[Intel-gfx] [PATCH] drm/i915: support address only i2c-over-aux transactions

[Christian König]

Am 08.04.2014 15:04, schrieb Alex Deucher:
> On Tue, Apr 8, 2014 at 4:03 AM, Daniel Vetter <daniel at ffwll.ch> wrote:
>> On Tue, Apr 8, 2014 at 8:58 AM, Jani Nikula <jani.nikula at intel.com> wrote:
>>> Before the conversion to dp aux helpers there was a switch case [1] that
>>> ended up in msg_bytes = 3 for address only start/stop messages
>>> (MODE_I2C_START or MODE_I2C_STOP bit set [2]). With Alex's series in,
>>> but without my patch, we'd send the four byte header but with 0 - 1 =
>>> 0xff in txbuf[3]. I'm pretty sure breakage would follow.
>>>
>>> Thus I'd like to have my patch in before the dp aux helpers use
>>> msg->size == 0 for address only messages.
>>>
>>> Daniel, convinced yet?
>> Indeed, I've been blinding. Acked for merging through radeon trees
>> together with the other patches as a fixup for 3.15.
> Christian,
>
> Can you pull this into the radeon 3.15 branch as well?

Sure, directly before your other patches I would assume.

Going to send out the pull request to Dave this evening if nobody objects.

Christian.

>
> Thanks,
>
> Alex