[Bug 90625] [BSW regression] "testdisplay -d 32" core dump

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90625

--- Comment #1 from Jeff Zheng <jeff.zheng at intel.com> ---
root at xfzheng:~/git/drm-intel# git bisect start
root at xfzheng:~/git/drm-intel# git bisect good
c457879f0d8f664050e46092afde46fec58c9e67
root at xfzheng:~/git/drm-intel# git bisect bad
5d96d8afcfbb1500272756747e0bfcdbebf3b070
Bisecting: a merge base must be tested
[214a2b7fab215b1e979fbae51225b01b8fc58288] drm/i915: Update DRIVER_DATE to
20150508
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 404 revisions left to test after this (roughly 9 steps)
[6c9d370c16aad97cfc6de68666634eaabac2b048] Merge branch 'upstream' of
git://git.linux-mips.org/pub/scm/ralf/upstream-linus
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 201 revisions left to test after this (roughly 8 steps)
[518af3cb8ccaf32057db6046e241ec393d6c7b98] Merge branch 'master' of
git://git.linux-mips.org/pub/scm/ralf/upstream-linus
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 117 revisions left to test after this (roughly 7 steps)
[e26081808edadfd257c6c9d81014e3b25e9a6118] Linux 4.1-rc4
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 58 revisions left to test after this (roughly 6 steps)
[d94b5030d26b4f45510a092262bc2b542a00bd7c] drm/i915: Ensure cache flushes prior
to doing CS flips
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 29 revisions left to test after this (roughly 5 steps)
[8504c74c7ae48b4b8ed1f1c0acf67482a7f45c93] drm/i915: Preserve ddi_pll_sel when
allocating new pipe_config
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 14 revisions left to test after this (roughly 4 steps)
[1e8df16778b0d8fd8102b3ee799b028f8f961089] drm/i915/skl: Swapping 90 and 270 to
be compliant with Xrandr
root at xfzheng:~/git/drm-intel# git bisect bad
Bisecting: 7 revisions left to test after this (roughly 3 steps)
[0c9b371550f40f8273a835f1e1055445cc3e2498] drm/i915: add HAS_DP_MST feature
test macro
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 3 revisions left to test after this (roughly 2 steps)
[6c0fd451bdde9a6d0ac408bd078351890228e465] drm/i915: Tighten the exposure
ARGB/ABGR 8888 formats
root at xfzheng:~/git/drm-intel# git bisect bad
Bisecting: 1 revision left to test after this (roughly 1 step)
[e0681e3841118b470b312b7c62c90af9364fce8d] drm/i915/bxt: Move around lane
stagger calculation
root at xfzheng:~/git/drm-intel# git bisect good
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[c965d99557fd48e8c57d793ec22458e508cbf676] drm/i915: Fix 'suspedn' typo
root at xfzheng:~/git/drm-intel# git bisect good
6c0fd451bdde9a6d0ac408bd078351890228e465 is the first bad commit
commit 6c0fd451bdde9a6d0ac408bd078351890228e465
Author: Damien Lespiau <damien.lespiau at intel.com>
Date:   Tue May 19 12:29:16 2015 +0100

    drm/i915: Tighten the exposure ARGB/ABGR 8888 formats

    ARGB8888 is used for cursors on all platforms so we need to allow it
    everywhere.

    ABGR8888 is currently only honoured:
      - on VLV/CHV in sprite planes
      - on SKL+ for primary and sprite planes
    so only allow it for those platforms.

    Note that we only support ARGB8888/ABGR8888 on the primary plane for
    SKL/BXT because we have in line of sight the pipe bottom color on those
    platforms and because the primary plane programming on VLV/CHV doesn't
    anything different for those formats today.

    v2: Fix the logic to forbid the creation ABGR2101010 fbs (Ville)
    v3: Still allow the creation of ARGB8888 fbs now that cursor planes use
        real fb objects (found by PRTS).

    Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

:040000 040000 322b628bb8364c3ff3f13826349abe6c3b49eff7
772ec232149432c26c2a7c92055c623c2bb13d39 M      drivers

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