Revision 8f4d38099b3098eae75f7755e1801931f8141350 authored by Ville Syrjälä on 15 December 2016, 17:47:34 UTC, committed by Jani Nikula on 07 June 2017, 13:31:39 UTC
The scanline counter is bonkers on VLV/CHV DSI. The scanline counter increment is not lined up with the start of vblank like it is on every other platform and output type. This causes problems for both the vblank timestamping and atomic update vblank evasion. On my FFRD8 machine at least, the scanline counter increment happens about 1/3 of a scanline ahead of the start of vblank (which is where all register latching happens still). That means we can't trust the scanline counter to tell us whether we're in vblank or not while we're on that particular line. In order to keep vblank timestamping in working condition when called from the vblank irq, we'll leave scanline_offset at one, which means that the entire line containing the start of vblank is considered to be inside the vblank. For the vblank evasion we'll need to consider that entire line to be bad, since we can't tell whether the registers already got latched or not. And we can't actually use the start of vblank interrupt to get us past that line as the interrupt would fire too soon, and then we'd up waiting for the next start of vblank instead. One way around that would using the frame start interrupt instead since that wouldn't fire until the next scanline, but that would require some bigger changes in the interrupt code. So for simplicity we'll just poll until we get past the bad line. v2: Adjust the comments a bit Cc: stable@vger.kernel.org Cc: Jonas Aaberg <cja@gmx.net> Tested-by: Jonas Aaberg <cja@gmx.net> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99086 Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161215174734.28779-1-ville.syrjala@linux.intel.com Tested-by: Mika Kahola <mika.kahola@intel.com> Reviewed-by: Mika Kahola <mika.kahola@intel.com> (cherry picked from commit ec1b4ee2834e66884e5b0d3d465f347ff212e372) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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adfs | ||
affs | ||
afs | ||
autofs4 | ||
befs | ||
bfs | ||
btrfs | ||
cachefiles | ||
ceph | ||
cifs | ||
coda | ||
configfs | ||
cramfs | ||
crypto | ||
debugfs | ||
devpts | ||
dlm | ||
ecryptfs | ||
efivarfs | ||
efs | ||
exofs | ||
exportfs | ||
ext2 | ||
ext4 | ||
f2fs | ||
fat | ||
freevxfs | ||
fscache | ||
fuse | ||
gfs2 | ||
hfs | ||
hfsplus | ||
hostfs | ||
hpfs | ||
hugetlbfs | ||
isofs | ||
jbd2 | ||
jffs2 | ||
jfs | ||
kernfs | ||
lockd | ||
minix | ||
ncpfs | ||
nfs | ||
nfs_common | ||
nfsd | ||
nilfs2 | ||
nls | ||
notify | ||
ntfs | ||
ocfs2 | ||
omfs | ||
openpromfs | ||
orangefs | ||
overlayfs | ||
proc | ||
pstore | ||
qnx4 | ||
qnx6 | ||
quota | ||
ramfs | ||
reiserfs | ||
romfs | ||
squashfs | ||
sysfs | ||
sysv | ||
tracefs | ||
ubifs | ||
udf | ||
ufs | ||
xfs | ||
Kconfig | -rw-r--r-- | 7.2 KB |
Kconfig.binfmt | -rw-r--r-- | 7.2 KB |
Makefile | -rw-r--r-- | 4.2 KB |
aio.c | -rw-r--r-- | 45.9 KB |
anon_inodes.c | -rw-r--r-- | 4.9 KB |
attr.c | -rw-r--r-- | 9.2 KB |
bad_inode.c | -rw-r--r-- | 5.3 KB |
binfmt_aout.c | -rw-r--r-- | 10.8 KB |
binfmt_elf.c | -rw-r--r-- | 61.3 KB |
binfmt_elf_fdpic.c | -rw-r--r-- | 47.0 KB |
binfmt_em86.c | -rw-r--r-- | 2.8 KB |
binfmt_flat.c | -rw-r--r-- | 27.9 KB |
binfmt_misc.c | -rw-r--r-- | 18.3 KB |
binfmt_script.c | -rw-r--r-- | 3.0 KB |
block_dev.c | -rw-r--r-- | 52.9 KB |
buffer.c | -rw-r--r-- | 91.1 KB |
char_dev.c | -rw-r--r-- | 16.1 KB |
compat.c | -rw-r--r-- | 5.1 KB |
compat_binfmt_elf.c | -rw-r--r-- | 3.4 KB |
compat_ioctl.c | -rw-r--r-- | 45.8 KB |
coredump.c | -rw-r--r-- | 21.3 KB |
dax.c | -rw-r--r-- | 41.2 KB |
dcache.c | -rw-r--r-- | 93.8 KB |
dcookies.c | -rw-r--r-- | 6.9 KB |
direct-io.c | -rw-r--r-- | 38.3 KB |
drop_caches.c | -rw-r--r-- | 1.6 KB |
eventfd.c | -rw-r--r-- | 12.9 KB |
eventpoll.c | -rw-r--r-- | 62.1 KB |
exec.c | -rw-r--r-- | 44.5 KB |
fcntl.c | -rw-r--r-- | 20.6 KB |
fhandle.c | -rw-r--r-- | 6.8 KB |
file.c | -rw-r--r-- | 23.6 KB |
file_table.c | -rw-r--r-- | 8.6 KB |
filesystems.c | -rw-r--r-- | 6.4 KB |
fs-writeback.c | -rw-r--r-- | 70.5 KB |
fs_pin.c | -rw-r--r-- | 2.0 KB |
fs_struct.c | -rw-r--r-- | 3.3 KB |
inode.c | -rw-r--r-- | 54.9 KB |
internal.h | -rw-r--r-- | 4.6 KB |
ioctl.c | -rw-r--r-- | 17.3 KB |
iomap.c | -rw-r--r-- | 22.7 KB |
libfs.c | -rw-r--r-- | 30.5 KB |
locks.c | -rw-r--r-- | 73.3 KB |
mbcache.c | -rw-r--r-- | 11.9 KB |
mount.h | -rw-r--r-- | 3.7 KB |
mpage.c | -rw-r--r-- | 20.5 KB |
namei.c | -rw-r--r-- | 120.9 KB |
namespace.c | -rw-r--r-- | 85.3 KB |
no-block.c | -rw-r--r-- | 688 bytes |
nsfs.c | -rw-r--r-- | 5.6 KB |
open.c | -rw-r--r-- | 28.2 KB |
pipe.c | -rw-r--r-- | 27.3 KB |
pnode.c | -rw-r--r-- | 12.1 KB |
pnode.h | -rw-r--r-- | 1.9 KB |
posix_acl.c | -rw-r--r-- | 21.4 KB |
proc_namespace.c | -rw-r--r-- | 7.8 KB |
read_write.c | -rw-r--r-- | 47.2 KB |
readdir.c | -rw-r--r-- | 11.2 KB |
select.c | -rw-r--r-- | 35.6 KB |
seq_file.c | -rw-r--r-- | 22.7 KB |
signalfd.c | -rw-r--r-- | 9.2 KB |
splice.c | -rw-r--r-- | 40.0 KB |
stack.c | -rw-r--r-- | 2.5 KB |
stat.c | -rw-r--r-- | 19.1 KB |
statfs.c | -rw-r--r-- | 9.7 KB |
super.c | -rw-r--r-- | 38.9 KB |
sync.c | -rw-r--r-- | 9.9 KB |
timerfd.c | -rw-r--r-- | 13.4 KB |
userfaultfd.c | -rw-r--r-- | 47.4 KB |
utimes.c | -rw-r--r-- | 7.1 KB |
xattr.c | -rw-r--r-- | 23.3 KB |
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