On Mon, Mar 03, 2025 at 01:23:11PM -0800, Abhinav Kumar wrote: > > > On 2/24/2025 7:14 PM, Dmitry Baryshkov wrote: > > On Mon, 24 Feb 2025 at 20:59, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote: > > > > > > > > > > > > On 2/19/2025 9:08 AM, Dmitry Baryshkov wrote: > > > > On Wed, Feb 19, 2025 at 06:02:20PM +0100, Krzysztof Kozlowski wrote: > > > > > On 17/02/2025 19:58, Dmitry Baryshkov wrote: > > > > > > On Mon, Feb 17, 2025 at 05:41:26PM +0100, Krzysztof Kozlowski wrote: > > > > > > > Add DisplayPort controller for Qualcomm SM8750 SoC which so far looks > > > > > > > fully compatible with earlier SM8650 variant. > > > > > > > > > > > > As that became a question for QCS8300, does SM8750 also support exactly > > > > > > two MST streams? > > > > > > > > > > v1.5 of DP (starting from SA8775p , then SM8650 and SM8750) support 4x > > > > > MST for DPTX0 and 2x MST for DPTX1. > > > > > > > > > > The DP in SM8650 and SM8750 are identical, according to datasheet (v1.5.1). > > > > > > > > Hmm. This also means that QCS8300 is compatible with SM8650. I'll let > > > > Abhinav comment here. > > > > > > > > > > DP version by itself is not a good measure of whether the controller can > > > support 4 streams or not. > > > > > > Firstly, sm8650/sm8750 do not have a DPTX1 so we are only discussing > > > about DP TX0. > > > > > > Coming to the QCS8300 Vs sm8650/sm8750, even though the DP controller > > > version is the same, there is no HW support for more than 2 streams on > > > sm8650/sm8750 because there are no INTF blocks to drive 4 streams. > > > > > > On sm8650/sm8750, only INTF_0 and INTF_3 can be used for DP. Hence 2 > > > streams. > > > > > > Whereas on Monaco, we have INTF_0, INTF_3, INTF_6 and INTF_7 capable of > > > > No idea what Monaco is, most likely it is some platform. Please use > > SoC names in public. > > > > Monaco is indeed QCS8300. I usually do use SoC names, in this instance just > intuitively ended up using the internal one as I use it often. > > > > driving DP. Hence 4 streams. > > > > > > Let me know if there are more questions. > > > > How many stream clocks are present on those platforms? I'm asking > > because there is a small, but not non-existing difference between 'DPs > > are not completely compatible / the same' and 'DPs are fully > > compatible but different DPU blocks impose different restrictions on > > the number of MST streams'. > > > > I have confirmed this internally. sm8650/sm8750 have only 2 stream clocks > and not 4. Ack, thanks. Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> -- With best wishes Dmitry
