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

[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?

Thanks,

Alex