tree 4591dd41947c45584b8ea343d4ac1e9a4eaef850
parent 8355ba0b459240e847584f780402073b8236df46
author Laurent Pinchart <laurent.pinchart@ideasonboard.com> 1711483086 +0200
committer Vegard Nossum <vegard.nossum@oracle.com> 1720426473 +0000

firmware: raspberrypi: Use correct device for DMA mappings

[ Upstream commit df518a0ae1b982a4dcf2235464016c0c4576a34d ]

The buffer used to transfer data over the mailbox interface is mapped
using the client's device. This is incorrect, as the device performing
the DMA transfer is the mailbox itself. Fix it by using the mailbox
controller device instead.

This requires including the mailbox_controller.h header to dereference
the mbox_chan and mbox_controller structures. The header is not meant to
be included by clients. This could be fixed by extending the client API
with a function to access the controller's device.

Fixes: 4e3d60656a72 ("ARM: bcm2835: Add the Raspberry Pi firmware driver")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
Tested-by: Ivan T. Ivanov <iivanov@suse.de>
Link: https://lore.kernel.org/r/20240326195807.15163-3-laurent.pinchart@ideasonboard.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit b7277844e7e367381b2377853afceb58427cf6fb)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>