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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Oct 2025 18:01:28.0130 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: eb5b7295-e4e3-4fa5-b813-08de17de5941 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB77.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYYPR10MB7651 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251030_110134_747938_3758AE3D X-CRM114-Status: GOOD ( 22.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi All, On 10/30/2025 9:36 PM, Beleswar Padhi wrote: > Each mailbox cluster has 16 hardware FIFOs shared among 4 users (CPUs). > Each FIFO supports one-way communication between two users and is > configured by the firmware. > > For TI IPC firmware, the FIFOs starting from 0 are assigned for > communication between the Cortex A-core (running Linux) and remote > processors (running RTOS). The remaining FIFOs are used for > RTOS-to-RTOS communication. > > In some cases, pending messages may remain in the RTOS-to-RTOS FIFOs if > a remote processor is powered off or in a bad state. To avoid issues > such as suspend failures, restrict the 'ti,mbox-num-fifos' property in > the device tree to only include the FIFOs used for Linux-to-RTOS > communication. This ensures the Linux mailbox driver checks only its > own FIFOs and does not interfere with those used by other remote > processors. > > Fixes: a49f991e740f ("arm64: dts: ti: k3-am62-verdin: Add missing cfg for TI IPC Firmware") > Closes: https://lore.kernel.org/all/sid7gtg5vay5qgicsl6smnzwg5mnneoa35cempt5ddwjvedaio@hzsgcx6oo74l/ > Signed-off-by: Beleswar Padhi > --- > Cc: Francesco Dolcini > Cc: Hiago De Franco > Please help in testing the patch on Toradex platforms. Please ignore the below patch. We had a discussion internally and want to take a different route for this problem. I will post the new patch tomorrow. Thanks, Beleswar > > Testing Done: > 1. Tested Boot across all TI K3 EVM/SK boards. > 2. Tested IPC on all TI K3 J7* EVM/SK boards (& AM62x SK). > 3. Tested that the patch generates no new warnings/errors. > > arch/arm64/boot/dts/ti/k3-am62-ti-ipc-firmware.dtsi | 1 + > arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi | 3 +++ > arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi | 2 ++ > arch/arm64/boot/dts/ti/k3-am64-ti-ipc-firmware.dtsi | 3 +++ > arch/arm64/boot/dts/ti/k3-am65-ti-ipc-firmware.dtsi | 2 ++ > arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi | 2 ++ > arch/arm64/boot/dts/ti/k3-j721e-ti-ipc-firmware.dtsi | 5 +++++ > arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi | 4 ++++ > arch/arm64/boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi | 4 ++++ > .../dts/ti/k3-j784s4-j742s2-ti-ipc-firmware-common.dtsi | 6 ++++++ > arch/arm64/boot/dts/ti/k3-j784s4-ti-ipc-firmware.dtsi | 1 + > 11 files changed, 33 insertions(+) > > diff --git a/arch/arm64/boot/dts/ti/k3-am62-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62-ti-ipc-firmware.dtsi > index ea69fab9b52b..913bd5ff49f7 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62-ti-ipc-firmware.dtsi > @@ -21,6 +21,7 @@ mcu_m4fss_memory_region: memory@9cc00000 { > > &mailbox0_cluster0 { > status = "okay"; > + ti,mbox-num-fifos = <4>; > > mbox_m4_0: mbox-m4-0 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi > index 950f4f37d477..b377edb52bc9 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi > @@ -33,6 +33,7 @@ mcu_r5fss0_core0_memory_region: memory@9b900000 { > > &mailbox0_cluster0 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_r5_0: mbox-r5-0 { > ti,mbox-rx = <0 0 0>; > @@ -42,6 +43,7 @@ mbox_r5_0: mbox-r5-0 { > > &mailbox0_cluster1 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_c7x_0: mbox-c7x-0 { > ti,mbox-rx = <0 0 0>; > @@ -51,6 +53,7 @@ mbox_c7x_0: mbox-c7x-0 { > > &mailbox0_cluster2 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_mcu_r5_0: mbox-mcu-r5-0 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi > index d29a5dbe13ef..82512e7a44ea 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi > @@ -21,6 +21,7 @@ mcu_r5fss0_core0_memory_region: memory@9b900000 { > > &mailbox0_cluster0 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_r5_0: mbox-r5-0 { > ti,mbox-rx = <0 0 0>; > @@ -30,6 +31,7 @@ mbox_r5_0: mbox-r5-0 { > > &mailbox0_cluster1 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_mcu_r5_0: mbox-mcu-r5-0 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-am64-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am64-ti-ipc-firmware.dtsi > index 6b10646ae64a..793e965c5a4b 100644 > --- a/arch/arm64/boot/dts/ti/k3-am64-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am64-ti-ipc-firmware.dtsi > @@ -63,6 +63,7 @@ rtos_ipc_memory_region: memory@a5000000 { > > &mailbox0_cluster2 { > status = "okay"; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss0_core0: mbox-main-r5fss0-core0 { > ti,mbox-rx = <0 0 2>; > @@ -77,6 +78,7 @@ mbox_main_r5fss0_core1: mbox-main-r5fss0-core1 { > > &mailbox0_cluster4 { > status = "okay"; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss1_core0: mbox-main-r5fss1-core0 { > ti,mbox-rx = <0 0 2>; > @@ -91,6 +93,7 @@ mbox_main_r5fss1_core1: mbox-main-r5fss1-core1 { > > &mailbox0_cluster6 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_m4_0: mbox-m4-0 { > ti,mbox-rx = <0 0 2>; > diff --git a/arch/arm64/boot/dts/ti/k3-am65-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am65-ti-ipc-firmware.dtsi > index 61ab0357fc0d..579533df6bd4 100644 > --- a/arch/arm64/boot/dts/ti/k3-am65-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am65-ti-ipc-firmware.dtsi > @@ -28,6 +28,7 @@ rtos_ipc_memory_region: memory@a2000000 { > &mailbox0_cluster0 { > status = "okay"; > interrupts = <436>; > + ti,mbox-num-fifos = <2>; > > mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 { > ti,mbox-tx = <1 0 0>; > @@ -38,6 +39,7 @@ mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 { > &mailbox0_cluster1 { > status = "okay"; > interrupts = <432>; > + ti,mbox-num-fifos = <2>; > > mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 { > ti,mbox-tx = <1 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi > index 9477f1efbbc6..4245a5319085 100644 > --- a/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi > @@ -52,6 +52,7 @@ rtos_ipc_memory_region: memory@a4000000 { > &mailbox0_cluster0 { > status = "okay"; > interrupts = <436>; > + ti,mbox-num-fifos = <4>; > > mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -67,6 +68,7 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 { > &mailbox0_cluster1 { > status = "okay"; > interrupts = <432>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss0_core0: mbox-main-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-ti-ipc-firmware.dtsi > index 40c6cc99c405..4003f125dbe7 100644 > --- a/arch/arm64/boot/dts/ti/k3-j721e-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j721e-ti-ipc-firmware.dtsi > @@ -114,6 +114,7 @@ rtos_ipc_memory_region: memory@aa000000 { > &mailbox0_cluster0 { > status = "okay"; > interrupts = <436>; > + ti,mbox-num-fifos = <4>; > > mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -129,6 +130,7 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 { > &mailbox0_cluster1 { > status = "okay"; > interrupts = <432>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss0_core0: mbox-main-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -144,6 +146,7 @@ mbox_main_r5fss0_core1: mbox-main-r5fss0-core1 { > &mailbox0_cluster2 { > status = "okay"; > interrupts = <428>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss1_core0: mbox-main-r5fss1-core0 { > ti,mbox-rx = <0 0 0>; > @@ -159,6 +162,7 @@ mbox_main_r5fss1_core1: mbox-main-r5fss1-core1 { > &mailbox0_cluster3 { > status = "okay"; > interrupts = <424>; > + ti,mbox-num-fifos = <4>; > > mbox_c66_0: mbox-c66-0 { > ti,mbox-rx = <0 0 0>; > @@ -174,6 +178,7 @@ mbox_c66_1: mbox-c66-1 { > &mailbox0_cluster4 { > status = "okay"; > interrupts = <420>; > + ti,mbox-num-fifos = <2>; > > mbox_c71_0: mbox-c71-0 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi > index ebab0cc580bb..2ef5c95f6e93 100644 > --- a/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi > @@ -100,6 +100,7 @@ rtos_ipc_memory_region: memory@a8000000 { > &mailbox0_cluster0 { > status = "okay"; > interrupts = <436>; > + ti,mbox-num-fifos = <4>; > > mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -115,6 +116,7 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 { > &mailbox0_cluster1 { > status = "okay"; > interrupts = <432>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss0_core0: mbox-main-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -130,6 +132,7 @@ mbox_main_r5fss0_core1: mbox-main-r5fss0-core1 { > &mailbox0_cluster2 { > status = "okay"; > interrupts = <428>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss1_core0: mbox-main-r5fss1-core0 { > ti,mbox-rx = <0 0 0>; > @@ -145,6 +148,7 @@ mbox_main_r5fss1_core1: mbox-main-r5fss1-core1 { > &mailbox0_cluster4 { > status = "okay"; > interrupts = <420>; > + ti,mbox-num-fifos = <4>; > > mbox_c71_0: mbox-c71-0 { > ti,mbox-rx = <0 0 0>; > 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 cb7cd385a165..c25dec00cc2a 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 > @@ -63,6 +63,7 @@ rtos_ipc_memory_region: memory@a5000000 { > > &mailbox0_cluster0 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_wkup_r5_0: mbox-wkup-r5-0 { > ti,mbox-rx = <0 0 0>; > @@ -72,6 +73,7 @@ mbox_wkup_r5_0: mbox-wkup-r5-0 { > > &mailbox0_cluster1 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_mcu_r5_0: mbox-mcu-r5-0 { > ti,mbox-rx = <0 0 0>; > @@ -81,6 +83,7 @@ mbox_mcu_r5_0: mbox-mcu-r5-0 { > > &mailbox0_cluster2 { > status = "okay"; > + ti,mbox-num-fifos = <2>; > > mbox_c7x_0: mbox-c7x-0 { > ti,mbox-rx = <0 0 0>; > @@ -90,6 +93,7 @@ mbox_c7x_0: mbox-c7x-0 { > > &mailbox0_cluster3 { > status = "okay"; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5_0: mbox-main-r5-0 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-ti-ipc-firmware-common.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-ti-ipc-firmware-common.dtsi > index 455397227d4a..809ecf26ddd1 100644 > --- a/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-ti-ipc-firmware-common.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-ti-ipc-firmware-common.dtsi > @@ -130,6 +130,7 @@ c71_2_memory_region: memory@aa100000 { > &mailbox0_cluster0 { > status = "okay"; > interrupts = <436>; > + ti,mbox-num-fifos = <4>; > > mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -145,6 +146,7 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 { > &mailbox0_cluster1 { > status = "okay"; > interrupts = <432>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss0_core0: mbox-main-r5fss0-core0 { > ti,mbox-rx = <0 0 0>; > @@ -160,6 +162,7 @@ mbox_main_r5fss0_core1: mbox-main-r5fss0-core1 { > &mailbox0_cluster2 { > status = "okay"; > interrupts = <428>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss1_core0: mbox-main-r5fss1-core0 { > ti,mbox-rx = <0 0 0>; > @@ -175,6 +178,7 @@ mbox_main_r5fss1_core1: mbox-main-r5fss1-core1 { > &mailbox0_cluster3 { > status = "okay"; > interrupts = <424>; > + ti,mbox-num-fifos = <4>; > > mbox_main_r5fss2_core0: mbox-main-r5fss2-core0 { > ti,mbox-rx = <0 0 0>; > @@ -190,6 +194,7 @@ mbox_main_r5fss2_core1: mbox-main-r5fss2-core1 { > &mailbox0_cluster4 { > status = "okay"; > interrupts = <420>; > + ti,mbox-num-fifos = <4>; > > mbox_c71_0: mbox-c71-0 { > ti,mbox-rx = <0 0 0>; > @@ -205,6 +210,7 @@ mbox_c71_1: mbox-c71-1 { > &mailbox0_cluster5 { > status = "okay"; > interrupts = <416>; > + ti,mbox-num-fifos = <2>; > > mbox_c71_2: mbox-c71-2 { > ti,mbox-rx = <0 0 0>; > diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-ti-ipc-firmware.dtsi > index 81b508b9b05e..67af04b25fd0 100644 > --- a/arch/arm64/boot/dts/ti/k3-j784s4-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j784s4-ti-ipc-firmware.dtsi > @@ -20,6 +20,7 @@ c71_3_memory_region: memory@ab100000 { > }; > > &mailbox0_cluster5 { > + ti,mbox-num-fifos = <4>; > > mbox_c71_3: mbox-c71-3 { > ti,mbox-rx = <2 0 0>;