linux-kernel - Re: [PATCH v5 0/8] Add MT8173 Video Encoder Driver and VPU Driver

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Date:	Tue, 23 Feb 2016 09:47:39 +0100
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Tiffany Lin <tiffany.lin@...iatek.com>,
	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>
Cc:	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 v5 0/8] Add MT8173 Video Encoder Driver and VPU Driver

On 02/23/16 09:11, 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/8335461/
> [2]https://patchwork.kernel.org/patch/7596181/

<snip>

> v4l2-compliance test output:
> localhost ~ # /usr/bin/v4l2-compliance -d /dev/video1
> Driver Info:
>         Driver name   : mtk-vcodec-enc
>         Card type     : platform:mt8173
>         Bus info      : platform:mt8173
>         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
>                 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:
>                 test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
>                 test VIDIOC_EXPBUF: OK
> 
> Total: 38, Succeeded: 38, Failed: 0, Warnings: 0

Nice!

Can you try 'v4l2-compliance -s'? Note that this may not work since I know
that v4l2-compliance doesn't work all that well with codecs, but I am
curious what the output is when you try streaming.

Don't bother trying to chase down reported failures, those are likely from
v4l2-compliance itself. It is something I would like to improve, but -ENOTIME.

Regards,

	Hans