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arm64: qcom: sm8650: add support for DisplayPort Controller

This adds support for the DisplayPort Controller found in the SM8650
SoC, but it requires a specific compatible because the registers offsets
has changed since SM8550.

This also updates the SM8650 MDSS bindings to allow a displayport subnode,
and adds the necessary changes in the SM8650 DTSI to declare the DisplayPort
Controller.

Dependencies:
- DT: https://lore.kernel.org/all/20231130-topic-sm8650-upstream-dt-v5-0-b25fb781da52@linaro.org/

To: Rob Clark <robdclark@gmail.com>
To: Abhinav Kumar <quic_abhinavk@quicinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Sean Paul <sean@poorly.run>
To: Marijn Suijten <marijn.suijten@somainline.org>
To: David Airlie <airlied@gmail.com>
To: Daniel Vetter <daniel@ffwll.ch>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
To: Maxime Ripard <mripard@kernel.org>
To: Thomas Zimmermann <tzimmermann@suse.de>
To: Rob Herring <robh+dt@kernel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Kuogee Hsieh <quic_khsieh@quicinc.com>
To: Andy Gross <agross@kernel.org>
To: Bjorn Andersson <andersson@kernel.org>
To: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

---
Neil Armstrong (3):
      dt-bindings: display: msm: dp-controller: document SM8650 compatible
      drm/msm/dp: Add DisplayPort controller for SM8650
      arm64: dts: qcom: sm8650: Add DisplayPort device nodes

 .../bindings/display/msm/dp-controller.yaml        |   1 +
 .../bindings/display/msm/qcom,sm8650-mdss.yaml     |   6 ++
 arch/arm64/boot/dts/qcom/sm8650.dtsi               | 120 ++++++++++++++++++++-
 drivers/gpu/drm/msm/dp/dp_display.c                |   6 ++
 4 files changed, 131 insertions(+), 2 deletions(-)
---
base-commit: 9ea914fd2cc702e8be88c0666d4df3e58ffe8131
change-id: 20231207-topic-sm8650-upstream-dp-ab1fc1bf0c76

Best regards,