https://github.com/torvalds/linux
Revision 8fd3b90300bec541806dac271de2fd44e2e4e2d2 authored by Paul Kocialkowski on 15 November 2018, 16:32:48 UTC, committed by Daniel Vetter on 21 November 2018, 09:38:19 UTC
Writeback connectors do not produce any on-screen output and require
special care for use. Such connectors are hidden from enumeration in
DRM resources by default, but they are still picked-up by fbdev.
This makes rather little sense since fbdev is not really adapted for
dealing with writeback.
Moreover, this is also a source of issues when userspace disables the
CRTC (and associated plane) without detaching the CRTC from the
connector (which is hidden by default). In this case, the connector is
still using the CRTC, leading to am "enabled/connectors mismatch" and
eventually the failure of the associated atomic commit. This situation
happens with VC4 testing under IGT GPU Tools.
Filter out writeback connectors in the fbdev helper to solve this.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Tested-by: Maxime Ripard <maxime.ripard@bootlin.com>
Fixes: 935774cd71fe ("drm: Add writeback connector type")
Cc: <stable@vger.kernel.org> # v4.19+
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181115163248.21168-1-paul.kocialkowski@bootlin.com
1 parent 5c074ee
Tip revision: 8fd3b90300bec541806dac271de2fd44e2e4e2d2 authored by Paul Kocialkowski on 15 November 2018, 16:32:48 UTC
drm/fb-helper: Blacklist writeback when adding connectors to fbdev
drm/fb-helper: Blacklist writeback when adding connectors to fbdev
Tip revision: 8fd3b90
.gitignore
#
# NOTE! Don't add files that are generated in specific
# subdirectories here. Add them in the ".gitignore" file
# in that subdirectory instead.
#
# NOTE! Please use 'git ls-files -i --exclude-standard'
# command after changing this file, to see if there are
# any tracked files which get ignored after the change.
#
# Normal rules (sorted alphabetically)
#
.*
*.a
*.asn1.[ch]
*.bin
*.bz2
*.c.[012]*.*
*.dtb
*.dtb.S
*.dwo
*.elf
*.gcno
*.gz
*.i
*.ko
*.lex.c
*.ll
*.lst
*.lz4
*.lzma
*.lzo
*.mod.c
*.o
*.o.*
*.order
*.patch
*.s
*.so
*.so.dbg
*.su
*.symtypes
*.tab.[ch]
*.tar
*.xz
Module.symvers
modules.builtin
#
# Top-level generic files
#
/tags
/TAGS
/linux
/vmlinux
/vmlinux.32
/vmlinux-gdb.py
/vmlinuz
/System.map
/Module.markers
#
# RPM spec file (make rpm-pkg)
#
/*.spec
#
# Debian directory (make deb-pkg)
#
/debian/
#
# Snap directory (make snap-pkg)
#
/snap/
#
# tar directory (make tar*-pkg)
#
/tar-install/
#
# git files that we don't want to ignore even if they are dot-files
#
!.gitignore
!.mailmap
!.cocciconfig
!.clang-format
#
# Generated include files
#
include/config
include/generated
include/ksym
arch/*/include/generated
# stgit generated dirs
patches-*
# quilt's files
patches
series
# cscope files
cscope.*
ncscope.*
# gnu global files
GPATH
GRTAGS
GSYMS
GTAGS
# id-utils files
ID
*.orig
*~
\#*#
#
# Leavings from module signing
#
extra_certificates
signing_key.pem
signing_key.priv
signing_key.x509
x509.genkey
# Kconfig presets
all.config
# Kdevelop4
*.kdev4
Computing file changes ...
