Hi Sam,

Am 27.02.2020 um 13:23 schrieb Sam Ravnborg [off-list ref]:

Hi Nikolaus.

On Wed, Feb 26, 2020 at 08:12:52PM +0100, H. Nikolaus Schaller wrote:

quoted

This patch series adds HDMI output to the jz4780/CI20 board.

It is based on taking the old 3.18 vendor kernel 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.

Note: device tree bindings are from 2015 and still seem to
fit - except they are not in yaml format.

Original authors of most patches are
* Paul Boddie [off-list ref]
* Zubair Lutfullah Kakakhel [off-list ref]


H. Nikolaus Schaller (2):
 drm: ingenic-drm: add MODULE_DEVICE_TABLE
 MIPS: CI20: defconfig: configure for DRM_DW_HDMI_JZ4780

Paul Boddie (4):
 drm: ingenic: add jz4780 Synopsys HDMI driver.
 pinctrl: ingenic: add hdmi-ddc pin control group
 MIPS: DTS: jz4780: account for Synopsys HDMI driver and LCD controller
 MIPS: DTS: CI20: add HDMI setup

Zubair Lutfullah Kakakhel (2):
 dt-bindings: video: Add jz4780-lcd binding
 dt-bindings: video: Add jz4780-hdmi binding

.../bindings/display/ingenic-jz4780-hdmi.txt  |  41 ++++++
.../bindings/display/ingenic-jz4780-lcd.txt   |  39 ++++++

New bindings in DT Schema format please...
We want to have then in a formal launguage so we can use these
to verify the DT files.

Yes, I know. And I fully support the goal.

But I personally do not have the time to learn the (IMHO brain-twisting)
way the Schema format is working. Especially, I am not interested
in becoming volunteer translator for .txt based schemas developed
by someone else.

So I hope that someone from the community can and is willing to do
that.

Or that there will appear good tools soon. E.g. some GUI
based editor tool would be very helpful so that you don't have
to fight with the yaml indentation rules. Like there are XML
and DTD editors. And even HTML is rarely written manually any more.

IMHO such tools should have been developed and in place *before*
the rule to provide DT schemata is enforced.

Anyways, I have requested for comments (and did expect this one).

BR and thanks,
Nikolaus