Re: [PATCH v2 1/2] arm64: dts: qcom: shikra-iqs-evk: Add LT9611UXD HDMI bridge support

[Mohit Dsor <mohit.dsor@oss.qualcomm.com>]

On Wed, Jul 22, 2026 at 04:49:45PM +0300, Dmitry Baryshkov wrote:
> On Sat, Jul 18, 2026 at 04:54:07PM +0530, Mohit Dsor wrote:
> > On Fri, Jul 17, 2026 at 11:17:10AM +0200, Konrad Dybcio wrote:
> > > On 7/16/26 9:30 PM, mohit.dsor@oss.qualcomm.com wrote:
> > > > From: Mohit Dsor <mdsor@oss.qualcomm.com>
> > > > 
> > > > Enable the Shikra MDSS display subsystem on the Qualcomm Shikra IQS
> > > > EVK board and add the Lontium LT9611UXD DSI-to-HDMI bridge node.
> > > > 
> > > > The LT9611UXD is connected via I2C (bus 4, address 0x41), powered by
> > > > a GPIO-controlled 3.3V regulator (PM8150 GPIO4) and an always-on 1.8V
> > > > rail. Reset is on GPIO76 and interrupt on GPIO85.
> > > > 
> > > > The bridge receives DSI output from MDSS and drives an HDMI-A
> > > > connector, with the link wired as: DPU -> DSI0 -> LT9611UXD -> HDMI.
> > > > 
> > > > Signed-off-by: Mohit Dsor <mohit.dsor@oss.qualcomm.com>
> > > > ---
> > > 
> > > Does the other EVK not have this same hardware?
> > Yes other variants have this hardware but only IQS variant has
> > DS-HDMI as default, others have DLC panel as default.
> 
> By 'default' do you mean some DIP switches? If so, please consider
> providing overlays for the bridge to be used on other variants of the
> EVK.
There are separate daughter cards for DLC Panel and DSI-HDMI, at a time
only one of them can be connected.
We are planning to submit a separate patch series covering all overlays together, if that is Ok
DLC panel overlay for the IQ variant
DSI-to-HDMI overlays for the CQ and CM variants
> 
> > > 
> > > [...]
> > > 
> > > > +&pm8150_l11 {
> > > > +	/* DSI VDDA - must be at NOM voltage for PHY PLL lock */
> > > 
> > > This comment is superfluous
> > This comment will be removed in next revision.
> > > 
> > > Konrad
> 
> -- 
> With best wishes
> Dmitry