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@xxxxxxxxx> > --- > 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@xxxxxxxxx> Thanks -- Rodrigo Siqueira https://siqueira.tech
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