linux/Documentation
Thomas Zimmermann 6dd7b6ce43 drm: Add additional atomic helpers for shadow-buffered planes
Several drivers use GEM buffer objects as shadow buffers for the actual
framebuffer memory. Right now, drivers do these vmap operations in their
commit tail, which is actually not allowed by the locking rules for
the dma-buf reservation lock. The involved BO has to be vmapped in the
plane's prepare_fb callback and vunmapped in cleanup_fb.

This patch introduces atomic helpers for such shadow planes. Plane
functions manage the plane state for shadow planes. The provided
implementations for prepare_fb and cleanup_fb vmap and vunmap all BOs of
struct drm_plane_state.fb. The mappings are afterwards available in the
plane's commit-tail functions.

For now, all rsp drivers use the simple KMS helpers, so we add the plane
callbacks and wrappers for simple KMS. The internal plane functions can
later be exported as needed.

v3:
	* documentation fixes
v2:
	* make duplicate_state interface compatible with
	  struct drm_plane_funcs

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210208115538.6430-4-tzimmermann@suse.de
2021-02-08 13:00:14 +01:00
..
ABI More power management updates for 5.11-rc1 2020-12-22 14:12:10 -08:00
accounting
admin-guide A small set of late-arriving, small documentation fixes. 2020-12-24 14:20:33 -08:00
arm ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
arm64 ARM: 2020-12-20 10:44:05 -08:00
block
bpf
cdrom
core-api Generic interrupt and irqchips subsystem: 2020-12-15 15:03:31 -08:00
cpu-freq
crypto
dev-tools Merge branch 'akpm' (patches from Andrew) 2020-12-22 13:38:17 -08:00
devicetree dt-binding: display: bcm2711-hdmi: Add CEC and hotplug interrupts 2021-01-28 10:29:28 +01:00
doc-guide kernel-doc: Fix example in Nested structs/unions 2020-12-08 10:23:17 -07:00
driver-api RTC for 5.11 2020-12-20 10:12:06 -08:00
fault-injection
fb
features ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
filesystems Various bug fixes and cleanups for ext4; no new features this cycle. 2020-12-24 14:16:02 -08:00
firmware_class
firmware-guide Documentation: ACPI: enumeration: add PCI hierarchy representation 2020-11-23 17:59:49 +01:00
fpga
gpu drm: Add additional atomic helpers for shadow-buffered planes 2021-02-08 13:00:14 +01:00
hid Merge branch 'for-5.11/core' into for-linus 2020-12-16 11:38:38 +01:00
hwmon hwmon: (sbtsi) Add documentation 2020-12-12 08:34:29 -08:00
i2c
ia64 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
ide
iio
infiniband
input Input: document inhibiting 2020-12-02 22:10:37 -08:00
isdn
kbuild Kconfig updates for v5.11 2020-12-22 14:04:25 -08:00
kernel-hacking
leds Changes for 5.11-rc1. Small cleanups/fixes mostly thanks to Marek, 2020-12-16 14:56:29 -08:00
litmus-tests
livepatch
locking Documentation: seqlock: s/LOCKTYPE/LOCKNAME/g 2020-12-09 17:08:49 +01:00
m68k docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
maintainer
mhi
mips docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
misc-devices
netlabel
networking ARM: SoC drivers for v5.11 2020-12-16 16:38:41 -08:00
nios2 docs: nios2: add missing ReST file 2020-12-07 08:35:21 -07:00
nvdimm
openrisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
parisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
PCI
pcmcia
power
powerpc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
process A small set of late-arriving, small documentation fixes. 2020-12-24 14:20:33 -08:00
RCU
riscv docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
s390 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
scheduler Power management updates for 5.11-rc1 2020-12-15 16:30:31 -08:00
scsi
security
sh docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sound ALSA: usb-audio: Add implicit_fb module option 2020-11-23 15:17:24 +01:00
sparc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sphinx Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
sphinx-static
spi
staging
target tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
timers
trace Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
translations Networking updates for 5.11 2020-12-15 13:22:29 -08:00
usb
userspace-api "Intel SGX is new hardware functionality that can be used by 2020-12-14 13:14:57 -08:00
virt ARM: 2020-12-20 10:44:05 -08:00
vm mm/lru: revise the comments of lru_lock 2020-12-15 14:48:04 -08:00
w1
watchdog
x86 A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
xtensa A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
.gitignore
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py docs: Note that sphinx 1.7 will be required soon 2020-12-11 13:53:38 -07:00
COPYING-logo
docutils.conf
dontdiff
index.rst docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
Kconfig
logo.gif
Makefile
memory-barriers.txt
SubmittingPatches
watch_queue.rst