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Add the A9 (S8003) G5P render driver used by the merged PowerVR/G5P Mesa winsys as kernel patches, enable it on J71t in the device tree, set CONFIG_DRM_APPLE_G5P=y for apple-16k, and add an install-time recipe that extracts the original META LDR (apple/agx-g5p-c0.ldr) from the device's own iOS kernelcache into /lib/firmware. No firmware is committed. The driver provides TYPED_V3 rendering, GEM buffers, VM/arena mappings, PRIME import/export, syncobj, bounded retirement and recovery. It does not expose the old compute or fixed-fixture ABI. Hardware: the exact kernel this derives from (brkosebay/linux a9/gpu-pr1 407b7bf2cbbe) booted on a J71t with the merged Mesa, rendered labwc on the GPU with KMS scanout at 60 Hz, and passed the G5P device rungs with zero GPU events. This Orchard adaptation itself has not yet been built by orchard or run on hardware. Assisted-by: LLM
kernel/configs/apple-16k/config: CONFIG_DRM_APPLE_G5P=y These options provide g5p and its Kconfig dependencies on both page sizes. Assisted-by: LLM
kernel/configs/apple-16k/config: CONFIG_APPLE_AOP_GYRO=m CONFIG_APPLE_AOP_PRESSURE=m These options provide aop and its Kconfig dependencies on both page sizes. Assisted-by: LLM
kernel/configs/apple-16k/config: # CONFIG_NVME_APPLE_ANS_EARLY_USB is not set These options provide warm-storage and its Kconfig dependencies on both page sizes. kernel/configs/apple-4k/config: # CONFIG_NVME_APPLE_ANS_EARLY_USB is not set These options provide warm-storage and its Kconfig dependencies on both page sizes. Assisted-by: LLM
Assisted-by: LLM
Assisted-by: LLM
Assisted-by: LLM
kernel/configs/apple-16k/config: CONFIG_APPLE_AOP_GYRO=m CONFIG_APPLE_AOP_PRESSURE=m These options provide aop and its Kconfig dependencies on both page sizes. Assisted-by: LLM
Assisted-by: LLM
kernel/configs/apple-16k/config: # CONFIG_NVME_APPLE_ANS_EARLY_USB is not set These options provide warm-storage and its Kconfig dependencies on both page sizes. kernel/configs/apple-4k/config: # CONFIG_NVME_APPLE_ANS_EARLY_USB is not set These options provide warm-storage and its Kconfig dependencies on both page sizes. Assisted-by: LLM
Assisted-by: LLM
Assisted-by: LLM
Assisted-by: LLM
Assisted-by: LLM
Bring this branch onto current main. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
A7-A9 have no EL2 and boot without any PSCI firmware, so Linux on an iPad 5 could not bring secondary CPUs down and up again, and a kexec had nowhere to park them. CPU hotplug, kexec and a clean poweroff all need a PSCI implementation that stays resident after m1n1 hands over. Carry m1n1 patches that keep a small EL3 PSCI implementation resident: CPU_ON/CPU_OFF with a firmware rendezvous (EL1 WFI/WFE trap to EL3), SYSTEM_OFF, and a guarded SYSTEM_RESET that boots the default entry again. The loader marks retained hardware in the device tree after a PSCI re-entry. The resident PSCI is on by default on these SoCs; the shipped boot framing keeps psci_reset=0, so SYSTEM_RESET stays off unless a loader enables it. Adds boot/m1n1/psci-loader and its tests. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
The A9 AOP hosts the accelerometer, gyroscope, pressure and ambient-light sensors. Its firmware needs boot arguments and per-device calibration that m1n1 did not pass on S8003, and a reloaded AOP (after kexec or sleep) lost its sensor firmware state, so the sensors did not come back. m1n1 passes the A9 AOP boot arguments and sensor calibration. The kernel selects a certified AOP reload path through device-tree match data (bindings, DT, mailbox, pmdomain, IIO and AOP driver patches), keeps the AOP power domain and firmware state for that reload, and refuses a suspend that would interrupt the firmware's boot. The J71t firmware recipe gains the AOP pieces, the gyroscope and pressure drivers are enabled, and J71t's accelerometer and gyroscope move from missing to working, and its light sensor from untested to working. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
The TriStar charger subscribed to the PMU's RTC event 16 for source identification. An acknowledgement there could take the RTC's wake event, and the polled cover inputs had no driver enabled. Give RTC event 16 to the RTC alone and keep the PMU and RTC event split (DT, RTC and USB patches), so one consumer's acknowledgement cannot take the other's wake event. Enable KEYBOARD_GPIO_POLLED for the polled cover inputs. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
On J71t the NVMe controller (ANS) sits behind the H9P PCIe port, and resetting that port loses the controller until a cold boot. A kexec therefore has to hand over a stopped but powered ANS, with its DART translations retained, or the next kernel loses its root filesystem. The first version of this handoff panicked when a step failed, which with panic=0 is an indefinite hang. Keep the certified ANS kexec handoff: DT and bindings describe it, the DART, H9P and NVMe drivers stop queues and translations in order and the next kernel picks them up, and core/printk export what the modules need. Every failure on the outgoing side now ends in a native cold reset through apple_cold_reset() instead of a panic, with explicit returns after it. The port is handed over powered, with PERST# asserted and the link stopped, and the incoming kernel brings it up with the cold-boot sequence (port power cycle, NVMe mode, port enable, then link training). Retraining the powered port by PERST# alone, as iOS never does, left the root port in Detect.Quiet and cost a timeout on every warm boot. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
After a kexec the next kernel found the S8000 GPIO controller with interrupt modes armed by the previous kernel, the PIO SPI controller with queued transfers and an asserted chip select, and the touch controller still running. An orphaned GPIO interrupt fires forever and touch did not come back. Retire inherited GPIO interrupt modes before the chained parent interrupts are enabled, drain and idle the S8000 PIO SPI controller on shutdown and at probe, and stop the Apple Z2 touch controller before its SPI parent shuts down. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
A Mac grants an iPad more than the standard USB current, but the charger took the gadget's reported budget unchecked and the composite gadget could draw the extra current while the bus was suspended. Cap and log the USB host budget in the TriStar charger, draw no extra Apple current while suspended, and let the initramfs and orchard USB helpers opt J71t into the Mac current profile. Documented in docs/bring-up/charging/j71t-mac-current.md, with tests. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
The USB serial number changed between installed boots and RAM sessions, so the host saw a new device every boot and could not keep its SSH known_hosts entry or serial console name. Share one BOARD/hashed-ID serial format between installed boots and RAM sessions (usb-identity), and get the per-boot SSH identity through the existing ACM console. Documented in docs/device-protocol.md, with tests. Assisted-by: LLM
Bring this branch onto current main and the series it depends on. The merge keeps the other side's tree; the next commit carries the reworked version of this branch's change.
A warm restart through kexec needs the next kernel to see the pristine device tree from boot, the pstore region, the display state and the power domains that must not be cut while the next kernel starts. DT, OF, DRM, pmdomain and pstore patches retain the board-selected warm handoff state, so probe and shutdown keep what the next kernel needs: the pristine boot device tree, the pstore region, the display state and the Apple pmgr warm hold. The Orchard service file learns the retained state. Assisted-by: LLM
Each render job paid a fixed host cost (serial submission, polling after events, uninterruptible VM binds), which capped frame rates well below the GPU's capacity. Account per-job GPU and host time, reduce serial job overhead, make VM binds killable and tune post-event polling, record joint latency, pipeline two render jobs deep, honour fragment-only waits, start the next job early during the 3D wait, gate TA PM records on dirty state, and default to the measured pipeline configuration. Assisted-by: LLM
The GPU blocked every system sleep, and an idle GPU kept its power on because the firmware was never allowed to park itself. Let the firmware self-park after bring-up and ring a parked firmware without the GPC settle wait. Implement a bounded retained system sleep: register the reservation as a suspend admission, hold clients across it, answer the readiness query, and refuse sleep with a named reason while work, a kexec power hold or pmgr's gfx hold is active. pmdomain ends the warm boot hold at sync_state, the gfx gate is cycled with auto-PM like pmgr-pwrstate, and the other admission users name their refusals too. Assisted-by: LLM
The VXD decoder only exposed H.264, so HEVC video was decoded on the CPU. Prepare the driver for a second coded format, add the HEVC command-stream builder and the stateless HEVC decoder, enable it on the S8000 and T8010 variants, and require a proven firmware stop before kexec. Adds the video_decode_hevc feature (working on J71t, untested on the other boards that have the driver, missing elsewhere). Assisted-by: LLM
S8000/S8003 left the SoC and memory performance state at the boot default, which bounds GPU throughput by memory bandwidth. Describe the SoC performance state in the binding and DT, run the SoC and memory at the high state while active, and restore the low state for sleep. Assisted-by: LLM
There was no way to measure memory bandwidth per port on A9, which is needed to tell GPU work from memory stalls. Add a binding, DT node and perf driver for the A9 AMC port monitor, exposing CPU and GFX read/write byte counters, and enable it for apple-16k. Assisted-by: LLM
Contributor
|
Thanks for this. We're not taking the memory port counters for now: they're a developer measurement tool with no user-facing feature behind them yet, A9-only, and the CPU write counts are still uncalibrated. The code is kept as tag |
brkosebay
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Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117.
brkosebay
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Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in drivers/usb are renumbered to follow main's.
brkosebay
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Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, drivers/base and drivers/usb are renumbered to follow main's.
brkosebay
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Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, drivers/base and drivers/usb are renumbered to follow main's.
brkosebay
added a commit
to brkosebay/hardware
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this pull request
Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, drivers/base, drivers/pmdomain and drivers/usb are renumbered to follow main's.
brkosebay
added a commit
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that referenced
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Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, drivers/base, drivers/pmdomain and drivers/usb are renumbered to follow main's.
brkosebay
added a commit
to brkosebay/hardware
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this pull request
Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, devices/t8010, drivers/base, drivers/media, drivers/pmdomain, drivers/power and drivers/usb are renumbered to follow main's. Main's versions apply first now, so 0011 in drivers/media keep their change with a diff regenerated for the new context.
brkosebay
added a commit
to brkosebay/hardware
that referenced
this pull request
Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, devices/s8003, devices/t8010, drivers/base, drivers/media, drivers/pmdomain, drivers/power and drivers/usb are renumbered to follow main's. Main's versions apply first now, so 0011 in drivers/media keep their change with a diff regenerated for the new context.
brkosebay
added a commit
to brkosebay/hardware
that referenced
this pull request
Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, devices/s8003, devices/t8010, drivers/base, drivers/media, drivers/pmdomain, drivers/power and drivers/usb are renumbered to follow main's. Main's versions apply first now, so 0011 in drivers/media keep their change with a diff regenerated for the new context.
brkosebay
added a commit
to brkosebay/hardware
that referenced
this pull request
Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, devices/s8003, devices/t8010, drivers/base, drivers/media, drivers/pmdomain, drivers/power, drivers/soc-apple and drivers/usb are renumbered to follow main's. Main's versions apply first now, so 0011 in drivers/media keep their change with a diff regenerated for the new context.
brkosebay
added a commit
to brkosebay/hardware
that referenced
this pull request
Nov 13, 2026
Bring this branch onto current main. Main has since merged OrchardLinux#124, OrchardLinux#122, OrchardLinux#118, OrchardLinux#121, OrchardLinux#110, OrchardLinux#127, OrchardLinux#101, OrchardLinux#126, OrchardLinux#108 and OrchardLinux#111, several in part or reworked, and OrchardLinux#123 and OrchardLinux#128 were closed. Where main carries a topic, main's version is kept; the left-out parts that warm restart and suspend need come back in OrchardLinux#107 and OrchardLinux#117. This branch's own patches in devices/s8000, devices/s8003, devices/t8010, drivers/base, drivers/media, drivers/pmdomain, drivers/power, drivers/soc-apple and drivers/usb are renumbered to follow main's. Main's versions apply first now, so 0011 in drivers/media keep their change with a diff regenerated for the new context.
This was referenced Nov 13, 2026
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Part 17 of 23 of the iPad 5 (J71t) series in this repository; merge after #122.
Problem
There was no way to measure memory bandwidth per port on A9, which is needed to tell GPU work from memory stalls.
Change
Add a binding, DT node and perf driver for the A9 AMC port monitor, exposing CPU and GFX read/write byte counters, and enable it for apple-16k.
Testing
Dependencies
Depends on #122.
This branch is stacked on the PRs it depends on and carries their commits; the change of this PR is its last commit, "perf: apple: A9 memory port byte counters".
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