[PATCH v2] arm64: dts: imx8mp: Align both CSI2 pixel clock

Ahmad Fatoum a.fatoum at pengutronix.de
Wed Apr 17 03:17:05 PDT 2024


On 17.04.24 12:14, Ahmad Fatoum wrote:
> On 16.04.24 16:19, Marek Vasut wrote:
>> Configure both CSI2 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.
>>
>> Signed-off-by: Marek Vasut <marex at denx.de>
> 
> Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

I see now that the node has a clock-frequency = <500000000>; still.
This should be lowered too, shouldn't it?

Cheers,
Ahmad

> 
>> ---
>> Cc: Conor Dooley <conor+dt at kernel.org>
>> Cc: Fabio Estevam <festevam at gmail.com>
>> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
>> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>> Cc: Paul Elder <paul.elder at ideasonboard.com>
>> Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
>> Cc: Rob Herring <robh at kernel.org>
>> Cc: Sascha Hauer <s.hauer at pengutronix.de>
>> Cc: Shawn Guo <shawnguo at kernel.org>
>> Cc: devicetree at vger.kernel.org
>> Cc: imx at lists.linux.dev
>> Cc: linux-arm-kernel at lists.infradead.org
>> ---
>> V2: Align both clock to 266 MHz and update commit message
>> ---
>>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
>> index 1bb96e96639f2..7883f5c056f4e 100644
>> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
>> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
>> @@ -1667,7 +1667,7 @@ mipi_csi_0: csi at 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";
>>  
> 

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