On 19/05/17 14:10, Mark Thompson wrote:
> On 19/05/17 00:43, Jun Zhao wrote:
>>
>> On 2017/5/14 12:26, Jun Zhao wrote:
>>> V3: - Fix build error with old VAAPI version.
>>> V2: - Refine the name/value type to mb_rate_control/bool.
>>>     - Only supported GEN9+ (SKL/APL/KBL/...)
>>>     - i965 driver default use frame-level rate control algorithm (generate 
>>> the QP for each frame), 
>>>       when enable mb_rate_control, it's will enable the MB-level RC 
>>> algorithm (generate the QP for each MB). 
>>>     - enables MB-level bitrate control that generally improves subjective 
>>> visual quality, 
>>>       but have negative impact on performance and objective visual quality 
>>> metric. 
>>>
>>
>> Ping ?
> 
> I fixed the default/enable/disable inconsistency in 
> <https://github.com/01org/intel-vaapi-driver/commit/0dd6ba4e26d3abaa7e66265284ef81c746c13f20>.
>   Using 0/1 as default/on is probably fine, but it doesn't match the 
> statement that it's definitely disabled if the option is zero.  (I don't mind 
> which way around that gets fixed.)
> 
> I tested with this patch and it works fine on a Skylake GT3 (6260U), but it 
> killed the whole machine when enabled on a Skylake GT2 (6300).  I haven't yet 
> had chance to investigate that further (rebooting repeatedly is kindof 
> inconvenient), but I will try to do so soon.

This failure is completely consistent.  Reported here: 
<https://github.com/01org/intel-vaapi-driver/issues/172>.

You will understand that I am reluctant to commit an option which nukes my 
machine, so lets hold off on this patch while the Intel driver people look at 
it.

Thanks,

- Mark
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