[Bug 107562] ThinkPad T450 - Broadwell-U: [drm:hsw_disable_ips [i915]] *ERROR* Timed out waiting for IPS disable

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107562

--- Comment #15 from Imre Deak <imre.deak at intel.com> ---
Hi Diego,

sounds like a timing issue. Could you try if you can reproduce the problem with
the following patch?

diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index ad0f0e5389d9..19c4b3ff691b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5081,7 +5081,7 @@ void hsw_disable_ips(const struct intel_crtc_state
*crtc_state)
                /* wait for pcode to finish disabling IPS, which may take up to
42ms */
                if (intel_wait_for_register(dev_priv,
                                            IPS_CTL, IPS_ENABLE, 0,
-                                           42))
+                                           100))
                        DRM_ERROR("Timed out waiting for IPS disable\n");
        } else {
                I915_WRITE(IPS_CTL, 0);

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