Some A3xx and all A4xx Adreno GPUs do not have GMEM inside the GPU core
and must use the On Chip MEMory (OCMEM) in order to be functional.
There's a separate interconnect path that needs to be setup to OCMEM.
Let's document this second interconnect path that's available.
Signed-off-by: Brian Masney <masneyb@xxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/display/msm/gpu.txt | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/display/msm/gpu.txt b/Documentation/devicetree/bindings/display/msm/gpu.txt
index 2b8fd26c43b0..3e6cd3f64a78 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gpu.txt
@@ -23,7 +23,10 @@ Required properties:
- iommus: optional phandle to an adreno iommu instance
- operating-points-v2: optional phandle to the OPP operating points
- interconnects: optional phandle to an interconnect provider. See
- ../interconnect/interconnect.txt for details.
+ ../interconnect/interconnect.txt for details. Some A3xx and all A4xx platforms
+ will have two paths; all others will have one path.
+- interconnect-names: The names of the interconnect paths that correspond to the
+ interconnects property. Values must be gfx-mem and ocmem.
- qcom,gmu: For GMU attached devices a phandle to the GMU device that will
control the power for the GPU. Applicable targets:
- qcom,adreno-630.2
@@ -76,6 +79,7 @@ Example a6xx (with GMU):
operating-points-v2 = <&gpu_opp_table>;
interconnects = <&rsc_hlos MASTER_GFX3D &rsc_hlos SLAVE_EBI1>;
+ interconnect-names = "gfx-mem";
qcom,gmu = <&gmu>;
--
2.21.0
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