[Bug 63011] radeon: horizontal stripes when updating screen

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=63011

--- Comment #4 from Mikko Rapeli <mikko.rapeli@iki.fi> ---
Git bisect is complete and I verified it a few extra times:

6596afd48af4d07c8b454849b2fe7e628974f3ef is the first bad commit
commit 6596afd48af4d07c8b454849b2fe7e628974f3ef
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Wed Jun 26 00:15:24 2013 -0400

    drm/radeon/kms: add dpm support for btc (v3)

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

    Set radeon.dpm=1 to enable.

    v2: reduce stack usage
    v3: attempt to fix state enable

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

The commit is rather big so reverting it from v3.11.5 is not trivial.

Full bisect log:

git bisect start
# bad: [ad81f0545ef01ea651886dddac4bef6cec930092] Linux 3.11-rc1
git bisect bad ad81f0545ef01ea651886dddac4bef6cec930092
# good: [8bb495e3f02401ee6f76d1b1d77f3ac9f079e376] Linux 3.10
git bisect good 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376
# good: [1286da8bc009cb2aee7f285e94623fc974c0c983] Merge tag 'sound-3.11' of
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
git bisect good 1286da8bc009cb2aee7f285e94623fc974c0c983
# bad: [1b375dc30710180c4b88cc59caba6e3481ec5c8b] mutex: Move ww_mutex
definitions to ww_mutex.h
git bisect bad 1b375dc30710180c4b88cc59caba6e3481ec5c8b
# good: [899dd388853071f5c8848545209d4e2c5d95b1d9] Merge tag
'for-linus-3.11-merge-window-part-1' of
git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
git bisect good 899dd388853071f5c8848545209d4e2c5d95b1d9
# bad: [5b0207bb59b26a8cb5b53f13c99c67eb0d2a7abb] Merge branch 'drm-next-3.11'
of git://people.freedesktop.org/~agd5f/linux into drm-next
git bisect bad 5b0207bb59b26a8cb5b53f13c99c67eb0d2a7abb
# good: [19d415a25e9078dba26adb54396d4e5b30d3b572] drm/i915: Fix old reference
to i830_sdvo_get_capabilities()
git bisect good 19d415a25e9078dba26adb54396d4e5b30d3b572
# bad: [b97721f311c68440144a95e345955284c25b69a2] drm/radeon/dpm/r7xx: properly
catch errors in dpm setup
git bisect bad b97721f311c68440144a95e345955284c25b69a2
# good: [cf0cfdd7a7c87dff0f4ac6084b73fec83caa71a4] drm/radeon/kms: fix up
dce4/5 display watermark calc for dpm
git bisect good cf0cfdd7a7c87dff0f4ac6084b73fec83caa71a4
# bad: [a5b91af2e2e36e6031296675cf0c060879268032] drm/radeon: add missing UVD
clock set in cayman dpm code
git bisect bad a5b91af2e2e36e6031296675cf0c060879268032
# bad: [7cf36de9eb584e7d0b4956b1c17d46a083bb30c4] drm/radeon/dpm: fixup dynamic
state adjust for sumo
git bisect bad 7cf36de9eb584e7d0b4956b1c17d46a083bb30c4
# bad: [d70229f704474b2932e03367a528773e336f6205] drm/radeon/kms: add dpm
support for trinity asics
git bisect bad d70229f704474b2932e03367a528773e336f6205
# good: [4a6369e9935e392402d4ccb67f5cddac953e8d3c] drm/radeon/kms: add dpm
support for rv6xx (v3)
git bisect good 4a6369e9935e392402d4ccb67f5cddac953e8d3c
# good: [dc50ba7f9a6d9a920409892c7f30bce266067345] drm/radeon/kms: add dpm
support for evergreen (v4)
git bisect good dc50ba7f9a6d9a920409892c7f30bce266067345
# bad: [80ea2c129c76a4159a93efeaef4385b6c964dfac] drm/radeon/kms: add dpm
support for sumo asics (v2)
git bisect bad 80ea2c129c76a4159a93efeaef4385b6c964dfac
# bad: [6596afd48af4d07c8b454849b2fe7e628974f3ef] drm/radeon/kms: add dpm
support for btc (v3)
git bisect bad 6596afd48af4d07c8b454849b2fe7e628974f3ef

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