[PATCH v8 03/11] arm64: dts: ti: k3-am62a-mcu: Add R5F remote proc node

[Andrew Davis]

On 5/5/25 10:05 AM, Mendez, Judith wrote:
> Hi Daniel,
> 
> On 5/5/2025 4:55 AM, Daniel Schultz wrote:
>> Hi,
>>
>> I'm unable to load the latest TI firmware (98efd20ec71f8c1c8f909d34ab656731) with this patch.
>>
>> [    7.012889] remoteproc remoteproc1: 79000000.r5f is available
>> [    7.032640] remoteproc remoteproc1: powering up 79000000.r5f
>> [    7.038626] remoteproc remoteproc1: Booting fw image am62a-mcu- r5f0_0-fw, size 53140
>> [    7.057209] remoteproc remoteproc1: bad phdr da 0x79100000 mem 0x47ea0

So this looks like the firmware has sections in the SRAM region. That would be the
issue here.

>> [    7.064716] remoteproc remoteproc1: Failed to load program segments: -22
>>
>> I figured out that the mcu sram node disappeared in v5. Apparently adding it back manually doesn't solve this problem. Any idea what's wrong?
> 
> For am62ax, there should be several items changed with this v8
> series in order for remoteproc to work with the TI default firmware:
> 
> 1. memory carveouts were reduced to 15MB [0] & edge-ai memory
> carveouts are not included here

This shouldn't be an issue, the default firmware doesn't
use the extended carveouts.

> 2. mcu_sram1 node removed [2]
> 

So when you say you added back the SRAM node, did you also add the
sram = <&mcu_ram>; in the core node?

Andrew

> If you want to catch up on the general direction for this series,
> please refer to [3]. atm remoteproc can fail with the default FW,
> but we are trying to move away from that firmware and this is the
> first step in that direction.
> 
> [0] https://lore.kernel.org/linux-devicetree/0ab5c5ec-cde3-41f1-8adf-2419b31497c1@ti.com/
> [1] https://lore.kernel.org/linux-devicetree/04e77daf-e775-44fa-82bf-8b6ebf73bcef@ti.com/
> [2] https://lore.kernel.org/linux-devicetree/32358aa1-0c02-4f4d-9782-2d8376c0d9fc@ti.com/
> [3] https://lore.kernel.org/linux-devicetree/e131298f-3713-482a-a740-ff89709270b4@ti.com/
> 
> ~ Judith
> 
>>
>> On 5/3/25 00:03, Judith Mendez wrote:
>>> From: Hari Nagalla <hnagalla at ti.com>
>>>
>>> AM62A SoCs have a single R5F core in the MCU voltage domain.
>>> Add the R5FSS node with the child node for core0 in MCU voltage
>>> domain .dtsi file.
>>>
>>> Signed-off-by: Hari Nagalla <hnagalla at ti.com>
>>> Signed-off-by: Judith Mendez <jm at ti.com>
>>> Acked-by: Andrew Davis <afd at ti.com>
>>> ---
>>>   arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi | 25 ++++++++++++++++++++++++
>>>   1 file changed, 25 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi b/arch/arm64/ boot/dts/ti/k3-am62a-mcu.dtsi
>>> index 9ed9d703ff24..ee961ced7208 100644
>>> --- a/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
>>> +++ b/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
>>> @@ -174,4 +174,29 @@ mcu_mcan1: can at 4e18000 {
>>>           bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
>>>           status = "disabled";
>>>       };
>>> +
>>> +    mcu_r5fss0: r5fss at 79000000 {
>>> +        compatible = "ti,am62-r5fss";
>>> +        #address-cells = <1>;
>>> +        #size-cells = <1>;
>>> +        ranges = <0x79000000 0x00 0x79000000 0x8000>,
>>> +             <0x79020000 0x00 0x79020000 0x8000>;
>>> +        power-domains = <&k3_pds 7 TI_SCI_PD_EXCLUSIVE>;
>>> +        status = "disabled";
>>> +
>>> +        mcu_r5fss0_core0: r5f at 79000000 {
>>> +            compatible = "ti,am62-r5f";
>>> +            reg = <0x79000000 0x00008000>,
>>> +                  <0x79020000 0x00008000>;
>>> +            reg-names = "atcm", "btcm";
>>> +            resets = <&k3_reset 9 1>;
>>> +            firmware-name = "am62a-mcu-r5f0_0-fw";
>>> +            ti,atcm-enable = <0>;
>>> +            ti,btcm-enable = <1>;
>>> +            ti,loczrama = <0>;
>>> +            ti,sci = <&dmsc>;
>>> +            ti,sci-dev-id = <9>;
>>> +            ti,sci-proc-ids = <0x03 0xff>;
>>> +        };
>>> +    };
>>>   };
>