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, it's a core mode called
frame-racing, one core has 4K@30fps performance, two cores can achieve
4K@60fps.
The two encoder core encoding process looks like this:
VENC Core0: frm#0....frm#2....frm#4....
VENC Core1: ..frm#1....frm#3....frm#5....
This series of patches are used to enable the two H264 encoder cores,
encoding process will be changed:
As-Is: Synchronous
V4L2_VIDIOC_QBUF#0 --> device_run(triger encoder) --> wait encoder IRQ -->
encoding done with result --> job_finish
V4l2_VIDIOC_QBUF#1 --> device_run(triger encoder) --> wait encoder IRQ -->
encoding done with result --> job_finish
...
To-Be: Asynchronous
V4L2_VIDIOC_QBUF#0 --> device_run(triger encoder) --> job_finish
..V4l2_VIDIOC_QBUF#1 --> device_run(triger encoder) --> job_finish
(venc core0 may encode done here, done the encoding result to client)
V4L2_VIDIOC_QBUF#2 --> device_run(triger encoder) --> job_finish.
There is no "wait encoder IRQ" synchronous call during frame-racing mode
encoding process, it can full use the two encoder cores to achieve higher
performance.
---
This series patches dependent on:
media_stage tree:
[1]
https://git.linuxtv.org/media_stage.git/commit/?id=b3627647f9ea7473d10fb08a95fd7c4133a17ca4
mt8192 decoder:
[2] https://patchwork.kernel.org/project/linux-mediatek/list/?series=616991
patch3 new venc dt-bindings included files
[3] MM IOMMU binding:
https://patchwork.kernel.org/project/linux-mediatek/patch/20220217113453.13658-2-yong.wu@xxxxxxxxxxxx/
[4] MT8195 power domain:
https://patchwork.kernel.org/project/linux-mediatek/list/?series=580579
changes compared with v2:
- update venc core dt-bindings, add two new properties for current usage.
- parse venc multi_core mode from device tree.
- rebase to the newer linux media stage.
changes compared with v1:
- of_platform_populate was used in place of the component framework.
- new yaml file for venc cores.
- some modifications for patch v1's review comments.
---
Irui Wang (10):
media: mtk-vcodec: Use core type to indicate h264 and vp8 enc
media: mtk-vcodec: export encoder functions
dt-bindings: media: mtk-vcodec: Adds encoder cores dt-bindings for
mt8195
media: mtk-vcodec: Enable venc dual core usage
media: mtk-vcodec: 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 more extra processing for venc_multi_core mode
media: mtk-vcodec: Add venc_multi_core mode encode process
media: mtk-vcodec: Done encode result to client
.../media/mediatek,vcodec-encoder-core.yaml | 181 +++++++++++++++
.../media/mediatek,vcodec-encoder.yaml | 1 -
drivers/media/platform/mtk-vcodec/Makefile | 4 +-
.../platform/mtk-vcodec/mtk_vcodec_drv.h | 36 ++-
.../platform/mtk-vcodec/mtk_vcodec_enc.c | 113 +++++++---
.../platform/mtk-vcodec/mtk_vcodec_enc.h | 7 +-
.../platform/mtk-vcodec/mtk_vcodec_enc_core.c | 169 ++++++++++++++
.../platform/mtk-vcodec/mtk_vcodec_enc_core.h | 36 +++
.../platform/mtk-vcodec/mtk_vcodec_enc_drv.c | 107 +++++----
.../platform/mtk-vcodec/mtk_vcodec_enc_pm.c | 183 +++++++++++++--
.../platform/mtk-vcodec/mtk_vcodec_enc_pm.h | 11 +-
.../platform/mtk-vcodec/mtk_vcodec_util.c | 19 ++
.../platform/mtk-vcodec/mtk_vcodec_util.h | 5 +
.../platform/mtk-vcodec/venc/venc_h264_if.c | 212 +++++++++++++++---
.../platform/mtk-vcodec/venc/venc_vp8_if.c | 3 +-
.../media/platform/mtk-vcodec/venc_drv_if.c | 79 +++++--
.../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, 1026 insertions(+), 161 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/mediatek,vcodec-encoder-core.yaml
create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_core.c
create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_core.h
--
2.18.0
