Hi,
On Sat, Jan 17, 2026 at 11:28:13PM +0900, Takashi Sakamoto wrote:
> Hi,
>
> Currently ALSA IEC 61883-1/6 packet streaming engine provides the maximum
> PCM buffer size constraints to drivers for audio and music units in
> IEEE 1394 bus, due to hard-coded size of isochronous context header for
> 1394 OHCI IR context.
>
> The limitation is inconvenient a bit, and this patchset removes it by
> allowing the drivers to configure the size of isochronous context
> header.
>
> To sound subsystem maintainer, I'd like to send the last patch to
> mainline in my side.
>
> Takashi Sakamoto (9):
> firewire: core: add function variants for isochronous context creation
> firewire: ohci: refactor isoc single-channel state using a union
> firewire: ohci: code refactoring to use union for isoc multiple
> channel state
> firewire: ohci: use cleanup helper for isoc context header allocation
> firewire: core: add flags member for isochronous context structure
> firewire: ohci: allocate isoc context header by kvmalloc()
> firewire: core: provide isoc header buffer size outside card driver
> firewire: core: add fw_iso_context_create() variant with header
> storage size
> ALSA: firewire: remove PCM buffer size constraint from isoc context
> header
>
> drivers/firewire/core-card.c | 4 +-
> drivers/firewire/core-cdev.c | 30 ++--------
> drivers/firewire/core-iso.c | 16 ++---
> drivers/firewire/core.h | 13 +++-
> drivers/firewire/ohci.c | 110 +++++++++++++++++++---------------
> include/linux/firewire.h | 33 ++++++++--
> sound/firewire/amdtp-stream.c | 31 +++-------
> 7 files changed, 125 insertions(+), 112 deletions(-)
Applied to for-next branch.
Regards
Takashi Sakamoto