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drm/i915: Replace custom intel runtime_pm tracker with ref_tracker library

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Beside reusing existing code, the main advantage of ref_tracker is
tracking per instance of wakeref. It allows also to catch double
put.
On the other side we lose information about the first acquire and
the last release, but the advantages outweigh it.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030-ref_tracker_i915-v1-1-006fe6b96421@intel.com
This commit is contained in:
Andrzej Hajda
2023-10-30 18:40:12 +01:00
parent dfed6b58d5
commit b49e894c3f
7 changed files with 86 additions and 217 deletions
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4
drivers/gpu/drm/i915/Kconfig.debug
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@@ -24,7 +24,9 @@ config DRM_I915_DEBUG
select DEBUG_FS
select PREEMPT_COUNT
select I2C_CHARDEV
select REF_TRACKER
select STACKDEPOT
select STACKTRACE
select DRM_DP_AUX_CHARDEV
select X86_MSR # used by igt/pm_rpm
select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks)
@@ -231,7 +233,9 @@ config DRM_I915_DEBUG_RUNTIME_PM
bool "Enable extra state checking for runtime PM"
depends on DRM_I915
default n
select REF_TRACKER
select STACKDEPOT
select STACKTRACE
help
Choose this option to turn on extra state checking for the
runtime PM functionality. This may introduce overhead during