linux-kernel - Re: [PATCH v5 0/9] Add MT8173 Video Decoder Driver

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Message-ID: <1473075036.23162.14.camel@mtksdaap41>
Date:   Mon, 5 Sep 2016 19:30:36 +0800
From:   Tiffany Lin <tiffany.lin@...iatek.com>
To:     Hans Verkuil <hverkuil@...all.nl>
CC:     <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 v5 0/9] Add MT8173 Video Decoder Driver

Hi Hans,

On Mon, 2016-09-05 at 13:26 +0200, Hans Verkuil wrote:
> On 09/05/2016 12:52 PM, Tiffany Lin wrote:
> > Hi Hans,
> > 
> > On Mon, 2016-09-05 at 12:09 +0200, Hans Verkuil wrote:
> >> On 09/05/2016 11:53 AM, Hans Verkuil wrote:
> >>> On 09/05/2016 11:50 AM, Tiffany Lin wrote:
> >>>> Hi Hans,
> >>>>
> >>>> On Mon, 2016-09-05 at 11:33 +0200, Hans Verkuil wrote:
> >>>>> On 09/02/2016 02:19 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 decoding and encoding of in a range of formats.
> >>>>>>
> >>>>>> This patch series rely on MTK VPU driver that have been merged in v4.8-rc1.
> >>>>>> 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://chromium-review.googlesource.com/#/c/245241/
> >>>>>
> >>>>> This patch series fails to apply to the media_tree master (patch 3/9). Can you rebase and repost?
> >>>>>
> >>>>> I'm ready to make a pull request for this, so I hope you can fix this soon.
> >>>>>
> >>>> I saw Encoder fix patches in fixes branch.
> >>>> This patch series is base on Encoder fix patches. 
> >>>>
> >>>> [media] vcodec:mediatek: Refine VP8 encoder driver
> >>>> [media] vcodec:mediatek: Refine H264 encoder driver
> >>>> [media] vcodec:mediatek: change H264 profile default to profile high
> >>>> [media] vcodec:mediatek: Add timestamp and timecode copy for V4L2
> >>>> Encoder
> >>>> [media] vcodec:mediatek: Fix visible_height larger than coded_height
> >>>> issue in s_fmt_out
> >>>> [media] vcodec:mediatek: Fix fops_vcodec_release flow for V4L2 Encoder
> >>>> [media] vcodec:mediatek:code refine for v4l2 Encoder driver
> >>>> [media] dvb_frontend: Use memdup_user() rather than duplicating its
> >>>> implementation
> >>>>
> >>>>
> >>>> If I do not rebase decoder patch series base on Encoder fix pathces.
> >>>> Then it will fail after Encoder fix patches merged.
> >>>>
> >>>> May I know what parent patch I need to rebase to to fix this issue?
> >>>
> >>> Ah, OK. I will retest placing this on top of those fixes. I forgot about the
> >>> pending fixes. I'll handle this.
> >>
> >> OK, that works much better when it is on top of the fixes.
> >>
> >> Only one thing is missing: an entry in the MAINTAINERS file. Strange that that
> >> wasn't done for the encoder driver, we must have missed that. So can you make a
> >> patch adding the en/decoder driver to this file? I'm ready to make the pull
> >> request once I have that.
> >>
> > Got it. I will check and update it.
> > 
> > I have a question about decoder device node.
> > In v5 decoder patch series, I do not add device node patch at end of
> > patch series.
> > I plain to put it in MT21C format patch series, is it ok?
> 
> What is the reason for not adding it in the decoder patch series?
> 

It is because our decoder HW only support MT21C format.


best regards,
Tiffany

> Regards,
> 
> 	Hans