diff options
author | Dave Airlie <airlied@linux.ie> | 2009-11-12 15:53:44 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2009-11-24 13:02:07 +1000 |
commit | 23115b0592bde5da249fcbdad7714c1f96a8e5f5 (patch) | |
tree | 01567a364e6e1cd7a0996abbc43dda19c5c4713c /drivers/gpu/drm/drm_mm.c | |
parent | ef63062716415d6e271815872b6c6654ffa9ac26 (diff) |
drm/radeon/kms: read back register before writing in IIO.
This fixes RH bugzilla #527874.
On resume the atom posting wasn't working, however vbe posting was
going fine, after 2 weeks over irc, and 8 hrs with the hardware,
I tracked it down to the memory device table and it access the MC
registers via IIO, it appears the rv515 atom iio table might not
be fully functional, so adding a readback before doing a write
either provides enough delay to make things resume correctly.
Thanks to Peng Huang at Red Hat for coming to Brisbane.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_mm.c')
0 files changed, 0 insertions, 0 deletions