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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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38
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
---------------------
@ -153,7 +166,7 @@ module. Use/Test-cases:
the refresh rate.
The currently proposed solution is to expose vkms configuration through
configfs. All existing module options should be supported through configfs
configfs. All existing module options should be supported through configfs
too.
Writeback support
@ -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.