<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BSW]eDP unable to light up after loading i915 driver"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80274">80274</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BSW]eDP unable to light up after loading i915 driver
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=101419" name="attach_101419" title="dmesg">attachment 101419</a> <a href="attachment.cgi?id=101419&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: No.
It's first run tests on BSW
Non-working platforms: BSW
==kernel==
--------------------------
origin/drm-intel-nightly: 78f31a2d50183db12c0532eadcf486b9ebfa5f6d(fails)
drm-intel-nightly: 2014y-06m-19d-21h-00m-17s integration manifest
origin/drm-intel-next-queued: 9c33baa6b3bbb01c1a88dceba986b20e6642cf31(fails)
drivers/i915: Fix unnoticed failure of init_ring_common()
origin/drm-intel-fixes: 4a11e398b39b018c7aa3b22267cfdf3b7fae3625(fails)
drm/i915: cache hw power well enabled state
==Bug detailed description==
-----------------------------
eDP unable to light up after loading i915 driver, and calltrace during boot.
the system is able to connect via ssh
Dmesg shows:
[ 601.382533] WARNING: CPU: 0 PID: 1096 at
drivers/gpu/drm/i915/intel_pm.c:6116 vlv_power_well_enabled+0x68/0x91 [i915]()
[ 601.382557] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm pcspkr serio_raw snd_timer
snd soundcore battery ac option usb_wwan usbserial i915 video button
drm_kms_helper drm
[ 601.382561] CPU: 0 PID: 1096 Comm: kworker/0:1 Tainted: G W
3.15.0-rc8_drm-intel-next-queued_9c33ba_20140620+ #3734
[ 601.382566] Workqueue: events console_callback
[ 601.382569] 0000000000000000 0000000000000009 ffffffff81772baa
0000000000000000
[ 601.382573] ffffffff81036e54 000000000000000f ffffffffa0068678
ffffffffa00ecae5
[ 601.382576] 0000000000030000 0000000000030000 ffff880002c80000
ffff880002c882a0
[ 601.382577] Call Trace:
[ 601.382582] [<ffffffff81772baa>] ? dump_stack+0x41/0x51
[ 601.382586] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 601.382606] [<ffffffffa0068678>] ? vlv_power_well_enabled+0x68/0x91 [i915]
[ 601.382626] [<ffffffffa0068678>] ? vlv_power_well_enabled+0x68/0x91 [i915]
[ 601.382647] [<ffffffffa0069e16>] ? check_power_well_state+0xf/0x6f [i915]
[ 601.382668] [<ffffffffa006df70>] ? intel_display_power_get+0x82/0xb9 [i915]
[ 601.382695] [<ffffffffa00c1ffb>] ? _edp_panel_vdd_on+0x58/0x15f [i915]
[ 601.382723] [<ffffffffa00c2660>] ? intel_dp_aux_ch+0x3f/0x5ae [i915]
[ 601.382751] [<ffffffffa00b488f>] ? vlv_sideband_rw+0x21f/0x2bb [i915]
[ 601.382755] [<ffffffff8104003b>] ? try_to_del_timer_sync+0x46/0x51
[ 601.382783] [<ffffffffa00c2cc6>] ? intel_dp_aux_transfer+0xf7/0x11f [i915]
[ 601.382786] [<ffffffff81777332>] ? mutex_lock+0x9/0x25
[ 601.382793] [<ffffffffa004a450>] ? drm_dp_dpcd_access+0x61/0xe7
[drm_kms_helper]
[ 601.382820] [<ffffffffa009993c>] ? chv_read64+0x221/0x221 [i915]
[ 601.382827] [<ffffffffa004a4e9>] ? drm_dp_dpcd_write+0x13/0x17
[drm_kms_helper]
[ 601.382854] [<ffffffffa00c359b>] ? intel_dp_sink_dpms+0x35/0x8f [i915]
[ 601.382881] [<ffffffffa00c3627>] ? intel_disable_dp+0x32/0x5a [i915]
[ 601.382910] [<ffffffffa00ad1db>] ? i9xx_crtc_disable+0x69/0x3c8 [i915]
[ 601.382939] [<ffffffffa00a7771>] ? intel_crtc_update_dpms+0xbd/0x11d [i915]
[ 601.382967] [<ffffffffa00aff0a>] ? intel_connector_dpms+0x3f/0x4a [i915]
[ 601.382973] [<ffffffffa004d32f>] ? drm_fb_helper_dpms.isra.7+0x83/0xd0
[drm_kms_helper]
[ 601.382979] [<ffffffffa004d3ae>] ? drm_fb_helper_blank+0x32/0x3c
[drm_kms_helper]
[ 601.382983] [<ffffffff8135e287>] ? fb_blank+0x51/0x84
[ 601.382987] [<ffffffff81356f60>] ? fbcon_blank+0x119/0x230
[ 601.382992] [<ffffffff8103ffd1>] ? lock_timer_base.isra.37+0x23/0x47
[ 601.382996] [<ffffffff8104003b>] ? try_to_del_timer_sync+0x46/0x51
[ 601.383000] [<ffffffff813aae31>] ? do_blank_screen+0x184/0x24f
[ 601.383004] [<ffffffff813ad35b>] ? console_callback+0xc6/0xed
[ 601.383008] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 601.383012] [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[ 601.383016] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 601.383019] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 601.383023] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 601.383027] [<ffffffff8177e97c>] ? ret_from_fork+0x7c/0xb0
[ 601.383031] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 601.383033] ---[ end trace cf182eec4eb73319 ]---
[ 601.383054] WARNING: CPU: 0 PID: 1096 at
drivers/gpu/drm/i915/intel_pm.c:6178 check_power_well_state+0x69/0x6f [i915]()
[ 601.383056] state mismatch for 'dpio-tx-c-01' (always_on 0 hw state 0
use-count 146 disable_power_well 1
[ 601.383080] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm pcspkr serio_raw snd_timer
snd soundcore battery ac option usb_wwan usbserial i915 video button
drm_kms_helper drm
[ 601.383083] CPU: 0 PID: 1096 Comm: kworker/0:1 Tainted: G W
3.15.0-rc8_drm-intel-next-queued_9c33ba_20140620+ #3734
[ 601.383087] Workqueue: events console_callback
[ 601.383091] 0000000000000000 0000000000000009 ffffffff81772baa
ffff8800731af918
[ 601.383094] ffffffff81036e54 0000000000000000 ffffffffa0069e70
ffffffff8333a6a8
[ 601.383098] ffffffffa00fee90 ffffffffa00fee90 0000000000000004
0000000000008000
[ 601.383098] Call Trace:
[ 601.383103] [<ffffffff81772baa>] ? dump_stack+0x41/0x51
[ 601.383107] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 601.383127] [<ffffffffa0069e70>] ? check_power_well_state+0x69/0x6f [i915]
[ 601.383132] [<ffffffff81036f04>] ? warn_slowpath_fmt+0x45/0x4a
[ 601.383152] [<ffffffffa0068695>] ? vlv_power_well_enabled+0x85/0x91 [i915]
[ 601.383173] [<ffffffffa0069e70>] ? check_power_well_state+0x69/0x6f [i915]
[ 601.383194] [<ffffffffa006df70>] ? intel_display_power_get+0x82/0xb9 [i915]
[ 601.383221] [<ffffffffa00c1ffb>] ? _edp_panel_vdd_on+0x58/0x15f [i915]
[ 601.383249] [<ffffffffa00c2660>] ? intel_dp_aux_ch+0x3f/0x5ae [i915]
[ 601.383277] [<ffffffffa00b488f>] ? vlv_sideband_rw+0x21f/0x2bb [i915]
[ 601.383281] [<ffffffff8104003b>] ? try_to_del_timer_sync+0x46/0x51
[ 601.383309] [<ffffffffa00c2cc6>] ? intel_dp_aux_transfer+0xf7/0x11f [i915]
[ 601.383312] [<ffffffff81777332>] ? mutex_lock+0x9/0x25
[ 601.383319] [<ffffffffa004a450>] ? drm_dp_dpcd_access+0x61/0xe7
[drm_kms_helper]
[ 601.383346] [<ffffffffa009993c>] ? chv_read64+0x221/0x221 [i915]
[ 601.383353] [<ffffffffa004a4e9>] ? drm_dp_dpcd_write+0x13/0x17
[drm_kms_helper]
[ 601.383380] [<ffffffffa00c359b>] ? intel_dp_sink_dpms+0x35/0x8f [i915]
[ 601.383407] [<ffffffffa00c3627>] ? intel_disable_dp+0x32/0x5a [i915]
[ 601.383436] [<ffffffffa00ad1db>] ? i9xx_crtc_disable+0x69/0x3c8 [i915]
[ 601.383465] [<ffffffffa00a7771>] ? intel_crtc_update_dpms+0xbd/0x11d [i915]
[ 601.383493] [<ffffffffa00aff0a>] ? intel_connector_dpms+0x3f/0x4a [i915]
[ 601.383508] [<ffffffffa004d32f>] ? drm_fb_helper_dpms.isra.7+0x83/0xd0
[drm_kms_helper]
[ 601.383515] [<ffffffffa004d3ae>] ? drm_fb_helper_blank+0x32/0x3c
[drm_kms_helper]
[ 601.383518] [<ffffffff8135e287>] ? fb_blank+0x51/0x84
[ 601.383523] [<ffffffff81356f60>] ? fbcon_blank+0x119/0x230
[ 601.383527] [<ffffffff8103ffd1>] ? lock_timer_base.isra.37+0x23/0x47
[ 601.383531] [<ffffffff8104003b>] ? try_to_del_timer_sync+0x46/0x51
[ 601.383535] [<ffffffff813aae31>] ? do_blank_screen+0x184/0x24f
[ 601.383539] [<ffffffff813ad35b>] ? console_callback+0xc6/0xed
[ 601.383543] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 601.383547] [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[ 601.383551] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 601.383555] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 601.383559] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 601.383562] [<ffffffff8177e97c>] ? ret_from_fork+0x7c/0xb0
[ 601.383566] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 601.383568] ---[ end trace cf182eec4eb7331a ]---
[ 601.602051] WARNING: CPU: 0 PID: 1096 at drivers/gpu/drm/i915/intel_dp.c:370
intel_dp_aux_ch+0xa2/0x5ae [i915]()
[ 601.602052] eDP powered off while attempting aux channel communication.
[ 601.602076] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm pcspkr serio_raw snd_timer
snd soundcore battery ac option usb_wwan usbserial i915 video button
drm_kms_helper drm
[ 601.602079] CPU: 0 PID: 1096 Comm: kworker/0:1 Tainted: G W
3.15.0-rc8_drm-intel-next-queued_9c33ba_20140620+ #3734
[ 601.602083] Workqueue: events console_callback
[ 601.602087] 0000000000000000 0000000000000009 ffffffff81772baa
ffff8800731af9b8
[ 601.602090] ffffffff81036e54 00000000000c0000 ffffffffa00c26c3
00000000000c0000
[ 601.602093] ffff8800774b78d8 ffff880002c80000 ffff880002c80000
0000000000000001
[ 601.602094] Call Trace:
[ 601.602099] [<ffffffff81772baa>] ? dump_stack+0x41/0x51
[ 601.602103] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 601.602130] [<ffffffffa00c26c3>] ? intel_dp_aux_ch+0xa2/0x5ae [i915]
[ 601.602134] [<ffffffff81036f04>] ? warn_slowpath_fmt+0x45/0x4a
[ 601.602162] [<ffffffffa00c26c3>] ? intel_dp_aux_ch+0xa2/0x5ae [i915]
[ 601.602190] [<ffffffffa00b488f>] ? vlv_sideband_rw+0x21f/0x2bb [i915]
[ 601.602194] [<ffffffff8104003b>] ? try_to_del_timer_sync+0x46/0x51
[ 601.602222] [<ffffffffa00c2cc6>] ? intel_dp_aux_transfer+0xf7/0x11f [i915]
[ 601.602226] [<ffffffff81777332>] ? mutex_lock+0x9/0x25
[ 601.602232] [<ffffffffa004a450>] ? drm_dp_dpcd_access+0x61/0xe7
[drm_kms_helper]
[ 601.602260] [<ffffffffa009993c>] ? chv_read64+0x221/0x221 [i915]
[ 601.602266] [<ffffffffa004a4e9>] ? drm_dp_dpcd_write+0x13/0x17
[drm_kms_helper]
[ 601.602293] [<ffffffffa00c359b>] ? intel_dp_sink_dpms+0x35/0x8f [i915]
[ 601.602321] [<ffffffffa00c3627>] ? intel_disable_dp+0x32/0x5a [i915]
[ 601.602349] [<ffffffffa00ad1db>] ? i9xx_crtc_disable+0x69/0x3c8 [i915]
[ 601.602378] [<ffffffffa00a7771>] ? intel_crtc_update_dpms+0xbd/0x11d [i915]
[ 601.602406] [<ffffffffa00aff0a>] ? intel_connector_dpms+0x3f/0x4a [i915]
[ 601.602413] [<ffffffffa004d32f>] ? drm_fb_helper_dpms.isra.7+0x83/0xd0
[drm_kms_helper]
[ 601.602419] [<ffffffffa004d3ae>] ? drm_fb_helper_blank+0x32/0x3c
[drm_kms_helper]
[ 601.602422] [<ffffffff8135e287>] ? fb_blank+0x51/0x84
[ 601.602427] [<ffffffff81356f60>] ? fbcon_blank+0x119/0x230
[ 601.602431] [<ffffffff8103ffd1>] ? lock_timer_base.isra.37+0x23/0x47
[ 601.602435] [<ffffffff8104003b>] ? try_to_del_timer_sync+0x46/0x51
[ 601.602439] [<ffffffff813aae31>] ? do_blank_screen+0x184/0x24f
[ 601.602443] [<ffffffff813ad35b>] ? console_callback+0xc6/0xed
[ 601.602447] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 601.602451] [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[ 601.602455] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 601.602459] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 601.602463] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 601.602466] [<ffffffff8177e97c>] ? ret_from_fork+0x7c/0xb0
[ 601.602470] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 601.602472] ---[ end trace cf182eec4eb7331e ]---
==Reproduce steps==
----------------------------
1. Boot the device with eDP</pre>
</div>
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