On 09/08/16 11:11, Tiffany Lin wrote:
Hi Hans,
On Thu, 2016-09-08 at 09:21 +0200, Hans Verkuil wrote:
Hi Tiffany,
On 09/07/2016 08:56 AM, Tiffany Lin wrote:
This patch series add Mediatek compressed block format V4L2_PIX_FMT_MT21C, the
decoder driver will decoded bitstream to V4L2_PIX_FMT_MT21C format.
User space applications could use MT8173 MDP driver to convert V4L2_PIX_FMT_MT21C to
V4L2_PIX_FMT_NV12M, V4L2_PIX_FMT_YUV420M and V4L2_PIX_FMT_YVU420.
MDP driver[1] is stand alone driver.
Usage:
MT21C -> MT8173 MDP -> NV12M/YUV420M/YVU420
NV12M/NV21M/YUV420M/YVU420M -> mt8173 Encoder -> H264/VP8
H264/VP8/VP9 -> mtk8173 Decoder -> MT21C
When encode with MT21 source, the pipeline will be:
MT21C -> MDP driver-> NV12M/NV21M/YUV420M/YVU420M -> Encoder -> H264/VP8
When playback, the pipeline will be:
H264/VP8/VP9 -> Decoder driver -> MT21C -> MDP Driver -> DRM
[1]https://patchwork.kernel.org/patch/9305329/
Tiffany Lin (4):
v4l: add Mediatek compressed video block format
docs-rst: Add compressed video formats used on MT8173 codec driver
vcodec: mediatek: Add V4L2_PIX_FMT_MT21C support for v4l2 decoder
arm64: dts: mediatek: Add Video Decoder for MT8173
Documentation/media/uapi/v4l/pixfmt-reserved.rst | 6 +++
arch/arm64/boot/dts/mediatek/mt8173.dtsi | 44 ++++++++++++++++++++
drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c | 7 +++-
drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
include/uapi/linux/videodev2.h | 1 +
5 files changed, 58 insertions(+), 1 deletion(-)
So basically the video decoder is useless without support for this format and
without the MDP driver, right?
Yes. It also require new vpu firmware.
Andrew will help release new vpu firmware include encode/decode/mdp
capability.
OK, then I'll park this until:
- the MT21C patch series is OK
- the MDP patch series is OK
- the new firmware is released
For the record: the decoder patch series is OK as far as I am concerned.
It's in my mtkdec branch.
Regards,
Hans
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