drm/i915: Fix DDC on some systems by clearing BIOS GMBUS setup.

Browse source

This is a sync of a fix I made in the old UMS code.  If the BIOS uses
the GMBUS and doesn't clear that setup, then our bit-banging I2C can
fail, leading to monitors not being detected.

Signed-off-by: Eric Anholt <eric@anholt.net>

...

This commit is contained in:

Eric Anholt 2009-12-01 11:56:30 -08:00

parent d09c23de9f

commit f0217c42c9

4 changed files with 39 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

14

drivers/gpu/drm/i915/i915_reg.h

View file

5

drivers/gpu/drm/i915/i915_suspend.c

View file

2

drivers/gpu/drm/i915/intel_drv.h

View file

19

drivers/gpu/drm/i915/intel_i2c.c

View file