[PATCH 0/4] drm: Revert and fix enable/disable sequence

[Linus Walleij]

On Fri, Dec 5, 2025 at 10:52 AM Tomi Valkeinen
<tomi.valkeinen at ideasonboard.com> wrote:

> Changing the enable/disable sequence in commit c9b1150a68d9
> ("drm/atomic-helper: Re-order bridge chain pre-enable and post-disable")
> has caused regressions on multiple platforms: R-Car, MCDE, Rockchip.
>
> This is an alternate series to Linus' series:
>
> https://lore.kernel.org/all/20251202-mcde-drm-regression-thirdfix-v6-0-f1bffd4ec0fa%40kernel.org/
>
> This series first reverts the original commit and reverts a fix for
> mediatek which is no longer needed. It then exposes helper functions
> from DRM core, and finally implements the new sequence only in the tidss
> driver.
>
> There is one more fix in upstream for the original commit, commit
> 5d91394f2361 ("drm/exynos: fimd: Guard display clock control with
> runtime PM calls"), but I have not reverted that one as it looks like a
> valid patch in its own.
>
> I added Cc stable v6.17+ to all patches, but I didn't add Fixes tags, as
> I wasn't sure what should they point to. But I could perhaps add Fixes:
> <original commit> to all of these.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>

The series:
Reviewed-by: Linus Walleij <linusw at kernel.org>
Tested-by: Linus Walleij <linusw at kernel.org>

In my opinion Laurent is the more senior maintainer and my
trust level in him is the highest of all the maintainers, so
I think we should apply this revert series if
Laurent ACKs that this is what he thinks is best for DRI.

Yours,
Linus Walleij