Add initial support for slimport anx7625

Hi all,

The following series add support for the Slimport ANX7625 transmitter, a ultra-low power Full-HD 4K MIPI to DP transmitter designed for portable device.

This is the v9 version, any mistakes, please let me know, I will fix it in the next series.

Change history:
v9: Fix comments from Sam, Nicolas, Daniel
- Remove extcon interface.
- Remove DPI support.
- Fix dt_binding_check complains.
- Code clean up and update description.

v8: Fix comments from Nicolas.
- Fix several coding format.
- Update description.

v7:
- Fix critical timing(eg:odd hfp/hbp) in "mode_fixup" interface, enhance MIPI RX tolerance by setting register MIPI_DIGITAL_ADJ_1 to 0x3D.

Xin Ji (2):
dt-bindings: drm/bridge: anx7625: MIPI to DP transmitter binding drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP bridge driver

 .../bindings/display/bridge/analogix,anx7625.yaml  |   97 +
 drivers/gpu/drm/bridge/Makefile                    |    2 +-
 drivers/gpu/drm/bridge/analogix/Kconfig            |    8 +
 drivers/gpu/drm/bridge/analogix/Makefile           |    1 +
 drivers/gpu/drm/bridge/analogix/anx7625.c          | 1959 ++++++++++++++++++++
 drivers/gpu/drm/bridge/analogix/anx7625.h          |  397 ++++
 6 files changed, 2463 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
 create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
 create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h

2.7.4

The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed for portable device. It converts MIPI to DisplayPort 1.3 4K.

You can add support to your board with binding.

Example:

	anx7625_bridge: encoder@58 {
		compatible = "analogix,anx7625";
		reg = <0x58>;
		status = "okay";
		enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
		reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
		#address-cells = <1>;
		#size-cells = <0>;

		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			mipi2dp_bridge_in: port@0 {
				reg = <0>;
				anx7625_in: endpoint {
					remote-endpoint = <&mipi_dsi>;
				};
			};

			mipi2dp_bridge_out: port@1 {
				reg = <1>;
				anx7625_out: endpoint {
					remote-endpoint = <&panel_in>;
				};
			};
		};
	};

---
 .../bindings/display/bridge/analogix,anx7625.yaml  | 97 ++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml

new file mode 100644
index 0000000..c2c50b0
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 Analogix Semiconductor, Inc.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/display/bridge/analogix,anx7625.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Analogix ANX7625 SlimPort (4K Mobile HD Transmitter)
+
+maintainers:
+  - Xin Ji <[email protected]>
+
+description: |
+  The ANX7625 is an ultra-low power 4K Mobile HD Transmitter
+  designed for portable devices.
+
+properties:
+  "#address-cells": true
+  "#size-cells": true
+
+  compatible:
+    items:
+      - const: analogix,anx7625
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: used for interrupt pin B8.
+    maxItems: 1
+
+  enable-gpios:
+    description: used for power on chip control, POWER_EN pin D2.
+    maxItems: 1
+
+  reset-gpios:
+    description: used for reset chip control, RESET_N pin B7.
+    maxItems: 1
+
+  ports:
+    type: object
+
+    properties:
+      port@0:
+        type: object
+        description:
+          Video port for MIPI DSI input.
+
+      port@1:
+        type: object
+        description:
+          Video port for panel or connector.
+
+    required:
+        - port@0
+        - port@1
+
+required:
+  - "#address-cells"
+  - "#size-cells"
+  - compatible
+  - reg
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    anx7625_bridge: encoder@58 {
+        compatible = "analogix,anx7625";
+        reg = <0x58>;
+        enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
+        reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            mipi2dp_bridge_in: port@0 {
+                reg = <0>;
+                anx7625_in: endpoint {
+                    remote-endpoint = <&mipi_dsi>;
+                };
+            };
+
+            mipi2dp_bridge_out: port@1 {
+                reg = <1>;
+                anx7625_out: endpoint {
+                    remote-endpoint = <&panel_in>;
+                };
+            };
+        };
+    };

2.7.4

My bot found errors running 'make dt_binding_check' on your patch:

Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dts:21.13-26: Warning (reg_format): /example-0/encoder@58:reg: property has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1) Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: Warning (pci_device_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: Warning (pci_device_bus_num): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: Warning (simple_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: Warning (i2c_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/bridge/analogix,anx7625.example.dt.yaml: Warning (spi_bus_reg): Failed prerequisite 'reg_format'

See https://patchwork.ozlabs.org/patch/1280084

If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure dt-schema is up to date:

pip3 install git+https://github.com/devicetree-org/dt-schema.git@master --upgrade

Please check and re-submit.

Hi, thanks, I'll fix the warning in the next serial.

Thanks,
Xin

The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed for portable device. It converts MIPI DSI/DPI to DisplayPort 1.3 4K.

The ANX7625 can support both USB Type-C PD feature and MIPI DSI/DPI to DP feature. This driver only enabled MIPI DSI/DPI to DP feature.

---
 drivers/gpu/drm/bridge/Makefile           |    2 +-
 drivers/gpu/drm/bridge/analogix/Kconfig   |    8 +
 drivers/gpu/drm/bridge/analogix/Makefile  |    1 +
 drivers/gpu/drm/bridge/analogix/anx7625.c | 1959 +++++++++++++++++++++++++++++
 drivers/gpu/drm/bridge/analogix/anx7625.h |  397 ++++++
 5 files changed, 2366 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
 create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h

index 4934fcf..bcd388a 100644
@@ -12,8 +12,8 @@ obj-$(CONFIG_DRM_SII9234) += sii9234.o
 obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
 obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
 obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
-obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/
 obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
 obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
 obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
+obj-y += analogix/
 obj-y += synopsys/

index e930ff9..c772be2 100644
@@ -2,3 +2,11 @@
 config DRM_ANALOGIX_DP
 	tristate
 	depends on DRM
+
+config DRM_ANALOGIX_ANX7625
+	tristate "Analogix Anx7625 MIPI to DP interface support"
+	depends on DRM
+	depends on OF
+	help
+		ANX7625 is an ultra-low power 4K mobile HD transmitter designed
+		for portable devices. It converts MIPI/DPI to DisplayPort1.3 4K.

index fdbf3fd..b6c4a19 100644
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
 analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o
 obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o

2.7.4