Re: [PATCH v6 2/9] dt-bindings: display: add verisilicon,dc

[Drew Fustini <fustini@kernel.org>]

On Wed, Jan 28, 2026 at 12:34:41PM -0800, Drew Fustini wrote:
> On Fri, Jan 23, 2026 at 05:28:23PM +0800, Icenowy Zheng wrote:
> > From: Icenowy Zheng <uwu@icenowy.me>
> > 
> > Verisilicon has a series of display controllers prefixed with DC and
> > with self-identification facility like their GC series GPUs.
> > 
> > Add a device tree binding for it.
> > 
> > Depends on the specific DC model, it can have either one or two display
> > outputs, and each display output could be set to DPI signal or "DP"
> > signal (which seems to be some plain parallel bus to HDMI controllers).
> > 
> > Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
> > Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> > Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
> > ---
> > Changes in v6:
> > - Added Rob's R-b.
> > 
> > Changes in v5:
> > - Dropped the requirement of port@0.
> > - Dropped the if clause for TH1520, which seems to be not needed because
> >   of implicit DT binding rules.
> > 
> > Changes in v4:
> > - Added a comment for "verisilicon,dc" that says the ID/revision is
> >   discoverable via registers.
> > - Removed clock minItems constraint w/o specific compatible strings.
> > 
> > Changes in v3:
> > - Added SoC-specific compatible string, and arm the binding with clock /
> >   port checking for the specific SoC (with a 2-output DC).
> > 
> > Changes in v2:
> > - Fixed misspelt "versilicon" in title.
> > - Moved minItems in clock properties to be earlier than items.
> > - Re-aligned multi-line clocks and resets in example.
> > 
> >  .../bindings/display/verisilicon,dc.yaml      | 122 ++++++++++++++++++
> >  1 file changed, 122 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/verisilicon,dc.yaml
> 
> I've applied the bindings patches (1, 2, 4) to thead-dt-for-next as well
> so that 'make W=1 dtbs_check' won't break for the next release of
> linux-next.
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/fustini/linux.git/log/?h=thead-dt-for-next
> 
> Please see my reply to patch 1 for the rest of my message.

I've dropped the yaml patches from thead-dt-for-next based on Conor's
advice. Patches 1, 2 and 4 can go through drm.

Drew