[Bug 31400] New: [RV740] Mipmapping broken in drm-radeon-next / drm-next

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31400

           Summary: [RV740] Mipmapping broken in drm-radeon-next /
                    drm-next
           Product: DRI
           Version: DRI CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: liquid.acid at gmx.net


Hey there,

I already partially explained this in bug #31046.

With a recent drm-radeon-next or also drm-next the mipmaps are broken with both
r600c and r600g.

My hardware:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 4770 [RV740]

libdrm, xf86-video-ati and mesa are all git master tip.

Today I found some time to bisect drm-next and this commit introduces the
mipmap issue:
881fe6c1d06bf49f4ab7aef212cdaf66bd059614

drm/radeon/kms: properly compute group_size on 6xx/7xx

Needed for tiled surfaces.

-------------------------------

Link:
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commit;h=881fe6c1d06bf49f4ab7aef212cdaf66bd059614

Looks like tiling_group_size has to be 256 on my hardware.

Greets,
Tobias

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