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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] WARN_ON(p->pixel_rate == 0) drivers/gpu/drm/i915/intel_pm.c:3325 skl_update_pipe_wm+0x791/0x7d0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91910">91910</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SKL] WARN_ON(p->pixel_rate == 0) drivers/gpu/drm/i915/intel_pm.c:3325 skl_update_pipe_wm+0x791/0x7d0
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>joe.yasi@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>System Environment:
Motherboard: Asus Z170-DELUXE
CPU: Intel i7-6700K
BIOS: 0801
Kernel: drm-intel-next-fixes @ 4e3d1e26c2b2c40ebff69f2825fa862bfcf082d1
"drm/i915: Pass hpd_status_i915[] to intel_get_hpd_pins() in pre-g4x"
or
drm-intel-nightly @ 3ce7c1a35a31451cf48e9a27129e60ccc717c061
"drm-intel-nightly: 2015y-09m-04d-08h-44m-09s UTC integration manifest"
Description:
On boot, I get a warning in the log that p->pixel_rate == 0 at
drivers/gpu/drm/i915/intel_pm.c:3326 skl_update_pipe_wm+0x7af/0x7c0
[i915](). This occurs just after drm says "failed to retrieve link info,
disabling eDP". The monitor is a 1080p monitor connected via a HDMI-to-DVI
cable to the HDMI 2.0 port on the motherboard. HDMI 2.0 is provided by the
motherboard with an embedded eDP to HDMI 2.0 adapter.
Syslog:
[ 1.782469] [drm] Initialized drm 1.1.0 20060810
[ 1.807782] [drm] Memory usable by graphics device = 4096M
[ 1.810838] [drm] VT-d active for gfx access
[ 1.813784] [drm] Replacing VGA console driver
[ 1.824170] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.827424] [drm] Driver supports precise vblank timestamp query.
[ 1.836101] vgaarb: device changed decodes:
PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 1.882875] [drm] failed to retrieve link info, disabling eDP
[ 1.886015] ------------[ cut here ]------------
[ 1.888895] WARNING: CPU: 0 PID: 172 at
drivers/gpu/drm/i915/intel_pm.c:3326 skl_update_pipe_wm+0x7af/0x7c0
[i915]()
[ 1.894879] WARN_ON(p->pixel_rate == 0)
[ 1.894919] Modules linked in:
[ 1.904040] bcache igb crc32c_intel hwmon psmouse dca e1000e(+)
i915(+) ptp drm_kms_helper pps_core syscopyarea i2c_algo_bit
sysfillrect sysimgblt fb_sys_fops drm i2c_core sr_mod intel_gtt cdrom
sg agpgart fan thermal video button
[ 1.907216] CPU: 0 PID: 172 Comm: systemd-udevd Not tainted
4.2.0-drmintelnightly-customhwl #1
[ 1.910529] Hardware name: System manufacturer System Product
Name/Z170-DELUXE, BIOS 0801 08/21/2015
[ 1.913669] 0000000000000000 ffffffffc01e1560 ffffffff815a353d
ffff88045eb73568
[ 1.917006] ffffffff81046de7 0000000000000000 ffff88045e5497de
0000000000000002
[ 1.920158] ffff88045eb73856 ffff88045eb73730 ffffffff81046e65
ffffffffc01f1aa0
[ 1.923290] Call Trace:
[ 1.926404] [<ffffffff815a353d>] ? dump_stack+0x47/0x67
[ 1.929552] [<ffffffff81046de7>] ? warn_slowpath_common+0x77/0xb0
[ 1.932770] [<ffffffff81046e65>] ? warn_slowpath_fmt+0x45/0x50
[ 1.935902] [<ffffffff81337e69>] ? idr_get_empty_slot+0x189/0x380
[ 1.939046] [<ffffffffc012ff5f>] ? skl_update_pipe_wm+0x7af/0x7c0 [i915]
[ 1.942195] [<ffffffffc01303ab>] ? skl_update_wm+0x10b/0x610 [i915]
[ 1.945316] [<ffffffff810dd73f>] ? __alloc_pages_nodemask+0x10f/0x7a0
[ 1.948501] [<ffffffff8133f3a6>] ? string.isra.4+0x36/0xc0
[ 1.951850] [<ffffffffc019a8b2>] ? skl_disable_plane+0xb2/0xd0 [i915]
[ 1.954991] [<ffffffffc018f1df>] ?
intel_modeset_setup_hw_state+0x89f/0xcf0 [i915]
[ 1.958091] [<ffffffffc008ba7e>] ?
drm_modeset_lock_all_crtcs+0x8e/0xa0 [drm]
[ 1.961121] [<ffffffffc0191153>] ? intel_modeset_init+0xad3/0x1990 [i915]
[ 1.964130] [<ffffffffc0121d87>] ? gen8_irq_postinstall+0x267/0x320 [i915]
[ 1.967126] [<ffffffffc01c6be9>] ? i915_driver_load+0xed9/0x14f0 [i915]
[ 1.970119] [<ffffffff815293cf>] ? netlink_broadcast_filtered+0x12f/0x3b0
[ 1.973087] [<ffffffff81339980>] ? cleanup_uevent_env+0x10/0x10
[ 1.976029] [<ffffffff81339c86>] ? kobject_uevent_env+0xf6/0x520
[ 1.978935] [<ffffffff8159e4ef>] ? klist_add_tail+0x1f/0x50
[ 1.981808] [<ffffffff81400da4>] ? device_add+0x204/0x5a0
[ 1.984709] [<ffffffffc0077607>] ? drm_dev_register+0x97/0xa0 [drm]
[ 1.987566] [<ffffffffc0079f94>] ? drm_get_pci_dev+0x84/0x1d0 [drm]
[ 1.990425] [<ffffffff8140c497>] ? __pm_runtime_resume+0x47/0x60
[ 1.993249] [<ffffffff8136daaf>] ? pci_device_probe+0x6f/0xc0
[ 1.996069] [<ffffffff8140388f>] ? driver_probe_device+0x12f/0x2d0
[ 1.998891] [<ffffffff81403aa6>] ? __driver_attach+0x76/0x80
[ 2.001701] [<ffffffff81403a30>] ? driver_probe_device+0x2d0/0x2d0
[ 2.004487] [<ffffffff81401b95>] ? bus_for_each_dev+0x55/0x90
[ 2.007259] [<ffffffff814030aa>] ? bus_add_driver+0x1aa/0x220
[ 2.010013] [<ffffffffc0215000>] ? 0xffffffffc0215000
[ 2.012779] [<ffffffff8140424a>] ? driver_register+0x5a/0xe0
[ 2.015565] [<ffffffff810002d0>] ? do_one_initcall+0x90/0x1e0
[ 2.018337] [<ffffffff815a1888>] ? do_init_module+0x50/0x1d6
[ 2.021091] [<ffffffff810aaf1a>] ? load_module+0x1c9a/0x20c0
[ 2.023829] [<ffffffff810a8020>] ? __symbol_put+0x50/0x50
[ 2.026535] [<ffffffff81100f5a>] ? do_mmap_pgoff+0x2fa/0x3e0
[ 2.029218] [<ffffffff810ab4a6>] ? SyS_finit_module+0x66/0x70
[ 2.031893] [<ffffffff815a8e9b>] ? entry_SYSCALL_64_fastpath+0x16/0x6e
[ 2.034630] ---[ end trace 310cfca5c3452d55 ]---
[ 2.037318] [drm:drm_calc_timestamping_constants [drm]] *ERROR*
crtc 21: Can't calculate constants, dotclock = 0!
[ 2.061573] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 2.088374] fbcon: inteldrmfb (fb1) is primary device
[ 2.088374] fbcon: Remapping primary device, fb1, to tty 1-63
[ 2.324985] i915 0000:00:02.0: fb1: inteldrmfb frame buffer device
[ 3.744558] [drm] RC6 on</pre>
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