[PATCH 2/5] firmware: zynqmp: Load config overlay for core0 to pmufw

[Soma, Ashok Reddy]

Hi Stefan,

I will send V2 with the changes.

Thanks,
Ashok

-----Original Message-----
From: Stefan Herbrechtsmeier <stefan at herbrechtsmeier.net> 
Sent: Wednesday, July 20, 2022 9:32 PM
To: Soma, Ashok Reddy <ashok.reddy.soma at amd.com>; Stefan Herbrechtsmeier <stefan.herbrechtsmeier-oss at weidmueller.com>; Simek, Michal <michal.simek at amd.com>; Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>; u-boot at lists.denx.de
Cc: adrian.fiergolski at fastree3d.com; jh80.chung at samsung.com; sven at svenpeter.dev; kettenis at openbsd.org; sjg at chromium.org; git at xilinx.com; git (AMD-Xilinx) <git at amd.com>
Subject: Re: [PATCH 2/5] firmware: zynqmp: Load config overlay for core0 to pmufw

Hi,

Am 19.07.22 um 06:44 schrieb Soma, Ashok Reddy:
> Hi Stefan,
> 
>> -----Original Message-----
>> From: Stefan Herbrechtsmeier 
>> <stefan.herbrechtsmeier-oss at weidmueller.com>
>> Sent: Saturday, July 16, 2022 4:48 PM
>> To: Simek, Michal <michal.simek at amd.com>; Ashok Reddy Soma 
>> <ashok.reddy.soma at xilinx.com>; u-boot at lists.denx.de
>> Cc: adrian.fiergolski at fastree3d.com; jh80.chung at samsung.com; 
>> sven at svenpeter.dev; kettenis at openbsd.org; sjg at chromium.org; 
>> git at xilinx.com; git (AMD-Xilinx) <git at amd.com>
>> Subject: Re: [PATCH 2/5] firmware: zynqmp: Load config overlay for 
>> core0 to pmufw
>>
>> CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email.
>>
>>
>> Am 15.07.2022 um 18:34 schrieb Michal Simek:
>>>
>>>
>>> On 7/15/22 18:13, Stefan Herbrechtsmeier wrote:
>>>> Am 15.07.2022 um 11:39 schrieb Ashok Reddy Soma:
>>>>> Try loading pmufw config overlay for core0, if it doesn't return 
>>>>> any error it means pmufw is accepting nodes for other IP's. 
>>>>> Otherwise dont try to load config object for any other IP, just 
>>>>> return from zynqmp_pmufw_node function.
>>>>>
>>>>> Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>
>>>>> ---
>>>>>
>>>>>    drivers/firmware/firmware-zynqmp.c | 14 ++++++++++++++
>>>>>    1 file changed, 14 insertions(+)
>>>>>
>>>>> diff --git a/drivers/firmware/firmware-zynqmp.c
>>>>> b/drivers/firmware/firmware-zynqmp.c
>>>>> index 34d9b47003..288151533e 100644
>>>>> --- a/drivers/firmware/firmware-zynqmp.c
>>>>> +++ b/drivers/firmware/firmware-zynqmp.c
>>>>> @@ -68,8 +68,13 @@ int zynqmp_pmufw_config_close(void)
>>>>>        return 0;
>>>>>    }
>>>>> +static bool config_enabled;
>>>>> +
>>>>
>>>> Please move the variable inside the function.
>>>
>>> How can this work? When you move it to zynqmp_pmufw_node() then 
>>> won't be visible in zynqmp_power_probe() and vice-versa.
> 
>> If you reuse the zynqmp_pmufw_node function in zynqmp_power_probe function you can check the id parameter to update the config_enabled variable in zynqmp_pmufw_node.
> 
> are you suggesting to change like this ?  this works fine for me. 
> Shall i send V2 with this >
> --- a/drivers/firmware/firmware-zynqmp.c
> +++ b/drivers/firmware/firmware-zynqmp.c
> @@ -29,6 +29,7 @@ struct zynqmp_power {
>   } zynqmp_power;
>   
>   #define NODE_ID_LOCATION       5
> +#define APU0_ID                        NODE_APU_0

Why don't you use the NODE_APU_0 define direct?

>   static unsigned int xpm_configobject[] = {
>          
> /*********************************************************************
> */ @@ -68,18 +69,22 @@ int zynqmp_pmufw_config_close(void)
>          return 0;
>   }
>   
> -static bool config_enabled;
>   
>   int zynqmp_pmufw_node(u32 id)
>   {
> -       if (!config_enabled)
> +       static bool config_enabled;

I would invert the meaning from enabled to skip ...

> +       int ret;
> +
> +       if (!config_enabled && id != APU0_ID)

to simplify the check.

	if (skip)

>                  return 0;
>   
>          /* Record power domain id */
>          xpm_configobject[NODE_ID_LOCATION] = id;
>   
> -       zynqmp_pmufw_load_config_object(xpm_configobject,
> -                                       sizeof(xpm_configobject));
> +       ret = zynqmp_pmufw_load_config_object(xpm_configobject,
> +                                             sizeof(xpm_configobject));
> +       if(!ret && id == APU0_ID)
> +               config_enabled = true;

	if(ret && id == APU0_ID)
		skip = true;

>   
>          return 0;
>   }
> @@ -272,14 +277,8 @@ static int zynqmp_power_probe(struct udevice *dev)
>                 ret >> ZYNQMP_PM_VERSION_MAJOR_SHIFT,
>                 ret & ZYNQMP_PM_VERSION_MINOR_MASK);
>   
> -       if (IS_ENABLED(CONFIG_ARCH_ZYNQMP)) {
> -               xpm_configobject[NODE_ID_LOCATION] = NODE_APU_0;
> -
> -               ret = zynqmp_pmufw_load_config_object(xpm_configobject,
> -                                                     sizeof(xpm_configobject));
> -               if (!ret)
> -                       config_enabled = true;
> -       }
> +       if (IS_ENABLED(CONFIG_ARCH_ZYNQMP))
> +               zynqmp_pmufw_node(APU0_ID);
>   
>          return 0;
> 
Regards
   Stefan