On 2016-06-06 19:16, Meng Yi wrote:
> Hi Stefan,
>
> Sorry for reply late, I was on PTO. And another PTO on June 9~11, 2016.UTC+8
>
>> >> static const struct regmap_config fsl_dcu_regmap_config = {
>> >> .reg_bits = 32,
>> >> .reg_stride = 4,
>> >> .val_bits = 32,
>> >> .cache_type = REGCACHE_RBTREE,
>> >
>> > This needs to be a flat cache. See
>> > https://lists.freedesktop.org/archives/dri-devel/2016-January/099121.h
>> > tml or https://lkml.org/lkml/2016/3/24/281
>> > max_register also needs an appropriate value.
>>
>> Ok, since the complete set which switches to the atomic helper is not stable
>> material (and also won't make it into 4.7 anymore), I created a seperate bugfix
>> now:
>> https://lists.freedesktop.org/archives/dri-devel/2016-June/109625.html
>>
>
> What is bug?
>
The bug is that we should not use REGCACHE_RBTREE for MMIO registers...
--
Stefan
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