Hi,
I'm trying to implement the virtual hardware (virtual_hw) module option on VKMS module.
The virtual hardware module option is implemented as an option to skip the timing and vblank subtests. The main idea of virtual_hw is shorten the time used on each period of operation. For this, the timer for counting the period is eliminated and the KMS configurations are implemented along with the standard atomic operations.
During the 'atomic_enable' and 'atomic_disable' the vblank is initialized only if the virtual_hw is disabled (and therefore, the vblank is enabled). A kick of crc/vblank is decoupled from vblank_simulate. Case the vblank is disabled (that is, the vblank_simulate will never execute) a vkms_composer_work routine is added to the end of the atomic_flush.
The IGT tests used to check the patch were the kms-flip, which kept the same results, with and without my alterations, with the exceptions of the tests that required vblank. The warning message and the related tests are presented below:
Test requirement not met in function run_test_on_crtc_set, file ../tests/kms_flip.c:1285: Test requirement: vblank There is no VBlank Last errno: 95, Operation not supported - wf_vblank-ts-check - blocking-wf_vblank - absolute-wf_vblank - blocking-absolute-wf_vblank - busy-flip - plain-flip-ts-check - plain-flip-fb-recreate - flip-vs-expired-vblank - flip-vs-absolute-wf_vblank - basic-flip-vs-wf_vblank - flip-vs-blocking-wf-vblank - dpms-vs-vblank-race - modeset-vs-vblank-race - wf_vblank-ts-check-interruptible - absolute-wf_vblank-interruptible - blocking-absolute-wf_vblank-interruptible - plain-flip-ts-check-interruptible - plain-flip-fb-recreate-interruptible - flip-vs-expired-vblank-interruptible - flip-vs-absolute-wf_vblank-interruptible - flip-vs-wf_vblank-interruptible - dpms-vs-vblank-race-interruptible - modeset-vs-vblank-race-interruptible
Any suggestions are very welcome :)
Gabriela Bittencourt (2): drm/vkms: Rework vkms_vblank_simulate drm/vkms: Add 'virtual_hw' module option
drivers/gpu/drm/vkms/vkms_crtc.c | 42 +++++++++++++++++++++++++++----- drivers/gpu/drm/vkms/vkms_drv.c | 13 ++++++++-- drivers/gpu/drm/vkms/vkms_drv.h | 2 ++ 3 files changed, 49 insertions(+), 8 deletions(-)