Re: [PATCH 1/3] dt-bindings: display: msm: Allow two MDSS power domains

[Yongxing Mou]

On 7/22/2026 2:20 AM, Dmitry Baryshkov wrote:
> On Mon, Jul 20, 2026 at 04:43:53PM +0800, Yongxing Mou wrote:
> > Kaanapali (SM8750) and Glymur use two display power domains.
> > CORE_GDSC powers the main display hardware while INT2_GDSC
> > powers a subset of SSPP blocks.
> >
> > Allow the MDSS bindings to describe both power domains and
> > their corresponding power-domain-names values.
>
> Another question... If INT2_GDSC only powers up a subset of SSPPs, why
> is it being declared as powering up the full MDSS? Can we move it to the
> DPU device instead?
Hmm, yes, it only use for VIG2/VIG3/DMA5 here. we can move it to DPU. 
Since listing more than one power-domain disables auto-attach, a small 
driver change is needed to attach both domains explicitly — MMCX with 
PD_FLAG_REQUIRED_OPP to keep performance-state voting working, INT2_GDSC 
as a plain runtime-PM supplier.
> > Signed-off-by: Yongxing Mou <yongxing.mou@xxxxxxxxxxxxxxxx>
> > ---
> >   .../devicetree/bindings/display/msm/mdss-common.yaml        |  3 ++-
> >   .../devicetree/bindings/display/msm/qcom,glymur-mdss.yaml   | 13 ++++++++++++-
> >   .../bindings/display/msm/qcom,kaanapali-mdss.yaml           | 13 ++++++++++++-
> >   3 files changed, 26 insertions(+), 3 deletions(-)