Re: [PATCH 1/4] dt-bindings: display/msm: Redocument the dp-controller for QCS8300

[Yongxing Mou]

On 2025/2/12 20:26, Dmitry Baryshkov wrote:
> On Wed, 12 Feb 2025 at 12:54, Krzysztof Kozlowski <krzk@xxxxxxxxxx> wrote:
> > On 12/02/2025 11:41, Dmitry Baryshkov wrote:
> > > On Wed, Feb 12, 2025 at 03:12:24PM +0800, Yongxing Mou wrote:
> > > > We need to enable mst for qcs8300, dp0 controller will support 2 streams
> > > > output. So not reuse sm8650 dp controller driver and will add a new driver
> > > > patch for qcs8300 mst feature. Modify the corresponding dt-bingding file
> > > > to compatible with the qcs8300-dp.
> > >
> > > NAK for a different reason: QCS8300 is still compatible with SM8650.
> > > Enable features instead of randomly reshuffle compats. In this case,
> > > enable MST for both architectures.
> > So the original patch was probably correct...
>
> I have no idea. I'd let Yongxing Mou to comment on this. It would be
> nice  instead of getting a lengthy explanation of obvious items to get
> an answer to an actual question: is QCS8300 compatible with SM8650 or
> not. In other words whether they can support the same number of MST
> streams on each controller or not.
Hi, in hardware, the SM8650's DP controller supports 2 INTFs, while the 
QCS8300's DP0 controller supports 4 INTFs.In sst mode, only one INTF 
will be used, they are same, but for MST, sm8650 supports 2 streams 
while qcs8300 support 4 streams. Thanks.