drm/tegra: dc: Restore coupling of display controllers

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Coupling of display controllers used to rely on runtime PM to take the
companion controller out of reset. Commit fd67e9c6ed ("drm/tegra: Do
not implement runtime PM") accidentally broke this when runtime PM was
removed.

Restore this functionality by reusing the hierarchical host1x client
suspend/resume infrastructure that's similar to runtime PM and which
perfectly fits this use-case.

Fixes: fd67e9c6ed ("drm/tegra: Do not implement runtime PM")
Reported-by: Dmitry Osipenko <digetx@gmail.com>
Reported-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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This commit is contained in:

Thierry Reding 2021-03-19 08:06:37 +01:00

parent a24f98176d

commit a31500fe70

1 changed files with 8 additions and 12 deletions

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drivers/gpu/drm/tegra/dc.c

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