[PATCH] arm64: dts: imx8mp: Do not reconfigure Audio PLL2 on DH i.MX8M Plus DHCOM SoM

[PATCH] arm64: dts: imx8mp: Do not reconfigure Audio PLL2 on DH i.MX8M Plus DHCOM SoM

[Marek Vasut]

The DH i.MX8M Plus DHCOM SoM uses Audio PLL2 to supply clock to CLKOUT2
output. Those clock are used to supply on-SoM TC9595 DSI-to-(e)DP bridge
with RefClk and must not be reconfigured, otherwise the bridge cannot
work correctly. Stop reconfiguring Audio PLL2 on this SoM.

Fixes: f560da940e32 ("arm64: dts: imx8mp: Initialize audio PLLs from audiomix subsystem")
Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Daniel Baluta <daniel.baluta@nxp.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
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: Shengjiu Wang <shengjiu.wang@nxp.com>
Cc: devicetree@vger.kernel.org
Cc: imx@lists.linux.dev
Cc: kernel@dh-electronics.com
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
index 5444be6f0ec2d..848df53c48685 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
@@ -78,6 +78,11 @@ &A53_3 {
 	cpu-supply = <&buck2>;
 };
 
+&audio_blk_ctrl {
+	assigned-clocks = <&clk IMX8MP_AUDIO_PLL1>;
+	assigned-clock-rates = <393216000>;
+};
+
 &ecspi1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_ecspi1>;
-- 
2.43.0

Re: [PATCH] arm64: dts: imx8mp: Do not reconfigure Audio PLL2 on DH i.MX8M Plus DHCOM SoM

[Shawn Guo]

On Tue, Jun 25, 2024 at 02:11:09PM +0200, Marek Vasut wrote:
> The DH i.MX8M Plus DHCOM SoM uses Audio PLL2 to supply clock to CLKOUT2
> output. Those clock are used to supply on-SoM TC9595 DSI-to-(e)DP bridge
> with RefClk and must not be reconfigured, otherwise the bridge cannot
> work correctly. Stop reconfiguring Audio PLL2 on this SoM.
> 
> Fixes: f560da940e32 ("arm64: dts: imx8mp: Initialize audio PLLs from audiomix subsystem")
> Signed-off-by: Marek Vasut <marex@denx.de>

Applied, thanks!