linux-kernel - Re: [RFC 00/13] arm64: allwinner: Add A64 DE2 pipeline support

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Message-ID: <CAMty3ZCLOkdmCoh4uBhYKXgDEiAnw+b_z=d0Om2bjH7HLCa7Tg@mail.gmail.com>
Date:   Wed, 25 Apr 2018 18:29:05 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, Icenowy Zheng <icenowy@...c.io>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [RFC 00/13] arm64: allwinner: Add A64 DE2 pipeline support

On Tue, Apr 24, 2018 at 7:38 PM, Maxime Ripard
<maxime.ripard@...tlin.com> wrote:
> On Tue, Apr 24, 2018 at 07:04:12PM +0530, Jagan Teki wrote:
>> Allwinner A64 has display engine pipeline like other Allwinner SOC's A83T/H3/H5.
>>
>> A64 DE2 behaviour similar to Allwinner A83T where mixer0, connected to tcon0 with
>> RGB, LVDS MIPI-DSI and mixer1, connected to tcon1 with HDMI.
>> This series merely concentrated on HDMI pipeline and rest will add eventually.
>>
>> patch 1: dt-bindings for a64 DE2 CCU
>>
>> patch 2: a64 DE2 CCU node addition
>>
>> patch 3: dt-bindings for a64 DE2 pipeline
>>
>> patch 4 - 5: dt-bindings for a64 mixer0 and tcon-lcd
>>
>> patch 6: a64 DE2 pipeline node addition
>>
>> patch 7 - 8: dt-bindings for a64 HDMI and HDMI PHY
>>
>> patch 9: a64 HDMI nodes addition
>>
>> patch 10 - 11: dt-bindings for a64 mixer1 and tcon-tv
>>
>> patch 12: a64 HDMI pipeline
>>
>> patch 13: enable HDMI out on bananpi-m64
>>
>> Tested HDMI on bananapi-m64 (along with DE2 SRAM C changes from [1]
>> thread), able to detect the HDMI but, no penguins on screen.
>>
>> Request for any suggestions.
>>
>> Test log on Bananpi-m64:
>> [    0.247631] sun4i-drm display-engine: bound 1100000.mixer (ops sun8i_mixer_ops)
>> [    0.256717] sun4i-drm display-engine: bound 1200000.mixer (ops sun8i_mixer_ops)
>> [    0.256783] sun4i-tcon 1c0c000.lcd-controller: Missing LVDS properties, Please upgrade your DT
>> [    0.256792] sun4i-tcon 1c0c000.lcd-controller: LVDS output disabled
>
> That doesn't seem to work so well for LVDS.
>
>> [    0.257081] sun4i-drm display-engine: No panel or bridge found... RGB output disabled
>> [    0.257099] sun4i-drm display-engine: bound 1c0c000.lcd-controller (ops sun4i_tcon_ops)
>> [    0.257273] sun4i-drm display-engine: No panel or bridge found... RGB output disabled
>> [    0.257288] sun4i-drm display-engine: bound 1c0d000.lcd-controller (ops sun4i_tcon_ops)
>> [    0.258176] sun8i-dw-hdmi 1ee0000.hdmi: Detected HDMI TX controller v1.32a with HDCP (sun8i_dw_hdmi_p)
>> [    0.258596] sun8i-dw-hdmi 1ee0000.hdmi: registered DesignWare HDMI I2C bus driver
>> [    0.259188] sun4i-drm display-engine: bound 1ee0000.hdmi (ops sun8i_dw_hdmi_ops)
>> [    0.259199] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>> [    0.259205] [drm] No driver support for vblank timestamp query.
>> [    0.259308] [drm] Cannot find any crtc or sizes
>
> A good guess would be that you can't get the EDIDs for some
> reason. Have you tried forcing a mode to see if the display part
> already works?

Yes I've forced and used custom EDID with 1024x786 bin and observed
that the bin is able to load.

[    0.262973] [drm] No driver support for vblank timestamp query.
[    0.263842] [drm] Got built-in EDID base block and 0 extensions
from "edid/1024x768.bin" for connector

Jagan.

-- 
Jagan Teki
Senior Linux Kernel Engineer | Amarula Solutions
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.