Re: [PATCH v2 2/2] raspi: fixup additional vc created nodes

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Hello Roland,

On 19.02.24 20:14, Roland Hieber wrote:
> Hi,
> 
> On Mon, Sep 25, 2023 at 01:10:05PM +0200, Denis Osterland-Heim wrote:
>> From: Denis OSTERLAND-HEIM <denis.osterland@diehl.com>
>>
>> The video core creates some additional nodes.
>> This code takes over this values.
>> The /hat node is only there if an raspi hat with EEPROM is detected.
>>
>> Signed-off-by: Denis OSTERLAND-HEIM <denis.osterland@diehl.com>
>> Acked-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
>> ---
>>  arch/arm/boards/raspberry-pi/rpi-common.c | 39 +++++++++++++++++------
>>  1 file changed, 30 insertions(+), 9 deletions(-)
>>
>> diff --git a/arch/arm/boards/raspberry-pi/rpi-common.c
>> b/arch/arm/boards/raspberry-pi/rpi-common.c
>> index ceafd55a56..713fad78c9 100644
>> --- a/arch/arm/boards/raspberry-pi/rpi-common.c
>> +++ b/arch/arm/boards/raspberry-pi/rpi-common.c
>> @@ -264,19 +264,37 @@ static enum reset_src_type
>> rpi_decode_pm_rsts(struct device_node *chosen,
>>  
>>  static int rpi_vc_fdt_fixup(struct device_node *root, void *data)
>>  {
>> -       const struct device_node *vc_chosen = data;
>> -       struct device_node *chosen;
>> +       const struct device_node *vc_node = data;
>> +       struct device_node *node;
>> +       struct property *pp;
>>  
>> -       chosen = of_create_node(root, "/chosen");
>> -       if (!chosen)
>> +       node = of_create_node(root, vc_node->full_name);
>> +       if (!node)
>>                 return -ENOMEM;
>>  
>> -       of_copy_property(vc_chosen, "overlay_prefix", chosen);
>> -       of_copy_property(vc_chosen, "os_prefix", chosen);
>> +       for_each_property_of_node(vc_node, pp)
>> +               of_copy_property(vc_node, pp->name, node);
>>  
>>         return 0;
>>  }
>>  
>> +static struct device_node *register_vc_fixup(struct device_node *root,
>> +                                            const char *path)
>> +{
>> +       struct device_node *ret, *tmp;
>> +
>> +       ret = of_find_node_by_path_from(root, path);
>> +       if (ret) {
>> +               tmp = of_dup(ret);
>> +               tmp->full_name = xstrdup(ret->full_name);
>> +               of_register_fixup(rpi_vc_fdt_fixup, tmp);
>> +       } else {
>> +               pr_info("no '%s' node found in vc fdtn", path);
>> +       }
>> +
>> +       return ret;
>> +}
>> +
>>  static u32 rpi_boot_mode, rpi_boot_part;
>>  /* Extract useful information from the VideoCore FDT we got.
>>   * Some parameters are defined here:
>> @@ -300,14 +318,17 @@ static void rpi_vc_fdt_parse(struct device_node
>> *root)
>>                 free(str);
>>         }
>>  
>> -       chosen = of_find_node_by_path_from(root, "/chosen");
>> +       register_vc_fixup(root, "/system");
>> +       register_vc_fixup(root, "/axi");
>> +       register_vc_fixup(root, "/reserved-memory");
>> +       register_vc_fixup(root, "/hat");
>> +       register_vc_fixup(root, "/chosen/bootloader");
>> +       chosen = register_vc_fixup(root, "/chosen");
> 
> This throws a lot of new warnings and errors on our RPi 3B:
> 
>     barebox 2024.01.0 #1 2024-02-01T00:00:00+00:00
>     Buildsystem version: DistroKit-2019.12.0-552-g775624b9f5d6
> 
>     Board: Raspberry Pi 3 Model B
>     deep-probe: supported due to raspberrypi,3-model-b
>     netconsole: registered as netconsole-1
>     bcm2835-sdhost 3f202000.mmc@7e202000.of: registered as mci0
>     bcm2835_mci 3f300000.mmc@7e300000.of: registered as mci1
>     mci0: detected SD card version 2.0
>     mci0: registered disk0
>     state: New state registered 'state'
>     state: Using bucket 0@0x00000000
>     malloc space: 0x1d87f620 -> 0x3b0fec3f (size 472.5 MiB)
>     WARNING: no property 'serial-number' found in vc fdt's '' node
>     no '/system' node found in vc fdt
>     no '/axi' node found in vc fdt
>     no '/hat' node found in vc fdt
>     no '/chosen/bootloader' node found in vc fdt
>     WARNING: no property 'bootargs' found in vc fdt's '/chosen' node
>     WARNING: no property 'overlay_prefix' found in vc fdt's '/chosen' node
>     WARNING: no property 'os_prefix' found in vc fdt's '/chosen' node
>     WARNING: 'pm_rsts' value not found in vc fdt
>     ERROR: Won't delete root device node
>     environment load /boot/barebox.env: No such file or directory
>     Maybe you have to create the partition.
> 
> Do you have any idea what is going on here? 
> 
> I also don't see /vc.dtb, which should have been created. I have
> 'vc.kernel: kernel7.img' in the 'global' output, but nothing else
> starting with vc.*.

I think that a non-existent /vc.dtb is expected if there's no DTs
in the boot partition as is the case with DistroKit (except for rpi4)
or if using barebox-dt-2nd.img.

I think the info/warning messages should just be dropped.

Cheers,
Ahmad

> 
>  - Roland
> 
>>         if (!chosen) {
>>                 pr_err("no '/chosen' node found in vc fdtn");
>>                 goto out;
>>         }
>>  
>> -       of_register_fixup(rpi_vc_fdt_fixup, of_dup(chosen));
>> -
>>         bootloader = of_find_node_by_name(chosen, "bootloader");
>>  
>>         str = of_read_vc_string(chosen, "bootargs");
>> -- 
>> 2.39.2
>>
>>
> 

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