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Thomas Zimmermann dbbf933d36 drm/atomic-helper: Don't allocate new plane state in CRTC check 
In drm_atomic_helper_check_crtc_state(), do not add a new plane state
to the global state if it does not exist already. Adding a new plane
state will result in overhead for the plane during the atomic-commit
step.

For the test in drm_atomic_helper_check_crtc_state() to succeed, it
is important that the CRTC has an enabled primary plane after the
commit. Simply testing the CRTC state's plane_mask for a primary plane
is sufficient.

Note that the helper still only tests for an attached primary plane.
Drivers have to ensure that the plane contains valid pixel information.

v5:
	* fix commit description (Javier)
v3:
	* test for a primary plane in plane_mask (Ville)
v2:
	* remove unnecessary test for plane->crtc (Ville)
	* inline drm_atomic_get_next_plane_state() (Ville)
	* acquire plane lock before accessing plane->state (Ville)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Fixes: d6b9af1097 ("drm/atomic-helper: Add helper drm_atomic_helper_check_crtc_state()")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/20221007124338.24152-2-tzimmermann@suse.de
2022-10-08 15:26:45 +02:00
arch Misc irqchip fixes: LoongArch driver fixes and a Hyper-V IOMMU fix. 2022-08-21 15:09:55 -07:00
block block-6.0-2022-08-19 2022-08-20 10:17:05 -07:00
certs
crypto
Documentation dt-bindings: display: simple: Add Multi-Inno Technology MI0800FT-9 panel 2022-09-29 16:05:23 +02:00
drivers drm/atomic-helper: Don't allocate new plane state in CRTC check 2022-10-08 15:26:45 +02:00
fs 5 cifs/smb3 fixes, one for stable 2022-08-21 10:21:16 -07:00
include drm/fourcc: add Vivante tile status modifiers 2022-10-06 19:04:20 +02:00
init asm goto: eradicate CC_HAS_ASM_GOTO 2022-08-21 10:06:28 -07:00
io_uring io_uring/net: use right helpers for async_data 2022-08-18 07:27:20 -06:00
ipc
kernel Various fixes for tracing: 2022-08-21 14:49:42 -07:00
lib lib/cpumask: drop always-true preprocessor guard 2022-08-15 11:00:44 -07:00
LICENSES
mm
net tcp: handle pure FIN case correctly 2022-08-18 11:04:56 -07:00
samples
scripts asm goto: eradicate CC_HAS_ASM_GOTO 2022-08-21 10:06:28 -07:00
security hardening fixes for v6.0-rc2 2022-08-19 13:56:14 -07:00
sound sound fixes for 6.0-rc2 2022-08-19 09:46:11 -07:00
tools asm goto: eradicate CC_HAS_ASM_GOTO 2022-08-21 10:06:28 -07:00
usr
virt KVM: Drop unnecessary initialization of "ops" in kvm_ioctl_create_device() 2022-08-19 04:05:43 -04:00
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MAINTAINERS Immutable backlight-detect-refactor branch between acpi, drm-* and pdx86 2022-09-14 12:27:10 +01:00
Makefile Linux 6.0-rc2 2022-08-21 17:32:54 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.