Jaroslav Kysela f05c1ffc27 ALSA: pcm: reinvent the stream synchronization ID API ... Until the commit e11f0f90a6 ("ALSA: pcm: remove SNDRV_PCM_IOCTL1_INFO internal command"), there was a possibility to pass information about the synchronized streams to the user space. The mentioned commit removed blindly the appropriate code with an irrelevant comment. The revert may be appropriate, but since this API was lost for several years without any complains, it's time to improve it. The hardware parameters may change the used stream clock source (e.g. USB hardware) so move this synchronization ID to hw_params as read-only field. It seems that pipewire can benefit from this API (disable adaptive resampling for perfectly synchronized PCM streams) now. Note that the contents of ID is not supposed to be used for direct comparison with a specific byte sequence. The "empty" case is when all bytes are zero (driver does not offer this information) and all other cases must be only used for equal comparison among PCM streams (including different sound cards) if they are using identical hardware clock. Cc: Takashi Sakamoto <takaswie@kernel.org> Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20240625172836.589380-2-perex@perex.cz		2024-07-02 09:53:21 +02:00
..
asm-generic	mseal: wire up mseal syscall	2024-05-23 19:40:26 -07:00
drm	drm/nouveau: use tile_mode and pte_kind for VM_BIND bo allocations	2024-05-13 22:27:33 +02:00
linux	TTY fix for 6.10-rc2	2024-06-01 08:53:39 -07:00
misc	misc/pvpanic: add shutdown event definition	2024-04-11 15:12:10 +02:00
mtd	ubi: fastmap: Add control in 'UBI_IOCATT' ioctl to reserve PEBs for filling pools	2023-10-28 23:16:00 +02:00
rdma	RDMA/efa: Support QP with unsolicited write w/ imm. receive	2024-05-08 11:18:26 +03:00
regulator	uapi: regulator: Fix typo	2024-01-04 13:22:24 +00:00
scsi	SCSI misc on 20240514	2024-05-14 18:25:53 -07:00
sound	ALSA: pcm: reinvent the stream synchronization ID API	2024-07-02 09:53:21 +02:00
video
xen	xen/gntalloc: Replace UAPI 1-element array	2024-02-13 09:06:48 +01:00
Kbuild