We've been ignoring the poor bugzilla reporters that say PSR causes
system lockups and all other sorts of problems. The earliest bug
report is from April, so I think we can use the "revert the offending
commit if no fixes are presented within 8 months" rule here.

Fixes: 9b58e352b463 ("drm/i915: Enable PSR by default on Haswell and 
Broadwell.")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97602
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97515
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96736
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96704
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96569
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95176
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94985
Cc: <sta...@vger.kernel.org> # v4.6+
Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
Cc: Jim Bride <jim.br...@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index d5f8d03..6aca8ff 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -823,13 +823,9 @@ void intel_psr_init(struct drm_i915_private *dev_priv)
        dev_priv->psr_mmio_base = IS_HASWELL(dev_priv) ?
                HSW_EDP_PSR_BASE : BDW_EDP_PSR_BASE;
 
-       /* Per platform default */
-       if (i915.enable_psr == -1) {
-               if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-                       i915.enable_psr = 1;
-               else
-                       i915.enable_psr = 0;
-       }
+       /* Per platform default: all disabled. */
+       if (i915.enable_psr == -1)
+               i915.enable_psr = 0;
 
        /* Set link_standby x link_off defaults */
        if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-- 
2.7.4

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