Re: [PATCH 0/9] firewire: core: add fw_iso_context() variant with configurable isoc header size

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