[PATCH 0/4] Enable stm32mp1 camera support

[PATCH 0/4] Enable stm32mp1 camera support

[Hugues Fruchet]

This patchset serie enables camera of stm32mp157c evaluation board.
To do so, both stm32mp157c DCMI camera interface driver and OV5640 camera
module driver are enabled in devicetree.

DCMI camera interface driver is enabled by default in multi_v7 configuration
but OV5640 driver remains to be selected at kernel configuration time.

This patchset depends on STMicroelectronics Multi-Function eXpander
(STMFX) support [1].

[1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1944108.html

Hugues Fruchet (4):
  ARM: dts: stm32: add 2v8 fixed regulator for stm32mp157c-ed1 board
  ARM: dts: stm32: add DCMI camera interface support on stm32mp157c
  ARM: dts: stm32: add DCMI pins to stm32mp157c
  ARM: dts: stm32: enable OV5640 camera on stm32mp157c-ev1 board

 arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 41 ++++++++++++++++++++++
 arch/arm/boot/dts/stm32mp157c-ed1.dts     |  8 +++++
 arch/arm/boot/dts/stm32mp157c-ev1.dts     | 56 +++++++++++++++++++++++++++++++
 arch/arm/boot/dts/stm32mp157c.dtsi        | 12 +++++++
 4 files changed, 117 insertions(+)

-- 
2.7.4

[PATCH 1/4] ARM: dts: stm32: add 2v8 fixed regulator for stm32mp157c-ed1 board

[Hugues Fruchet]

Add 2v8 fixed regulator and enable it.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
 arch/arm/boot/dts/stm32mp157c-ed1.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
index 10dc7c0..4b5bcfd 100644
--- a/arch/arm/boot/dts/stm32mp157c-ed1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
@@ -57,6 +57,14 @@
 		regulator-boot-on;
 	};
 
+	v2v8: ldo2 {
+		compatible = "regulator-fixed";
+		regulator-name = "v2v8";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		regulator-always-on;
+	};
+
 	sd_switch: regulator-sd_switch {
 		compatible = "regulator-gpio";
 		regulator-name = "sd_switch";
-- 
2.7.4

[PATCH 2/4] ARM: dts: stm32: add DCMI camera interface support on stm32mp157c

[Hugues Fruchet]

Add DCMI camera interface support on stm32mp157c.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
 arch/arm/boot/dts/stm32mp157c.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157c.dtsi b/arch/arm/boot/dts/stm32mp157c.dtsi
index 10bf338..1ff331c 100644
--- a/arch/arm/boot/dts/stm32mp157c.dtsi
+++ b/arch/arm/boot/dts/stm32mp157c.dtsi
@@ -886,6 +886,18 @@
 			status = "disabled";
 		};
 
+		dcmi: dcmi@4c006000 {
+			compatible = "st,stm32-dcmi";
+			reg = <0x4c006000 0x400>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			resets = <&rcc CAMITF_R>;
+			clocks = <&rcc DCMI>;
+			clock-names = "mclk";
+			dmas = <&dmamux1 75 0x400 0x0d>;
+			dma-names = "tx";
+			status = "disabled";
+		};
+
 		rcc: rcc@50000000 {
 			compatible = "st,stm32mp1-rcc", "syscon";
 			reg = <0x50000000 0x1000>;
-- 
2.7.4

[PATCH 3/4] ARM: dts: stm32: add DCMI pins to stm32mp157c

[Hugues Fruchet]

Add DCMI pins to stm32mp157c.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
 arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 41 +++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
index 6b3a9c6..b299afc 100644
--- a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
@@ -414,6 +414,47 @@
 					bias-disable;
 				};
 			};
+
+			dcmi_pins_a: dcmi-0 {
+				pins {
+					pinmux = <STM32_PINMUX('H', 8,  AF13)>,/* DCMI_HSYNC */
+						 <STM32_PINMUX('B', 7,  AF13)>,/* DCMI_VSYNC */
+						 <STM32_PINMUX('A', 6,  AF13)>,/* DCMI_PIXCLK */
+						 <STM32_PINMUX('H', 9,  AF13)>,/* DCMI_D0 */
+						 <STM32_PINMUX('H', 10, AF13)>,/* DCMI_D1 */
+						 <STM32_PINMUX('H', 11, AF13)>,/* DCMI_D2 */
+						 <STM32_PINMUX('H', 12, AF13)>,/* DCMI_D3 */
+						 <STM32_PINMUX('H', 14, AF13)>,/* DCMI_D4 */
+						 <STM32_PINMUX('I', 4,  AF13)>,/* DCMI_D5 */
+						 <STM32_PINMUX('B', 8,  AF13)>,/* DCMI_D6 */
+						 <STM32_PINMUX('E', 6,  AF13)>,/* DCMI_D7 */
+						 <STM32_PINMUX('I', 1,  AF13)>,/* DCMI_D8 */
+						 <STM32_PINMUX('H', 7,  AF13)>,/* DCMI_D9 */
+						 <STM32_PINMUX('I', 3,  AF13)>,/* DCMI_D10 */
+						 <STM32_PINMUX('H', 15, AF13)>;/* DCMI_D11 */
+					bias-disable;
+				};
+			};
+
+			dcmi_sleep_pins_a: dcmi-sleep-0 {
+				pins {
+					pinmux = <STM32_PINMUX('H', 8,  ANALOG)>,/* DCMI_HSYNC */
+						 <STM32_PINMUX('B', 7,  ANALOG)>,/* DCMI_VSYNC */
+						 <STM32_PINMUX('A', 6,  ANALOG)>,/* DCMI_PIXCLK */
+						 <STM32_PINMUX('H', 9,  ANALOG)>,/* DCMI_D0 */
+						 <STM32_PINMUX('H', 10, ANALOG)>,/* DCMI_D1 */
+						 <STM32_PINMUX('H', 11, ANALOG)>,/* DCMI_D2 */
+						 <STM32_PINMUX('H', 12, ANALOG)>,/* DCMI_D3 */
+						 <STM32_PINMUX('H', 14, ANALOG)>,/* DCMI_D4 */
+						 <STM32_PINMUX('I', 4,  ANALOG)>,/* DCMI_D5 */
+						 <STM32_PINMUX('B', 8,  ANALOG)>,/* DCMI_D6 */
+						 <STM32_PINMUX('E', 6,  ANALOG)>,/* DCMI_D7 */
+						 <STM32_PINMUX('I', 1,  ANALOG)>,/* DCMI_D8 */
+						 <STM32_PINMUX('H', 7,  ANALOG)>,/* DCMI_D9 */
+						 <STM32_PINMUX('I', 3,  ANALOG)>,/* DCMI_D10 */
+						 <STM32_PINMUX('H', 15, ANALOG)>;/* DCMI_D11 */
+				};
+			};
 		};
 
 		pinctrl_z: pin-controller-z@54004000 {
-- 
2.7.4

[PATCH 4/4] ARM: dts: stm32: enable OV5640 camera on stm32mp157c-ev1 board

[Hugues Fruchet]

Enable OV5640 camera sensor driver of MB1379A extension
board connected on CN7 connector of stm32mp157c-ev1 board:
bus-width is set to 8, data-shift is set to 2 (lines 9:2 are used),
hsync-active is set to 0 for horizontal synchro line active low,
vsync-active is set to 0 for vertical synchro line active low and
pclk-sample is set to 1 for pixel clock polarity sampling data
on rising edge of the pixel clock signal.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
 arch/arm/boot/dts/stm32mp157c-ev1.dts | 56 +++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157c-ev1.dts b/arch/arm/boot/dts/stm32mp157c-ev1.dts
index 009f9d6..8fb1688 100644
--- a/arch/arm/boot/dts/stm32mp157c-ev1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ev1.dts
@@ -65,6 +65,14 @@
 		default-on;
 		status = "okay";
 	};
+
+	clocks {
+		clk_ext_camera: clk-ext-camera {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <24000000>;
+		};
+	};
 };
 
 &cec {
@@ -73,6 +81,23 @@
 	status = "okay";
 };
 
+&dcmi {
+	status = "okay";
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&dcmi_pins_a>;
+	pinctrl-1 = <&dcmi_sleep_pins_a>;
+
+	port {
+		dcmi_0: endpoint {
+			remote-endpoint = <&ov5640_0>;
+			bus-width = <8>;
+			hsync-active = <0>;
+			vsync-active = <0>;
+			pclk-sample = <1>;
+		};
+	};
+};
+
 &dsi {
 	#address-cells = <1>;
 	#size-cells = <0>;
@@ -138,6 +163,31 @@
 	i2c-scl-falling-time-ns = <20>;
 	status = "okay";
 
+	ov5640: camera@3c {
+		compatible = "ovti,ov5640";
+		pinctrl-names = "default";
+		pinctrl-0 = <&ov5640_pins>;
+		reg = <0x3c>;
+		clocks = <&clk_ext_camera>;
+		clock-names = "xclk";
+		DOVDD-supply = <&v2v8>;
+		powerdown-gpios = <&stmfx_pinctrl 18 GPIO_ACTIVE_HIGH>;
+		reset-gpios = <&stmfx_pinctrl 19 GPIO_ACTIVE_LOW>;
+		rotation = <180>;
+		status = "okay";
+
+		port {
+			ov5640_0: endpoint {
+				remote-endpoint = <&dcmi_0>;
+				bus-width = <8>;
+				data-shift = <2>; /* lines 9:2 are used */
+				hsync-active = <0>;
+				vsync-active = <0>;
+				pclk-sample = <1>;
+			};
+		};
+	};
+
 	stmfx: stmfx@42 {
 		compatible = "st,stmfx-0300";
 		reg = <0x42>;
@@ -157,6 +207,12 @@
 				drive-push-pull;
 				bias-pull-down;
 			};
+
+			ov5640_pins: camera {
+				pins = "agpio2", "agpio3"; /* stmfx pins 18 & 19 */
+				drive-push-pull;
+				output-low;
+			};
 		};
 	};
 };
-- 
2.7.4

Re: [PATCH 0/4] Enable stm32mp1 camera support

[Alexandre Torgue]

Dear Hugues,

On 2/28/19 3:25 PM, Hugues Fruchet wrote:
> This patchset serie enables camera of stm32mp157c evaluation board.
> To do so, both stm32mp157c DCMI camera interface driver and OV5640 camera
> module driver are enabled in devicetree.
> 
> DCMI camera interface driver is enabled by default in multi_v7 configuration
> but OV5640 driver remains to be selected at kernel configuration time.
> 
> This patchset depends on STMicroelectronics Multi-Function eXpander
> (STMFX) support [1].
> 
> [1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1944108.html
> 
> Hugues Fruchet (4):
>    ARM: dts: stm32: add 2v8 fixed regulator for stm32mp157c-ed1 board
>    ARM: dts: stm32: add DCMI camera interface support on stm32mp157c
>    ARM: dts: stm32: add DCMI pins to stm32mp157c
>    ARM: dts: stm32: enable OV5640 camera on stm32mp157c-ev1 board
> 
>   arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 41 ++++++++++++++++++++++
>   arch/arm/boot/dts/stm32mp157c-ed1.dts     |  8 +++++
>   arch/arm/boot/dts/stm32mp157c-ev1.dts     | 56 +++++++++++++++++++++++++++++++
>   arch/arm/boot/dts/stm32mp157c.dtsi        | 12 +++++++
>   4 files changed, 117 insertions(+)
> 

Patch 2 to 4 applied on stm32-next. Patch 1 is no longer needed as 
regulators are now provided by PMIC.

thanks
Alex