We need to allocate a buffer for the AOP on the OSLog endpoint for it to
fully boot. Copy in a modified version of the general OSLog endpoint
driver to do that.
Signed-off-by: Martin Povišer <povik@protonmail.com>
In t6000 ADT, the AOP SRAM base is specified *including* the bus offset
where the bus offset isn't expected, so our decoding of it includes the
bus offset twice. Patch it.
Signed-off-by: Martin Povišer <povik@protonmail.com>
We need to adapt the prop-parsing logic to give precedence to path
matching over name matching, since otherwise the audio-* rule (which is
already in the list) catches (...)/aop-audio/audio-pdm2. We want that
to fall under *aop-audio* rule instead.
Signed-off-by: Martin Povišer <povik@protonmail.com>
The Reloadable parent doesn't have an __init__ method, so calling the
super may call at unexpected places in richer inheritance hierarchies.
Signed-off-by: Martin Povišer <povik@protonmail.com>
Image Signal Processor is a co-processor in charge of Facetime camera
in Apple laptops. This tracer is based on ISP found in M1 processor.
The ISP in M1 SoC exposes seven inter-process communication channels.
Using those channels Application Processor (AP) can perform a variety of
task in the ISP and viceversa. All channels seems to be bidirectional, with
unique exception of TERMINAL channel.
DART translation is used often to translate control structures passed
over IPC channels to IO virtual addresses.
How those channels are used is still unclear but tracer should allow us
to dive deep on high-level protocol to communicate with Facetime camera.
ISP exposes also some I2C peripheral and SPMI registers but I haven't
dive into their working or purpose.
Signed-off-by: Kellerman Rivero <krsloco@gmail.com>
DCP and disp0 need their bootloader iommu mappings maintained until
an OS driver can take over. DCP's mappings have to be kept
indefinitively since it's unknown if or how it can be restarted.
Bindings based on
https://lore.kernel.org/asahi/20220923123557.866972-1-thierry.reding@gmail.com
Signed-off-by: Janne Grunau <j@jannau.net>
This prevents older systems from resetting dart-disp0 on init when they
encounter device trees with DCP/disp nodes.
Signed-off-by: Janne Grunau <j@jannau.net>
0 is a valid and used device virtual address. Daart functions returning
device address can not use 0 to indicate errors.
Signed-off-by: Janne Grunau <j@jannau.net>
It seems unclean startup sometimes takes longer. On top of that, if we
don't do a clean shutdown in the error path, the next startup will
continue failing (we know hard-disable triggers races and crashes the
ASC).
Signed-off-by: Hector Martin <marcan@marcan.st>
"simple-bus" restricts the node names to predefined list. "soc" looks
like the most appropiate name considering the dies are M1 Max SoCs.
Signed-off-by: Janne Grunau <j@jannau.net>
