kernel/linux.git/drivers/soc/apple, branch v6.1.168

soc: apple: rtkit: Implement OSLog buffers properly

2025-06-04T12:40:10+00:00

[ Upstream commit a06398687065e0c334dc5fc4d2778b5b87292e43 ] Apparently nobody can figure out where the old logic came from, but it seems like it has never been actually used on any supported firmware to this day. OSLog buffers were apparently never requested. But starting with 13.3, we actually need this implemented properly for MTP (and later AOP) to work, so let's actually do that. Signed-off-by: Hector Martin Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-2-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter Signed-off-by: Sasha Levin

soc: apple: rtkit: Use high prio work queue

2025-06-04T12:40:10+00:00

[ Upstream commit 22af2fac88fa5dbc310bfe7d0b66d4de3ac47305 ] rtkit messages as communication with the DCP firmware for framebuffer swaps or input events are time critical so use WQ_HIGHPRI to prevent user space CPU load to increase latency. With kwin_wayland 6's explicit sync mode user space load was able to delay the IOMFB rtkit communication enough to miss vsync for surface swaps. Minimal test scenario is constantly resizing a glxgears Xwayland window. Signed-off-by: Janne Grunau Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-3-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter Signed-off-by: Sasha Levin

soc: apple: rtkit: Stop casting function pointer signatures

2022-12-31T12:31:53+00:00

[ Upstream commit 5acf07ff25f0c1c44105e6b8ebf88c55a0a04d2f ] Fixes: 9bd1d9a0d8bb ("soc: apple: Add RTKit IPC library") Reported-by: kernel test robot Signed-off-by: Sven Peter Signed-off-by: Hector Martin Signed-off-by: Sasha Levin

soc: apple: sart: Stop casting function pointer signatures

2022-12-31T12:31:53+00:00

[ Upstream commit 422d0b860dc223b5dfc6d083697cae258bb5a4a1 ] Fixes: b170143ae111 ("soc: apple: Add SART driver") Reported-by: kernel test robot Signed-off-by: Sven Peter Signed-off-by: Hector Martin Signed-off-by: Sasha Levin

soc: apple: rtkit: Add apple_rtkit_poll

2022-09-17T17:53:29+00:00

This allows a client to receive messages in atomic context, by polling. Signed-off-by: Hector Martin Signed-off-by: Russell King (Oracle) Reviewed-by: Sven Peter Reviewed-by: Eric Curtin Reviewed-by: Linus Walleij Signed-off-by: Arnd Bergmann

soc: apple: Add SART driver

2022-05-02T15:24:45+00:00

The NVMe co-processor on the Apple M1 uses a DMA address filter called SART for some DMA transactions. This adds a simple driver used to configure the memory regions from which DMA transactions are allowed. Unlike a real IOMMU, SART does not support any pagetables and can't be implemented inside the IOMMU subsystem using iommu_ops. It also can't be implemented using dma_map_ops since not all DMA transactions of the NVMe controller are filtered by SART. Instead, most buffers have to be registered using the integrated NVMe IOMMU and we can't have two separate dma_map_ops implementations for a single device. Co-developed-by: Hector Martin Reviewed-by: Arnd Bergmann Signed-off-by: Hector Martin Signed-off-by: Sven Peter

soc: apple: Add RTKit IPC library

2022-05-01T14:55:06+00:00

Apple SoCs such as the M1 come with multiple embedded co-processors running proprietary firmware. Communication with those is established over a simple mailbox using the RTKit IPC protocol. This cannot be implemented inside the mailbox subsystem since on top of communication over channels we also need support for starting, hibernating and resetting these co-processors. We also need to handle shared memory allocations differently depending on the co-processor and don't want to split that across multiple drivers. Reviewed-by: Arnd Bergmann Signed-off-by: Sven Peter

soc: apple: apple-pmgr-pwrstate: Do not build as a module

2021-12-15T11:36:05+00:00

This doesn't make any sense as a module since it is a critical device, and it turns out of_phandle_iterator_args was not exported so the module version doesn't build anyway. Fixes: 6df9d38f9146 ("soc: apple: Add driver for Apple PMGR power state controls") Reported-by: kernel test robot Reviewed-by: Sven Peter Signed-off-by: Hector Martin

soc: apple: apple-pmgr-pwrstate: Add auto-PM min level support

2021-12-12T01:32:10+00:00

This is seemingly required for DCP/DCPEXT, without which they refuse to boot properly. They need to be set to minimum state 4 (clock gated). Reviewed-by: Sven Peter Signed-off-by: Hector Martin

soc: apple: Add driver for Apple PMGR power state controls

2021-12-07T04:13:13+00:00

Implements genpd and reset providers for downstream devices. Each instance of the driver binds to a single register and represents a single SoC power domain. The driver does not currently implement all features (clockgate-only state, misc flags), but we declare the respective registers for documentation purposes. These features will be added as they become useful for downstream devices. This also creates the apple/soc tree and Kconfig submenu. Acked-by: Linus Walleij Signed-off-by: Hector Martin