firmware: raspberrypi: Add RPI_FIRMWARE_NOTIFY_DISPLAY_DONE
The RPI_FIRMWARE_NOTIFY_DISPLAY_DONE firmware call allows to tell the firmware the kernel is in charge of the display now and the firmware can free whatever resources it was using. Acked-by: Nicolas Saenz Julienne <nsaenz@kernel.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20211215095117.176435-2-maxime@cerno.tech
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