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 v17 version, any mistakes, please let me know, I will fix it in the next series.

Change history:
v17: Fix comments from Dan
- Fix possible memory leak of 'edid'

v16: Fix compile error
- Fix compiling error of incompitible interface of ".mode_valid()"

v15: Fix comments from Sam and Hsin-Yi Wang
- Remove connector
- Allocate memory for edid at ".get_edid()"

v14: Fix comments from Sam and Nicolas
- Check flags at drm_bridge_attach
- Use panel_bridge instead of drm_panel
- Fix not correct return value

v13: Fix comments from Launrent Pinchart and Rob Herring
- Picked up Rob's Reviewed-By
- Add .detect and .get_edid interface in bridge funcs.

v12: Fix comments from Hsin-Yi Wang
- Rebase the code on kernel 5.7, fix DRM interface not match issue.

v11: Fix comments from Rob Herring
- Update commit message.
- Remove unused label.

v10: Fix comments from Rob Herring, Daniel.
- Fix dt_binding_check warning.
- Update description.

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 DT schema drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP

 .../bindings/display/bridge/analogix,anx7625.yaml  |   95 +
 drivers/gpu/drm/bridge/analogix/Kconfig            |    9 +
 drivers/gpu/drm/bridge/analogix/Makefile           |    1 +
 drivers/gpu/drm/bridge/analogix/anx7625.c          | 1850 ++++++++++++++++++++
 drivers/gpu/drm/bridge/analogix/anx7625.h          |  390 +++++
 5 files changed, 2345 insertions(+)
 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

anx7625: MIPI to DP transmitter DT schema

---
 .../bindings/display/bridge/analogix,anx7625.yaml  | 95 ++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml

new file mode 100644
index 0000000..60585a4
@@ -0,0 +1,95 @@
+# 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:
+  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:
+  - compatible
+  - reg
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        encoder@58 {
+            compatible = "analogix,anx7625";
+            reg = <0x58>;
+            enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
+            reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
+
+            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

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.

---
 drivers/gpu/drm/bridge/analogix/Kconfig   |    9 +
 drivers/gpu/drm/bridge/analogix/Makefile  |    1 +
 drivers/gpu/drm/bridge/analogix/anx7625.c | 1850 +++++++++++++++++++++++++++++
 drivers/gpu/drm/bridge/analogix/anx7625.h |  390 ++++++
 4 files changed, 2250 insertions(+)
 create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
 create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h

index e1fa7d8..024ea2a 100644
@@ -25,3 +25,12 @@ config DRM_ANALOGIX_ANX78XX
 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 97669b3..44da392 100644
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
 obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
 obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
 obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o

2.7.4

Hi all, would you please help to review my latest patch v17, thanks very much!

Best Regards,
Xin

Hi Xin Ji

Thanks for all the iterations on this series. Driver looks good and I have applied it to drm-misc-next.

Expect it to appear in -next in a few weeks.

Sam
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