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[PATCH v2 3/6] arm64: dts: exynos7870: add DSI support

Kaustabh Chakraborty posted 6 patches 7 months, 2 weeks ago
There is a newer version of this series
[PATCH v2 3/6] arm64: dts: exynos7870: add DSI support
Posted by Kaustabh Chakraborty 7 months, 2 weeks ago 
Add devicetree nodes for MIPI PHYs, Samsung's DECON and DSIM blocks, and
DECON IOMMU devicetree nodes. Enables SoC support for hardware to be
able to drive a MIPI DSI display.

Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
---
 arch/arm64/boot/dts/exynos/exynos7870.dtsi | 90 ++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870.dtsi b/arch/arm64/boot/dts/exynos/exynos7870.dtsi
index 5cba8c9bb403405b2d9721ab8cf9d61e3d5faf95..5f143216c758d9994bd508dc60fbe30f4cd9ee5f 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7870.dtsi
@@ -178,6 +178,14 @@ pmu_system_controller: system-controller@10480000 {
 				     "samsung,exynos7-pmu", "syscon";
 			reg = <0x10480000 0x10000>;
 
+			mipi_phy: mipi-phy {
+				compatible = "samsung,exynos7870-mipi-video-phy";
+				#phy-cells = <1>;
+
+				samsung,cam0-sysreg = <&syscon_cam0>;
+				samsung,disp-sysreg = <&syscon_disp>;
+			};
+
 			reboot-mode {
 				compatible = "syscon-reboot-mode";
 				offset = <0x080c>;
@@ -674,6 +682,83 @@ cmu_isp: clock-controller@144d0000 {
 				 <&cmu_mif CLK_GOUT_MIF_CMU_ISP_VRA>;
 		};
 
+		syscon_cam0: syscon@144f1040 {
+			compatible = "samsung,exynos7870-cam0-sysreg", "syscon";
+			reg = <0x144f1040 0x04>;
+		};
+
+		dsi: dsi@14800000 {
+			compatible = "samsung,exynos7870-mipi-dsi";
+			reg = <0x14800000 0x100>;
+			interrupts = <GIC_SPI 207 IRQ_TYPE_LEVEL_HIGH>;
+
+			clock-names = "bus", "pll", "byte", "esc";
+			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_BUS_DISP>,
+				 <&cmu_dispaud CLK_GOUT_DISPAUD_APB_DISP>,
+				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_MIPIPHY_TXBYTECLKHS_USER>,
+				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_MIPIPHY_RXCLKESC0_USER>;
+
+			phy-names = "dsim";
+			phys = <&mipi_phy 1>;
+
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					dsi_to_decon: endpoint {
+						remote-endpoint = <&decon_to_dsi>;
+					};
+				};
+			};
+		};
+
+		decon: decon@14830000 {
+			compatible = "samsung,exynos7870-decon";
+			reg = <0x14830000 0x8000>;
+			interrupt-names = "fifo", "vsync", "lcd_sys";
+			interrupts = <GIC_SPI 201 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 202 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 203 IRQ_TYPE_LEVEL_HIGH>;
+
+			clock-names = "pclk_decon0", "aclk_decon0",
+				      "decon0_eclk", "decon0_vclk";
+			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_PLL>,
+				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_BUS_USER>,
+				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_DECON_ECLK>,
+				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_DECON_VCLK>;
+
+			iommus = <&sysmmu_decon>;
+
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					decon_to_dsi: endpoint {
+						remote-endpoint = <&dsi_to_decon>;
+					};
+				};
+			};
+		};
+
+		sysmmu_decon: sysmmu@14860000 {
+			compatible = "samsung,exynos-sysmmu";
+			reg = <0x14860000 0x1000>;
+			interrupts = <GIC_SPI 193 IRQ_TYPE_LEVEL_HIGH>;
+			#iommu-cells = <0>;
+
+			clock-names = "sysmmu";
+			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_BUS_USER>;
+		};
+
 		pinctrl_dispaud: pinctrl@148c0000 {
 			compatible = "samsung,exynos7870-pinctrl";
 			reg = <0x148c0000 0x1000>;
@@ -691,6 +776,11 @@ cmu_dispaud: clock-controller@148d0000 {
 				 <&cmu_mif CLK_GOUT_MIF_CMU_DISPAUD_DECON_ECLK>,
 				 <&cmu_mif CLK_GOUT_MIF_CMU_DISPAUD_DECON_VCLK>;
 		};
+
+		syscon_disp: syscon@148f100c {
+			compatible = "samsung,exynos7870-disp-sysreg", "syscon";
+			reg = <0x148f100c 0x04>;
+		};
 	};
 
 	timer {

-- 
2.49.0
Re: [PATCH v2 3/6] arm64: dts: exynos7870: add DSI support
Posted by Krzysztof Kozlowski 6 months ago 
On 26/06/2025 22:13, Kaustabh Chakraborty wrote:
>  			reboot-mode {
>  				compatible = "syscon-reboot-mode";
>  				offset = <0x080c>;
> @@ -674,6 +682,83 @@ cmu_isp: clock-controller@144d0000 {
>  				 <&cmu_mif CLK_GOUT_MIF_CMU_ISP_VRA>;
>  		};
>  
> +		syscon_cam0: syscon@144f1040 {
> +			compatible = "samsung,exynos7870-cam0-sysreg", "syscon";
> +			reg = <0x144f1040 0x04>;
> +		};
> +
> +		dsi: dsi@14800000 {
> +			compatible = "samsung,exynos7870-mipi-dsi";
> +			reg = <0x14800000 0x100>;
> +			interrupts = <GIC_SPI 207 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			clock-names = "bus", "pll", "byte", "esc";
> +			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_BUS_DISP>,
> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_APB_DISP>,
> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_MIPIPHY_TXBYTECLKHS_USER>,
> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_MIPIPHY_RXCLKESC0_USER>;

First clocks, then clock-names, please. Same for phys here and in all
other place.

> +
> +			phy-names = "dsim";
> +			phys = <&mipi_phy 1>;
> +
> +			status = "disabled";
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				port@0 {
> +					reg = <0>;
> +
> +					dsi_to_decon: endpoint {
> +						remote-endpoint = <&decon_to_dsi>;
> +					};
> +				};
> +			};
> +		};
> +
> +		decon: decon@14830000 {

node name: display-controller@

> +			compatible = "samsung,exynos7870-decon";
> +			reg = <0x14830000 0x8000>;
> +			interrupt-names = "fifo", "vsync", "lcd_sys";
> +			interrupts = <GIC_SPI 201 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 202 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 203 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			clock-names = "pclk_decon0", "aclk_decon0",
> +				      "decon0_eclk", "decon0_vclk";
> +			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_PLL>,
> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_BUS_USER>,
> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_DECON_ECLK>,
> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_DECON_VCLK>;
> +
> +			iommus = <&sysmmu_decon>;
> +
> +			status = "disabled";
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				port@0 {
> +					reg = <0>;
> +					decon_to_dsi: endpoint {
> +						remote-endpoint = <&dsi_to_decon>;
> +					};
> +				};
> +			};
> +		};
> +
> +		sysmmu_decon: sysmmu@14860000 {

iommu@

> +			compatible = "samsung,exynos-sysmmu";
> +			reg = <0x14860000 0x1000>;
> +			interrupts = <GIC_SPI 193 IRQ_TYPE_LEVEL_HIGH>;
> +			#iommu-cells = <0>;
> +
> +			clock-names = "sysmmu";
> +			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_BUS_USER>;
> +		};



Best regards,
Krzysztof
Re: [PATCH v2 3/6] arm64: dts: exynos7870: add DSI support
Posted by Kaustabh Chakraborty 5 months, 3 weeks ago 
On 2025-08-13 07:56, Krzysztof Kozlowski wrote:
> On 26/06/2025 22:13, Kaustabh Chakraborty wrote:
>>  			reboot-mode {
>>  				compatible = "syscon-reboot-mode";
>>  				offset = <0x080c>;
>> @@ -674,6 +682,83 @@ cmu_isp: clock-controller@144d0000 {
>>  				 <&cmu_mif CLK_GOUT_MIF_CMU_ISP_VRA>;
>>  		};
>> 
>> +		syscon_cam0: syscon@144f1040 {
>> +			compatible = "samsung,exynos7870-cam0-sysreg", "syscon";
>> +			reg = <0x144f1040 0x04>;
>> +		};
>> +
>> +		dsi: dsi@14800000 {
>> +			compatible = "samsung,exynos7870-mipi-dsi";
>> +			reg = <0x14800000 0x100>;
>> +			interrupts = <GIC_SPI 207 IRQ_TYPE_LEVEL_HIGH>;
>> +
>> +			clock-names = "bus", "pll", "byte", "esc";
>> +			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_BUS_DISP>,
>> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_APB_DISP>,
>> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_MIPIPHY_TXBYTECLKHS_USER>,
>> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_MIPIPHY_RXCLKESC0_USER>;
> 
> First clocks, then clock-names, please. Same for phys here and in all
> other place.

x-names followed by x approach is followed by the entire dts.
I will apply your suggestion in the next rev, and will also send a
separate patch for the same in all other places.

> 
>> +
>> +			phy-names = "dsim";
>> +			phys = <&mipi_phy 1>;
>> +
>> +			status = "disabled";
>> +
>> +			ports {
>> +				#address-cells = <1>;
>> +				#size-cells = <0>;
>> +
>> +				port@0 {
>> +					reg = <0>;
>> +
>> +					dsi_to_decon: endpoint {
>> +						remote-endpoint = <&decon_to_dsi>;
>> +					};
>> +				};
>> +			};
>> +		};
>> +
>> +		decon: decon@14830000 {
> 
> node name: display-controller@

This was preemptively changed, thanks.

> 
>> +			compatible = "samsung,exynos7870-decon";
>> +			reg = <0x14830000 0x8000>;
>> +			interrupt-names = "fifo", "vsync", "lcd_sys";
>> +			interrupts = <GIC_SPI 201 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 202 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 203 IRQ_TYPE_LEVEL_HIGH>;
>> +
>> +			clock-names = "pclk_decon0", "aclk_decon0",
>> +				      "decon0_eclk", "decon0_vclk";
>> +			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_PLL>,
>> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_BUS_USER>,
>> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_DECON_ECLK>,
>> +				 <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_DECON_VCLK>;
>> +
>> +			iommus = <&sysmmu_decon>;
>> +
>> +			status = "disabled";
>> +
>> +			ports {
>> +				#address-cells = <1>;
>> +				#size-cells = <0>;
>> +
>> +				port@0 {
>> +					reg = <0>;
>> +					decon_to_dsi: endpoint {
>> +						remote-endpoint = <&dsi_to_decon>;
>> +					};
>> +				};
>> +			};
>> +		};
>> +
>> +		sysmmu_decon: sysmmu@14860000 {
> 
> iommu@

Also preemptively changed.

> 
>> +			compatible = "samsung,exynos-sysmmu";
>> +			reg = <0x14860000 0x1000>;
>> +			interrupts = <GIC_SPI 193 IRQ_TYPE_LEVEL_HIGH>;
>> +			#iommu-cells = <0>;
>> +
>> +			clock-names = "sysmmu";
>> +			clocks = <&cmu_dispaud CLK_GOUT_DISPAUD_MUX_BUS_USER>;
>> +		};
> 
> 
> 
> Best regards,
> Krzysztof

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