From: Romain Naour <romain.naour@xxxxxxx>
A bus_dma_limit was added for l3 bus by commit cfb5d65f2595
("ARM: dts: dra7: Add bus_dma_limit for L3 bus") to fix an issue
observed only with SATA on DRA7-EVM with 4GB RAM and CONFIG_ARM_LPAE
enabled.
Since kernel 5.13, the SATA issue can be reproduced again following
the SATA node move from L3 bus to L4_cfg in commit 8af15365a368
("ARM: dts: Configure interconnect target module for dra7 sata").
Fix it by adding an empty dma-ranges property to l4_cfg and
segment@100000 nodes (parent device tree node of SATA controller) to
inherit the 2GB dma ranges limit from l3 bus node.
Note: A similar fix was applied for PCIe controller by commit
90d4d3f4ea45 ("ARM: dts: dra7: Fix bus_dma_limit for PCIe").
Fixes: 8af15365a368 ("ARM: dts: Configure interconnect target module for dra7 sata").
Link: https://lore.kernel.org/linux-omap/c583e1bb-f56b-4489-8012-ce742e85f233@xxxxxxxx/
Signed-off-by: Romain Naour <romain.naour@xxxxxxx>
---
arch/arm/boot/dts/ti/omap/dra7-l4.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/ti/omap/dra7-l4.dtsi b/arch/arm/boot/dts/ti/omap/dra7-l4.dtsi
index 6e67d99832ac..ba7fdaae9c6e 100644
--- a/arch/arm/boot/dts/ti/omap/dra7-l4.dtsi
+++ b/arch/arm/boot/dts/ti/omap/dra7-l4.dtsi
@@ -12,6 +12,7 @@ &l4_cfg { /* 0x4a000000 */
ranges = <0x00000000 0x4a000000 0x100000>, /* segment 0 */
<0x00100000 0x4a100000 0x100000>, /* segment 1 */
<0x00200000 0x4a200000 0x100000>; /* segment 2 */
+ dma-ranges;
segment@0 { /* 0x4a000000 */
compatible = "simple-pm-bus";
@@ -557,6 +558,7 @@ segment@100000 { /* 0x4a100000 */
<0x0007e000 0x0017e000 0x001000>, /* ap 124 */
<0x00059000 0x00159000 0x001000>, /* ap 125 */
<0x0005a000 0x0015a000 0x001000>; /* ap 126 */
+ dma-ranges;
target-module@2000 { /* 0x4a102000, ap 27 3c.0 */
compatible = "ti,sysc";
--
2.45.0
