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intel/isl: Add a debug option to override modifer list

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Developers can limit supported modifers to a single
modifier provided in INTEL_MODIFIER_OVERRIDE environment
variable for debug purposes. For example, setting it
makes Vulkan CTS only run modifier tests against the
specified modifier instead of all modifiers in production
code.

Signed-off-by: Jianxun Zhang <jianxun.zhang@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Acked-by: Rohan Garg <rohan.garg@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25651>
This commit is contained in:
Jianxun Zhang 2023-09-21 17:09:55 -07:00 • committed by Marge Bot
parent 8f8cde4c60
commit 3b885926e9
2 changed files with 16 additions and 0 deletions
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8
docs/envvars.rst
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@ -703,6 +703,14 @@ Intel driver environment variables
``INTEL_MEASURE=cpu {workload}``
.. envvar:: INTEL_MODIFIER_OVERRIDE
if set, determines the single DRM modifier reported back to (Vulkan)
applications, in order to make selecting modifier deterministic
between Vulkan driver and applications. The value can be one of the
supported modifiers on a platform, but other values are also acceptable
for debug purposes.
.. envvar:: INTEL_NO_HW
if set to 1, true or yes, prevents batches from being submitted to the