linux-kernel - Re: [linux-sunxi] [PATCH v2 00/27] Add support for R40 HDMI pipeline

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Date:   Mon, 18 Jun 2018 16:43:56 +0200
From:   Jernej Škrabec <jernej.skrabec@...l.net>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        David Airlie <airlied@...ux.ie>, gustavo@...ovan.org,
        maarten.lankhorst@...ux.intel.com,
        Sean Paul <seanpaul@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH v2 00/27] Add support for R40 HDMI pipeline

Dne ponedeljek, 18. junij 2018 ob 14:58:02 CEST je Jagan Teki napisal(a):
> On Thu, Jun 14, 2018 at 10:59 PM, Jernej Škrabec
> 
> <jernej.skrabec@...l.net> wrote:
> > Dne četrtek, 14. junij 2018 ob 19:16:46 CEST je Jagan Teki napisal(a):
> >> On Thu, Jun 14, 2018 at 8:04 PM, Jernej Škrabec <jernej.skrabec@...l.net>
> > 
> > wrote:
> >> > Dne četrtek, 14. junij 2018 ob 09:12:41 CEST je Jagan Teki napisal(a):
> >> >> On Wed, Jun 13, 2018 at 1:30 AM, Jernej Skrabec
> >> >> <jernej.skrabec@...l.net>
> >> > 
> >> > wrote:
> >> >> > This series adds support for R40 HDMI pipeline. It is a bit special
> >> >> > than other already supported pipelines because it has additional
> >> >> > unit
> >> >> > called TCON TOP responsible for relationship configuration between
> >> >> > mixers, TCONs and HDMI. Additionally, it has additional gates for
> >> >> > DSI
> >> >> > and TV TCONs, TV encoder clock settings and pin muxing between LCD
> >> >> > and TV encoders.
> >> >> > 
> >> >> > However, it seems that TCON TOP will become a norm, since newer
> >> >> > Allwinner SoCs like H6 also have this unit.
> >> >> > 
> >> >> > I tested different possible configurations:
> >> >> > - mixer0 <> TCON-TV0 <> HDMI
> >> >> > - mixer0 <> TCON-TV1 <> HDMI
> >> >> > - mixer1 <> TCON-TV0 <> HDMI
> >> >> > - mixer1 <> TCON-TV1 <> HDMI
> >> >> > 
> >> >> > Please review.
> >> >> > 
> >> >> > Best regards,
> >> >> > Jernej
> >> >> > 
> >> >> > Changes from v1:
> >> >> > - Split DT bindings patch and updated description
> >> >> > - Split HDMI PHY patch
> >> >> > - Move header file from TCON TOP patch to dt bindings patch
> >> >> > - Added Rob reviewed-by tag
> >> >> > - Used clk_hw_register_gate() instead of custom gate registration
> >> >> > code
> >> >> > - Reworked TCON TOP to be part of of-graph. Because of that, a lot
> >> >> > of
> >> >> > 
> >> >> >   new patches were added.
> >> >> > 
> >> >> > - Droped mixer index quirk patch
> >> >> > - Reworked TCON support for TCON TOP
> >> >> > - Updated commit messages
> >> >> > 
> >> >> > Jernej Skrabec (27):
> >> >> >   clk: sunxi-ng: r40: Add minimal rate for video PLLs
> >> >> >   clk: sunxi-ng: r40: Allow setting parent rate to display related
> >> >> >   
> >> >> >     clocks
> >> >> >   
> >> >> >   clk: sunxi-ng: r40: Export video PLLs
> >> >> >   dt-bindings: display: sunxi-drm: Add TCON TOP description
> >> >> >   drm/sun4i: Add TCON TOP driver
> >> >> >   drm/sun4i: Fix releasing node when enumerating enpoints
> >> >> >   drm/sun4i: Split out code for enumerating endpoints in output port
> >> >> >   drm/sun4i: Add support for traversing graph with TCON TOP
> >> >> >   drm/sun4i: Don't skip TCONs if they don't have channel 0
> >> >> >   dt-bindings: display: sun4i-drm: Add R40 TV TCON description
> >> >> >   drm/sun4i: tcon: Add support for tcon-top gate
> >> >> >   drm/sun4i: tcon: Generalize engine search algorithm
> >> >> >   drm/sun4i: Don't check for LVDS and RGB when TCON has only ch1
> >> >> >   drm/sun4i: Don't check for panel or bridge on TV TCONs
> >> >> >   drm/sun4i: Add support for R40 TV TCON
> >> >> >   dt-bindings: display: sun4i-drm: Add R40 mixer compatibles
> >> >> >   drm/sun4i: Add support for R40 mixers
> >> >> >   dt-bindings: display: sun4i-drm: Add description of A64 HDMI PHY
> >> >> >   drm/sun4i: Enable DW HDMI PHY clock
> >> >> >   drm/sun4i: Don't change clock bits in DW HDMI PHY driver
> >> >> >   drm/sun4i: DW HDMI PHY: Add support for second PLL
> >> >> >   drm/sun4i: Add support for second clock parent to DW HDMI PHY clk
> >> >> >   
> >> >> >     driver
> >> >> >   
> >> >> >   drm/sun4i: Add support for A64 HDMI PHY
> >> >> >   drm: of: Export drm_crtc_port_mask()
> >> >> >   drm/sun4i: DW HDMI: Expand algorithm for possible crtcs
> >> >> >   ARM: dts: sun8i: r40: Add HDMI pipeline
> >> >> >   ARM: dts: sun8i: r40: Enable HDMI output on BananaPi M2 Ultra
> >> >> 
> >> >> Tested whole series on top of linux-next.
> >> >> 
> >> >> Tested-by: Jagan Teki <jagan@...rulasolutions.com>
> >> > 
> >> > Thanks!
> >> 
> >> I've V40 board, which is same as R40. I'm able to detect the HDMI but
> >> seems edid not detecting properly.
> >> 
> >> [    0.983007] sun4i-drm display-engine: bound 1100000.mixer (ops
> >> 0xc074a80c) [    0.999043] sun4i-drm display-engine: bound 1200000.mixer
> >> (ops 0xc074a80c) [    1.006229] sun4i-drm display-engine: bound
> >> 1c70000.tcon-top (ops 0xc074e2ac) [    1.013609] sun4i-drm
> >> display-engine:
> >> bound 1c73000.lcd-controller (ops 0xc0747a28)
> >> [    1.053988] sun8i-dw-hdmi 1ee0000.hdmi: Detected HDMI TX controller
> >> v1.32a with HDCP (sun8i_dw_hdmi_phy)
> >> [    1.063913] sun8i-dw-hdmi 1ee0000.hdmi: registered DesignWare HDMI
> >> I2C bus driver
> >> [    1.071683] sun4i-drm display-engine: bound 1ee0000.hdmi (ops
> >> 0xc074a298) [    1.078484] [drm] Supports vblank timestamp caching Rev 2
> >> (21.10.2013). [    1.085098] [drm] No driver support for vblank
> >> timestamp query. [ 1.091055] [drm] Cannot find any crtc or sizes
> >> [    1.095995] [drm] Initialized sun4i-drm 1.0.0 20150629 for
> >> display-engine on minor 0
> > 
> > This seems like DT issue. Can you post somewhere your V40 DTSI (if it is
> > different to R40) and board DTS?
> 
> same dtsi shared between r40 and v40, here is board dts support for HDMI[1]
> 
> [1] https://paste.ubuntu.com/p/wqVz38BHrM/

This patch looks like exactly the same as mine for BananaPi M2U, so there 
should be no issues.

What about VCC-HDMI? Is powered? Can you measure it to check?

Best regards,
Jernej