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c4f3f114e7
VGA connectors don't support any hotplug detection, so the kernel needs to periodically poll them to see if a display is connected. DVI-I connectors have hotplug detection for digital signals, and some analog DVI cables pull up that pin to work with that. However, in general not all DVI cables do this so we can't rely on this feature, therefore we need to poll DVI-I connectors as well. v2: Call drm_kms_helper_poll_fini in amdgpu_dm_hpd_fini. Disable/enable polling on suspend/resume. Don't call full link detection when already connected. v3: Encounter CLANG build failure. Remove unused variable: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c:980:7: error: variable 'use_polling' set but not used [-Werror,-Wunused-but- set-variable] 980 | bool use_polling = false; Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Signed-off-by: Wayne Lin <wayne.lin@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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.