(struct pci_dev * pdev);

ARGUMENTS

pdev

client pci device

DESCRIPTION

Switch DDC lines back to the previous owner after calling vga_switcheroo_lock_ddc. This must be called even if vga_switcheroo_lock_ddc returned an error.

RETURN

Previous DDC owner on success (i.e. the client identifier of pdev) or a negative int on error. Specifically, -ENODEV if no handler has registered or if the handler does not support switching the DDC lines. Also, a negative value returned by the handler is propagated back to the caller. Finally, invoking this function without calling vga_switcheroo_lock_ddc first is not allowed and will result in -EINVAL.

AUTHORS

Jesse Barnes <jesse.barnes@intel.com>
Intel Corporation,         
        

Initial version

Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Ideas on board SPRL,         
        

Driver internals

Daniel Vetter <daniel.vetter@ffwll.ch>
Intel Corporation,         
        

Contributions all over the place

Lukas Wunner <lukas@wunner.de>

vga_switcheroo documentation

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