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drm/vkms: update the current status of todo list

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Update:
- debugging issues on igt testcases
- plane composition features: add primary plane improvements
- suggestions of good tasks to start working on vkms

Drop:
- syzkaller bug report:
  what triggered the warning was replaced by shmem functions at
  https://patchwork.freedesktop.org/patch/394614/
- overlay plane: this feature was added by
  https://patchwork.freedesktop.org/patch/430941/

Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Reviewed-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210626092655.ghmmt2yux5klrne7@smtp.gmail.com
This commit is contained in:
Melissa Wen 2021-06-26 10:26:55 +01:00
parent 97c9bfe3f6
commit fb786a48ac
1 changed files with 26 additions and 12 deletions
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36
Documentation/gpu/vkms.rst
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@ -98,9 +98,17 @@ with VKMS maintainers.
IGT better support
------------------
- Investigate: (1) test cases on kms_plane that are failing due to timeout on
capturing CRC; (2) when running kms_flip test cases in sequence, some
successful individual test cases are failing randomly.
Debugging:
- kms_plane: some test cases are failing due to timeout on capturing CRC;
- kms_flip: when running test cases in sequence, some successful individual
test cases are failing randomly; when individually, some successful test
cases display in the log the following error::
[drm:vkms_prepare_fb [vkms]] ERROR vmap failed: -4
Virtual hardware (vblank-less) mode:
- VKMS already has support for vblanks simulated via hrtimers, which can be
tested with kms_flip test; in some way, we can say that VKMS already mimics
@ -116,7 +124,17 @@ Add Plane Features
There's lots of plane features we could add support for:
- Real overlay planes, not just cursor.
- Multiple overlay planes. [Good to get started]
- Clearing primary plane: clear primary plane before plane composition (at the
start) for correctness of pixel blend ops. It also guarantees alpha channel
is cleared in the target buffer for stable crc. [Good to get started]
- ARGB format on primary plane: blend the primary plane into background with
translucent alpha.
- Support when the primary plane isn't exactly matching the output size: blend
the primary plane into the black background.
- Full alpha blending on all planes.
@ -129,13 +147,8 @@ There's lots of plane features we could add support for:
cursor api).
For all of these, we also want to review the igt test coverage and make sure
all relevant igt testcases work on vkms.
Prime Buffer Sharing
--------------------
- Syzbot report - WARNING in vkms_gem_free_object:
https://syzkaller.appspot.com/bug?extid=e7ad70d406e74d8fc9d0
all relevant igt testcases work on vkms. They are good options for internship
project.
Runtime Configuration
---------------------
@ -162,6 +175,7 @@ Writeback support
- The writeback and CRC capture operations share the use of composer_enabled
boolean to ensure vblanks. Probably, when these operations work together,
composer_enabled needs to refcounting the composer state to proper work.
[Good to get started]
- Add support for cloned writeback outputs and related test cases using a
cloned output in the IGT kms_writeback.