[Bug 67245] [BayTrail-M] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Wed Nov 6 23:53:37 PST 2013
https://bugs.freedesktop.org/show_bug.cgi?id=67245
--- Comment #31 from EvaWang <evawang at linpus.com> ---
It can enter to OS successfully after added below three patches, please refer
dmesg_1107.log. Thanks a lot!
http://lists.freedesktop.org/archives/intel-gfx/2013-November/035237.html
http://lists.freedesktop.org/archives/intel-gfx/2013-November/035276.html
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1230,9 +1230,7 @@ void ironlake_edp_panel_off(struct intel_dp *intel_dp)
WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n");
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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