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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 - [SNB,IVB,HSW,BDW] RPM wakeref not held during HW access (intel_connector_get_hw_state)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93439">93439</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SNB,IVB,HSW,BDW] RPM wakeref not held during HW access (intel_connector_get_hw_state)
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>critical
</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>imre.deak@intel.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>The WARN below started to appeared after we added stricter RPM reference
checking asserts. It happens with CRT, LVDS, HDMI, DDI output types. There may
be additional platforms/testcases affected than the ones listed, since a
preceeding unrelated error message may suppress any further errors (we use
WARN_ONCE). Testcases which triggered this WARN or similar one with
intel_connector_get_hw_state/intel_ddi_connector_get_hw_state during CI runs:
SNB:
igt@kms_flip@basic-flip-vs-wf_vblank
igt@kms_pipe_crc_basic@read-crc-pipe-a
igt@kms_pipe_crc_basic@read-crc-pipe-b
igt@kms_setmode@basic-clone-single-crtc
igt@kms_pipe_crc_basic@suspend-read-crc-pipe-b
IVB:
igt@kms_flip@basic-flip-vs-wf_vblank
igt@kms_pipe_crc_basic@read-crc-pipe-a
igt@pm_rpm@basic-pci-d3-state
igt@pm_rpm@basic-rte
HSW:
igt@kms_flip@basic-flip-vs-modeset
igt@kms_flip@basic-flip-vs-wf_vblank
BDW:
igt@kms_flip@basic-flip-vs-wf_vblank
igt@kms_flip@basic-plain-flip
igt@kms_pipe_crc_basic@read-crc-pipe-c-frame-sequence
igt@pm_rpm@basic-pci-d3-state
[ 66.151038] ------------[ cut here ]------------
[ 66.151071] WARNING: CPU: 0 PID: 5743 at
drivers/gpu/drm/i915/intel_drv.h:1446 gen6_read32+0x238/0x2b0 [i915]()
[ 66.151073] RPM wakelock ref not held during HW access
[ 66.151075] Modules linked in:
[ 66.151077] x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul
i915 crc32_pclmul mei_me mei lpc_ich broadcom bcm_phy_lib tg3 ptp pps_core
[ 66.151093] CPU: 0 PID: 5743 Comm: kms_flip Tainted: G U
4.4.0-rc5-gfxbench+ #1
[ 66.151095] Hardware name: Dell Inc. XPS 8300 /0Y2MRG, BIOS A06 10/17/2011
[ 66.151097] ffffffffa0186860 ffff8800c06e3aa0 ffffffff813e000c
ffff8800c06e3ae8
[ 66.151102] ffff8800c06e3ad8 ffffffff810746a1 00000000000e1100
ffff88012966f478
[ 66.151106] ffff8800bf2a0000 0000000000000001 ffff8800bf2a0000
ffff8800c06e3b38
[ 66.151111] Call Trace:
[ 66.151117] [<ffffffff813e000c>] dump_stack+0x4e/0x82
[ 66.151121] [<ffffffff810746a1>] warn_slowpath_common+0x81/0xc0
[ 66.151124] [<ffffffff81074727>] warn_slowpath_fmt+0x47/0x50
[ 66.151129] [<ffffffff810c5a3d>] ? trace_hardirqs_on+0xd/0x10
[ 66.151148] [<ffffffffa00f6b28>] gen6_read32+0x238/0x2b0 [i915]
[ 66.151154] [<ffffffff81796919>] ? mutex_unlock+0x9/0x10
[ 66.151177] [<ffffffffa0134ee5>] intel_crt_get_hw_state+0x55/0x90 [i915]
[ 66.151252] [<ffffffffa011bf33>] intel_connector_get_hw_state+0x23/0x30
[i915]
[ 66.151273] [<ffffffffa011a63e>] intel_atomic_commit+0xa3e/0x17f0 [i915]
[ 66.151280] [<ffffffff8150e142>] ? drm_atomic_check_only+0x142/0x600
[ 66.151287] [<ffffffff8150ed17>] ?
drm_atomic_add_affected_connectors+0x87/0xf0
[ 66.151292] [<ffffffff8150e632>] drm_atomic_commit+0x32/0x50
[ 66.151298] [<ffffffff814eb705>] drm_atomic_helper_set_config+0x75/0xb0
[ 66.151303] [<ffffffff814fd640>] drm_mode_set_config_internal+0x60/0x110
[ 66.151308] [<ffffffff815023d6>] drm_mode_setcrtc+0x186/0x4f0
[ 66.151314] [<ffffffff811844f8>] ? __might_fault+0x48/0xa0
[ 66.151320] [<ffffffff814f450d>] drm_ioctl+0x13d/0x590
[ 66.151325] [<ffffffff81502250>] ? drm_mode_setplane+0x1b0/0x1b0
[ 66.151330] [<ffffffff811d53ec>] do_vfs_ioctl+0x2fc/0x550
[ 66.151335] [<ffffffff8118dbca>] ? vm_munmap+0x4a/0x60
[ 66.151340] [<ffffffff811e0e5a>] ? __fget_light+0x6a/0x90
[ 66.151344] [<ffffffff811d567c>] SyS_ioctl+0x3c/0x70
[ 66.151349] [<ffffffff8179a45b>] entry_SYSCALL_64_fastpath+0x16/0x73
[ 66.151354] ---[ end trace e8574724e8332771 ]---</pre>
</div>
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