241b507c16
Previously, dpu_crtc_frame_event_work() would try to aquire all the modeset locks in order to check whether it can release bandwidth. (If we only have cmd-mode display, bandwidth can be released at frame-done time.) The problem with this is that it is also responsible for signalling frame_done_comp, which dpu_crtc_commit_kickoff() waits on if there is already a frame pending. This is called in the msm_atomic_commit_tail() path.. which means that for non-nonblock commits, at least some of the modeset locks are already held. Re-work this scheme to use a reference count to track our need to have clocks enabled. It is incremented for each atomic commit, and decremented in the corresponding frame-done. Additionally, any crtc used in video mode hold an extra reference while they are enabled. The net effect is that we can determine in frame-done whether it is safe to drop bandwidth without needing to aquire any modeset locks. Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Sean Paul <sean@chromium.org> Signed-off-by: Rob Clark <robdclark@chromium.org> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
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| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
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.