drm/tegra: dc: Do not register DC without primary plane

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Tegra194 contains a fourth display controller that does not own any
windows. Therefore, we cannot currently assign a primary plane to it
which causes KMS to eventually crash. Do not register the display
controller if it owns no windows to work around this.

Note that we still have to enable and probe the display controller
because for some reason all display controllers need to be powered
(and/or clocked) before any registers can be accessed in any of the
display controllers.

Signed-off-by: Thierry Reding <treding@nvidia.com>

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This commit is contained in:

Thierry Reding 2018-09-21 12:27:42 +02:00

parent 47022003f9

commit 759d706f7c

1 changed files with 22 additions and 0 deletions

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drivers/gpu/drm/tegra/dc.c

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