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drm/vkms: Update testing with IGT IGT_DEVICE 

VKMS is no longer in the platform bus, instead, it is in the faux bus.

In addition, when present, IGT picks hardware drivers instead of virtual
drivers, like VKMS or vgem, if they are not forced.

Update the documentation to use IGT_FORCE_DRIVER instead of IGT_DEVICE.

Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Link: https://lore.kernel.org/r/20251024110014.4614-2-jose.exposito89@gmail.com
Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
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José Expósito 2025-10-24 13:00:05 +02:00 committed by Louis Chauvet
parent edcdd00099
commit b63300ac40
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1 changed files with 8 additions and 11 deletions
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19
Documentation/gpu/vkms.rst
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@ -159,26 +159,23 @@ To return to graphical mode, do::
sudo systemctl isolate graphical.target
Once you are in text only mode, you can run tests using the --device switch
or IGT_DEVICE variable to specify the device filter for the driver we want
to test. IGT_DEVICE can also be used with the run-tests.sh script to run the
Once you are in text only mode, you can run tests using the IGT_FORCE_DRIVER
variable to specify the device filter for the driver we want to test.
IGT_FORCE_DRIVER can also be used with the run-tests.sh script to run the
tests for a specific driver::
sudo ./build/tests/<name of test> --device "sys:/sys/devices/platform/vkms"
sudo IGT_DEVICE="sys:/sys/devices/platform/vkms" ./build/tests/<name of test>
sudo IGT_DEVICE="sys:/sys/devices/platform/vkms" ./scripts/run-tests.sh -t <name of test>
sudo IGT_FORCE_DRIVER="vkms" ./build/tests/<name of test>
sudo IGT_FORCE_DRIVER="vkms" ./scripts/run-tests.sh -t <name of test>
For example, to test the functionality of the writeback library,
we can run the kms_writeback test::
sudo ./build/tests/kms_writeback --device "sys:/sys/devices/platform/vkms"
sudo IGT_DEVICE="sys:/sys/devices/platform/vkms" ./build/tests/kms_writeback
sudo IGT_DEVICE="sys:/sys/devices/platform/vkms" ./scripts/run-tests.sh -t kms_writeback
sudo IGT_FORCE_DRIVER="vkms" ./build/tests/kms_writeback
sudo IGT_FORCE_DRIVER="vkms" ./scripts/run-tests.sh -t kms_writeback
You can also run subtests if you do not want to run the entire test::
sudo ./build/tests/kms_flip --run-subtest basic-plain-flip --device "sys:/sys/devices/platform/vkms"
sudo IGT_DEVICE="sys:/sys/devices/platform/vkms" ./build/tests/kms_flip --run-subtest basic-plain-flip
sudo IGT_FORCE_DRIVER="vkms" ./build/tests/kms_flip --run-subtest basic-plain-flip
Testing With KUnit
==================