[Bug 106207] [CI] igt at kms_* - dmesg-warn - unknown DP link BW code .., using 162000

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106207

Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CLOSED                      |REOPENED
           Priority|medium                      |high
         Resolution|WORKSFORME                  |---

--- Comment #3 from Martin Peres <martin.peres at free.fr> ---
It's back, and it spammed one fast feedback run (tens of tests):

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_4451_74/fi-bsw-n3050/igt@gem_exec_suspend@basic-s3.html

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_4451_74/fi-bsw-n3050/igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size.html

...

[  449.449754] WARNING: CPU: 0 PID: 25 at drivers/gpu/drm/drm_dp_helper.c:173
drm_dp_bw_code_to_link_rate+0x3b/0x50
[  449.449764] ---[ end trace 6bd9f326a24d40c7 ]---
[  449.672376] ------------[ cut here ]------------
[  449.672389] unknown DP link BW code 11, using 162000
[  449.672442] WARNING: CPU: 0 PID: 25 at drivers/gpu/drm/drm_dp_helper.c:173
drm_dp_bw_code_to_link_rate+0x3b/0x50
[  449.672454] Modules linked in: vgem btusb btrtl btbcm btintel bluetooth
snd_hda_codec_hdmi ecdh_generic snd_hda_codec_realtek snd_hda_codec_generic
i915 intel_powerclamp coretemp snd_hda_intel crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm r8169 mii
lpc_ich prime_numbers pinctrl_cherryview
[  449.672758] CPU: 0 PID: 25 Comm: kworker/0:1 Tainted: G     U  W        
4.18.0-rc3-g7ae7763aa2be-repeat_6+ #1
[  449.672770] Hardware name:  /NUC5CPYB, BIOS PYBSWCEL.86A.0058.2016.1102.1842
11/02/2016
[  449.672927] Workqueue: events i915_hpd_poll_init_work [i915]
[  449.672954] RIP: 0010:drm_dp_bw_code_to_link_rate+0x3b/0x50
[  449.672965] Code: 74 0b 40 80 ff 1e b8 10 5c 0c 00 75 0d f3 c3 40 80 ff 06
b8 d0 78 02 00 74 f3 40 0f b6 f7 48 c7 c7 30 a1 0c 98 e8 15 52 aa ff <0f> 0b b8
d0 78 02 00 c3 b8 b0 1e 04 00 c3 0f 1f 80 00 00 00 00 48 
[  449.673575] RSP: 0018:ffffb219c00ebc98 EFLAGS: 00010282
[  449.673597] RAX: 0000000000000000 RBX: ffff920c250c8110 RCX:
0000000000000001
[  449.673608] RDX: 0000000080000001 RSI: ffffffff98085066 RDI:
00000000ffffffff
[  449.673618] RBP: ffff920c250c8110 R08: 00000000a8b3493f R09:
0000000000000000
[  449.673630] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff920c24200000
[  449.673641] R13: ffff920c24486678 R14: 0000000000000001 R15:
0000000000000000
[  449.673652] FS:  0000000000000000(0000) GS:ffff920c3fc00000(0000)
knlGS:0000000000000000
[  449.673664] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  449.673675] CR2: 00007f3878168000 CR3: 0000000163c80000 CR4:
00000000001006f0
[  449.673685] Call Trace:
[  449.673838]  intel_dp_set_sink_rates+0xd/0x70 [i915]
[  449.673990]  intel_dp_get_dpcd.part.33+0x27/0xd0 [i915]
[  449.674148]  intel_dp_detect+0x1af/0x4d0 [i915]
[  449.674184]  drm_helper_probe_detect_ctx+0x67/0xd0
[  449.674238]  drm_helper_hpd_irq_event+0xa5/0x120
[  449.674408]  i915_hpd_poll_init_work+0xc6/0x100 [i915]
[  449.674443]  process_one_work+0x248/0x6c0
[  449.674486]  worker_thread+0x1fb/0x380
[  449.674512]  ? process_one_work+0x6c0/0x6c0
[  449.674527]  kthread+0x119/0x130
[  449.674543]  ? kthread_flush_work_fn+0x10/0x10
[  449.674571]  ret_from_fork+0x3a/0x50
[  449.674630] irq event stamp: 591836
[  449.674646] hardirqs last  enabled at (591835): [<ffffffff970fc74c>]
console_unlock+0x3fc/0x600
[  449.674659] hardirqs last disabled at (591836): [<ffffffff97a0111c>]
error_entry+0x7c/0x100
[  449.674672] softirqs last  enabled at (591704): [<ffffffff97c0034f>]
__do_softirq+0x34f/0x505
[  449.674687] softirqs last disabled at (591695): [<ffffffff970904d9>]
irq_exit+0xa9/0xc0
[  449.674703] WARNING: CPU: 0 PID: 25 at drivers/gpu/drm/drm_dp_helper.c:173
drm_dp_bw_code_to_link_rate+0x3b/0x50
[  449.674715] ---[ end trace 6bd9f326a24d40c8 ]---

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