[PATCH v2 05/22] dt-bindings: host1x: Document new interconnect properties

Dmitry Osipenko
2020-03-30T01:11:01Z

Most of Host1x devices have at least one memory client. These clients
are directly connected to the memory controller. The new interconnect
properties represent the memory client's connection to the memory
controller.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
.../display/tegra/nvidia,tegra20-host1x.txt | 68 +++++++++++++++++++
1 file changed, 68 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
index 9999255ac5b6..d92d4e814d77 100644
--- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
+++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
@@ -20,6 +20,10 @@ Required properties:
- reset-names: Must include the following entries:
- host1x

+Each host1x client module having to perform DMA through the Memory Controller
+should have the interconnect endpoints set to the Memory Client and External
+Memory respectively.
+
The host1x top-level node defines a number of children, each representing one
of the following host1x client modules:

@@ -36,6 +40,12 @@ of the following host1x client modules:
- reset-names: Must include the following entries:
- mpe

+ Optional properties:
+ - interconnects: Must contain entry for the MPE memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
- vi: video input

Required properties:
@@ -49,6 +59,12 @@ of the following host1x client modules:
- reset-names: Must include the following entries:
- vi

+ Optional properties:
+ - interconnects: Must contain entry for the VI memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
- epp: encoder pre-processor

Required properties:
@@ -62,6 +78,12 @@ of the following host1x client modules:
- reset-names: Must include the following entries:
- epp

+ Optional properties:
+ - interconnects: Must contain entry for the EPP memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
- isp: image signal processor

Required properties:
@@ -75,6 +97,12 @@ of the following host1x client modules:
- reset-names: Must include the following entries:
- isp

+ Optional properties:
+ - interconnects: Must contain entry for the ISP memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
- gr2d: 2D graphics engine

Required properties:
@@ -88,6 +116,12 @@ of the following host1x client modules:
- reset-names: Must include the following entries:
- 2d

+ Optional properties:
+ - interconnects: Must contain entry for the GR2D memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
- gr3d: 3D graphics engine

Required properties:
@@ -106,6 +140,12 @@ of the following host1x client modules:
- 3d
- 3d2 (Only required on SoCs with two 3D clocks)

+ Optional properties:
+ - interconnects: Must contain entry for the GR3D memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
- dc: display controller

Required properties:
@@ -133,6 +173,10 @@ of the following host1x client modules:
- nvidia,hpd-gpio: specifies a GPIO used for hotplug detection
- nvidia,edid: supplies a binary EDID blob
- nvidia,panel: phandle of a display panel
+ - interconnects: Must contain entry for the DC memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.

- hdmi: High Definition Multimedia Interface

@@ -281,6 +325,12 @@ of the following host1x client modules:
- reset-names: Must include the following entries:
- vic

+ Optional properties:
+ - interconnects: Must contain entry for the VIC memory clients.
+ - interconnect-names: Must include name of the interconnect path for each
+ interconnect entry. Consult TRM documentation for information about
+ available memory clients.
+
Example:

/ {
@@ -363,6 +413,15 @@ Example:
resets = <&tegra_car 27>;
reset-names = "dc";

+ interconnects = <&mc TEGRA20_MC_DISPLAY0A &emc>,
+ <&mc TEGRA20_MC_DISPLAY0B &emc>,
+ <&mc TEGRA20_MC_DISPLAY0C &emc>,
+ <&mc TEGRA20_MC_DISPLAY1B &emc>;
+ interconnect-names = "display0a",
+ "display0b",
+ "display0c",
+ "display1b";
+
rgb {
status = "disabled";
};
@@ -378,6 +437,15 @@ Example:
resets = <&tegra_car 26>;
reset-names = "dc";

+ interconnects = <&mc TEGRA20_MC_DISPLAY0AB &emc>,
+ <&mc TEGRA20_MC_DISPLAY0BB &emc>,
+ <&mc TEGRA20_MC_DISPLAY0CB &emc>,
+ <&mc TEGRA20_MC_DISPLAY1BB &emc>;
+ interconnect-names = "display0a",
+ "display0b",
+ "display0c",
+ "display1b";
+
rgb {
status = "disabled";
};
--
2.25.1