[Bug 60969] [r600g] Lockup while playing OpenGL games with HD6450

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60969

--- Comment #1 from Chris Rankin <rankincj at googlemail.com> ---
According to git bisect:

974b482acaf62ced1e8981761a8bda252bd51fe1 is the first bad commit
commit 974b482acaf62ced1e8981761a8bda252bd51fe1
Author: Jerome Glisse <jglisse at redhat.com>
Date:   Fri Feb 8 16:02:32 2013 -0500

    r600g: fix lockup when hyperz & alpha test are enabled together. v3

    Seems that alpha test being enabled confuse the GPU on the order in
    which it should perform the Z testing. So force the order programmed
    throught db shader control.

    v2: Only force z order when alpha test is enabled
    v3: Update db shader when binding new dsa + spelling fix

    Signed-off-by: Jerome Glisse <jglisse at redhat.com>
    Reviewed-by: Marek Olšák <maraeo at gmail.com>

This results in GPU stalls, which can be reset succesfully.

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