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venus: suballocate feedback slot with feedback buffer alignment

Yiwei Zhang requested to merge zzyiwei/mesa:vn-syncfb-alignment into main

What does this MR do and why?

venus: suballocate feedback slot with feedback buffer alignment

Venus sync feedback design relies on concurrent host device resource access. To avoid device flush overwriting host writes, we must suballocate the slots with a minimum size of the buffer alignment.

Cc: mesa-stable Signed-off-by: Yiwei Zhang zzyiwei@chromium.org

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