[Bug 73951] [Bay Trail-I HPD] Hot plug detection doesn't work with Display Port

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73951

--- Comment #14 from Kenta Ueda <kenta.ueda at intel.com> ---
I tried commit 232a6ee9af8adb185640f67fcaaa9014a9aa0573 kernel, but my system
was frozen in login screen (CUI mode).
So, I tried 3.13.0-5-generic (Ubuntu 14.04 default kernel) kernel + commit
232a6ee9af8adb185640f67fcaaa9014a9aa0573 patch kernel.
HPD works with 3.13.0-5 + hotplug patch. But system doesn't show any picture
for DP monitor.

I found similar issue (bug#73477).

Here is the dmesg output. I attach all dmesg output. Thanks.
[   44.490952] ------------[ cut here ]------------$
[   44.490990] WARNING: CPU: 0 PID: 57 at
/build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:1508
vlv_wait_port_ready+0x104/0x110 [i915]()$
[   44.491000] timed out waiting for port C ready: 0xf000a0ff$
[   44.491003] Modules linked in: intel_rapl coretemp kvm_intel kvm
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw
gf128mul glue_helper ablk_helper cryptd microcode psmouse i915
serio_raw joydev drm_kms_helper dw_dmac_pci drm dw_dmac_core i2c_algo_bit
parport_pc ppdev bnep rfcomm bluetooth binfmt_misc nls_iso8859_1 video mac_hid
lp parport hid_logitech ff_memless e1000e ptp usbhid hid sdhci_pci ahci
pps_core libahci sdhci$
[   44.491097] CPU: 0 PID: 57 Comm: kworker/0:1 Not tainted 3.13.0-5-generic
#20-Ubuntu$
[   44.491106] Hardware name: Intel Corp. VALLEYVIEW B0 PLATFORM/NOTEBOOK, BIOS
BYTICRB1.X64.0072.R11.1312171421 12/17/2013$
[   44.491129] Workqueue: events i915_hotplug_work_func [i915]$
[   44.491138]  0000000000000009 ffff880136557a30 ffffffff81705069
ffff880136557a78$
[   44.491150]  ffff880136557a68 ffffffff8106467d ffff8800aaa34000
00000000000000f0$
[   44.491161]  00000000ffff0680 0000000000000001 ffff8800aa93b800
ffff880136557ac8$
[   44.491172] Call Trace:$
[   44.491187]  [<ffffffff81705069>] dump_stack+0x45/0x56$
[   44.491201]  [<ffffffff8106467d>] warn_slowpath_common+0x7d/0xa0$
[   44.491212]  [<ffffffff810646ec>] warn_slowpath_fmt+0x4c/0x50$
[   44.491244]  [<ffffffffa0212de4>] vlv_wait_port_ready+0x104/0x110 [i915]$
[   44.491276]  [<ffffffffa022ee33>] vlv_pre_enable_dp+0x113/0x160 [i915]$
[   44.491305]  [<ffffffffa0217fec>] valleyview_crtc_enable+0x12c/0x490 [i915]$
[   44.491334]  [<ffffffffa021a6c9>] __intel_set_mode+0x859/0x9c0 [i915]$
[   44.491347]  [<ffffffff81358d6f>] ? idr_get_empty_slot+0x16f/0x3c0$
[   44.491377]  [<ffffffffa021d376>] intel_set_mode+0x16/0x30 [i915]$
[   44.491407]  [<ffffffffa021dc2b>] intel_crtc_set_config+0x7ab/0x9a0 [i915]$
[   44.491433]  [<ffffffffa0183e6d>] drm_mode_set_config_internal+0x5d/0xe0
[drm]$
[   44.491450]  [<ffffffffa01c3f61>] drm_fb_helper_set_par+0x71/0xf0
[drm_kms_helper]$
[   44.491473]  [<ffffffffa0182ce2>] ? drm_modeset_unlock_all+0x52/0x60 [drm]$
[   44.491487]  [<ffffffffa01c3ee5>] drm_fb_helper_hotplug_event+0x105/0x110
[drm_kms_helper]$
[   44.491522]  [<ffffffffa025726c>] intel_fbdev_output_poll_changed+0x1c/0x20
[i915]$
[   44.491535]  [<ffffffffa01bfde7>] drm_kms_helper_hotplug_event+0x27/0x30
[drm_kms_helper]$
[   44.491558]  [<ffffffffa01e489a>] i915_hotplug_work_func+0x27a/0x360 [i915]$
[   44.491573]  [<ffffffff81080872>] process_one_work+0x182/0x450$
[   44.491584]  [<ffffffff81081611>] worker_thread+0x121/0x410$
[   44.491590]  [<ffffffff810814f0>] ? rescuer_thread+0x3e0/0x3e0$
[   44.491596]  [<ffffffff81088262>] kthread+0xd2/0xf0$
[   44.491606]  [<ffffffff81088190>] ? kthread_create_on_node+0x190/0x190$
[   44.491618]  [<ffffffff8171597c>] ret_from_fork+0x7c/0xb0$
[   44.491631]  [<ffffffff81088190>] ? kthread_create_on_node+0x190/0x190$
[   44.491635] ---[ end trace 86f6c365b130eff9 ]---$

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20140127/12521ab7/attachment.html>