[v2] arm64: dts: imx8mq: Set the correct gpu_ahb clock frequency

[PATCH v2] arm64: dts: imx8mq: Set the correct gpu_ahb clock frequency

Posted by Sebastian Krzyszkowiak 1 week, 5 days ago

According to i.MX 8M Quad Reference Manual, GPU_AHB_CLK_ROOT's maximum
frequency is 400MHz.

Fixes: 45d2c84eb3a2 ("arm64: dts: imx8mq: add GPU node")
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
---
Changes in v2:
- added Fixes trailer as suggested by Fabio Estevam
- Link to v1: https://lore.kernel.org/r/20260124-imx8mq-gpu-ahb-clock-v1-1-11c2e7c857b7@puri.sm
---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 607962f807be..6a25e219832c 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1632,7 +1632,7 @@ gpu: gpu@38000000 {
 			                         <&clk IMX8MQ_GPU_PLL_OUT>,
 			                         <&clk IMX8MQ_GPU_PLL>;
 			assigned-clock-rates = <800000000>, <800000000>,
-			                       <800000000>, <800000000>, <0>;
+			                       <800000000>, <400000000>, <0>;
 			power-domains = <&pgc_gpu>;
 		};
 

---
base-commit: 24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7
change-id: 20260105-imx8mq-gpu-ahb-clock-139ba9ca9a6c

Best regards,
-- 
Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>

Re: [PATCH v2] arm64: dts: imx8mq: Set the correct gpu_ahb clock frequency

Posted by Peng Fan 1 week, 5 days ago

On Wed, Jan 28, 2026 at 12:28:28AM +0100, Sebastian Krzyszkowiak wrote:
>According to i.MX 8M Quad Reference Manual, GPU_AHB_CLK_ROOT's maximum
>frequency is 400MHz.
>
>Fixes: 45d2c84eb3a2 ("arm64: dts: imx8mq: add GPU node")
>Reviewed-by: Frank Li <Frank.Li@nxp.com>
>Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>

Reviewed-by: Peng Fan <peng.fan@nxp.com>

Re: [PATCH v2] arm64: dts: imx8mq: Set the correct gpu_ahb clock frequency

Posted by Fabio Estevam 1 week, 5 days ago

Hi Sebastian,

On Tue, Jan 27, 2026 at 8:28 PM Sebastian Krzyszkowiak
<sebastian.krzyszkowiak@puri.sm> wrote:
>
> According to i.MX 8M Quad Reference Manual, GPU_AHB_CLK_ROOT's maximum
> frequency is 400MHz.
>
> Fixes: 45d2c84eb3a2 ("arm64: dts: imx8mq: add GPU node")
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
> ---
> Changes in v2:
> - added Fixes trailer as suggested by Fabio Estevam
> - Link to v1: https://lore.kernel.org/r/20260124-imx8mq-gpu-ahb-clock-v1-1-11c2e7c857b7@puri.sm

Reviewed-by: Fabio Estevam <festevam@gmail.com>

Thanks