linux-kernel - [PATCH 4.9 31/61] ARM: dts: imx: Correct B850v3 clock assignment

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Date:   Mon,  1 Jun 2020 19:53:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Martyn Welch <martyn.welch@...labora.co.uk>,
        Romain Perier <romain.perier@...labora.com>,
        Fabio Estevam <fabio.estevam@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 31/61] ARM: dts: imx: Correct B850v3 clock assignment

From: Martyn Welch <martyn.welch@...labora.co.uk>

[ Upstream commit 1d0c7bb20c083a6e810d2142545b5606f8131080 ]

The IPU that drives HDMI must have its pre_sel set to pll2_pfd_396m
to avoid stepping on the LVDS output's toes, as the PLL can't be clocked
to the pixel clock and to the LVDS serial clock (3.5*pixel clock) at the
same time.

As we are using ipu1_di0 and ipu2_di0, ensure both are switched to
to pll2_pfd2_396m to avoid issues. The LDB driver will switch the
required IPU to ldb_di1 when it uses it to drive LVDS.

Signed-off-by: Martyn Welch <martyn.welch@...labora.co.uk>
Signed-off-by: Romain Perier <romain.perier@...labora.com>
Reviewed-by: Fabio Estevam <fabio.estevam@....com>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/imx6q-b850v3.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6q-b850v3.dts b/arch/arm/boot/dts/imx6q-b850v3.dts
index 167f7446722a..e5e9a16155d9 100644
--- a/arch/arm/boot/dts/imx6q-b850v3.dts
+++ b/arch/arm/boot/dts/imx6q-b850v3.dts
@@ -57,7 +57,7 @@
 	assigned-clocks = <&clks IMX6QDL_CLK_LDB_DI0_SEL>,
 			  <&clks IMX6QDL_CLK_LDB_DI1_SEL>,
 			  <&clks IMX6QDL_CLK_IPU1_DI0_PRE_SEL>,
-			  <&clks IMX6QDL_CLK_IPU1_DI1_PRE_SEL>;
+			  <&clks IMX6QDL_CLK_IPU2_DI0_PRE_SEL>;
 	assigned-clock-parents = <&clks IMX6QDL_CLK_PLL5_VIDEO_DIV>,
 				 <&clks IMX6QDL_CLK_PLL5_VIDEO_DIV>,
 				 <&clks IMX6QDL_CLK_PLL2_PFD2_396M>,
-- 
2.25.1