<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [HD-4400]No native resolution 2560x1600 on Lenovo Onelink Pro DisplayPort and X1 Carbon 2014"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78507">bug 78507</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>NEEDINFO
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [HD-4400]No native resolution 2560x1600 on Lenovo Onelink Pro DisplayPort and X1 Carbon 2014"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78507#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [HD-4400]No native resolution 2560x1600 on Lenovo Onelink Pro DisplayPort and X1 Carbon 2014"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78507">bug 78507</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>Please try this hack patch on top of nightly:
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index a13f1f51f68e..2020619e2b98 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -591,7 +591,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct
drm_dp_aux_msg *msg)
* is required to retry at least seven times upon receiving AUX_DEFER
* before giving up the AUX transaction.
*/
- for (retry = 0; retry < 7; retry++) {
+ for (retry = 0; retry < 50; retry++) {
err = aux->transfer(aux, msg);
if (err < 0) {
if (err == -EBUSY)
@@ -649,7 +649,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct
drm_dp_aux_msg *msg)
case DP_AUX_I2C_REPLY_DEFER:
DRM_DEBUG_KMS("I2C defer\n");
- usleep_range(400, 500);
+ usleep_range(1400, 1500);
continue;
default:</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>