[Bug 70117] [ivb cpu edp] clock recovery fails with too many full/voltage retries, channel equalization succeeds

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70117

--- Comment #3 from Jesse Barnes <jbarnes at virtuousgeek.org> ---
Can you try this patch?

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 97dfa05..876b98d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1223,7 +1223,7 @@ void ironlake_edp_panel_off(struct intel_dp *intel_dp)
        pp = ironlake_get_pp_control(intel_dp);
        /* We need to switch off panel power _and_ force vdd, for otherwise
some
         * panels get very unhappy and cease to work. */
-       pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET |
EDP_BLC_EN
+       pp &= ~(POWER_TARGET_ON | PANEL_POWER_RESET | EDP_BLC_ENABLE);

        pp_ctrl_reg = _pp_ctrl_reg(intel_dp);

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