On 06/26, Melissa Wen wrote:
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/
v2:
- add task to enable multiple overlay planes (Simon)
Signed-off-by: Melissa Wen melissa.srw@gmail.com
Documentation/gpu/vkms.rst | 38 ++++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-)
diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst index 2c9b376da5ca..941f0e7e5eef 100644 --- a/Documentation/gpu/vkms.rst +++ b/Documentation/gpu/vkms.rst @@ -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:
+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.
-- 2.30.2
Reviewed-by: Rodrigo Siqueira rodrigosiqueiramelo@gmail.com
Thanks