Hi, Current implementation of Linux FireWire subsystem doesn't allow unit driver to operate content of packet in IR context according to time stamp. Additionally it doesn't allow unit driver to read current value of CYCLE_TIME register in OHCI 1394 controller. It brings disadvantages to drivers in Linux sound subsystem in regards of handling time for sampled data such as PCM frames and MIDI messages. This rerolled patchset is first step to improve the situation. Changes in v2: * Rebase v1 patchset to v5.16 release V1: * https://lore.kernel.org/lkml/20211202113457.24011-1-o-takashi@xxxxxxxxxxxxx/ Hector Martin (1): firewire: Add dummy read_csr/write_csr functions Takashi Sakamoto (2): firewire: add kernel API to access CYCLE_TIME register firewire: add kernel API to access packet structure in request structure for AR context drivers/firewire/core-card.c | 39 +++++++++++++++++++++++++++++ drivers/firewire/core-cdev.c | 6 +++-- drivers/firewire/core-transaction.c | 18 +++++++++++++ include/linux/firewire.h | 3 +++ 4 files changed, 64 insertions(+), 2 deletions(-) -- 2.32.0
