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
..
acpi	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
asm-generic	asm-generic cleanups for 6.10	2024-05-20 15:18:34 -07:00
clocksource
crypto	This push fixes a bug in the new ecc P521 code as well as a buggy	2024-05-20 08:47:54 -07:00
drm	Short summary of fixes pull:	2024-05-27 13:47:14 +10:00
dt-bindings	- Core Frameworks	2024-05-22 10:49:54 -07:00
keys	Hi,	2024-05-13 10:40:15 -07:00
kunit	kunit: Print last test location on fault	2024-05-06 14:22:02 -06:00
kvm	Merge branch kvm-arm64/misc-6.10 into kvmarm-master/next	2024-05-08 16:41:50 +01:00
linux	Merge branch 'for-linus' into for-next	2024-06-26 22:11:13 +02:00
math-emu
media	media: cec.h: Fix kerneldoc	2024-05-04 10:19:59 +02:00
memory
misc
net	net: fix __dst_negative_advice() race	2024-05-29 17:34:49 -07:00
pcmcia
ras	tracing/treewide: Remove second parameter of __assign_str()	2024-05-22 20:14:47 -04:00
rdma	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
rv
scsi	SCSI misc on 20240514	2024-05-14 18:25:53 -07:00
soc	I'm actually surprised this time. There aren't any new Qualcomm SoC clk	2024-05-18 12:48:37 -07:00
sound	ALSA: pcm: reinvent the stream synchronization ID API	2024-07-02 09:53:21 +02:00
target
trace	block-6.10-20240523	2024-05-23 13:44:47 -07:00
uapi	ALSA: pcm: reinvent the stream synchronization ID API	2024-07-02 09:53:21 +02:00
ufs	Merge patch series "convert SCSI to atomic queue limits, part 1 (v3)"	2024-04-12 06:35:55 -04:00
vdso	vdso: Add vdso_data:: Max_cycles	2024-04-08 15:03:07 +02:00
video
xen