Re: The failure summary report of GEN2 for linux stable v4.8

From: Xuan Truong Nguyen <nx-truong@jinso.co.jp>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: duclm <lm-duc@jinso.co.jp>,
	ryusuke.sakato.bx@renesas.com, kuninori.morimoto.gx@renesas.com,
	magnus.damm@gmail.com, geert+renesas@glider.be,
	h-inayoshi@jinso.co.jp, yoshihiro.shimoda.uh@renesas.com,
	nv-dung@jinso.co.jp, cm-hiep@jinso.co.jp,
	laurent.pinchart+renesas@ideasonboard.com,
	horms+renesas@verge.net.au, linux-renesas-soc@vger.kernel.org,
	wsa@sang-engineering.com
Subject: Re: The failure summary report of GEN2 for linux stable v4.8
Date: Fri, 11 Nov 2016 11:44:37 +0900	[thread overview]
Message-ID: <b0a73d94-6f5f-de40-7790-c91af576f96e@jinso.co.jp> (raw)
In-Reply-To: <2073526.U7B9OGNC0q@avalon>

Hi Laurent

please check this when you have time.

If you need any information,  let us know.

thanks and best regard

JINSO/Truong

On 2016年11月11日 10:31, Laurent Pinchart wrote:
> Hello Truong,
>
> On Friday 21 Oct 2016 14:20:24 Laurent Pinchart wrote:
>> On Friday 21 Oct 2016 19:53:47 Xuan Truong Nguyen wrote:
>>> Hello Laurent.
>>>
>>>> The document mentions that you have used shmobile_defconfig. However,
>>>> that configuration in v4.8 doesn't enable CONFIG_CMA, which causes at
>>>> least the DU driver to fail probing the device. I thus assume you have
>>>> modified the configuration to enable CMA. The fact that
>>>> shmobile_defconfig doesn't include the uvcvideo driver used by test 14
>>>> seems to confirm local modifications to the configuration.
>>>> Issue 8 ("Lager: bad image quality when shown on HDMI display") can't be
>>>> reproduced on my system when displaying a test pattern with the modetest
>>>> application. Could you please share more information on how to reproduce
>>>> the problem ?
>>> We retested this issue No 8 again with the CONFIG_CMA enabled but the
>>> result is the same. you could see it by the error.jpg image in
>>> attachments. the display device used is Panasonic TH-L19C3 (refer the
>>> device.jpg). we also send you my configs file, too (lager_du.config).
>> Thank you for the information, I'll try to reproduce the problem here with
>> your kernel configuration.
> I've been able to reproduce the problem here, and at this point I'm not sure
> what goes wrong. I've tested older kernels up to the point where HDMI support
> for Lager was introduced, and the bug was present in all of them. I'll try to
> fix it, but I have other higher priority tasks at the moment.
>
>>> just one more thing, with CONFIG_CMA enabled, the driver fails on
>>> probing if we boot the board without the HDMI cable inserted in advance.
>>> we have to insert the cable before booting the board. and not all the
>>> display work with current HDMI driver (as our LG display will not work)
>>> we are using the mainline upstream version 4.8
>> Interesting, I'll check that too.
> I haven't had time to check this yet.
>
>>> if you need any information to debug, please lets us know.
>> Could you please tell me what you're using to test the display ?