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

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Message-ID: <20170215102301.GA29330@amd>
Date:   Wed, 15 Feb 2017 11:23:01 +0100
From:   Pavel Machek <pavel@....cz>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Sakari Ailus <sakari.ailus@....fi>, 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: [PATCH] omap3isp: add support for CSI1 bus

Hi!

> > +		if (enable) {
> > +			csirxfe = OMAP343X_CONTROL_CSIRXFE_PWRDNZ |
> > +				  OMAP343X_CONTROL_CSIRXFE_RESET;
> > +
> > +			if (buscfg->phy_layer)
> > +				csirxfe |= OMAP343X_CONTROL_CSIRXFE_SELFORM;
> > +
> > +			if (buscfg->strobe_clk_pol)
> > +				csirxfe |= OMAP343X_CONTROL_CSIRXFE_CSIB_INV;
> > +		} else
> > +			csirxfe = 0;
> 
> You need curly braces for the else statement too.
> 
> > +
> > +		regmap_write(isp->syscon, isp->syscon_offset, csirxfe);
> 
> Isn't this already configured by csiphy_routing_cfg_3430(), called through 
> omap3isp_csiphy_acquire() ? You'll need to add support for the strobe/clock 
> polarity there, but the rest should already be handled.

It seems csiphy_routing_cfg_3430 is not called at all. I added
printks, but they don't trigger. If you have an idea what is going on
there, it would help...
									Pavel

diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
index 6b814e1..fe9303a 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -30,6 +30,8 @@ static void csiphy_routing_cfg_3630(struct isp_csiphy *phy,
 	u32 reg;
 	u32 shift, mode;
 
+	printk("routing cfg 3630: iface %d, %d\n", iface, ISP_INTERFACE_CCP2B_PHY1);
+	
 	regmap_read(phy->isp->syscon, phy->isp->syscon_offset, &reg);
 
 	switch (iface) {
@@ -74,6 +76,9 @@ static void csiphy_routing_cfg_3430(struct isp_csiphy *phy, u32 iface, bool on,
 	u32 csirxfe = OMAP343X_CONTROL_CSIRXFE_PWRDNZ
 		| OMAP343X_CONTROL_CSIRXFE_RESET;
 
+	/* FIXME: can this be used instead of if (isp->revision) in ispccp2.c? */
+	
+	printk("routing cfg: iface %d, %d\n", iface, ISP_INTERFACE_CCP2B_PHY1);
 	/* Only the CCP2B on PHY1 is configurable. */
 	if (iface != ISP_INTERFACE_CCP2B_PHY1)
 		return;
@@ -105,6 +110,7 @@ static void csiphy_routing_cfg(struct isp_csiphy *phy,
 			       enum isp_interface_type iface, bool on,
 			       bool ccp2_strobe)
 {
+	printk("csiphy_routing_cfg\n");
 	if (phy->isp->phy_type == ISP_PHY_TYPE_3630 && on)
 		return csiphy_routing_cfg_3630(phy, iface, ccp2_strobe);
 	if (phy->isp->phy_type == ISP_PHY_TYPE_3430)



-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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