Re: [PATCH 1/1] media: nxp: imx8-isi-debug: Add missing registers to debugfs output

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Hi Laurent,

Am Donnerstag, 7. Dezember 2023, 11:14:00 CET schrieb Laurent Pinchart:
> Hi Alexander,
> 
> On Thu, Dec 07, 2023 at 08:52:46AM +0100, Alexander Stein wrote:
> > Am Mittwoch, 6. Dezember 2023, 23:36:36 CET schrieb Laurent Pinchart:
> > > On Wed, Dec 06, 2023 at 10:44:01AM +0100, Alexander Stein wrote:
> > > > The extended address registers are missing in the debug output
> > > > register
> > > > list. Add them.
> > > > 
> > > > Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> > > > ---
> > > > 
> > > >  drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c | 7 +++++++
> > > >  1 file changed, 7 insertions(+)
> > > > 
> > > > diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c
> > > > b/drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c index
> > > > 6709ab7ea1f3..3ac5685d6cc1 100644
> > > > --- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c
> > > > +++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c
> > > > @@ -66,6 +66,13 @@ static int mxc_isi_debug_dump_regs_show(struct
> > > > seq_file *m, void *p)> > > 
> > > >  		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_V),
> > > >  		MXC_ISI_DEBUG_REG(CHNL_SCL_IMG_CFG),
> > > >  		MXC_ISI_DEBUG_REG(CHNL_FLOW_CTRL),
> > > > 
> > > > +		MXC_ISI_DEBUG_REG(CHNL_Y_BUF1_XTND_ADDR),
> > > > +		MXC_ISI_DEBUG_REG(CHNL_U_BUF1_XTND_ADDR),
> > > > +		MXC_ISI_DEBUG_REG(CHNL_V_BUF1_XTND_ADDR),
> > > > +		MXC_ISI_DEBUG_REG(CHNL_Y_BUF2_XTND_ADDR),
> > > > +		MXC_ISI_DEBUG_REG(CHNL_U_BUF2_XTND_ADDR),
> > > > +		MXC_ISI_DEBUG_REG(CHNL_V_BUF2_XTND_ADDR),
> > > > +		MXC_ISI_DEBUG_REG(CHNL_IN_BUF_XTND_ADDR),
> > > 
> > > Those registers only exist in the i.MX8MP. The i.MX8MN referenece manual
> > > lists them as reserved and indicates they read as 0's, so it should be
> > > safe.  The i.MX93 reference manual, however, doesn't list those
> > > registers at all, so accessing them may lead to issues.
> > > 
> > > How what platform(s) have you tested this patch ?
> > 
> > Ah, you are right. That's something I didn't take into account. Up until
> > now I only tested this on i.MX8MP. I hope I can test this on i.MX8MN and
> > i.MX93 soon.
> > Otherwise dumping these registers can depend on pdata->has_36bit_dma just
> > to be safe.
> 
> That sounds like a good solution to me. Will you do so in a v2 ?

Yep, yep just sent it.

Best regards
Alexander

> 
> > > >  	};
> > > >  	
> > > >  	struct mxc_isi_pipe *pipe = m->private;


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