linux-kernel - Re: [PATCH 2/3] media: rkisp1: debug: Add register dump for IS

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Message-ID: <ZWhhgQPSgKkkK/ma@tom-HP-ZBook-Fury-15-G7-Mobile-Workstation>
Date:   Thu, 30 Nov 2023 11:18:41 +0100
From:   Tommaso Merciai <tomm.merciai@...il.com>
To:     Alexander Stein <alexander.stein@...tq-group.com>
Cc:     Kieran Bingham <kieran.bingham@...asonboard.com>,
        Paul Elder <paul.elder@...asonboard.com>,
        linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        tomi.valkeinen@...asonboard.com, umang.jain@...asonboard.com,
        Dafna Hirschfeld <dafna@...tmail.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] media: rkisp1: debug: Add register dump for IS

Hi Alexander,

On Thu, Nov 30, 2023 at 10:54:46AM +0100, Alexander Stein wrote:
> Hi Paul,
> 
> Am Donnerstag, 30. November 2023, 10:47:00 CET schrieb Paul Elder:
> > On Wed, Nov 29, 2023 at 08:05:42PM +0000, Kieran Bingham wrote:
> > > Quoting Paul Elder (2023-11-29 09:29:55)
> > > 
> > > > Add register dump for the image stabilizer module to debugfs.
> > > 
> > > Is the Image Stabilizer on all variants of the ISP?
> > > 
> > > I.e. is it valid register space on the RK3399 implementation?
> > 
> > Yes, it is.
> 
> Is there some public documentation available how this ISP works? For RK3399 or 
> i.MX8MP.

For the ISP there is some public docs into imx8mp reference manual at page 5895
chapter:

13.14 Image Signal Processor (ISP)

https://www.nxp.com/webapp/Download?colCode=IMX8MPRM
https://www.nxp.com/design/development-boards/i-mx-evaluation-and-development-boards/evaluation-kit-for-the-i-mx-8m-plus-applications-processor:8MPLUSLPD4-EVK

This is not the full docs I think but cover some part of the ISP
functionality.

Hope this help.

Regards,
Tommaso

> 
> Best regards,
> Alexander
> 
> > 
> > > If so then:
> > > Reviewed-by: Kieran Bingham <kieran.bingham@...asonboard.com>
> > > 
> > > > Signed-off-by: Paul Elder <paul.elder@...asonboard.com>
> > > > ---
> > > > 
> > > >  .../platform/rockchip/rkisp1/rkisp1-debug.c    | 18 ++++++++++++++++++
> > > >  1 file changed, 18 insertions(+)
> > > > 
> > > > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c
> > > > b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c index
> > > > 71df3dc95e6f..f66b9754472e 100644
> > > > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c
> > > > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c
> > > > @@ -139,6 +139,21 @@ static int rkisp1_debug_dump_mi_mp_show(struct
> > > > seq_file *m, void *p)> > 
> > > >  }
> > > >  DEFINE_SHOW_ATTRIBUTE(rkisp1_debug_dump_mi_mp);
> > > > 
> > > > +static int rkisp1_debug_dump_is_show(struct seq_file *m, void *p)
> > > > +{
> > > > +       static const struct rkisp1_debug_register registers[] = {
> > > > +               RKISP1_DEBUG_SHD_REG(ISP_IS_H_OFFS),
> > > > +               RKISP1_DEBUG_SHD_REG(ISP_IS_V_OFFS),
> > > > +               RKISP1_DEBUG_SHD_REG(ISP_IS_H_SIZE),
> > > > +               RKISP1_DEBUG_SHD_REG(ISP_IS_V_SIZE),
> > > 
> > > I expect so as you haven't added the register macros in this series so
> > > they must already be there ...
> > 
> > Yep :)
> > 
> > 
> > Paul
> > 
> > > > +               { /* Sentinel */ },
> > > > +       };
> > > > +       struct rkisp1_device *rkisp1 = m->private;
> > > > +
> > > > +       return rkisp1_debug_dump_regs(rkisp1, m, 0, registers);
> > > > +}
> > > > +DEFINE_SHOW_ATTRIBUTE(rkisp1_debug_dump_is);
> > > > +
> > > > 
> > > >  #define RKISP1_DEBUG_DATA_COUNT_BINS   32
> > > >  #define RKISP1_DEBUG_DATA_COUNT_STEP   (4096 /
> > > >  RKISP1_DEBUG_DATA_COUNT_BINS)> > 
> > > > @@ -235,6 +250,9 @@ void rkisp1_debug_init(struct rkisp1_device *rkisp1)
> > > > 
> > > >         debugfs_create_file("mi_mp", 0444, regs_dir, rkisp1,
> > > >         
> > > >                             &rkisp1_debug_dump_mi_mp_fops);
> > > > 
> > > > +
> > > > +       debugfs_create_file("is", 0444, regs_dir, rkisp1,
> > > > +                           &rkisp1_debug_dump_is_fops);
> > > > 
> > > >  }
> > > >  
> > > >  void rkisp1_debug_cleanup(struct rkisp1_device *rkisp1)
> 
> 
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