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The struct drm_dp_mst_topology_mgr *mgr parameter is only used for debug
logging in case the passed in link rate or lane count are zero. There's
no further error checking as such, and the function returns 0.
There should be no case where the parameters are zero. The returned
value is generally used as a divisor, and if we were hitting this, we'd
be seeing division by zero.
Just remove the debug logging altogether, along with the mgr parameter,
so that the function can be used in non-MST contexts without the
topology manager.
v2: Also remove drm_dp_mst_helper_tests_init as unnecessary (Imre)
Cc: Imre Deak <[email protected]>
Cc: Lyude Paul <[email protected]>
Reviewed-by: Imre Deak <[email protected]>
Acked-by: Maxime Ripard <[email protected]>
Acked-by: Thomas Zimmermann <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/72d77e7a7fe69c784e9df048b7e6f250fd7599e4.1735912293.git.jani.nikula@intel.com
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make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_kunit_helpers.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_buddy_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_cmdline_parser_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_connector_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_damage_helper_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_dp_mst_helper_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_exec_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_format_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_framebuffer_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_gem_shmem_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_managed_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_mm_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_modes_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_plane_helper_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_probe_helper_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/tests/drm_rect_test.o
Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <[email protected]>
Signed-off-by: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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Add kunit test cases for drm_dp_get_vc_payload_bw() with all the DP1.4
and UHBR link configurations.
v2:
- List test cases in decreasing rate,lane count order matching the
corresponding DP Standard tables. (Ville)
- Add references to the DP Standard tables.
v3:
- Sort the testcases properly.
v4:
- Avoid 'stack frame size x exceeds limit y in
drm_test_dp_mst_calc_pbn_div()' compiler warn. (LKP)
Cc: Ville Syrjälä <[email protected]>
Cc: Lyude Paul <[email protected]>
Cc: [email protected]
Cc: kernel test robot <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Acked-by: Maarten Lankhorst <[email protected]>
Reviewed-by: Ville Syrjälä <[email protected]> (v3)
Signed-off-by: Imre Deak <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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The current code does '(bpp << 4) / 16' in the MST PBN
calculation, but that is just the same as 'bpp' so the
DSC codepath achieves absolutely nothing. Fix it up so that
the fractional part of the bpp value is actually used instead
of truncated away. 64*1006 has enough zero lsbs that we can
just shift that down in the dividend and thus still manage
to stick to a 32bit divisor.
And while touching this, let's just make the whole thing more
straightforward by making the passed in bpp value .4 binary
fixed point always, instead of having to pass in different
things based on whether DSC is enabled or not.
v2:
- Fix DSC kunit test cases.
Cc: Manasi Navare <[email protected]>
Cc: Lyude Paul <[email protected]>
Cc: Harry Wentland <[email protected]>
Cc: David Francis <[email protected]>
Cc: Mikita Lipski <[email protected]>
Cc: Alex Deucher <[email protected]>
Fixes: dc48529fb14e ("drm/dp_mst: Add PBN calculation for DSC modes")
Signed-off-by: Ville Syrjälä <[email protected]>
[Imre: Fix kunit test cases]
Acked-by: Maxime Ripard <[email protected]>
Reviewed-by: Lyude Paul <[email protected]>
Acked-by: Harry Wentland <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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tests
The drm_test_dp_mst_sideband_msg_req_decode repeats the same test
structure with different parameters. This could be better represented
by parameterized tests, provided by KUnit.
In addition to the parameterization of the tests, the test case for the
client ID was changed: instead of using get_random_bytes to generate
the client ID, the client ID is now hardcoded in the test case. This
doesn't affect the assertively of the tests, as this test case only compare
the data going in with the data going out and it doesn't transform the data
itself in any way.
So, convert drm_test_dp_mst_sideband_msg_req_decode into parameterized
tests and make the tests' allocations and prints completely managed by KUnit.
Signed-off-by: Maíra Canal <[email protected]>
Reviewed-by: Michał Winiarski <[email protected]>
Signed-off-by: Maíra Canal <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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The drm_test_dp_mst_calc_pbn_mode is based on a loop that executes tests
for a couple of test cases. This could be better represented by
parameterized tests, provided by KUnit.
So, convert the drm_test_dp_mst_calc_pbn_mode into parameterized tests.
Signed-off-by: Maíra Canal <[email protected]>
Reviewed-by: Michał Winiarski <[email protected]>
Signed-off-by: Maíra Canal <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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With the introduction of KUnit, IGT is no longer the only option to run
the DRM unit tests, as the tests can be run through kunit-tool or on
real hardware with CONFIG_KUNIT.
Therefore, remove the "igt_" prefix from the tests and replace it with
the "drm_test_" prefix, making the tests' names independent from the tool
used.
Signed-off-by: Maíra Canal <[email protected]>
Acked-by: David Gow <[email protected]>
Acked-by: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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Considering the current adoption of the KUnit framework, convert the
DRM DP MST helper selftest to the KUnit API.
Co-developed-by: Rubens Gomes Neto <[email protected]>
Signed-off-by: Rubens Gomes Neto <[email protected]>
Tested-by: David Gow <[email protected]>
Acked-by: Daniel Latypov <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Signed-off-by: Maíra Canal <[email protected]>
Signed-off-by: Javier Martinez Canillas <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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