linux-kernel - Re: [PATCH v4 24/25] media:i2c: imx258: Use v4l2_link_freq_to

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Message-ID: <Zh1WlamoDoFbvEMv@tom-HP-ZBook-Fury-15-G7-Mobile-Workstation>
Date: Mon, 15 Apr 2024 18:32:21 +0200
From: Tommaso Merciai <tomm.merciai@...il.com>
To: Luis Garcia <git@...gi311.com>
Cc: linux-media@...r.kernel.org, dave.stevenson@...pberrypi.com,
	jacopo.mondi@...asonboard.com, mchehab@...nel.org, robh@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
	festevam@...il.com, sakari.ailus@...ux.intel.com,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	pavel@....cz, phone-devel@...r.kernel.org
Subject: Re: [PATCH v4 24/25] media:i2c: imx258: Use v4l2_link_freq_to_bitmap
 helper

On Mon, Apr 15, 2024 at 10:27:28AM -0600, Luis Garcia wrote:
> On 4/15/24 09:18, Tommaso Merciai wrote:
> > Hi Luis,
> > 
> > On Sun, Apr 14, 2024 at 02:35:02PM -0600, git@...gi311.com wrote:
> >> From: Luis Garcia <git@...gi311.com>
> >>
> >> Use the v4l2_link_freq_to_bitmap() helper to figure out which
> >> driver-supported link freq can be used on a given system.
> >>
> >> Signed-off-by: Luis Garcia <git@...gi311.com>
> >> Reviewed-by: Pavel Machek <pavel@....cz>
> >> ---
> >>  drivers/media/i2c/imx258.c | 12 ++++++++++++
> >>  1 file changed, 12 insertions(+)
> >>
> >> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> >> index 5de71cb7c1ae..65846dff775e 100644
> >> --- a/drivers/media/i2c/imx258.c
> >> +++ b/drivers/media/i2c/imx258.c
> >> @@ -693,6 +693,7 @@ struct imx258 {
> >>  	/* Current mode */
> >>  	const struct imx258_mode *cur_mode;
> >>  
> >> +	unsigned long link_freq_bitmap;
> >>  	const struct imx258_link_freq_config *link_freq_configs;
> >>  	const s64 *link_freq_menu_items;
> >>  	unsigned int lane_mode_idx;
> >> @@ -1552,6 +1553,17 @@ static int imx258_probe(struct i2c_client *client)
> >>  		return ret;
> >>  	}
> >>  
> >> +	ret = v4l2_link_freq_to_bitmap(&client->dev,
> >> +				       ep.link_frequencies,
> >> +				       ep.nr_of_link_frequencies,
> >> +				       imx258->link_freq_menu_items,
> >> +				       ARRAY_SIZE(link_freq_menu_items_19_2),
> >> +				       &imx258->link_freq_bitmap);
> >> +	if (ret) {
> >> +		dev_err(&client->dev, "Link frequency not supported\n");
> >> +		goto error_endpoint_free;
> >> +	}
> >> +
> >>  	/* Get number of data lanes */
> >>  	switch (ep.bus.mipi_csi2.num_data_lanes) {
> >>  	case 2:
> > 
> > Looks good to me.
> > 
> > ps:
> > Maybe a good plan for the future would be to use: dev_err_probe
> > (instead of dev_err into probe function)
> > 
> > But this I think is somenthing for next improvements. :)
> > 
> > Thanks & Regards,
> > Tommaso
> > 
> 
> Perfect, can i go ahead and add in your reviewed by looks like
> you didnt add it here.

Yep sorry I miss that. :'(

Thanks & Regards,
Tommaso

> 
> >> -- 
> >> 2.44.0
> >>
> >>
>