linux-kernel - Re: [PATCH RFC 6/8] drm: hisilicon: Add support for fbdev

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Message-ID: <55F8E2C1.5030207@hisilicon.com>
Date:	Wed, 16 Sep 2015 11:32:17 +0800
From:	Xinwei Kong <kong.kongxinwei@...ilicon.com>
To:	Rob Herring <robh@...nel.org>, <airlied@...ux.ie>,
	<corbet@....net>, <catalin.marinas@....com>, <will.deacon@....com>
CC:	<dri-devel@...ts.freedesktop.org>, <linux-doc@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linuxarm@...wei.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<xinliang.liu@...aro.org>, <andy.green@...aro.org>,
	<qijiwen@...ilicon.com>, <gongyu@...ilicon.com>,
	<haojian.zhuang@...aro.org>, <liguozhu@...ilicon.com>,
	<xuwei5@...ilicon.com>, <yinshengbao@...ilicon.com>,
	<yanhaifeng@...ilicon.com>, <ml.yang@...ilicon.com>,
	<yimin@...wei.com>, <w.f@...wei.com>, <puck.chen@...ilicon.com>,
	<bintian.wang@...wei.com>, <benjamin.gaignard@...aro.org>,
	<xuyiping@...ilicon.com>, <james.yanglong@...ilicon.com>,
	<fangdechun@...ilicon.com>
Subject: Re: [PATCH RFC 6/8] drm: hisilicon: Add support for fbdev

hi rob

On 2015/9/16 2:25, Rob Herring wrote:
> On 09/15/2015 04:37 AM, Xinwei Kong wrote:
>> If you config DRM_HISI_FBDEV optional, this patch will only support fbdev
>> mode while also supporting double buffer.
> 
> This is a lot of duplicated code from CMA fbdev. Is double buffering the
> only reason why CMA fbdev can't be used or are there some other
> constraints? Double buffering in fbdev has always been a hack, so I'm
> guessing that is not a feature that should be added here.
> 
I will drop it.

xinwei
> Rob
> 
>> Signed-off-by: Xinliang Liu <xinliang.liu@...aro.org>
>> Signed-off-by: Xinwei Kong <kong.kongxinwei@...ilicon.com>
>> Signed-off-by: Andy Green <andy.green@...aro.org>
>> Signed-off-by: Jiwen Qi <qijiwen@...ilicon.com>
>> Signed-off-by: Yu Gong <gongyu@...ilicon.com>
>> ---
>>  drivers/gpu/drm/hisilicon/Kconfig              |  13 +
>>  drivers/gpu/drm/hisilicon/Makefile             |   3 +-
>>  drivers/gpu/drm/hisilicon/hisi_drm_connector.c |   4 +
>>  drivers/gpu/drm/hisilicon/hisi_drm_drv.c       |   9 +
>>  drivers/gpu/drm/hisilicon/hisi_drm_dsi.c       |  15 +
>>  drivers/gpu/drm/hisilicon/hisi_drm_fb.h        |   5 +
>>  drivers/gpu/drm/hisilicon/hisi_drm_fbdev.c     | 395 +++++++++++++++++++++++++
>>  drivers/gpu/drm/hisilicon/hisi_drm_fbdev.h     |  24 ++
>>  8 files changed, 467 insertions(+), 1 deletion(-)
>>  create mode 100644 drivers/gpu/drm/hisilicon/hisi_drm_fbdev.c
>>  create mode 100644 drivers/gpu/drm/hisilicon/hisi_drm_fbdev.h
> 
> 
> .
> 

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