Re: [PATCH 1/3] drm: mxsfb: Change driver.name to mxsfb-drm

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On 06/15/2018 10:58 PM, Leonard Crestez wrote:
> On Fri, 2018-06-15 at 16:47 -0300, Fabio Estevam wrote:
> 
>> On Fri, Jun 15, 2018 at 4:43 PM, Leonard Crestez
>> <leonard.crestez@xxxxxxx> wrote:
>>> The FBDEV driver uses the same name and both can't be registered at the
>>> same time. Fix this by renaming the drm driver to mxsfb-drm
>>>
>>> Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx>
>>
>> Stefan sent the same patch a few days ago:
>> http://www.spinics.net/lists/dri-devel/msg179489.html
> 
> In that thread there is a proposal for removing the old fbdev/mxsfb
> driver entirely.
> 
> That would break old DTBs, isn't this generally considered bad? Also,
> are we sure the removal of fbdev/mxsfb wouldn't lose any features?
> 
> What my series does is make both drivers work with the same kernel
> image and turns the choice into a board-level dtb decision. Supporting
> everything at once seems desirable to me and it allows for a very
> smooth upgrade path.

Having two drivers in the kernel with different set of bugs is always bad.

> The old driver could be removed later, after all users are converted.

Both drivers were in for long enough already. And let's be realistic,
how many MX23/MX28 users of old DTs with new kernels are there who
cannot update the DT as well ?

IMO keeping the old FBDEV driver in is just an excuse to postpone the
long overdue DT update and I dislike that. Update any remaining DTs and
nuke the FBDEV driver already.

-- 
Best regards,
Marek Vasut
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