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drm/vc4: dsi: Release workaround buffer and DMA
[ Upstream commit 89c4bbe ] On Pi0-3 the driver allocates a buffer and requests a DMA channel because the ARM can't write to DSI1's registers directly. However, we never release that buffer or channel. Let's add a device-managed action to release each. Fixes: 4078f57 ("drm/vc4: Add DSI driver") Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Link: https://lore.kernel.org/r/20220613144800.326124-12-maxime@cerno.tech Signed-off-by: Maxime Ripard <maxime@cerno.tech> Signed-off-by: Sasha Levin <sashal@kernel.org>
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