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Marek Report a possible irq lock inversion dependency warning when commit81a06f1d02("Revert "drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume"") lands linux-next. I can reproduce this warning with: CONFIG_PROVE_LOCKING=y CONFIG_DEBUG_LOCKDEP=y It seems than when use regmap_reinit_cache at runtime whith Mark's commit3d59c22bbb("drm/rockchip: vop2: Convert to use maple tree register cache"), it will trigger a possible irq lock inversion dependency warning. One solution is switch back to REGCACHE_RBTREE, but it seems that REGCACHE_MAPLE is the future, so I avoid using regmap_reinit_cache, and drop all the regcache when vop is disabled, then we get a fresh start at next enbable time. Fixes:81a06f1d02("Revert "drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume"") Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Closes: https://lore.kernel.org/all/98a9f15d-30ac-47bf-9b93-3aa2c9900f7b@samsung.com/ Signed-off-by: Andy Yan <andy.yan@rock-chips.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> [dropped the large kernel log of the lockdep report from the message] Signed-off-by: Heiko Stuebner <heiko@sntech.de> Link: https://patchwork.freedesktop.org/patch/msgid/20231217084415.2373043-1-andyshrk@163.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.