drm_hwcomposer: Dynamic DrmDisplayPipeline to HwcDisplay bindings

The following use scenarios are now possible:

1. When no display connected, primary HwcDisplay is created in headless
   mode.

2. When user connects first display, it binds to primary slot, replacing
   headless HwcDisplay.

3. When user connects another display it binds to the new HwcDisplay
   slot, creating new display for the framework.

4. When user disconnects first (Primary) display, drm_hwc detaches
   second display and attaches it to the Primary slot. In this case
   framework is notified as Primary display resolution updated
   (Plugged->Plugged transition). And second display is disconnected
   (Plugged->Unplugged transition).

DrmDisplayPipeline is now created on demand (after hotplug event).

HwcDisplay class is now destructed on connector unplug, which will give
us ability to destroy any resource caches (will be required for FB
caching logic).

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
12 files changed
tree: f43fd0c28e18c221003c452cdb22126d72ba8fec
  1. .ci/
  2. backend/
  3. bufferinfo/
  4. compositor/
  5. drm/
  6. hwc2_device/
  7. include/
  8. tests/
  9. utils/
  10. .clang-format
  11. .clang-tidy
  12. .gitlab-ci.yml
  13. Android.bp
  14. build_deploy.sh
  15. MODULE_LICENSE_APACHE2
  16. NOTICE
  17. presubmit.sh
  18. README.md
README.md

drm_hwcomposer

Patches to drm_hwcomposer are very much welcome, we really want this to be the universal HW composer implementation for Android and similar platforms. So please bring on porting patches, bugfixes, improvements for documentation and new features.

A short list of contribution guidelines:

  • Submit changes via gitlab merge requests on gitlab.freedesktop.org.

  • drm_hwcomposer is Apache 2.0 Licensed and we require contributions to follow the developer's certificate of origin: http://developercertificate.org/.

  • When submitting new code please follow the naming conventions documented in the generated documentation. Also please make full use of all the helpers and convenience macros provided by drm_hwcomposer. The below command can help you with formatting of your patches:

    git diff | clang-format-diff-13 -p 1 -style=file
    
  • Hardware specific changes should be tested on relevant platforms before committing.

If you need inspiration, please checkout our TODO issues.

Happy hacking!