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drm/nouveau/kms/nv50-: implement proper push buffer control logic

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We had a, what was supposed to be temporary, hack in the KMS code where we'd
completely drain an EVO/NVD channel's push buffer when wrapping to the start
again, instead of treating it as a ring buffer.

Let's fix that, finally.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2020-07-21 11:34:07 +10:00
commit 0a96099691
12 changed files with 125 additions and 78 deletions
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