drivers: video: Add support for STM32 DCMI

Add Kconfig, DCMI driver, Yaml, and CMakeLists files

Signed-off-by: Charles Dias <charlesdias.cd@outlook.com>

dts/bindings/video/st,stm32-dcmi.yaml

@@ -0,0 +1,123 @@
+#
+# Copyright (c) 2024 Charles Dias <charlesdias.cd@outlook.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+description: |
+    STMicroelectronics STM32 Digital Camera Memory Interface (DCMI).
+    Example of node configuration at board level:
+
+    &dcmi {
+      status = "okay";
+      sensor = <&ov2640>;
+      pinctrl-0 = <&dcmi_hsync_pa4 &dcmi_pixclk_pa6 &dcmi_vsync_pb7
+                  &dcmi_d0_pc6 &dcmi_d1_pc7 &dcmi_d2_pe0 &dcmi_d3_pe1
+                  &dcmi_d4_pe4 &dcmi_d5_pd3 &dcmi_d6_pe5 &dcmi_d7_pe6>;
+      pinctrl-names = "default";
+      bus-width = <8>;
+      hsync-active = <0>;
+      vsync-active = <0>;
+      pixelclk-active = <1>;
+      capture-rate = <1>;
+      dmas = <&dma1 0 75 (STM32_DMA_PERIPH_TO_MEMORY | STM32_DMA_PERIPH_NO_INC |
+              STM32_DMA_MEM_INC | STM32_DMA_PERIPH_8BITS | STM32_DMA_MEM_32BITS |
+              STM32_DMA_PRIORITY_HIGH) STM32_DMA_FIFO_1_4>;
+
+      port {
+        dcmi_ep_in: endpoint {
+          remote-endpoint = <&ov2640_ep_out>;
+        };
+      };
+    };
+
+compatible: "st,stm32-dcmi"
+
+include: [base.yaml, pinctrl-device.yaml]
+
+properties:
+  interrupts:
+    required: true
+
+  sensor:
+    required: true
+    type: phandle
+    description: phandle of connected sensor device
+
+  bus-width:
+    type: int
+    required: true
+    enum:
+      - 8
+      - 10
+      - 12
+      - 14
+    default: 8
+    description: |
+      Number of data lines actively used, valid for the parallel busses.
+
+  hsync-active:
+    type: int
+    required: true
+    enum:
+      - 0
+      - 1
+    description: |
+      Polarity of horizontal synchronization (DCMI_HSYNC_Polarity).
+      0 Horizontal synchronization active Low.
+      1 Horizontal synchronization active High.
+
+      For example, if DCMI_HSYNC_Polarity is programmed active high:
+      When HSYNC is low, the data is valid.
+      When HSYNC is high, the data is not valid (horizontal blanking).
+
+  vsync-active:
+    type: int
+    required: true
+    enum:
+      - 0
+      - 1
+    description: |
+      Polarity of vertical synchronization (DCMI_VSYNC_Polarity).
+      0 Vertical synchronization active Low.
+      1 Vertical synchronization active High.
+
+      For example, if DCMI_VSYNC_Polarity is programmed active high:
+      When VSYNC is low, the data is valid.
+      When VSYNC is high, the data is not valid (vertical blanking).
+
+  pixelclk-active:
+    type: int
+    required: true
+    enum:
+      - 0
+      - 1
+    description: |
+      Polarity of pixel clock (DCMI_PIXCK_Polarity).
+      0 Pixel clock active on Falling edge.
+      1 Pixel clock active on Rising edge.
+
+  capture-rate:
+    type: int
+    enum:
+      - 1
+      - 2
+      - 4
+    default: 1
+    description: |
+      The DCMI can capture all frames or alternate frames. If it is not specified,
+      the default is all frames.
+      1 Capture all frames.
+      2 Capture alternate frames.
+      4 Capture one frame every 4 frames.
+
+  dmas:
+    required: true
+    description: |
+      phandle of DMA controller. The DMA controller should be compatible with
+      DMA channel specifier. Specifies a phandle reference to the dma controller,
+      the channel number, the slot number, channel configuration and finally features.
+
+      dmas = <&dma1 0 75 (STM32_DMA_PERIPH_TO_MEMORY | STM32_DMA_PERIPH_NO_INC |
+              STM32_DMA_MEM_INC | STM32_DMA_PERIPH_8BITS | STM32_DMA_MEM_32BITS |
+              STM32_DMA_PRIORITY_HIGH) STM32_DMA_FIFO_1_4>;