[PATCH v2] drm/vkms: update the current status of todo list
Rodrigo Siqueira
rodrigosiqueiramelo at gmail.com
Wed Jun 30 00:13:57 UTC 2021
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 at 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:
> - 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.
> --
> 2.30.2
>
Reviewed-by: Rodrigo Siqueira <rodrigosiqueiramelo at gmail.com>
Thanks
--
Rodrigo Siqueira
https://siqueira.tech
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20210629/e2d8c2c2/attachment-0001.sig>
More information about the dri-devel
mailing list