Re: Using amdgpu as default for all GCN cards

Luya Tshimbalanga <luya@xxxxxxxxxxxxxxxxx> · Mon, 25 Sep 2017 11:28:14 -0700



    On 25/09/17 04:51 AM, Kamil Paral
      wrote:

    
          On Sun, Sep 24, 2017 at 10:53 AM,
            Luya Tshimbalanga <luya@xxxxxxxxxxxxxxxxx>
            wrote:

            Disclaimer: I am not a
              coder, just a graphic designer looking to improve the
              entire AMD GCN cards from an AMD power laptop.

              After seeing the improvement done on AMD support from the
              past years, one step is missing, enable amdgpu module as
              default for all GCN cards including South Island and Sea
              Island.

              A Fedora contributor  provided a special kernel with these
              support. It will be nice if that was applied on the
              mainline Fedora kernel to enhance AMD hardware for their
              user.

              
              Taking initiative, I set a draft wiki on https://fedoraproject.org/wiki/User:Luya/Changes/amdgpu_default_for_GCN_cards

              
              Idea was inspired by  this comment: https://www.phoronix.com/forums/forum/phoronix/latest-phoronix-articles/978664-nouveau-developers-remain-blocked-by-nvidia-from-advancing-open-source-driver?p=978746#post978746

              
              P.S: OpenCL was in considering with the ROCm project but
              that is another story.

              
              Luya

            
          Hi, I belive there are known issues when using amdgpu kernel
          driver with older GCN cards. Both performance wise and feature
          wise. You should best talk to Fedora kernel graphics team
          about this - I believe Dave Airlie and Adam Jackson are
            the right contact people here.
        

    Thanks Kamil. Is fedora-kernel mailing list the right channel of
    contact?

    
        Also, is this
            something that should be configured on distro level? I'd
            assume that AMD kernel developers could switch the older
            cards to amdgpu by default any time they wanted, once they
            consider the support good enough. That's why it is currently
            hidden behind an experiemental kernel cmdline switch. I'm
            not clear whether distribution level override is in order
            there.

          
    So far, Sea Island cards are enabled by default from kernel 4.13.x
    while only the old GCN cards (South Island) are the last to remain
    experimental. Fortunately, the latter is improving quicker.
    Distribution override has been done before in the past to gather
    data for fixing issues (kdbus came in mind). After all, Fedora is
    about pushing new and improved technologies hence test days.

    
    -- 
Luya Tshimbalanga
Graphic & Web Designer
E: luya@xxxxxxxxxxxxxxxxx
W: http://www.coolest-storm.net

  
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