Re: [PATCH v2 1/1] media: nxp: imx8-isi-debug: Add missing 36-Bit DMA registers to debugfs output

[Alexander Stein <alexander.stein@ew.tq-group.com>]

Hi Laurent,

Am Donnerstag, 7. Dezember 2023, 15:28:45 CET schrieb Laurent Pinchart:
> Hi Alexander,
> 
> On Thu, Dec 07, 2023 at 03:15:10PM +0100, Alexander Stein wrote:
> > Am Donnerstag, 7. Dezember 2023, 14:55:39 CET schrieb Laurent Pinchart:
> > > On Thu, Dec 07, 2023 at 12:09:18PM +0100, Alexander Stein wrote:
> > > > The extended address registers are missing in the debug output
> > > > register
> > > > list. These are only available on 36-Bit DMA platforms. Due to the
> > > > prolonged name, the output width has to be adjusted as well.
> > > > 
> > > > Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> > > > ---
> > > > Changes in v2:
> > > > * Split register set into regular and 36-Bit DMA only
> > > > * Adjust output width to address longer register names
> > > > 
> > > > Currently only tested on TQMa8MPxL (imx8mp-tqma8mpql-mba8mpxl.dts)
> > > > 
> > > >  .../platform/nxp/imx8-isi/imx8-isi-debug.c    | 28
> > > >  +++++++++++++++++--
> > > >  1 file changed, 25 insertions(+), 3 deletions(-)
> > > > 
> > > > 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..398864b5e506 100644
> > > > --- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c
> > > > +++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-debug.c
> > > > @@ -22,10 +22,11 @@ static inline u32 mxc_isi_read(struct mxc_isi_pipe
> > > > *pipe, u32 reg)>
> > > > 
> > > >  static int mxc_isi_debug_dump_regs_show(struct seq_file *m, void *p)
> > > >  {
> > > >  #define MXC_ISI_DEBUG_REG(name)		{ name, #name }
> > > > 
> > > > -	static const struct {
> > > > +	struct debug_regs {
> > > > 
> > > >  		u32 offset;
> > > >  		const char * const name;
> > > > 
> > > > -	} registers[] = {
> > > > +	};
> > > > +	static const struct debug_regs registers[] = {
> > > > 
> > > >  		MXC_ISI_DEBUG_REG(CHNL_CTRL),
> > > >  		MXC_ISI_DEBUG_REG(CHNL_IMG_CTRL),
> > > >  		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF_CTRL),
> > > > 
> > > > @@ -67,6 +68,16 @@ static int mxc_isi_debug_dump_regs_show(struct
> > > > seq_file
> > > > *m, void *p)>
> > > > 
> > > >  		MXC_ISI_DEBUG_REG(CHNL_SCL_IMG_CFG),
> > > >  		MXC_ISI_DEBUG_REG(CHNL_FLOW_CTRL),
> > > >  	
> > > >  	};
> > > > 
> > > > +	/* There registers contain the upper 4Bits of 36-Bit DMA addresses
> > > > */
> > > 
> > > s/There/These/
> > > 
> > > > +	static const struct debug_regs registers_36bit_dma[] = {
> > > > +		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),
> > > > +	};
> > > > 
> > > >  	struct mxc_isi_pipe *pipe = m->private;
> > > >  	unsigned int i;
> > > > 
> > > > @@ -77,10 +88,21 @@ static int mxc_isi_debug_dump_regs_show(struct
> > > > seq_file *m, void *p)>
> > > > 
> > > >  	seq_printf(m, "--- ISI pipe %u registers ---\n", pipe->id);
> > > >  	
> > > >  	for (i = 0; i < ARRAY_SIZE(registers); ++i)
> > > > 
> > > > -		seq_printf(m, "%20s[0x%02x]: 0x%08x\n",
> > > > +		seq_printf(m, "%21s[0x%02x]: 0x%08x\n",
> > > > 
> > > >  			   registers[i].name, registers[i].offset,
> > > >  			   mxc_isi_read(pipe, registers[i].offset));
> > > > 
> > > > +	if (pipe->isi->pdata->has_36bit_dma) {
> > > > +		for (i = 0; i < ARRAY_SIZE(registers_36bit_dma); ++i) {
> > > > +			const struct debug_regs *reg = 
aregisters_36bit_dma[i];
> > > > +
> > > > +			seq_printf(m, "%21s[0x%02x]: 0x%08x\n",
> > > > +				reg->name,
> > > > +				reg->offset,
> > > > +				mxc_isi_read(pipe, reg->offset));
> > > 
> > > Lines should be aligned under the "m" of the first line.
> > > 
> > > I'll fix these small issues when applying, no need to send a v3.
> > > 
> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > 
> > For the records: Also tested on TQMa8MxNL (imx8mn-tqma8mqnl-mba8mx.dts).
> > As
> > expected it prints only the same registers as before.
> 
> Thank you. Can I add
> 
>     Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> # on imx8mn
> 
> ?

Sure, you can add it for imx8mn, imx8mp and imx93 actually.

Best regards,
Alexander

> 
> > > > +		}
> > > > +	}
> > > > +
> > > > 
> > > >  	pm_runtime_put(pipe->isi->dev);
> > > >  	
> > > >  	return 0;


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