[PATCH 0/9] Enable two H264 encoder cores on MT8195

Irui Wang
2021-08-16T11:00:22Z

MT8195 has two H264 encoder cores, they have their own power-domains,
clocks, interrupts, register base. The two H264 encoder cores can work
together to achieve higher performance.

This series of patches is to use enable two h264 encoder cores.
path[1..2]: use linux component framework to manage encoder hardware,
user call "mt8195-vcodec-enc" driver can get the encoder master device,
the encoding work is done by the two encoder core device. The hw_mode
variable is added to distinguish from old platform, two encoder cores
called "FRAME_RACING_MODE".

The hardware mode of two encoder cores work together(overlap, another
word called) on MT8195 called "frame_racing_mode", the two encoder
power-domains should be power on together while encoding, the encoding
process look like this:

VENC Core0 frm#0....frm#2....frm#4
VENC Core1 .frm#1....frm#3....frm#5

patch[3..5]: due to the component device, the master device has no
power-domains/clocks properties in dtsi, so the power/clock init function
can't use for "frame_racing_mode" device in master device probe process,
it should be called in component device probe process. Power on the
hardware power and clock on demand.

patch[6]: "frame_racing_mode" encoding need a new set of memory buffer
for two encoder cores. For compatibility, we should new a encoder driver
interface.

patch[7..9]: add "frame_racing_mode" encoding process:
As-Is: Synchronous
VIDIOC_QBUF#0 --> device_run(triger encoder) --> wait encoder IRQ -->
encode done with result --> job_finish

VIDIOC_QBUF#1 --> device_run(triger encoder) --> wait encoder IRQ -->
encode done with result --> job_finish
...

To-Be: Asynchronous
VIDIOC_QBUF#0 --> device_run(triger encoder core0) --> job_finish
..VIDIOC_QBUF#1 --> device_run(triger encoder core1) --> job_finish
(core0 may encode done here, return encode result to client)
VIDIOC_QBUF#2 --> device_run(triger encoder core0) --> job_finish

Thers is no "wait encoder IRQ" synchronous call during "frame_racing_mode"
encoding process, which can full use the two encoder cores to achieve
higher performance.

Irui Wang (9):
dt-bindings: media: mtk-vcodec: Add binding for MT8195 two venc cores
media: mtk-vcodec: Use component framework to manage encoder hardware
media: mtk-vcodec: Rewrite venc power manage interface
media: mtk-vcodec: Add venc power on/off interface
media: mtk-vcodec: Rewrite venc clock interface
media: mtk-vcodec: Add new venc drv interface for frame_racing mode
media: mtk-vcodec: Add frame racing mode encode process
media: mtk-vcodec: Return encode result to client
media: mtk-vcodec: Add delayed worker for encode timeout

.../bindings/media/mediatek-vcodec.txt | 2 +
drivers/media/platform/mtk-vcodec/Makefile | 2 +
.../platform/mtk-vcodec/mtk_vcodec_drv.h | 34 +-
.../platform/mtk-vcodec/mtk_vcodec_enc.c | 120 +++-
.../platform/mtk-vcodec/mtk_vcodec_enc.h | 10 +-
.../platform/mtk-vcodec/mtk_vcodec_enc_drv.c | 204 +++++-
.../platform/mtk-vcodec/mtk_vcodec_enc_hw.c | 253 +++++++
.../platform/mtk-vcodec/mtk_vcodec_enc_hw.h | 38 +
.../platform/mtk-vcodec/mtk_vcodec_enc_pm.c | 213 ++++--
.../platform/mtk-vcodec/mtk_vcodec_enc_pm.h | 13 +-
.../platform/mtk-vcodec/mtk_vcodec_util.c | 19 +
.../platform/mtk-vcodec/mtk_vcodec_util.h | 5 +
.../platform/mtk-vcodec/venc/venc_common_if.c | 675 ++++++++++++++++++
.../platform/mtk-vcodec/venc/venc_h264_if.c | 6 +-
.../platform/mtk-vcodec/venc/venc_vp8_if.c | 2 +-
.../media/platform/mtk-vcodec/venc_drv_if.c | 96 ++-
.../media/platform/mtk-vcodec/venc_drv_if.h | 7 +
.../media/platform/mtk-vcodec/venc_vpu_if.c | 11 +-
.../media/platform/mtk-vcodec/venc_vpu_if.h | 3 +-
19 files changed, 1564 insertions(+), 149 deletions(-)
create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_hw.c
create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_hw.h
create mode 100644 drivers/media/platform/mtk-vcodec/venc/venc_common_if.c

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2.25.1