tree d58688db535ad4f4ad9552296de6d71be1f9245c
parent 671e2ee5ee2127179ca884b439ab6001a623edd6
author Shirish S <shirish.s@amd.com> 1559663703 +0530
committer Alex Deucher <alexander.deucher@amd.com> 1560277988 -0500

drm/amdgpu/{uvd,vcn}: fetch ring's read_ptr after alloc

[What]
readptr read always returns zero, since most likely
these blocks are either power or clock gated.

[How]
fetch rptr after amdgpu_ring_alloc() which informs
the power management code that the block is about to be
used and hence the gating is turned off.

Signed-off-by: Louis Li <Ching-shih.Li@amd.com>
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org