On 9/8/2025 6:04 PM, Dmitry Baryshkov wrote:
On Mon, Sep 08, 2025 at 05:46:30PM +0800, Yongxing Mou wrote:
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?
What makes you think that we can't? Let me repharse the question: which
part of DP controller (single one) on QCS8300 is incompatible with the
DP controller on SA8775P?
Sure.. got this point.. will update next version.. for the single one ,
they are same...
Thanks.>>
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
