drm/rockchip: vop2: Avoid use regmap_reinit_cache at runtime

Marek Report a possible irq lock inversion dependency warning when
commit 81a06f1d02e5 ("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
commit 3d59c22bbb8d ("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: 81a06f1d02e5 ("Revert "drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume"")
Reported-by: Marek Szyprowski <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Andy Yan <[email protected]>
Tested-by: Marek Szyprowski <[email protected]>
[dropped the large kernel log of the lockdep report from the message]
Signed-off-by: Heiko Stuebner <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions