[Intel-gfx] [PATCH] drm/i915: Reset GMBUS controller after NAK

[Keith Packard]

On Wed, 30 Mar 2011 18:42:44 +0100, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> Once a NAK has been asserted by the slave, we need to reset the GMBUS
> controller in order to continue. This is done by asserting the Software
> Clear Interrupt bit and then clearing it again to restore operations.
> 
> If we don't clear the NAK, then all future GMBUS xfers will fail,
> including DDC probes and EDID retrieval.
> 
> v2: Add some comments as suggested by Keith Packard.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=35781
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Keith Packard <keithp at keithp.com>

-- 
keith.packard at intel.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20110330/91fb616f/attachment.sig>