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

Maxime Ripard
2018-04-25T13:55:48Z

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On Wed, Apr 25, 2018 at 06:29:05PM +0530, Jagan Teki wrote:
> On Tue, Apr 24, 2018 at 7:38 PM, Maxime Ripard
> <maxime.ripard-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org> 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

It's not really clear, is it displaying something?

Maxime

--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering