[PATCH v3] arm64: dts: imx8mp: Align both CSI2 pixel clock

[PATCH v3] arm64: dts: imx8mp: Align both CSI2 pixel clock

[Marek Vasut]

Configure both CSI2 clock-frequency and assigned-clock-rates
the same way. There does not seem to be any reason for keeping
the two CSI2 pixel clock set to different frequencies.

This also reduces first CSI2 clock from overdrive mode
frequency which is 500 MHz down below the regular mode
frequency of 400 MHz.

Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Paul Elder <paul.elder@ideasonboard.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: imx@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org
---
V2: Align both clock to 266 MHz and update commit message
V3: - Fix up clock-frequency to 266 MHz as well, update commit message
    - Add RB from Peng and Alexander, but maybe those need to be updated?
---
 arch/arm64/boot/dts/freescale/imx8mp.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 1bb96e96639f2..b92abb5a5c536 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -1657,7 +1657,7 @@ mipi_csi_0: csi@32e40000 {
 				compatible = "fsl,imx8mp-mipi-csi2", "fsl,imx8mm-mipi-csi2";
 				reg = <0x32e40000 0x10000>;
 				interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
-				clock-frequency = <500000000>;
+				clock-frequency = <266000000>;
 				clocks = <&clk IMX8MP_CLK_MEDIA_APB_ROOT>,
 					 <&clk IMX8MP_CLK_MEDIA_CAM1_PIX_ROOT>,
 					 <&clk IMX8MP_CLK_MEDIA_MIPI_PHY1_REF_ROOT>,
@@ -1667,7 +1667,7 @@ mipi_csi_0: csi@32e40000 {
 						  <&clk IMX8MP_CLK_MEDIA_MIPI_PHY1_REF>;
 				assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>,
 							 <&clk IMX8MP_CLK_24M>;
-				assigned-clock-rates = <500000000>;
+				assigned-clock-rates = <266000000>;
 				power-domains = <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_CSI2_1>;
 				status = "disabled";
 
-- 
2.43.0

Re: [PATCH v3] arm64: dts: imx8mp: Align both CSI2 pixel clock

[Ahmad Fatoum]

On 17.04.24 13:42, Marek Vasut wrote:
> Configure both CSI2 clock-frequency and assigned-clock-rates
> the same way. There does not seem to be any reason for keeping
> the two CSI2 pixel clock set to different frequencies.
> 
> This also reduces first CSI2 clock from overdrive mode
> frequency which is 500 MHz down below the regular mode
> frequency of 400 MHz.
> 
> Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> Reviewed-by: Peng Fan <peng.fan@nxp.com>

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

Thanks,
Ahmad

> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
> Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Paul Elder <paul.elder@ideasonboard.com>
> Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: imx@lists.linux.dev
> Cc: linux-arm-kernel@lists.infradead.org
> ---
> V2: Align both clock to 266 MHz and update commit message
> V3: - Fix up clock-frequency to 266 MHz as well, update commit message
>     - Add RB from Peng and Alexander, but maybe those need to be updated?
> ---
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index 1bb96e96639f2..b92abb5a5c536 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -1657,7 +1657,7 @@ mipi_csi_0: csi@32e40000 {
>  				compatible = "fsl,imx8mp-mipi-csi2", "fsl,imx8mm-mipi-csi2";
>  				reg = <0x32e40000 0x10000>;
>  				interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
> -				clock-frequency = <500000000>;
> +				clock-frequency = <266000000>;
>  				clocks = <&clk IMX8MP_CLK_MEDIA_APB_ROOT>,
>  					 <&clk IMX8MP_CLK_MEDIA_CAM1_PIX_ROOT>,
>  					 <&clk IMX8MP_CLK_MEDIA_MIPI_PHY1_REF_ROOT>,
> @@ -1667,7 +1667,7 @@ mipi_csi_0: csi@32e40000 {
>  						  <&clk IMX8MP_CLK_MEDIA_MIPI_PHY1_REF>;
>  				assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>,
>  							 <&clk IMX8MP_CLK_24M>;
> -				assigned-clock-rates = <500000000>;
> +				assigned-clock-rates = <266000000>;
>  				power-domains = <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_CSI2_1>;
>  				status = "disabled";
>  

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH v3] arm64: dts: imx8mp: Align both CSI2 pixel clock

[Shawn Guo]

On Wed, Apr 17, 2024 at 01:42:06PM +0200, Marek Vasut wrote:
> Configure both CSI2 clock-frequency and assigned-clock-rates
> the same way. There does not seem to be any reason for keeping
> the two CSI2 pixel clock set to different frequencies.
> 
> This also reduces first CSI2 clock from overdrive mode
> frequency which is 500 MHz down below the regular mode
> frequency of 400 MHz.
> 
> Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> Reviewed-by: Peng Fan <peng.fan@nxp.com>
> Signed-off-by: Marek Vasut <marex@denx.de>

Applied, thanks!