[Bug 69128] [IVB dp dongle] Aplle miniDP-to-VGA fails link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69128

Jani Nikula <jani.nikula at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #7 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to comment #6)
> I fetched intel-dp-fixes branch of this repo to Daniel's tree, then build a
> kernel, this issue come up again.

Hmm, please try the below patch on top of:

> commit c030533419ec5f9ce042bafb6f40368f310181f8
> Author: Jani Nikula <jani.nikula at intel.com>
> Date:   Wed Sep 11 14:46:20 2013 +0300
> 
>     drm/i915/dp: read DPCD PSR capability only on eDP

Thanks.

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 08f9d2d..97063b3 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -677,7 +677,7 @@ intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
              */
             if (intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
                 DP_DWN_STRM_PORT_PRESENT)
-                usleep_range(500, 600);
+                usleep_range(5000, 7000);
             else
                 usleep_range(300, 400);
             continue;

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