Re: [PATCH 00/29] Enabling new DAL display driver for amdgpu on Carrizo and Tonga

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On Sat, Feb 13, 2016 at 12:05:48AM +0000, Wentland, Harry wrote:
> Hi Dave, Daniel, others,

[...]

> There's still a bunch of legacy stuff in these patches that's on our list of things to refactor. Some of that is 
> - dc/adapter
> - dc/asic_capability
> - dc/audio
> - dc/bios
> - dc/gpio
> 
> We should be able to cut the size of this code to about 1/3 of what it is now.
> 
> As for the LOC we have about
> 22k for HW programming
> 30k legacy stuff
> 6k  dc/calcs - autogenerated from formulas provided by HW team
> 15k includes
> 6k  amdgpu_dm
> 8k  dc/core
> 
> About 14k of those are blank lines (we have a habit of leaving lots of blank space) and 16k are comments.

Cleaning up that is not enough, abstracting kernel API like kmalloc or i2c,
or similar, is a no go. If the current drm infrastructure does not suit your
need then you need to work on improving it to suit your need. You can not
redevelop a whole drm layer inside your code and expect to upstream it.

Linux device driver are about sharing infrastructure and trying to expose
it through common API to userspace.

So i strongly suggest that you start thinking on how to change the drm API
to suit your need and to start discussions about those changes. If you need
them then they will likely be usefull to others down the road.

Cheers,
Jérôme
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