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1236 commits

Author SHA1 Message Date
Asahi Lina
7a92257d30 m1n1.agx.render: Change heap size to 0x200 
This seems to be the AGX value

Signed-off-by: Asahi Lina <lina@asahilina.net>
 2023-01-20 18:18:13 +09:00
Asahi Lina
e774b5c521 m1n1.trace.agx: Log hook writes 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2023-01-20 18:18:13 +09:00
Asahi Lina
8e77f8f49f m1n1.fw.agx.channels: Do not require contiguous pages for channel state 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2023-01-20 18:18:13 +09:00
Martin Povišer
2cb6cb46ca tools/run_guest.py: Add -v option for attaching 9P virtio exports 
Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
93c20e9395 m1n1.hv: Allocate virtio resources if unspecified 
Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
020d86a23f m1n1.utils: Fix len() overflow in RangeMap 
This is to fix

  OverflowError: Python int too large to convert to C ssize_t

in case the upper bound of a range is 1<<64.

Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
c760e02388 hv: Insert attached virtios into ADT 
Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
d94f918433 m1n1.adt: Add to_bus_addr() method 
So that one knows what to put in reg properties.

Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
6f460b1f6a m1n1.adt: Add create_node() method 
Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
2b33d7f801 m1n1.adt: Implement 'in' keyword on ADT nodes 
So that one can check for children, like:

  >>> "/arm-io/aic" in u.adt
  True

Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
0249d04a4b m1n1.adt: Add missing 'sys' import 
Used for sys.stderr later on.

Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Martin Povišer
6661ab14d0 hv: Add 9P virtio peripheral 
Add some minimal implementation of virtio peripherals. At the level
of on-target hypervisor code we implement the MMIO layout and
maintain virtqueues. Once a buffer is available, we break into the
host proxyclient to deal with it.

Specific device-classes of the virtio spec ought to be implemented in
the proxyclient. Here the one device implemented is 9P transport,
exporting the m1n1 source directory.

Signed-off-by: Martin Povišer <povik@cutebit.org>
 2023-01-13 17:25:25 +09:00
Hector Martin
586157b8bf experiments/smc_watcher.py: new experiment 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2022-12-26 15:07:52 +09:00
Sasha Finkelstein
8c2ad9ada6 Add z2 touch panel tracing 
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
 2022-12-24 20:45:19 +09:00
Asahi Lina
87fa247d9b m1n1.fw.agx.microsequence: Identify visibility_result_buffer field 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
9ebc38ca73 m1n1.trace.agx: Fix UAT TTBR PT size 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
1b9cb35104 experiments/agx_*.py: Autodetect FW version and GPU rev 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
2b0e022b78 m1n1.agx: Port rendering to G14 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
696cdee114 m1n1.agx.initdata: Port to G14G 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
80266ff93e m1n1.constructutils: Unify version conditional syntax with Rust 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
82a9bf3c26 hv/trace_agx_pwr.py: Cleanup 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
9360a92cdc m1n1/trace/agx.py: Add SGXTracer 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
0a57f45805 m1n1.hw.agx: Add chip info regs 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
e1752306c5 m1n1.fw.agx.initdata: Fix a bunch of fields 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
2dab8e352a m1n1.agx.render: Misc tiling related fixes 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
9e65bd527b experiments/agx_{parallel,renderframe}.py: Misc fixes 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
25e1644858 m1n1.adt: Add mtr-polynom-fuse-agx parsing 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
fbc04995ab tools/chainload.py: Fix chainloading of xnu 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
6e99fde8f2 hv/trace_all_more.py: Trace more stuff 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
10d772f743 hv/trace_agx_pwr.py: Messing with pstates 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
34b883318c m1n1.fw.agx.initdata: Make somethings Dec 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
e4810a452d m1n1.utils: Add align_pot() 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
7b63613945 m1n1.agx.render: Always enable Z compression 
This seems to be required on t600x...

Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
05ece42eba m1n1.agx.render: Better t600x support 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
bcd3d0274d m1n1.agx.initdata: Work out all the ADT relationships 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
d265abc90c m1n1.adt: Fixes for adding properties 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
808baf22df m1n1.agx: Initial T600x port 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:10 +09:00
Asahi Lina
5a73bd6476 hv/trace_agx_pwr.py: New HV experiment 
This is intended to reverse-engineer the macOS driver's power scale
calculations.

Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:17:07 +09:00
Asahi Lina
02d9fdc6a0 m1n1.trace.agx: Add after_init_hook 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
e50be4bf0d experiments/agx_tlb.py: Misc tracing changes 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
29ee0d5d32 m1n1.hv: Don't catch SystemExit from tracers/shells 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
b4d5ff7520 m1n1.agx: Add printing IRQs 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
2fe37d6dfa m1n1.fw.agx: Misc field renames & fixes 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
b4a19572f2 m1n1.fw.agx.handoff: Add CUR_CTX field 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
3aa2be6489 m1n1.hw.uat: Flushing cleanup 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
f92be5a076 experiments/agx_parallel.py: Uncomment some power-related tracers 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
f6dad68156 m1n1.fw.agx.initdata: Disable KTrace by default 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
20fce92280 m1n1.trace.agx: Disable some hex dumps 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
b8bf3f485e m1n1.trace.agx: Various UAT related improvements 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
a097e5b744 m1n1.trace.agx: Instantiate SGXRegs 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
621e7b535a m1n1.fw.agx: Misc structure tweaks 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
2978f246f2 m1n1.agx.render: PowerVR style tile param calculation 
Also document some other registers

Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
c72b6ce98c m1n1.hv: Translate DC CIVAC argument if trapped 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
633e551c2d m1n1.agx.object: Support reading back directly from physmem 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
bc99d3411a m1n1.agx.context: Fix blocklist indexing 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
5e39db820b m1n1.agx: Only try to decode fault if fault happened 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
1f28498b0a m1n1.hw.agx: Export R_FAULT_INFO 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
b8f9008953 m1n1.hw.uat: Show context ID in exceptions 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
b04cc0c7c8 m1n1.hw.uat: Document attribute indexes 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Asahi Lina
6a0008884d m1n1.agx: Add an initdata hook 
Signed-off-by: Asahi Lina <lina@asahilina.net>
 2022-12-04 13:15:55 +09:00
Hector Martin
9e2eeeb911 hv/trace_pmgr.py: Get rid of pwrgate stuff 
It's broken

Signed-off-by: Hector Martin <marcan@marcan.st>
 2022-12-04 13:10:59 +09:00
Janne Grunau
71baff4adc experiments/dcp.py: Set the display with surface swap 
Needs testing on DP/HDMI outputs.

Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
7d9608adc4 m1n1.fw.dcp.manager: Add backlight callbacks 
DCP reports the display brightness with
PropRelay::pr_publish(prop_id=15, value=...). The value divided by
"Brightness_scale" appears to be the display brightness in nits.
Add other callbacks encountered on j314c.

Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
6aa1da3c31 m1n1.fw.dcp.ipc: Annotate backlight fields in swap_rec 
Allows brightness control of integrated displays.

Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
98e8e48171 experiments/dcp.py: Add set_digital_out_mode call 
Initializes the display if not already done by iboot/m1n1. Not expected
to change anything for disp0 but might be helful in bringing DP alt
mode for dispexp[0-7].

Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
053eb7bfda experiments/dcp.py: Handle external displays correctly 
Pass disp0's comaptible string to DCPManager.
Fixes Mac Studio and M1 Macbook handling.

Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
452a3243c0 m1n1.fw.dcp.manager: Add SetDigitalOutMode convenience function 
This prints the selected modes. In addition omits printing the whole
DCPAVProps.

Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
dc3397888d m1n1.fw.dcp.manager: Add update_backlight_factor_prop call back 
Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
aa7088f3fb m1n1.fw.dcp.manager: Support 't600x' in rt_bandwidth_setup_ap 
Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Janne Grunau
e91cc63708 m1n1.fw.dcp.manager: Fix swap_complete_intent_gated after fb49d88d90 
Signed-off-by: Janne Grunau <j@jannau.net>
 2022-11-29 01:36:14 +09:00
Martin Povišer
de0c0323a5 experiments/mmio_sweep.py: Patch in AOP power-domains on t6000 
The ADT lacks some of the info on AOP power domains on t6000, so fill
that in manually.

Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
fc66046d76 experiments/aop.py: Extend AOP experiment, add tracer 
The AOP uses an 'EPIC' protocol similar to the one other coprocessor
firmware is using but not in the exact same version. Add code for
tracing the AOP calls and extend the aop.py experiment with the client
side of it. Include description of audio calls and some other calls
related to sensor discovery.

Furthermore, in experiments/aop.py, do some AOP audio setup. Once that
is done we can start streaming samples from the internal microphones by
making what AOP considers power state adjustment calls. That is, we
adjust the power state of a 'hpai' device, first to a 'pw1 ' stage,
then to 'pwrd' stage.

So, to see microphone samples, enter the AOP experiment shell first:

  $ M1N1DEVICE=/dev/ttyACM0 experiments/aop.py

Within the shell, adjust the power state of 'hpai':

  >>> aop_set_audio_pstate('hpai', 'pw1 ')

At that point /arm-io/admac-aop-audio powers up. In parallel to the AOP
shell, we can start tools/admac_stream.py on the just powered-up ADMAC
instance:

  $ M1N1HEAP=0x10010000000 M1N1DEVICE=/dev/ttyACM1 tools/admac_stream.py \
        --node admac-aop-audio --channel 1 -v | xxd -g 4 -c 12 -e

Returning back to the AOP shell, we can then set 'hpai' to 'pwrd' state
to kick off the streaming:

  >>> aop_set_audio_pstate('hpai', 'pwrd')

By that point, we should see samples coming out on the ADMAC end. The
samples are 32-bit floats packed in groups of three in a frame, e.g.

00000000: ba7ac6a7 ba32d3c3 baa17ae2  ..z...2..z..
0000000c: 38ccea5f b99c1a37 ba0c4bb1  _..87....K..
00000018: 39d2354f 3964b5ff 39b209fb  O5.9..d9...9
00000024: b96a1d1f 39c8503f 3958fc4f  ..j.?P.9O.X9
00000030: b6b1f5ff 39c72b8f 39bbe017  .....+.9...9
0000003c: 3a912de5 36dd4f7f 37f1147f  .-.:.O.6...7

This has been tested and will to some degree be specific to 2021 Macbook
Pro (t6000). Differences on other models TBD (at the very least the
number of microphones can be presumed different).

Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
a8ef753520 m1n1.fw.aop: In AOPBase only refer to ProxyUtils attribute 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
abd0c2ac3c m1n1.fw.aop: Tweak bootargs diff format 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
2bacc044e8 m1n1.fw.aop: Move bootargs helpers to new class AOPBase 
The new class can possibly be shared between the m1n1 AOP tracer and
AOP client.

Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
6ad59beb0c experiments/aop.py: Allocate oslog buffer on request 
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>
 2022-11-04 12:36:49 +09:00
Martin Povišer
f87d65a971 experiments/aop.py: Make _bootargs_span a property 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
1d2a157fe8 m1n1.fw.aop: Split off ASCArgumentSection from experiments/aop.py 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
79890a15d6 experiments/aop.py: Work around ADT inconsistencies 
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>
 2022-11-04 12:36:49 +09:00
Martin Povišer
b6ae985377 m1n1.fw.afk: Accept AOP buffer magic 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
8347301eff m1n1.hw.adt: Add prop parsing rules related to AOP audio 
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>
 2022-11-04 12:36:49 +09:00
Martin Povišer
fcf6170a9f m1n1.proxyutils: Accept M1N1HEAP environment variable 
Let user override the proxyutils heap base for concurrent running of two
proxyclient sessions.

Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
d735d6ad49 m1n1.hw.dart: Pass in kwargs arguments of from_adt() 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
9a93d5c307 m1n1.trace: Drop stale super().__init__() call 
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>
 2022-11-04 12:36:49 +09:00
Martin Povišer
c5e80f0d5a m1n1.fw.afk: Fix TX/RX_BUFSIZE confusion 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
ce517b10a3 tools/admac_stream.py: Add tool for engaging ADMAC 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
8ff430aefa m1n1.hw.admac: Add CHAN_SRAM_CARVEOUT registers 
The new registers contain SRAM limits allocated to each channel.

Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
1836913ef6 m1n1.utils: Accept 'base' in chexundump 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
e03603df35 m1n1.utils: Skip empty lines on chexundump input 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
Martin Povišer
f83af93c05 m1n1.utils: Fix chexundump exception 
Signed-off-by: Martin Povišer <povik@protonmail.com>
 2022-11-04 12:36:49 +09:00
R
9a23d55b83 scaler: Can scale W larger 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
642f3af5e8 scaler: Basic scaling kinda works 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
fc6378a86a scaler: Imports from RE 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
8cea72dfab scaler: clarify flip/rotate 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
a10865bf11 scaler: Understand most basic of w/h 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
31c80bca04 scaler: work out flip/rotate 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
7559de8705 scaler: Can copy data without changing 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
84e13c7967 scaler: add some unknown regs near the start 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
R
784febab4c scaler: initial commit 
Signed-off-by: R <rqou@berkeley.edu>
 2022-11-04 12:32:23 +09:00
Kellerman Rivero
404ab21fe4 hv/trace_isp.py: add ISP tracer 
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>
 2022-11-04 12:30:59 +09:00