linux-kernel - [RFC v3 0/8] MIPS: CI20: add HDMI out support

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Date:   Sun, 29 Mar 2020 19:35:46 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Paul Cercueil <paul@...pouillou.net>,
        Paul Boddie <paul@...die.org.uk>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Kees Cook <keescook@...omium.org>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-gpio@...r.kernel.org, letux-kernel@...nphoenux.org,
        mips-creator-ci20-dev@...glegroups.com
Subject: [RFC v3 0/8] MIPS: CI20: add HDMI out support

+++ help is needed: driver is not completely working and shows no output signal on the HDMI data and clock lanes
+++ HPD is working and /dev/fb0 does appear
+++ but there is no trigger to initialize the lcdc

* add definition for second jz4780-lcdc
* diverse fixes for yaml schema
* make ingenic-drm driver compatible to ingenic,jz4780-lcd
* converted existing ingenic,lcd.txt to ingenic,lcd.yaml - suggested by Paul Cercueil <paul@...pouillou.net>
* removed blank line before MODULE_DEVICE_TABLE() macro - Paul Cercueil <paul@...pouillou.net>
* added some missing Signed-off:
* removed Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com> from the
  recipients list and Cc: since the address is no longer available.
* removed "pinctrl: ingenic: add hdmi-ddc pin control group" from this patch
  series since it is already applied elsewhere (by Linus Walleij <linus.walleij@...aro.org>)

RFC V2 2020-02-28 19:19:40:
* Converted .txt bindings to .yaml (by Sam Ravnborg <sam@...nborg.org> - big THANKS)

RFC V1 2020-02-26 20:13:06:
This patch series adds HDMI output to the jz4780/CI20 board.

It is based on taking the old 3.18 vendor kernel as well as
an earlier submission from 2015:
https://lore.kernel.org/patchwork/patch/547872/
and trying to achieve the same with modern DTS setup and new/modified
drivers.

Unfortunately, in this first RFC, only EDID and creation of
/dev/fb0 are working. Also, HDMI hot plugging is detected.

But there is no HDMI output signal. So some tiny piece seems
to be missing to enable/configure the Synposys HDMI controller.

We need help from the community to fix this.

Original authors of most patches are
* Paul Boddie <paul@...die.org.uk>
* Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>

H. Nikolaus Schaller (4):
  dt-bindings: display: convert ingenic,lcd.txt to ingenic,lcd.yaml
  drm: ingenic-drm: add MODULE_DEVICE_TABLE
  drm: ingenic-drm: add support for ingenic,jz4780-lcd
  MIPS: CI20: defconfig: configure for DRM_DW_HDMI_JZ4780

Paul Boddie (3):
  drm: ingenic: add jz4780 Synopsys HDMI driver
  MIPS: DTS: jz4780: account for Synopsys HDMI driver and LCD controller
  MIPS: DTS: CI20: add HDMI setup

Sam Ravnborg (1):
  dt-bindings: display: add ingenic-jz4780-hdmi DT Schema

 .../bindings/display/ingenic,lcd.txt          |  45 ------
 .../bindings/display/ingenic,lcd.yaml         | 128 ++++++++++++++++++
 .../bindings/display/ingenic-jz4780-hdmi.yaml |  82 +++++++++++
 arch/mips/boot/dts/ingenic/ci20.dts           |  64 +++++++++
 arch/mips/boot/dts/ingenic/jz4780.dtsi        |  46 +++++++
 arch/mips/configs/ci20_defconfig              |   3 +
 drivers/gpu/drm/ingenic/Kconfig               |   8 ++
 drivers/gpu/drm/ingenic/Makefile              |   1 +
 drivers/gpu/drm/ingenic/dw_hdmi-jz4780.c      | 120 ++++++++++++++++
 drivers/gpu/drm/ingenic/ingenic-drm.c         |   8 ++
 10 files changed, 460 insertions(+), 45 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/display/ingenic,lcd.txt
 create mode 100644 Documentation/devicetree/bindings/display/ingenic,lcd.yaml
 create mode 100644 Documentation/devicetree/bindings/display/ingenic-jz4780-hdmi.yaml
 create mode 100644 drivers/gpu/drm/ingenic/dw_hdmi-jz4780.c

-- 
2.25.1