drm/msm/dp: introduce stream_id for each DP panel

With MST, each DP controller can handle multiple streams. There shall be
one dp_panel for each stream but the dp_display object shall be shared
among them. To represent this abstraction, add a stream_id field to
struct msm_dp_panel and introduce the msm_dp_stream_id enum. For SST,
the field is initialized to DP_STREAM_0.

In the MST path, each panel will be assigned an actual stream_id at
stream-enable time by the MST layer (added in later patches).

Use the stream ID to control the pixel clock of that respective stream by
extending the clock handles and state tracking of the DP pixel clock to
an array of max supported streams. The maximum streams currently is 4.

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/756906/
Link: https://lore.kernel.org/r/20260929-msm-dp-mst-v7-4-4b81473185e7@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions