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media: hantro: Fix picture order count table enable
authorFrancois Buergisser <fbuergisser@chromium.org>
Tue, 29 Oct 2019 01:24:48 +0000 (02:24 +0100)
committerMauro Carvalho Chehab <mchehab@kernel.org>
Sat, 9 Nov 2019 08:06:27 +0000 (09:06 +0100)
commit58c93a548b0248fad6437f8c8921f9b031c3892a
tree9ab51f2ca20023771769cd5c73ecd1e6f87cceea
parent658f9d9921d7e76af03f689b5f0ffde042b8bf5b
media: hantro: Fix picture order count table enable

The picture order count table only makes sense for profiles
higher than Baseline. This is confirmed by the H.264 specification
(See 8.2.1 Decoding process for picture order count), which
clarifies how POC are used for features not present in Baseline.

"""
Picture order counts are used to determine initial picture orderings
for reference pictures in the decoding of B slices, to represent picture
order differences between frames or fields for motion vector derivation
in temporal direct mode, for implicit mode weighted prediction in B slices,
and for decoder conformance checking.
"""

As a side note, this change matches various vendors downstream codebases,
including ChromiumOS and IMX VPU libraries.

Fixes: dea0a82f3d22 ("media: hantro: Add support for H264 decoding on G1")
Signed-off-by: Francois Buergisser <fbuergisser@chromium.org>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Tested-by: Boris Brezillon <boris.brezillon@collabora.com>
Cc: <stable@vger.kernel.org> # for v5.4 and up
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
drivers/staging/media/hantro/hantro_g1_h264_dec.c