From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 97099] Regression in 9ef8537e6 "drm/radeon: don't use
 fractional dividers on RS[78]80 if SS is enabled" (RV620)
Date: Wed, 27 Jul 2016 19:11:07 +0000
Message-ID: <bug-97099-502@http.bugs.freedesktop.org/>
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--14696466670.c69bc.24520
Date: Wed, 27 Jul 2016 19:11:07 +0000
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X-Bugzilla-URL: http://bugs.freedesktop.org/
Auto-Submitted: auto-generated

https://bugs.freedesktop.org/show_bug.cgi?id=3D97099

            Bug ID: 97099
           Summary: Regression in 9ef8537e6 "drm/radeon: don't use
                    fractional dividers on RS[78]80 if SS is enabled"
                    (RV620)
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: jsagarribay@gmail.com

Created attachment 125352
  --> https://bugs.freedesktop.org/attachment.cgi?id=3D125352&action=3Dedit
Partial revert of the problematic commit

According to the patch summary it shouldn't affect my system (Mobility Rade=
on
HD3470, RV620) but it causes artifacts resembling moving waves in the displ=
ayed
image and maybe also a headache.

Reverting the second hunk in the patch is enough to get it working again (I=
'll
attach the revert).

Bisect log:

# bad: [523d939ef98fd712632d93a5a2b588e477a7565e] Linux 4.7
# good: [2dcd0af568b0cf583645c8a317dd12e344b1c72a] Linux 4.6
git bisect start 'v4.7' 'v4.6' '--' 'drivers/gpu/drm/radeon'
# good: [95306975e9dd38ba2775dd96cb29987ecc7d9360] Merge tag
'drm/tegra/for-4.7-rc1' of git://anongit.freedesktop.org/tegra/linux into
drm-next
git bisect good 95306975e9dd38ba2775dd96cb29987ecc7d9360
# good: [84787c572d402644dca4874aba73324d9f8e3948] Merge branch 'akpm' (pat=
ches
from Andrew)
git bisect good 84787c572d402644dca4874aba73324d9f8e3948
# good: [79b3c7164c18e2fe9e69b0dcc0d45bab7ae3c968] Merge branch 'drm-next-4=
.7'
of git://people.freedesktop.org/~agd5f/linux into drm-next
git bisect good 79b3c7164c18e2fe9e69b0dcc0d45bab7ae3c968
# good: [ccaa2c12fba72f3e547d18e66820e2e6c5883113] drm/radeon: do not hard
reset GPU while freezing on r600/r700 family
git bisect good ccaa2c12fba72f3e547d18e66820e2e6c5883113
# bad: [9ef8537e68941d858924a3eacee5a1945767cbab] drm/radeon: don't use
fractional dividers on RS[78]80 if SS is enabled
git bisect bad 9ef8537e68941d858924a3eacee5a1945767cbab
# first bad commit: [9ef8537e68941d858924a3eacee5a1945767cbab] drm/radeon:
don't use fractional dividers on RS[78]80 if SS is enabled

--=20
You are receiving this mail because:
You are the assignee for the bug.=

--14696466670.c69bc.24520
Date: Wed, 27 Jul 2016 19:11:07 +0000
MIME-Version: 1.0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://bugs.freedesktop.org/
Auto-Submitted: auto-generated

<html>
    <head>
      <base href=3D"https://bugs.freedesktop.org/">
    </head>
    <body><table border=3D"1" cellspacing=3D"0" cellpadding=3D"8">
        <tr>
          <th>Bug ID</th>
          <td><a class=3D"bz_bug_link=20
          bz_status_NEW "
   title=3D"NEW - Regression in 9ef8537e6 &quot;drm/radeon: don't use fract=
ional dividers on RS[78]80 if SS is enabled&quot; (RV620)"
   href=3D"https://bugs.freedesktop.org/show_bug.cgi?id=3D97099">97099</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Regression in 9ef8537e6 &quot;drm/radeon: don't use fractiona=
l dividers on RS[78]80 if SS is enabled&quot; (RV620)
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Radeon
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel&#64;lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>jsagarribay&#64;gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=3D""><a href=3D"attachment.cgi?id=3D125352=
" name=3D"attach_125352" title=3D"Partial revert of the problematic commit"=
>attachment 125352</a> <a href=3D"attachment.cgi?id=3D125352&amp;action=3De=
dit" title=3D"Partial revert of the problematic commit">[details]</a></span=
> <a href=3D'page.cgi?id=3Dsplinter.html&amp;bug=3D97099&amp;attachment=3D1=
25352'>[review]</a>
Partial revert of the problematic commit

According to the patch summary it shouldn't affect my system (Mobility Rade=
on
HD3470, RV620) but it causes artifacts resembling moving waves in the displ=
ayed
image and maybe also a headache.

Reverting the second hunk in the patch is enough to get it working again (I=
'll
attach the revert).

Bisect log:

# bad: [523d939ef98fd712632d93a5a2b588e477a7565e] Linux 4.7
# good: [2dcd0af568b0cf583645c8a317dd12e344b1c72a] Linux 4.6
git bisect start 'v4.7' 'v4.6' '--' 'drivers/gpu/drm/radeon'
# good: [95306975e9dd38ba2775dd96cb29987ecc7d9360] Merge tag
'drm/tegra/for-4.7-rc1' of git://anongit.freedesktop.org/tegra/linux into
drm-next
git bisect good 95306975e9dd38ba2775dd96cb29987ecc7d9360
# good: [84787c572d402644dca4874aba73324d9f8e3948] Merge branch 'akpm' (pat=
ches
from Andrew)
git bisect good 84787c572d402644dca4874aba73324d9f8e3948
# good: [79b3c7164c18e2fe9e69b0dcc0d45bab7ae3c968] Merge branch 'drm-next-4=
.7'
of git://people.freedesktop.org/~agd5f/linux into drm-next
git bisect good 79b3c7164c18e2fe9e69b0dcc0d45bab7ae3c968
# good: [ccaa2c12fba72f3e547d18e66820e2e6c5883113] drm/radeon: do not hard
reset GPU while freezing on r600/r700 family
git bisect good ccaa2c12fba72f3e547d18e66820e2e6c5883113
# bad: [9ef8537e68941d858924a3eacee5a1945767cbab] drm/radeon: don't use
fractional dividers on RS[78]80 if SS is enabled
git bisect bad 9ef8537e68941d858924a3eacee5a1945767cbab
# first bad commit: [9ef8537e68941d858924a3eacee5a1945767cbab] drm/radeon:
don't use fractional dividers on RS[78]80 if SS is enabled</pre>
        </div>
      </p>


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