Re: [PATCH v4 5/7] ARM: Exynos: remove code for MFC custom reserved memory handling

[Krzysztof Kozlowski <k.kozlowski@samsung.com>]

On 06/03/2016 08:57 AM, Krzysztof Kozlowski wrote:
> On 06/02/2016 07:25 PM, Javier Martinez Canillas wrote:
>> Marek mentioned that bisectability is only partially broken because the old
>> binding will still work after this series if IOMMU is enabled (because the
>> properties are ignored in this case). But will break if IOMMU isn't enabled
>> which will be the case for some boards that fails to boot with IOMMU due the
>> bootloader leaving the FIMD enabled doing DMA operations automatically AFAIU. 
>>
>> Now, I'm OK with not keeping backwards compatibility for the MFC dt bindings
>> since arguably the driver has been broken for a long time and nobody cared
>> and also I don't think anyone in practice boots a new kernel with an old DTB
>> for Exynos.
>>
>> But I don't think is correct to introduce a new issue as is the case if this
>> patch is applied before the previous patches in the series since this causes
>> the driver to probe to fail and the following warn on boot (while it used to
>> at least probe correctly in mainline):
> 
> Okay but the patches will go through separate tree. This is not a
> problem, as I said, I just need a stable tag from media tree with first
> four patches (Mauro?).

Applied again this and DTS changes (remaining two patches) for v4.8 on
top of branch provided by Sylwester:
https://git.kernel.org/cgit/linux/kernel/git/krzk/linux.git/log/?h=for-v4.8/exynos-mfc

Best regards,
Krzysztof