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

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Date:   Mon, 5 Sep 2016 13:26:06 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Tiffany Lin <tiffany.lin@...iatek.com>
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

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?

Regards,

	Hans