Comment # 17
on bug 83708
from Christian König
(In reply to comment #16) > (In reply to comment #15) > > 1. I do not add cpu_to_le32() first ,but when I trace the messages from > > printk,the value of msg_type is reversed. > > That's in radeon_uvd_cs_msg()? Sounds like the Mesa UVD code writes the > messages in host byte order, not in little endian. Maybe Christian can > clarify which byte order should be used for them. The hardware supports byte swapping for the message and feedback buffer, but I think always writing/reading it in little endian will be simpler to get working. The userspace code currently doesn't supports big endian hosts and so will probably write it in the wrong byte order.
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