[Bug 66942] Cayman HD 6950 hangs at start when loading kernel 3.11.0-rc1 or drm-next

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66942

--- Comment #4 from Alexandre Demers <alexandre.f.demers at gmail.com> ---
Here is the first bad commit, which is pretty large since it doesn't point what
was changed before. It could be about any commit before that that touches
Cayman.

69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 is the first bad commit
commit 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043
Author: Alex Deucher <alexander.deucher at amd.com>
Date:   Fri Apr 12 16:42:42 2013 -0400

    drm/radeon/kms: add dpm support for cayman (v5)

    This adds dpm support for cayman asics.  This includes:
    - clockgating
    - dynamic engine clock scaling
    - dynamic memory clock scaling
    - dynamic voltage scaling
    - dynamic pcie gen1/gen2 switching (requires additional acpi support)
    - power containment
    - shader power scaling

    Set radeon.dpm=1 to enable.

    v2: fold in tdp fix
    v3: fix indentation
    v4: fix 64 bit div
    v5: attempt to fix state enable

    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
    Reviewed-by: Jerome Glisse <jglisse at redhat.com>

:040000 040000 aa90c4d442d7640629695b1dc48e0ef1b3958e20
fc06e4965a658e0600ab5b250ae135e9e8225ca4 M    drivers

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