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Dave Stevenson 5044e5f251 drm/bridge: Introduce pre_enable_prev_first to alter bridge init order 
[ Upstream commit 4fb912e5e1 ]

DSI sink devices typically want the DSI host powered up and configured
before they are powered up. pre_enable is the place this would normally
happen, but they are called in reverse order from panel/connector towards
the encoder, which is the "wrong" order.

Add a new flag pre_enable_prev_first that any bridge can set
to swap the order of pre_enable (and post_disable) for that and the
immediately previous bridge.
Should the immediately previous bridge also set the
pre_enable_prev_first flag, the previous bridge to that will be called
before either of those which requested pre_enable_prev_first.

eg:
- Panel
- Bridge 1
- Bridge 2 pre_enable_prev_first
- Bridge 3
- Bridge 4 pre_enable_prev_first
- Bridge 5 pre_enable_prev_first
- Bridge 6
- Encoder
Would result in pre_enable's being called as Panel, Bridge 1, Bridge 3,
Bridge 2, Bridge 6, Bridge 5, Bridge 4, Encoder.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20221205173328.1395350-5-dave.stevenson@raspberrypi.com
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Stable-dep-of: dd9e329af7 ("drm/bridge: ti-sn65dsi83: Fix enable/disable flow to meet spec")
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-07-19 16:21:23 +02:00
arch arm64: dts: qcom: apq8016-sbc: Fix 1.8V power rail on LS expansion 2023-07-19 16:21:23 +02:00
block block: fix blktrace debugfs entries leakage 2023-07-19 16:20:58 +02:00
certs
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-06-09 10:34:28 +02:00
Documentation docs: Set minimal gtags / GNU GLOBAL version to 6.6.5 2023-07-05 18:27:38 +01:00
drivers drm/bridge: Introduce pre_enable_prev_first to alter bridge init order 2023-07-19 16:21:23 +02:00
fs ocfs2: Fix use of slab data with sendpage 2023-07-19 16:21:13 +02:00
include drm/bridge: Introduce pre_enable_prev_first to alter bridge init order 2023-07-19 16:21:23 +02:00
init gcc: disable '-Warray-bounds' for gcc-13 too 2023-04-26 14:28:43 +02:00
io_uring io_uring/net: use the correct msghdr union member in io_sendmsg_copy_hdr 2023-06-28 11:12:33 +02:00
ipc
kernel kexec: fix a memory leak in crash_shrink_memory() 2023-07-19 16:21:08 +02:00
lib lib/ts_bm: reset initial match offset for every block of text 2023-07-19 16:21:13 +02:00
LICENSES
mm mm: call arch_swap_restore() from do_swap_page() 2023-07-19 16:21:16 +02:00
net netlink: Add __sock_i_ino() for __netlink_diag_dump(). 2023-07-19 16:21:13 +02:00
rust rust: kernel: Mark rust_fmt_argument as extern "C" 2023-04-26 14:28:38 +02:00
samples samples/bpf: xdp1 and xdp2 reduce XDPBUFSIZE to 60 2023-07-19 16:21:07 +02:00
scripts scripts/tags.sh: Resolve gtags empty index generation 2023-07-05 18:27:38 +01:00
security ima: Fix build warnings 2023-07-19 16:21:03 +02:00
sound ASoC: Intel: sof_sdw: remove SOF_SDW_TGL_HDMI for MeteorLake devices 2023-07-19 16:21:18 +02:00
tools selftests: rtnetlink: remove netdevsim device after ipsec offload test 2023-07-19 16:21:12 +02:00
usr
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-06-28 11:12:23 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS smb: move client and server files to common directory fs/smb 2023-06-28 11:12:40 +02:00
Makefile Linux 6.1.38 2023-07-05 18:27:38 +01:00
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.