linux-kernel - Re: [PATCHv2] omap3isp: add support for CSI1 bus

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Date:   Wed, 3 May 2017 10:43:37 +0300
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Pavel Machek <pavel@....cz>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        mchehab@...nel.org, kernel list <linux-kernel@...r.kernel.org>,
        ivo.g.dimitrov.75@...il.com, sre@...nel.org, pali.rohar@...il.com,
        linux-media@...r.kernel.org
Subject: Re: [PATCHv2] omap3isp: add support for CSI1 bus

Hi Pavel,

On 03/04/17 15:03, Sakari Ailus wrote:
> Hi Pavel,
> 
> On Thu, Mar 02, 2017 at 01:38:48PM +0100, Pavel Machek wrote:
>> Hi!
>>
>>>> Ok, how about this one?
>>>> omap3isp: add rest of CSI1 support
>>>>     
>>>> CSI1 needs one more bit to be set up. Do just that.
>>>>     
>>>> It is not as straightforward as I'd like, see the comments in the code
>>>> for explanation.
>> ...
>>>> +	if (isp->phy_type == ISP_PHY_TYPE_3430) {
>>>> +		struct media_pad *pad;
>>>> +		struct v4l2_subdev *sensor;
>>>> +		const struct isp_ccp2_cfg *buscfg;
>>>> +
>>>> +		pad = media_entity_remote_pad(&ccp2->pads[CCP2_PAD_SINK]);
>>>> +		sensor = media_entity_to_v4l2_subdev(pad->entity);
>>>> +		/* Struct isp_bus_cfg has union inside */
>>>> +		buscfg = &((struct isp_bus_cfg *)sensor->host_priv)->bus.ccp2;
>>>> +
>>>> +		csiphy_routing_cfg_3430(&isp->isp_csiphy2,
>>>> +					ISP_INTERFACE_CCP2B_PHY1,
>>>> +					enable, !!buscfg->phy_layer,
>>>> +					buscfg->strobe_clk_pol);
>>>
>>> You should do this through omap3isp_csiphy_acquire(), and not call
>>> csiphy_routing_cfg_3430() directly from here.
>>
>> Well, unfortunately omap3isp_csiphy_acquire() does have csi2
>> assumptions hard-coded :-(.
>>
>> This will probably fail.
>>
>> 	        rval = omap3isp_csi2_reset(phy->csi2);
>> 	        if (rval < 0)
>> 		                goto done;
> 
> Could you try to two patches I've applied on the ccp2 branch (I'll remove
> them if there are issues).
> 
> That's compile tested for now only.
> 

I've updated the CCP2 patches here on top of the latest fwnode patches:

<URL:https://git.linuxtv.org/sailus/media_tree.git/log/?h=ccp2>

No even compile testing this time though. I'm afraid I haven't had the
time to otherwise to work on the CCP2 support, so there are no other
changes besides the rebase.

I intend to send a pull request for the fwnode patches once we have the
next rc1 in media tree so then we can have the patches on plain media
tree master branch.

-- 
Regards,

Sakari Ailus
e-mail: sakari.ailus@....fi     XMPP: sailus@...iisi.org.uk