On 9/5/2025 9:48 PM, Dmitry Baryshkov wrote:
On Fri, Sep 05, 2025 at 10:50:33AM +0800, Yongxing Mou wrote:
On 9/4/2025 9:43 PM, Dmitry Baryshkov wrote:
On Thu, Sep 04, 2025 at 03:22:37PM +0800, Yongxing Mou wrote:
Add compatible string for the DisplayPort controller found on the
Qualcomm QCS8300 SoC.
The Qualcomm QCS8300 platform comes with one DisplayPort controller
that supports 4 MST streams.
Signed-off-by: Yongxing Mou <yongxing....@oss.qualcomm.com>
---
.../bindings/display/msm/dp-controller.yaml | 22
++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index
aeb4e4f36044a0ff1e78ad47b867e232b21df509..ad08fd11588c45698f7e63ecc3218a749fc8ca67
100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -18,6 +18,7 @@ properties:
compatible:
oneOf:
- enum:
+ - qcom,qcs8300-dp
Can we use fallback to qcom,sa8775p-dp instead of declaring a completely
new one?
I think we can not use fallback to sa8775p, since we don't have DP1
controller for QCS8300. SA8775P actually have 4 DP controllers (now only 2
really used). So in the hardware, i think it is different with SA8775P and
we need a new one.>> - qcom,sa8775p-dp
The DP controller is the same as the one present on SA8775P.
Yes, it is same.. I just want to confirm again—even if we only need DP0
for QCS8300, we can also use sa8775p as fallback, right?
static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0,
.wide_bus_supported = true },
{ .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1,
.wide_bus_supported = true },
{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2,
.wide_bus_supported = true },
{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3,
.wide_bus_supported = true },
{}
};
.mst_streams = 4 is suitable for both QCS8300 and SA8775P DP 0 here.
Previously, my understanding here was that we might need a new
compatible for QCS8300.
Thanks~~>>>> - qcom,sc7180-dp
- qcom,sc7280-dp
