| Message ID | bc2da4ab8322d5e8a44018633e0220e08d70e72e.1610297714.git.agx@sigxcpu.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] arm64: dts: imx8mq: Add clock parents for mipi dphy | expand |
On Sun, Jan 10, 2021 at 05:55:51PM +0100, Guido Günther wrote: > This makes sure the clock tree setup for the dphy is not dependent on > other components. > > Without this change bringing up the display can fail like > > kernel: phy phy-30a00300.dphy.2: Invalid CM/CN/CO values: 165/217/1 > kernel: phy phy-30a00300.dphy.2: for hs_clk/ref_clk=451656000/593999998 ~ 165/217 > > if LCDIF doesn't set up that part of the clock tree first. This was > noticed when testing the Librem 5 devkit with defconfig. It doesn't > happen when modules are built in. > > Signed-off-by: Guido Günther <agx@sigxcpu.org> Applied, thanks.
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi index a841a023e8e0..50ae17f65a51 100644 --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi @@ -1016,9 +1016,14 @@ dphy: dphy@30a00300 { reg = <0x30a00300 0x100>; clocks = <&clk IMX8MQ_CLK_DSI_PHY_REF>; clock-names = "phy_ref"; - assigned-clocks = <&clk IMX8MQ_CLK_DSI_PHY_REF>; - assigned-clock-parents = <&clk IMX8MQ_VIDEO_PLL1_OUT>; - assigned-clock-rates = <24000000>; + assigned-clocks = <&clk IMX8MQ_VIDEO_PLL1_REF_SEL>, + <&clk IMX8MQ_VIDEO_PLL1_BYPASS>, + <&clk IMX8MQ_CLK_DSI_PHY_REF>, + <&clk IMX8MQ_VIDEO_PLL1>; + assigned-clock-parents = <&clk IMX8MQ_CLK_25M>, + <&clk IMX8MQ_VIDEO_PLL1>, + <&clk IMX8MQ_VIDEO_PLL1_OUT>; + assigned-clock-rates = <0>, <0>, <24000000>, <594000000>; #phy-cells = <0>; power-domains = <&pgc_mipi>; status = "disabled";
This makes sure the clock tree setup for the dphy is not dependent on other components. Without this change bringing up the display can fail like kernel: phy phy-30a00300.dphy.2: Invalid CM/CN/CO values: 165/217/1 kernel: phy phy-30a00300.dphy.2: for hs_clk/ref_clk=451656000/593999998 ~ 165/217 if LCDIF doesn't set up that part of the clock tree first. This was noticed when testing the Librem 5 devkit with defconfig. It doesn't happen when modules are built in. Signed-off-by: Guido Günther <agx@sigxcpu.org> --- Changes from v1: - as per review comment from Shawn Guo https://lore.kernel.org/linux-arm-kernel/20210110124629.GO28365@dragon/ Set clock rate for IMX8MQ_VIDEO_PLL1 too. Otherwise we end up with a close but not exact clock rate. arch/arm64/boot/dts/freescale/imx8mq.dtsi | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)