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e317a69fe8
Implement fbdev emulation on top of struct drm_client and its helpers. Replaces ad-hoc interfaces for restoring and closing fbdev emulation with per-client callbacks for hotplugging, restoring and unregistering. A single function, radeon_fbdev_setup(), starts fbdev emulation after the DRM device has been registered. Hence, fbdev acts like a regular DRM client. The setup call prepares the fbdev emulation and invokes connector hotplugging. The first successful hotplug event initializes fbdev emulation with a framebuffer, device file, etc. Unregistering depends on the hotplug status. Fully initialized emulation is cleaned up through drm_fb_helper_unregister_info() and fb_destroy. For prepared-only setups, unregistering unprepares the emulation and releases all resources. In both cases, fbdev emulation will be cleaned up. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> 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 Restructured Text 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.