linux-kernel - Re: [PATCH V3 1/2] soc: qcom: smp2p: Use devname for interrupt descriptions

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Message-ID: <ee324f78-4789-4873-b8e5-e2ae7b42a5b2@linaro.org>
Date: Sat, 29 Jun 2024 15:03:19 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Sudeepgoud Patil <quic_sudeepgo@...cinc.com>, quic_bjorande@...cinc.com,
 andersson@...nel.org, quic_clew@...cinc.com, mathieu.poirier@...aro.org
Cc: linux-kernel@...r.kernel.org, quic_deesin@...cinc.com,
 linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH V3 1/2] soc: qcom: smp2p: Use devname for interrupt
 descriptions

On 27.06.2024 12:48 PM, Sudeepgoud Patil wrote:
> From: Chris Lew <quic_clew@...cinc.com>
> 
> When using /proc/interrupts to collect statistics on smp2p interrupt
> counts, it is hard to distinguish the different instances of smp2p from
> each other. For example to debug a processor boot issue, the ready and
> handover interrupts are checked for sanity to ensure the firmware
> reached a specific initialization stage.
> 
> Remove "smp2p" string from the irq request so that the irq will default
> to the device name. Add an .irq_print_chip() callback to print the irq
> chip name as the device name. These two changes allow for a unique name
> to be used in /proc/interrupts as shown below.
> 
> / # cat /proc/interrupts | grep smp2p
>  18:  ...      ipcc 196610 Edge      smp2p-adsp
>  20:  ...      ipcc 131074 Edge      smp2p-modem
> 170:  ...  smp2p-modem   1 Edge      q6v5 ready
> 178:  ...  smp2p-adsp   1 Edge      q6v5 ready
> 
> Signed-off-by: Chris Lew <quic_clew@...cinc.com>
> ---
>  drivers/soc/qcom/smp2p.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
> index a21241cbeec7..696c2a8387d0 100644
> --- a/drivers/soc/qcom/smp2p.c
> +++ b/drivers/soc/qcom/smp2p.c
> @@ -16,6 +16,7 @@
>  #include <linux/platform_device.h>
>  #include <linux/pm_wakeirq.h>
>  #include <linux/regmap.h>
> +#include <linux/seq_file.h>
>  #include <linux/soc/qcom/smem.h>
>  #include <linux/soc/qcom/smem_state.h>
>  #include <linux/spinlock.h>
> @@ -353,11 +354,19 @@ static int smp2p_set_irq_type(struct irq_data *irqd, unsigned int type)
>  	return 0;
>  }
>  
> +static void smp2p_irq_print_chip(struct irq_data *irqd, struct seq_file *p)
> +{
> +	struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
> +
> +	seq_printf(p, " %8s", dev_name(entry->smp2p->dev));

Not sure if the number is necessary but as you wish

Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad