kernel/linux.git/drivers/soc/apple, branch v6.18.21

soc: apple: mailbox: fix device leak on lookup

2026-01-02T11:57:29+00:00

commit f401671e90ccc26b3022f177c4156a429c024f6c upstream. Make sure to drop the reference taken to the mbox platform device when looking up its driver data. Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference. Fixes: 6e1457fcad3f ("soc: apple: mailbox: Add ASC/M3 mailbox driver") Cc: stable@vger.kernel.org # 6.8 Signed-off-by: Johan Hovold Reviewed-by: Neal Gompa Signed-off-by: Sven Peter Signed-off-by: Greg Kroah-Hartman

soc: apple: sart: Add SARTv0 support

2025-09-06T08:02:52+00:00

Add support for SARTv0 as found on Apple A11 SoC. Reviewed-by: Sven Peter Signed-off-by: Nick Chan Link: https://lore.kernel.org/r/20250821-t8015-nvme-v3-5-14a4178adf68@gmail.com Signed-off-by: Sven Peter

soc: apple: sart: Make allow flags SART version dependent

2025-09-06T08:02:51+00:00

SART versions that uses different allow flags will be added. Reviewed-by: Sven Peter Signed-off-by: Nick Chan Link: https://lore.kernel.org/r/20250821-t8015-nvme-v3-4-14a4178adf68@gmail.com Signed-off-by: Sven Peter

soc: apple: mailbox: Add Apple A11 and T2 mailbox support

2025-08-23T07:25:15+00:00

Add ASC mailbox support for Apple A11 and T2 SoCs, which is used for coprocessors in the system. Reviewed-by: Sven Peter Signed-off-by: Nick Chan Link: https://lore.kernel.org/r/20250821-t8015-nvme-v3-2-14a4178adf68@gmail.com Signed-off-by: Sven Peter

soc: apple: Drop default ARCH_APPLE in Kconfig

2025-08-10T18:28:36+00:00

When the first driver for Apple Silicon was upstreamed we accidentally included `default ARCH_APPLE` in its Kconfig which then spread to almost every subsequent driver. As soon as ARCH_APPLE is set to y this will pull in many drivers as built-ins which is not what we want. Thus, drop `default ARCH_APPLE` from Kconfig. Reviewed-by: Janne Grunau Link: https://lore.kernel.org/r/20250612-apple-kconfig-defconfig-v1-2-0e6f9cb512c1@kernel.org Signed-off-by: Sven Peter

soc: apple: rtkit: Make shmem_destroy optional

2025-07-24T08:47:33+00:00

shmem_destroy isn't always required for coprocessor-managed buffers but we still enforce that it exists. Just relax the check. Reviewed-by: Alyssa Rosenzweig Reviewed-by: Neal Gompa Signed-off-by: Sven Peter Link: https://lore.kernel.org/r/20250610-smc-6-15-v7-4-556cafd771d3@kernel.org Signed-off-by: Lee Jones

soc: apple: rtkit: Cut syslog messages after the first '\0'

2025-02-28T21:36:45+00:00

Certain messages from DCP contain NUL bytes in the random data after the NUL terminated syslog message. Since the syslog message ends with '\n' this results in a dev_info() message terminated with two newlines and an empty printed line in the kernel log. Signed-off-by: Janne Grunau Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-4-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter

soc: apple: rtkit: Use high prio work queue

2025-02-28T21:36:45+00:00

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

soc: apple: rtkit: Implement OSLog buffers properly

2025-02-28T21:36:45+00:00

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

soc: apple: rtkit: Add and use PWR_STATE_INIT instead of _ON

2025-02-28T21:36:45+00:00

This state is needed to wake the dcp IOP after m1n1 shut it down and works for all other co-processors as well. Signed-off-by: Janne Grunau Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-1-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter