linux-kernel - Re: [PATCH v3 0/9] Add MT8173 Video Decoder Driver

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Date:	Mon, 4 Jul 2016 19:09:15 +0800
From:	andrew-ct chen <andrew-ct.chen@...iatek.com>
To:	Hans Verkuil <hverkuil@...all.nl>
CC:	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	tiffany lin <tiffany.lin@...iatek.com>,
	<devicetree@...r.kernel.org>, <daniel.thompson@...aro.org>,
	<linux-mediatek@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Hans Verkuil <hansverk@...co.com>,
	<PoChun.Lin@...iatek.com>, Rob Herring <robh+dt@...nel.org>,
	Hans Verkuil <hans.verkuil@...co.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	"Matthias Brugger" <matthias.bgg@...il.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Eddie Huang <eddie.huang@...iatek.com>,
	Pawel Osciak <posciak@...omium.org>,
	<linux-media@...r.kernel.org>
Subject: Re: [PATCH v3 0/9] Add MT8173 Video Decoder Driver

On Fri, 2016-07-01 at 14:00 +0200, Hans Verkuil wrote:
> On 07/01/2016 01:53 PM, andrew-ct chen wrote:
> > On Fri, 2016-07-01 at 12:11 +0200, Hans Verkuil wrote:
> >> On 06/16/2016 12:54 PM, Mauro Carvalho Chehab wrote:
> >>> Em Tue, 14 Jun 2016 19:08:08 +0800
> >>> tiffany lin <tiffany.lin@...iatek.com> escreveu:
> >>>
> >>>> Hi Mauro,
> >>>>
> >>>>
> >>>> On Wed, 2016-06-08 at 07:13 +0900, Hans Verkuil wrote:
> >>>>>
> >>>>> On 06/07/2016 11:22 PM, Mauro Carvalho Chehab wrote:  
> >>>>>> Em Mon, 30 May 2016 20:29:14 +0800
> >>>>>> Tiffany Lin <tiffany.lin@...iatek.com> escreveu:
> >>>>>>  
> >>>>>>> ==============
> >>>>>>>   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 decoding of in a range of formats.
> >>>>>>>
> >>>>>>> This patch series add Mediatek block format V4L2_PIX_FMT_MT21, the decoder driver will decoded bitstream to
> >>>>>>> V4L2_PIX_FMT_MT21 format.
> >>>>>>>
> >>>>>>> This patch series rely on MTK VPU driver in patch series "Add MT8173 Video Encoder Driver and VPU Driver"[1]
> >>>>>>> and patch "CHROMIUM: v4l: Add V4L2_PIX_FMT_VP9 definition"[2] for VP9 support.
> >>>>>>> Mediatek Video Decoder driver rely on VPU driver to load, communicate with VPU.
> >>>>>>>
> >>>>>>> Internally the driver uses videobuf2 framework and MTK IOMMU and MTK SMI both have been merged in v4.6-rc1.
> >>>>>>>
> >>>>>>> [1]https://patchwork.linuxtv.org/patch/33734/
> >>>>>>> [2]https://chromium-review.googlesource.com/#/c/245241/  
> >>>>>>
> >>>>>> Hmm... I'm not seeing the firmware for this driver at the
> >>>>>> linux-firmware tree:
> >>>>>> 	https://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/log/
> >>>>>>
> >>>>>> Nor I'm seeing any pull request for them. Did you send it?
> >>>>>> I'll only merge the driver upstream after seeing such pull request.  
> >>>>>   
> >>>> Sorry, I am not familiar with how to upstream firmware.
> >>>> Do you mean we need to upstream vpu firmware first before merge encoder
> >>>> driver upstream?
> >>>
> >>> Please look at this page:
> >>> 	https://linuxtv.org/wiki/index.php/Development:_How_to_submit_patches#Firmware_submission
> >>>
> >>> The information here can also be useful:
> >>> 	https://www.kernel.org/doc/readme/firmware-README.AddingFirmware
> >>>
> >>> In summary, you need to provide redistribution rights for the
> >>> firmware blob. You can either submit it to me or directly to
> >>> linux-firmware. In the latter, please c/c me on such patch.
> >>
> >> Tiffany, what is the status of the firmware submission?
> >>
> >> Regards,


> >>
> >> 	Hans
> > 
> > Hi Hans,
> > We are working on firmware test to make sure that both decoder and
> > encoder work well. Hopes it can be ready (firmware submission) on July 4
> > or July 5.
> 
> OK, great! Just wanted to make sure that this work was progressing and not stalled.
> 
> Thanks!
> 
> 	Hans

Hi Hans,

We have submitted VPU firmware for encoder as the following link.
http://lists.infradead.org/pipermail/linux-mediatek/2016-July/006082.html
If the series of decoder patches apply, we will update the VPU firmware
for decoder support.

Thanks!.
	
	Andrew