[PATCH v3 11/12] arm64: dts: imx8q: add linux,cma node for imx8qm-mek and imx8qxp-mek

Frank Li
2025-02-10T21:00:49Z

Add linux,cma node because some devices, such as camera, need big continue
physical memory.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
change from v1 to v3
- none
---
arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 9 +++++++++
arch/arm64/boot/dts/freescale/imx8qxp-mek.dts | 8 ++++++++
2 files changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
index 50fd3370f7dce..61ef00f4259e1 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
@@ -113,6 +113,15 @@ dsp_vdev0buffer: memory@94300000 {
reg = <0 0x94300000 0 0x100000>;
no-map;
};
+
+ /* global autoconfigured region for contiguous allocations */
+ linux,cma {
+ compatible = "shared-dma-pool";
+ alloc-ranges = <0 0xc0000000 0 0x3c000000>;
+ size = <0 0x3c000000>;
+ linux,cma-default;
+ reusable;
+ };
};

lvds_backlight0: backlight-lvds0 {
diff --git a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
index be79c793213a5..89c6516c5ba90 100644
--- a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
@@ -56,6 +56,14 @@ dsp_vdev0buffer: memory@94300000 {
reg = <0 0x94300000 0 0x100000>;
no-map;
};
+
+ linux,cma {
+ compatible = "shared-dma-pool";
+ alloc-ranges = <0 0xc0000000 0 0x3c000000>;
+ size = <0 0x3c000000>;
+ linux,cma-default;
+ reusable;
+ };
};

reg_usdhc2_vmmc: usdhc2-vmmc {

--
2.34.1