[PATCH v2 0/5] tests/kms_writeback: Add clone mode subtest

[Alex Hung]

I ran a smoke test and Patch 4 (tests/kms_writeback: Disable all outputs 
after igt_display_require()) is causing a regression on my test platform:


Starting subtest: writeback-check-output-XRGB2101010
(kms_writeback:1973) CRITICAL: Test assertion failure function 
get_and_wait_out_fence, file ../tests/kms_writeback.c:345:
(kms_writeback:1973) CRITICAL: Failed assertion: ret == 0
(kms_writeback:1973) CRITICAL: Last errno: 38, Function not implemented
(kms_writeback:1973) CRITICAL: sync_fence_wait failed: Timer expired
Stack trace:
   #0 ../lib/igt_core.c:2051 __igt_fail_assert()
   #1 [get_and_wait_out_fence+0x8e]
   #2 ../tests/kms_writeback.c:401 writeback_sequence()
   #3 ../tests/kms_writeback.c:424 writeback_check_output()
   #4 ../tests/kms_writeback.c:782 __igt_unique____real_main557()
   #5 ../tests/kms_writeback.c:557 main()
   #6 ../sysdeps/nptl/libc_start_call_main.h:58 __libc_start_call_main()
   #7 ../csu/libc-start.c:128 __libc_start_main@@GLIBC_2.34()
   #8 [_start+0x25]
Subtest writeback-check-output-XRGB2101010 failed.



On 2024-08-28 21:05, Jessica Zhang wrote:
> Add a subtest that will iterate through all pairs of
> non-writeback and writeback cloned outputs and dump the writeback
> framebuffer for each pair.
> 
> This series includes:
> 
> - Fixes for properly cleaning up the kms_writeback state and forcing a
>    modeset after igt_display_require() to prevent commit failures when
>    the writeback mode is the same as the primary display mode
> - Adjust the duplicate pipe check in igt_display_refresh() to allow for
>    combinations of valid clones
> - Moving the writeback dump to its own subtest
> - Adding a subtest to dump all writeback/non-writeback cloned pairs
> 
> To dump the clone mode buffer, run the following command:
> 
> IGT_FRAME_DUMP_PATH=<dump path> FRAME_PNG_FILE_NAME=<file name> \
> 	./build/tests/kms_writeback [--run-subtest dump-valid-clones] \
> 	-dc <primary display mode>
> 
> This will output a file named <file name>-encoder<writeback encoder
> id>-encoder<primary display encoder id>
> 
> ---
> Changes in v2:
> - Corrected author email
> - Link to v1: https://lore.kernel.org/r/20240828-igt-cwb-v1-0-48aee421fc97@quicinc.com
> 
> ---
> Jessica Zhang (5):
>        tests/kms_writeback: clear writeback properties in teardown path
>        lib/igt_kms: Add helper to get encoder index
>        lib/igt_kms: loosen duplicate check in igt_display_refresh
>        tests/kms_writeback: Disable all outputs after igt_display_require()
>        tests/kms_writeback: Add dump for valid clone mode
> 
>   lib/igt_kms.c         | 57 +++++++++++++++++++++++++++++------
>   lib/igt_kms.h         |  2 ++
>   tests/kms_setmode.c   | 14 ++-------
>   tests/kms_writeback.c | 83 +++++++++++++++++++++++++++++++++++++++++++--------
>   4 files changed, 122 insertions(+), 34 deletions(-)
> ---
> base-commit: 3b6b2d238e864ff1af9e33159d3bbf4b7f01d86d
> change-id: 20240827-igt-cwb-23fd81d3a7a4
> 
> Best regards,