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47382485ba
Remove intel_dp_mst_suspend/resume from runtime suspend resume
sequences. It is incorrect as it depends on AUX transfers which
itself depend on the device being runtime resumed. This is
also why we see a lock_dep splat here.
<4> [76.011119] kworker/4:2/192 is trying to acquire lock:
<4> [76.011122] ffff8881120b3210 (&mgr->lock#2){+.+.}-{3:3}, at:
drm_dp_mst_topology_mgr_suspend+0x33/0xd0 [drm_display_helper]
<4> [76.011142]
but task is already holding lock:
<4> [76.011144] ffffffffa0bc3420
(xe_pm_runtime_lockdep_map){+.+.}-{0:0}, at:
xe_pm_runtime_suspend+0x51/0x3f0 [xe]
<4> [76.011223]
which lock already depends on the new lock.
<4> [76.011226]
the existing dependency chain (in reverse order) is:
<4> [76.011229]
-> #2 (xe_pm_runtime_lockdep_map){+.+.}-{0:0}:
<4> [76.011233] pm_runtime_lockdep_prime+0x2f/0x50 [xe]
<4> [76.011306] xe_pm_runtime_resume_and_get+0x29/0x90 [xe]
<4> [76.011377] intel_display_power_get+0x24/0x70 [xe]
<4> [76.011466] intel_digital_port_connected_locked+0x4c/0xf0
[xe]
<4> [76.011551] intel_dp_aux_xfer+0xb8/0x7c0 [xe]
<4> [76.011633] intel_dp_aux_transfer+0x166/0x2e0 [xe]
<4> [76.011715] drm_dp_dpcd_access+0x87/0x150
[drm_display_helper]
<4> [76.011726] drm_dp_dpcd_probe+0x3d/0xf0 [drm_display_helper]
<4> [76.011737] drm_dp_dpcd_read+0xdd/0x130 [drm_display_helper]
<4> [76.011747] intel_dp_get_colorimetry_status+0x3a/0x70 [xe]
<4> [76.011886] intel_dp_init_connector+0x4ff/0x1030 [xe]
<4> [76.011969] intel_ddi_init+0xc5b/0x1030 [xe]
<4> [76.012058] intel_bios_for_each_encoder+0x36/0x60 [xe]
<4> [76.012145] intel_setup_outputs+0x201/0x460 [xe]
<4> [76.012233] intel_display_driver_probe_nogem+0x155/0x1e0 [xe]
<4> [76.012320] xe_display_init_noaccel+0x27/0x70 [xe]
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240912012545.702032-2-suraj.kandpal@intel.com
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.