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Message-ID: <1455605198.19396.74.camel@mtksdaap41> Date: Tue, 16 Feb 2016 14:46:38 +0800 From: tiffany lin <tiffany.lin@...iatek.com> To: Hans Verkuil <hverkuil@...all.nl> CC: Hans Verkuil <hans.verkuil@...co.com>, <daniel.thompson@...aro.org>, "Rob Herring" <robh+dt@...nel.org>, Mauro Carvalho Chehab <mchehab@....samsung.com>, Matthias Brugger <matthias.bgg@...il.com>, Daniel Kurtz <djkurtz@...omium.org>, Pawel Osciak <posciak@...omium.org>, Eddie Huang <eddie.huang@...iatek.com>, Yingjoe Chen <yingjoe.chen@...iatek.com>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-media@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>, <PoChun.Lin@...iatek.com> Subject: Re: [PATCH v4 0/8] Add MT8173 Video Encoder Driver and VPU Driver Hi Hans, On Mon, 2016-02-15 at 13:04 +0100, Hans Verkuil wrote: > Hi Tiffany, > > Once again, thanks for your patch series! > > I have some more comments below. > > On 02/04/2016 12:34 PM, Tiffany Lin wrote: > > > > ============== > > Introduction > > ============== > > > > The purpose of this series is to add the driver for video codec hw embedded in the Mediatek's MT8173 SoCs. > > Mediatek Video Codec is able to handle video encoding of in a range of formats. > > > > This patch series also include VPU driver. Mediatek Video Codec driver rely on VPU driver to load, communicate with VPU. > > > > Internally the driver uses videobuf2 framework and MTK IOMMU and MTK SMI. > > MTK IOMMU[1] and MTK SMI[2] have not yet been merged, but we wanted to start discussion about the driver earlier so it could be merged sooner. > > > > [1]https://patchwork.kernel.org/patch/8120921/ > > [2]https://patchwork.kernel.org/patch/8120941/ > > > > > > ================== > > Device interface > > ================== > > > > In principle the driver bases on v4l2 memory-to-memory framework: > > it provides a single video node and each opened file handle gets its own private context with separate buffer queues. Each context consist of 2 buffer queues: OUTPUT (for source buffers, i.e. raw video frames) and CAPTURE (for destination buffers, i.e. encoded video frames). > > > > ============================== > > VPU (Video Processor Unit) > > ============================== > > The VPU driver for hw video codec embedded in Mediatek's MT8173 SOCs. > > It is able to handle video decoding/encoding in a range of formats. > > The driver provides with VPU firmware download, memory management and the communication interface between CPU and VPU. > > For VPU initialization, it will create virtual memory for CPU access and physical address for VPU hw device access. When a decode/encode instance opens a device node, vpu driver will download vpu firmware to the device. > > A decode/encode instant will decode/encode a frame using VPU interface to interrupt vpu to handle decoding/encoding jobs. > > > > Please have a look at the code and comments will be very much appreciated. > > > > > > Change in v4: > > Vcodec Part > > 1. Remove MTK_ENCODE_PARAM_SKIP_FRAME support > > 2. Remove MTK_ENCODE_PARAM_FRAME_TYPE and change to use V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME[3] > > 3. Refine Encoder HW clock source > > 4. Refine debug log > > 5. Add watchdog support > > 6. With patch "media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32"[4], v4l2-compliance test passed[5] in v4.4-rc5 > > > > VPU Part > > 1. These two patches were Acked-by: Rob Herring <robh@...nel.org> in v3 > > [PATCH v3 1/8] dt-bindings: Add a binding for Mediatek Video Processor > > [PATCH v3 3/8] arm64: dts: mediatek: Add node for Mediatek Video Processor Unit > > Because we were wrong about how the hardware works, there is no connection between VPU and IOMMU HW > > We remove VPU attaching to IOMMU > > 2. Support VPU running on 4GB DRAM system > > 3. Support VPU watchdog reset > > 4. Refine for coding style > > > > [3]https://patchwork.linuxtv.org/patch/32670/ > > [4] https://patchwork.linuxtv.org/patch/32631/ > > [5]localhost ~ # /usr/bin/v4l2-compliance -d /dev/video1 > > Driver Info: > > Driver name : mtk-vcodec-en > > Card type : platform:mt817 > > Bus info : platform:mt817 > > Perhaps this should be mt817x? > > > Driver version: 4.4.0 > > Capabilities : 0x84204000 > > Video Memory-to-Memory Multiplanar > > Streaming > > Extended Pix Format > > Device Capabilities > > Device Caps : 0x04204000 > > Video Memory-to-Memory Multiplanar > > Streaming > > Extended Pix Format > > > > Compliance test for device /dev/video1 (not using libv4l2): > > > > Required ioctls: > > test VIDIOC_QUERYCAP: OK > > > > Allow for multiple opens: > > test second video open: OK > > test VIDIOC_QUERYCAP: OK > > test VIDIOC_G/S_PRIORITY: OK > > > > Debug ioctls: > > test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported) > > test VIDIOC_LOG_STATUS: OK (Not Supported) > > > > Input ioctls: > > test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported) > > test VIDIOC_G/S_FREQUENCY: OK (Not Supported) > > test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported) > > test VIDIOC_ENUMAUDIO: OK (Not Supported) > > test VIDIOC_G/S/ENUMINPUT: OK (Not Supported) > > test VIDIOC_G/S_AUDIO: OK (Not Supported) > > Inputs: 0 Audio Inputs: 0 Tuners: 0 > > > > Output ioctls: > > test VIDIOC_G/S_MODULATOR: OK (Not Supported) > > test VIDIOC_G/S_FREQUENCY: OK (Not Supported) > > test VIDIOC_ENUMAUDOUT: OK (Not Supported) > > test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported) > > test VIDIOC_G/S_AUDOUT: OK (Not Supported) > > Outputs: 0 Audio Outputs: 0 Modulators: 0 > > > > Input/Output configuration ioctls: > > test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported) > > test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported) > > test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported) > > test VIDIOC_G/S_EDID: OK (Not Supported) > > > > Control ioctls: > > test VIDIOC_QUERYCTRL/MENU: OK > > test VIDIOC_G/S_CTRL: OK > > test VIDIOC_G/S/TRY_EXT_CTRLS: OK > > test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK > > test VIDIOC_G/S_JPEGCOMP: OK (Not Supported) > > Standard Controls: 12 Private Controls: 0 > > > > Format ioctls: > > test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK > > test VIDIOC_G/S_PARM: OK (Not Supported) > > test VIDIOC_G_FBUF: OK (Not Supported) > > test VIDIOC_G_FMT: OK > > test VIDIOC_TRY_FMT: OK > > test VIDIOC_S_FMT: OK > > test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported) > > > > Codec ioctls: > > test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported) > > test VIDIOC_G_ENC_INDEX: OK (Not Supported) > > test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported) > > > > Buffer ioctls: > > warn: ../../../v4l-utils-1.6.0/utils/v4l2-compliance/v4l2-test-buffers.cpp(475): VIDIOC_CREATE_BUFS not supported > > warn: ../../../v4l-utils-1.6.0/utils/v4l2-compliance/v4l2-test-buffers.cpp(475): VIDIOC_CREATE_BUFS not supported > > test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK > > test VIDIOC_EXPBUF: OK > > > > Total: 38, Succeeded: 38, Failed: 0, Warnings: 2 > > Looks great! > > Having reviewed the v4 patch series I'd say it is close to being ready (at least > w.r.t. the V4L2 parts). Most of my comments are minor, but fixing the open() > limitation is probably a bigger change on your side. > > It should be well worth the effort, though. In my experience limiting the number > of time you can call open() is always a sign of a design flaw and the code improves > if this is handled in the right place (usually start_streaming, which is when you > actually start to use the hardware). > > And besides, limiting the number of open()s is out-of-spec. > You are right. We did not think about this before. We will remove open() limitation and put limitation control in right place. Appreciated your time and suggestions. > Regards, > > Hans > > > > > > > Change in v3: > > 1.Refine code to pass v4l2-compliance test, now it still has 2 issues 2.Refine code according to latest MTK IOMMU patches[1] 3.Remove MFC51 specific CIDs and add MTK specific CIDs for for keyframe and > > skip I-frame > > 4.Refine code according to review comments > > > > Below is the v1.6 version v4l2-compliance report for the mt8173 encoder driver. > > Now there are still 2 test fail in v1.6. > > For VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF, we directly use v4l2_m2m_ioctl_* functions, but it still fail. It pass in kernel 3.18 but fail in kernel 4.4. > > We will try v1.8 in next version. > > VIDIOC_EXPBUF is becuase we support all three memory types VB2_DMABUF, VB2_MMAP and VB2_USERPTR. VIDIOC_EXPBUF only allowed when only VB2_MMAP supported. > > localhost ~ # /usr/bin/v4l2-compliance -d /dev/video1 Driver Info: > > Driver name : mtk-vcodec-en > > Card type : platform:mt817 > > Bus info : platform:mt817 > > Driver version: 4.4.0 > > Capabilities : 0x84204000 > > Video Memory-to-Memory Multiplanar > > Streaming > > Extended Pix Format > > Device Capabilities > > Device Caps : 0x04204000 > > Video Memory-to-Memory Multiplanar > > Streaming > > Extended Pix Format > > > > Compliance test for device /dev/video1 (not using libv4l2): > > > > Required ioctls: > > test VIDIOC_QUERYCAP: OK > > > > Allow for multiple opens: > > test second video open: OK > > test VIDIOC_QUERYCAP: OK > > test VIDIOC_G/S_PRIORITY: OK > > > > Debug ioctls: > > test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported) > > test VIDIOC_LOG_STATUS: OK (Not Supported) > > > > Input ioctls: > > test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported) > > test VIDIOC_G/S_FREQUENCY: OK (Not Supported) > > test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported) > > test VIDIOC_ENUMAUDIO: OK (Not Supported) > > test VIDIOC_G/S/ENUMINPUT: OK (Not Supported) > > test VIDIOC_G/S_AUDIO: OK (Not Supported) > > Inputs: 0 Audio Inputs: 0 Tuners: 0 > > > > Output ioctls: > > test VIDIOC_G/S_MODULATOR: OK (Not Supported) > > test VIDIOC_G/S_FREQUENCY: OK (Not Supported) > > test VIDIOC_ENUMAUDOUT: OK (Not Supported) > > test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported) > > test VIDIOC_G/S_AUDOUT: OK (Not Supported) > > Outputs: 0 Audio Outputs: 0 Modulators: 0 > > > > Input/Output configuration ioctls: > > test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported) > > test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported) > > test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported) > > test VIDIOC_G/S_EDID: OK (Not Supported) > > > > Control ioctls: > > test VIDIOC_QUERYCTRL/MENU: OK > > test VIDIOC_G/S_CTRL: OK > > test VIDIOC_G/S/TRY_EXT_CTRLS: OK > > test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK > > test VIDIOC_G/S_JPEGCOMP: OK (Not Supported) > > Standard Controls: 11 Private Controls: 2 > > > > Format ioctls: > > test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK > > test VIDIOC_G/S_PARM: OK (Not Supported) > > test VIDIOC_G_FBUF: OK (Not Supported) > > test VIDIOC_G_FMT: OK > > test VIDIOC_TRY_FMT: OK > > test VIDIOC_S_FMT: OK > > test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported) > > > > Codec ioctls: > > test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported) > > test VIDIOC_G_ENC_INDEX: OK (Not Supported) > > test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported) > > > > Buffer ioctls: > > fail: ../../../v4l-utils-1.6.0/utils/v4l2-compliance/v4l2-test-buffers.cpp(266): vp->length == 0 > > fail: ../../../v4l-utils-1.6.0/utils/v4l2-compliance/v4l2-test-buffers.cpp(335): buf.check(Unqueued, i) > > fail: ../../../v4l-utils-1.6.0/utils/v4l2-compliance/v4l2-test-buffers.cpp(420): testQueryBuf(node, i, q.g_buffers()) > > test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL > > fail: ../../../v4l-utils-1.6.0/utils/v4l2-compliance/v4l2-test-buffers.cpp(500): q.has_expbuf(node) > > test VIDIOC_EXPBUF: FAIL > > Total: 38, Succeeded: 36, Failed: 2, Warnings: 0 > > > > > > Change in v2: > > Vcodec Part > > 1.Remove common and include directory in mtk-vcodec 2.Refine vb2ops_venc_start_streaming and vb2ops_venc_stop_streaming and state machine 3.Remove venc_if_init and venc_if_deinit 4.Refine debug message 5.Refine lab and vpu decription in mediatek-vcodec.txt > > > > VPU Part > > 1. Modify VPU Kconfig > > 2. Move encoder header files to other patch sets 3. Remove marcos for extended virtual/iova address 4. Change register and variable names 5. Add a reference counter for VPU watchdog 6. Remove one busy waiting in function vpu_ipi_send 7. Operate VPU clock in VPU driver (not called by encoder drivers) 8. Refine memory mapping, firmware download and extended memory allocation/free functions 9. Release more allocated resources in driver remove function > > > > > > > > Andrew-CT Chen (2): > > dt-bindings: Add a binding for Mediatek Video Processor > > [Media] vcodec: mediatek: Add Mediatek V4L2 Video Encoder Driver > > > > Tiffany Lin (6): > > [media] VPU: mediatek: support Mediatek VPU > > arm64: dts: mediatek: Add node for Mediatek Video Processor Unit > > dt-bindings: Add a binding for Mediatek Video Encoder > > [media] vcodec: mediatek: Add Mediatek VP8 Video Encoder Driver > > [media] vcodec: mediatek: Add Mediatek H264 Video Encoder Driver > > arm64: dts: mediatek: Add Video Encoder for MT8173 > > > > .../devicetree/bindings/media/mediatek-vcodec.txt | 59 + > > .../devicetree/bindings/media/mediatek-vpu.txt | 31 + > > arch/arm64/boot/dts/mediatek/mt8173.dtsi | 62 + > > drivers/media/platform/Kconfig | 20 + > > drivers/media/platform/Makefile | 4 + > > drivers/media/platform/mtk-vcodec/Makefile | 11 + > > .../media/platform/mtk-vcodec/h264_enc/Makefile | 6 + > > .../platform/mtk-vcodec/h264_enc/venc_h264_if.c | 540 ++++++++ > > .../platform/mtk-vcodec/h264_enc/venc_h264_if.h | 165 +++ > > .../platform/mtk-vcodec/h264_enc/venc_h264_vpu.c | 309 +++++ > > .../platform/mtk-vcodec/h264_enc/venc_h264_vpu.h | 30 + > > drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h | 388 ++++++ > > drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c | 1380 ++++++++++++++++++++ > > drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.h | 46 + > > .../media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c | 476 +++++++ > > .../media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c | 132 ++ > > .../media/platform/mtk-vcodec/mtk_vcodec_intr.c | 102 ++ > > .../media/platform/mtk-vcodec/mtk_vcodec_intr.h | 29 + > > drivers/media/platform/mtk-vcodec/mtk_vcodec_pm.h | 26 + > > .../media/platform/mtk-vcodec/mtk_vcodec_util.c | 106 ++ > > .../media/platform/mtk-vcodec/mtk_vcodec_util.h | 85 ++ > > drivers/media/platform/mtk-vcodec/venc_drv_base.h | 62 + > > drivers/media/platform/mtk-vcodec/venc_drv_if.c | 106 ++ > > drivers/media/platform/mtk-vcodec/venc_drv_if.h | 175 +++ > > drivers/media/platform/mtk-vcodec/venc_ipi_msg.h | 212 +++ > > drivers/media/platform/mtk-vcodec/vp8_enc/Makefile | 6 + > > .../platform/mtk-vcodec/vp8_enc/venc_vp8_if.c | 422 ++++++ > > .../platform/mtk-vcodec/vp8_enc/venc_vp8_if.h | 149 +++ > > .../platform/mtk-vcodec/vp8_enc/venc_vp8_vpu.c | 240 ++++ > > .../platform/mtk-vcodec/vp8_enc/venc_vp8_vpu.h | 28 + > > drivers/media/platform/mtk-vpu/Makefile | 1 + > > drivers/media/platform/mtk-vpu/mtk_vpu.c | 994 ++++++++++++++ > > drivers/media/platform/mtk-vpu/mtk_vpu.h | 167 +++ > > include/uapi/linux/v4l2-controls.h | 4 + > > 34 files changed, 6573 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/media/mediatek-vcodec.txt > > create mode 100644 Documentation/devicetree/bindings/media/mediatek-vpu.txt > > create mode 100644 drivers/media/platform/mtk-vcodec/Makefile > > create mode 100644 drivers/media/platform/mtk-vcodec/h264_enc/Makefile > > create mode 100644 drivers/media/platform/mtk-vcodec/h264_enc/venc_h264_if.c > > create mode 100644 drivers/media/platform/mtk-vcodec/h264_enc/venc_h264_if.h > > create mode 100644 drivers/media/platform/mtk-vcodec/h264_enc/venc_h264_vpu.c > > create mode 100644 drivers/media/platform/mtk-vcodec/h264_enc/venc_h264_vpu.h > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.h > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_intr.c > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_intr.h > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_pm.h > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_util.c > > create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_util.h > > create mode 100644 drivers/media/platform/mtk-vcodec/venc_drv_base.h > > create mode 100644 drivers/media/platform/mtk-vcodec/venc_drv_if.c > > create mode 100644 drivers/media/platform/mtk-vcodec/venc_drv_if.h > > create mode 100644 drivers/media/platform/mtk-vcodec/venc_ipi_msg.h > > create mode 100644 drivers/media/platform/mtk-vcodec/vp8_enc/Makefile > > create mode 100644 drivers/media/platform/mtk-vcodec/vp8_enc/venc_vp8_if.c > > create mode 100644 drivers/media/platform/mtk-vcodec/vp8_enc/venc_vp8_if.h > > create mode 100644 drivers/media/platform/mtk-vcodec/vp8_enc/venc_vp8_vpu.c > > create mode 100644 drivers/media/platform/mtk-vcodec/vp8_enc/venc_vp8_vpu.h > > create mode 100644 drivers/media/platform/mtk-vpu/Makefile > > create mode 100644 drivers/media/platform/mtk-vpu/mtk_vpu.c > > create mode 100644 drivers/media/platform/mtk-vpu/mtk_vpu.h > > mode change 100644 => 100755 include/uapi/linux/v4l2-controls.h > > >
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