Laurent Pinchart 3056a8e936 media: media-entity: Simplify media_pipeline_start() ... The media_pipeline_start() function has two purposes: it constructs a pipeline by recording the entities that are part of it, gathered from a graph walk, and validate the media links. The pipeline pointer is stored in the media_entity structure as part of this process, and the entity's stream count is increased, to record that the entity is streaming. When multiple video nodes are present in a pipeline, media_pipeline_start() is typically called on all of them, with the same pipeline pointer. This is taken into account in media_pipeline_start() by skipping validation for entities that are already part of the pipeline, while returning an error if an entity is part of a different pipeline. It turns out that this process is overly complicated. When media_pipeline_start() is called for the first time, it constructs the full pipeline, adding all entities and validating all the links. Subsequent calls to media_pipeline_start() are then nearly no-ops, they only increase the stream count on the pipeline and on all entities. The media_entity stream_count field is used for two purposes: checking if the entity is streaming, and detecting when a call to media_pipeline_stop() balances needs to reset the entity pipe pointer to NULL. The former can easily be replaced by a check of the pipe pointer. Simplify media_pipeline_start() by avoiding the pipeline walk on all calls but the first one, and drop the media_entity stream_count field. media_pipeline_stop() is updated accordingly. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [Sakari Ailus: Drop redundant '!= NULL' as discussed] Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>		2022-03-04 00:27:06 +02:00
..
accessibility	Char/Misc and other driver changes for 5.17-rc1	2022-01-14 16:02:28 +01:00
acpi	Merge branch 'akpm' (patches from Andrew)	2022-01-22 11:28:23 +02:00
amba
android
ata	ata: pata_octeon_cf: fix call to trace_ata_bmdma_stop()	2022-01-21 18:39:16 +09:00
atm	atm: iphase: remove redundant pointer skb	2022-01-13 12:50:48 +00:00
auxdisplay
base	firmware_loader: move firmware sysctl to its own files	2022-01-22 08:33:35 +02:00
bcma
block	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
bluetooth	virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes	2022-01-18 10:05:48 +02:00
bus	pci-v5.17-changes	2022-01-16 08:08:11 +02:00
cdrom	cdrom: simplify subdirectory registration with register_sysctl()	2022-01-22 08:33:35 +02:00
char	random: move the random sysctl declarations to its own file	2022-01-22 08:33:35 +02:00
clk	Some hot fixes for clk driver patches merged last week	2022-01-21 09:16:11 +02:00
clocksource	- Refactor resource allocation on the Exynos_mct driver without	2022-01-10 13:53:16 +01:00
comedi
connector
counter	counter: 104-quad-8: Fix use-after-free by quad8_irq_handler	2022-01-06 15:51:13 +01:00
cpufreq	cpufreq: amd-pstate: Fix Kconfig dependencies for AMD P-State	2022-01-06 18:31:33 +01:00
cpuidle	cpuidle: use default_groups in kobj_type	2022-01-05 18:31:17 +01:00
crypto	virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes	2022-01-18 10:05:48 +02:00
cxl	cxl/core: Remove cxld_const_init in cxl_decoder_alloc()	2022-01-04 17:29:31 -08:00
dax	Merge branch 'akpm' (patches from Andrew)	2022-01-15 20:37:06 +02:00
dca
devfreq
dio
dma	dmaengine updates for v5.17-rc1	2022-01-18 14:03:34 +02:00
dma-buf	drm fixes for 5.17-rc1:	2022-01-16 06:52:38 +02:00
edac	- Add support for version 3 of the Synopsys DDR controller to synopsys_edac	2022-01-10 11:45:23 -08:00
eisa
extcon
firewire
firmware	RISC-V: Introduce sv48 support without relocatable kernel	2022-01-19 19:37:44 -08:00
fpga
fsi
gnss
gpio	gpio fixes for v5.17-rc1	2022-01-20 17:38:23 +02:00
gpu	media: v4l2-mediabus: Use structures to describe bus configuration	2022-02-17 09:51:23 +01:00
greybus
hid	HID: wacom: Avoid using stale array indicies to read contact count	2022-01-21 15:10:02 +01:00
hsi
hv	hyperv-next for 5.17	2022-01-16 15:53:00 +02:00
hwmon	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
hwspinlock
hwtracing
i2c	virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes	2022-01-18 10:05:48 +02:00
i3c	i3c: master: dw: check return of dw_i3c_master_get_free_pos()	2022-01-13 02:05:50 +01:00
idle
iio	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
infiniband	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2022-01-17 08:27:55 +02:00
interconnect
iommu	media: iommu/mediatek: Add device_link between the consumer and the larb devices	2022-01-28 15:30:21 +01:00
ipack
irqchip	Rework of the MSI interrupt infrastructure:	2022-01-13 09:05:29 -08:00
isdn
leds	LED updates for 5.17. Nothing major is happening here.	2022-01-12 16:59:22 -08:00
macintosh	macintosh/mac_hid.c: simplify subdirectory registration with register_sysctl()	2022-01-22 08:33:35 +02:00
mailbox	- qcom: misc updates to qcom-ipcc driver	2022-01-13 11:19:07 -08:00
mcb
md	dax + libnvdimm for v5.17	2022-01-12 15:46:11 -08:00
media	media: media-entity: Simplify media_pipeline_start()	2022-03-04 00:27:06 +02:00
memory	media: memory: mtk-smi: Get rid of mtk_smi_larb_get/put	2022-01-28 15:30:21 +01:00
memstick
message	scsi: message: fusion: mptctl: Use dma_alloc_coherent()	2022-01-10 10:33:52 -05:00
mfd	driver core changes for 5.17-rc1	2022-01-12 11:11:34 -08:00
misc	pci-v5.17-changes	2022-01-16 08:08:11 +02:00
mmc	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
most
mtd	- added support for more BCM47XX based devices	2022-01-14 15:08:36 +01:00
mux
net	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
nfc	nfc: st21nfca: Fix potential buffer overflows in EVT_TRANSACTION	2022-01-12 14:17:45 +00:00
ntb	New AMD PCI ID for NTB, and a number of bug fixes for ntb_hw_switchtec	2022-01-17 08:14:18 +02:00
nubus	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
nvdimm	virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes	2022-01-18 10:05:48 +02:00
nvme	for-5.17/drivers-2022-01-11	2022-01-12 10:35:23 -08:00
nvmem
of	Devicetree fixes for v5.17, take 1:	2022-01-22 09:52:17 +02:00
opp
parisc	Merge branch 'akpm' (patches from Andrew)	2022-01-22 11:28:23 +02:00
parport
pci	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
pcmcia	pci-v5.17-changes	2022-01-16 08:08:11 +02:00
perf	Rework of the MSI interrupt infrastructure:	2022-01-13 09:05:29 -08:00
phy	Char/Misc and other driver changes for 5.17-rc1	2022-01-14 16:02:28 +01:00
pinctrl	Pin control bulk changes for the v5.17 kernel cycle	2022-01-12 10:56:08 -08:00
platform	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
pnp	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
power	platform-drivers-x86 for v5.17-1	2022-01-11 11:26:57 -08:00
powercap
pps
ps3
ptp	net: fix SOF_TIMESTAMPING_BIND_PHC to work with multiple sockets	2022-01-06 12:18:08 +00:00
pwm	pwm: Changes for v5.17-rc1	2022-01-20 13:25:01 +02:00
rapidio
ras
regulator	regulator: Add MAX20086-MAX20089 driver	2022-01-07 13:36:35 +00:00
remoteproc	remoteproc: stm32: Improve crash recovery time	2022-01-03 11:40:45 -07:00
reset	SoC: Add support for StarFive JH7100 RISC-V SoC	2022-01-10 08:32:37 -08:00
rpmsg	virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes	2022-01-18 10:05:48 +02:00
rtc	rtc: sunplus: fix return value in sp_rtc_probe()	2022-01-16 23:50:34 +01:00
s390	dax + libnvdimm for v5.17	2022-01-12 15:46:11 -08:00
sbus
scsi	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
sh
siox
slimbus
soc	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
soundwire	Char/Misc and other driver changes for 5.17-rc1	2022-01-14 16:02:28 +01:00
spi	sound updates for 5.17-rc1	2022-01-14 14:55:38 +01:00
spmi
ssb
staging	media: staging: media: imx: imx7_mipi_csis: Store colorspace in set_fmt as well	2022-02-17 10:26:19 +01:00
target
tc
tee	ARM: SoC driver updates for v5.17	2022-01-10 08:13:52 -08:00
thermal	thermal: int340x: Add Raptor Lake PCI device id	2022-01-17 19:48:07 +01:00
thunderbolt
tty	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
uio
usb	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
vdpa	virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes	2022-01-18 10:05:48 +02:00
vfio	VFIO updates for v5.17-rc1	2022-01-20 13:31:46 +02:00
vhost	vdpa: Protect vdpa reset with cf_mutex	2022-01-14 18:50:54 -05:00
video	drm fixes for 5.17-rc1:	2022-01-16 06:52:38 +02:00
virt	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
virtio	vdpa: Allow to configure max data virtqueues	2022-01-14 18:50:53 -05:00
visorbus
vlynq
vme
w1
watchdog	linux-watchdog 5.17-rc1 tag	2022-01-17 08:07:57 +02:00
xen	arm/xen: Read extended regions from DT and init Xen resource	2022-01-06 09:53:41 +01:00
zorro	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
Kconfig
Makefile