[PATCH v2 1/5] arm64: dts: ti: k3-j722s-ti-ipc-firmware: Add memory pool for DSP i/o buffers
From: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Date: 2026-01-14 08:47:17
Also in:
dri-devel, linux-arm-kernel, linux-doc, linux-media, lkml
Subsystem:
arm/texas instruments k3 architecture, the rest · Maintainers:
Nishanth Menon, Vignesh Raghavendra, Tero Kristo, Linus Torvalds
This memory region is used by the DRM/accel driver to allocate addresses for buffers that are used for communication with the DSP cores and for their intermediate results. Signed-off-by: Tomeu Vizoso <tomeu@tomeuvizoso.net> --- arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi
index 3fbff927c4c08bce741555aa2753a394b751144f..b80d2a5a157ad59eaed8e57b22f1f4bce4765a85 100644
--- a/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi@@ -42,6 +42,11 @@ c7x_0_memory_region: memory@a3100000 { no-map; }; + c7x_iova_pool: iommu-pool@a7000000 { + reg = <0x00 0xa7000000 0x00 0x18200000>; + no-map; + }; + c7x_1_dma_memory_region: memory@a4000000 { compatible = "shared-dma-pool"; reg = <0x00 0xa4000000 0x00 0x100000>;
@@ -151,13 +156,15 @@ &main_r5fss0_core0 { &c7x_0 { mboxes = <&mailbox0_cluster2 &mbox_c7x_0>; memory-region = <&c7x_0_dma_memory_region>, - <&c7x_0_memory_region>; + <&c7x_0_memory_region>, + <&c7x_iova_pool>; status = "okay"; }; &c7x_1 { mboxes = <&mailbox0_cluster3 &mbox_c7x_1>; memory-region = <&c7x_1_dma_memory_region>, - <&c7x_1_memory_region>; + <&c7x_1_memory_region>, + <&c7x_iova_pool>; status = "okay"; };
--
2.52.0