[Bug 87976] New: Iceland chips support missing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87976

            Bug ID: 87976
           Summary: Iceland chips support missing
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: da.hilloulin at gmail.com
        QA Contact: xorg-team at lists.x.org

Hello,

I have recently bought a Toshiba Satellite L50-B-1HU including a R7M260 based
on a Topaz chip. According to AMD CodeXL 1.6 (used on windows), this chip is a
member of the recent Iceland chip family for which there is no support in the
Linux kernel, nor in the radeon DDX, nor in libdrm.

I have read some articles on the internet, and it seems that this chip is quite
the same as the oland version (same number of shaders unit, frequencies etc),
so I hoped that it was a simple rebranding.
Therefore I have (naively) tried to add support myself by adding the PCI-ID
(0x6900/0x6901) to the radeon drm driver, radeon ddx driver and libdrm and
telling that this is an Oland chip. But it doesn't work.

Could it be possible to add support for this chip?

Or if the chip is supposed to be supported only by the same code as for the
Tonga chip (that we don't know yet when it will be merged), could it be
possible to have some documentation so that I can make some dirty code to make
a minimal support for personal use?
(I would like to try Clover on this chip).

Thanks for any help.

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