Date:   Fri, 10 Nov 2017 13:15:30 +0100
From:   Enric Balletbo Serra <eballetbo@...il.com>
To:     Sean Paul <seanpaul@...omium.org>
Cc:     JeffyChen <jeffy.chen@...k-chips.com>,
        Mark Rutland <mark.rutland@....com>,
        Neil Armstrong <narmstrong@...libre.com>,
        David Airlie <airlied@...ux.ie>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Doug Anderson <dianders@...omium.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Romain Perier <romain.perier@...labora.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-samsung-soc@...r.kernel.org,
        Jonathan Corbet <corbet@....net>,
        Kevin Hilman <khilman@...libre.com>,
        Brian Norris <briannorris@...omium.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Caesar Wang <wxt@...k-chips.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Arnd Bergmann <arnd@...db.de>,
        "devicetree@...r.kernel.org" <devicetree@...r.kerne>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Rob Herring <robh+dt@...nel.org>,
        linux-amlogic@...ts.infradead.org,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        zain wang <wzz@...k-chips.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, tfiga@...omium.org,
        linux-renesas-soc@...r.kernel.org,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Kukjin Kim <kgene@...nel.org>, Carlo Caione <carlo@...one.org>,
        Emil Renner Berthing <kernel@...il.dk>
Subject: Re: [PATCH v6 00/10] rockchip: kevin: Enable edp display

Dear all,

2017-11-01 20:33 GMT+01:00 Sean Paul <seanpaul@...omium.org>:
> On Tue, Oct 31, 2017 at 12:37:43PM +0800, JeffyChen wrote:
>> Hi Heiko,
>>
>> On 10/31/2017 07:01 AM, Heiko Stuebner wrote:
>> > As I was just looking at the edp dts change in patch1 again, does this
>> > series also contain a fix for the issue below [0] ?
>> >
>> > I'm still seeing this on 4.14-rc6 with the most recent drm tree merged in.
>> >
>> i saw that too, it should due to our psr code...i think Zain has solved
>> these in chromeos kernel, i will ask Zain if he have time to upstream them,
>> or maybe i'll try to upstream them.
>
> You need the patchset where I've refactored the psr locking/workers. I have a
> version of it based on Heiko's tree at
> https://cgit.freedesktop.org/~seanpaul/dogwood/log/?h=rk3399-display
>
> With this kernel, the backlight comes on, but I don't have anything on the
> display (which is why I didn't post it). I'll try putting this set on top and
> see what happens.
>

There is a patch in the ML sent by Emil [1], similar to the Sean
patch, that solves the issue.

And I can confirm that the Jeffy's patches + Emil patch makes the
display work on kevin or current rc8

[1] https://patchwork.kernel.org/patch/9985237/

Enric

> Sean
>
>> >
>> > Heiko
>> >
>> > [0]
>> >
>> > [   27.960120] BUG: scheduling while atomic: kworker/1:1/68/0x00000002
>> > [   27.974429] Modules linked in: rockchipdrm dw_hdmi analogix_dp drm_kms_helper panel_simple crc32_ce drm crct10dif_ce rockchip_saradc pwm_bl pwm_cros_ec rockchip_thermal ip_tables x_tabl
>> > es ipv6 smsc95xx smsc75xx ax88179_178a asix usbnet phy_rockchip_pcie pcie_rockchip
>> > [   28.008769] CPU: 1 PID: 68 Comm: kworker/1:1 Tainted: G        W       4.14.0-rc7-03201-g12490811b353 #559
>> > [   28.008774] Hardware name: Google Kevin (DT)
>> > [   28.008825] Workqueue: events analogix_dp_psr_work [rockchipdrm]
>> > [   28.008828] Call trace:
>> > [   28.008838] [<ffff000008088d60>] dump_backtrace+0x0/0x378
>> > [   28.008842] [<ffff0000080890ec>] show_stack+0x14/0x20
>> > [   28.008847] [<ffff0000089b04d8>] dump_stack+0x9c/0xbc
>> > [   28.008852] [<ffff0000080ec4b4>] __schedule_bug+0x4c/0x70
>> > [   28.008856] [<ffff0000089c4828>] __schedule+0x558/0x5e8
>> > [   28.008859] [<ffff0000089c48f0>] schedule+0x38/0xa0
>> > [   28.008864] [<ffff0000089c8194>] schedule_hrtimeout_range_clock+0x84/0xe8
>> > [   28.008867] [<ffff0000089c8208>] schedule_hrtimeout_range+0x10/0x18
>> > [   28.008870] [<ffff0000089c7c74>] usleep_range+0x64/0x78
>> > [   28.008882] [<ffff000000ef56e4>] analogix_dp_transfer+0x16c/0xa88 [analogix_dp]
>> > [   28.008891] [<ffff000000ef2190>] analogix_dpaux_transfer+0x10/0x18 [analogix_dp]
>> > [   28.008950] [<ffff000000ddbb1c>] drm_dp_dpcd_access+0x4c/0xf8 [drm_kms_helper]
>> > [   28.008994] [<ffff000000ddbbe4>] drm_dp_dpcd_write+0x1c/0x28 [drm_kms_helper]
>> > [   28.009002] [<ffff000000ef2130>] analogix_dp_disable_psr+0x60/0xb0 [analogix_dp]
>> > [   28.009036] [<ffff000000f8398c>] analogix_dp_psr_work+0x4c/0xc0 [rockchipdrm]
>> > [   28.009040] [<ffff0000080dff44>] process_one_work+0x1d4/0x348
>> > [   28.009043] [<ffff0000080e0100>] worker_thread+0x48/0x470
>> > [   28.009048] [<ffff0000080e63d4>] kthread+0x12c/0x130
>> > [   28.009052] [<ffff000008084b88>] ret_from_fork+0x10/0x18
>> >
>> >
>> >
>> >
>>
>>
>
> --
> Sean Paul, Software Engineer, Google / Chromium OS
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