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

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Date:   Sun, 5 Mar 2017 15:13:47 +0100
From:   Pavel Machek <pavel@....cz>
To:     Sakari Ailus <sakari.ailus@....fi>
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!

> > 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.

They help a lot. Now I can use similar code paths...

Not yet a mergeable patch, but already better than it was.

Thanks and best regards,
									Pavel


diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
index 24a9fc5..79838bd 100644
--- a/drivers/media/platform/omap3isp/ispccp2.c
+++ b/drivers/media/platform/omap3isp/ispccp2.c
@@ -21,6 +23,7 @@
 #include <linux/mutex.h>
 #include <linux/uaccess.h>
 #include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
 
 #include "isp.h"
 #include "ispreg.h"
@@ -1149,6 +1170,7 @@ int omap3isp_ccp2_init(struct isp_device *isp)
 				"Could not get regulator vdds_csib\n");
 			ccp2->vdds_csib = NULL;
 		}
+		ccp2->phy = &isp->isp_csiphy2;
 	} else if (isp->revision == ISP_REVISION_15_0) {
 		ccp2->phy = &isp->isp_csiphy1;
 	}
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
index 50c0f64..94461df 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -68,8 +68,8 @@ static void csiphy_routing_cfg_3630(struct isp_csiphy *phy,
 	regmap_write(phy->isp->syscon, phy->isp->syscon_offset, reg);
 }
 
-static void csiphy_routing_cfg_3430(struct isp_csiphy *phy, u32 iface, bool on,
-				    bool ccp2_strobe)
+void csiphy_routing_cfg_3430(struct isp_csiphy *phy, u32 iface, bool on,
+			     bool ccp2_strobe, bool strobe_clk_pol)
 {
 	u32 csirxfe = OMAP343X_CONTROL_CSIRXFE_PWRDNZ
 		| OMAP343X_CONTROL_CSIRXFE_RESET;
@@ -85,6 +85,9 @@ static void csiphy_routing_cfg_3430(struct isp_csiphy *phy, u32 iface, bool on,
 
 	if (ccp2_strobe)
 		csirxfe |= OMAP343X_CONTROL_CSIRXFE_SELFORM;
+	
+	if (strobe_clk_pol)
+		csirxfe |= OMAP343X_CONTROL_CSIRXFE_CSIB_INV;
 
 	regmap_write(phy->isp->syscon, phy->isp->syscon_offset, csirxfe);
 }
@@ -108,7 +111,7 @@ static void csiphy_routing_cfg(struct isp_csiphy *phy,
 	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)
-		return csiphy_routing_cfg_3430(phy, iface, on, ccp2_strobe);
+		return csiphy_routing_cfg_3430(phy, iface, on, ccp2_strobe, false);
 }
 
 /*
@@ -197,27 +200,40 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	}
 
 	if (buscfg->interface == ISP_INTERFACE_CCP2B_PHY1
-	    || buscfg->interface == ISP_INTERFACE_CCP2B_PHY2)
+	    || buscfg->interface == ISP_INTERFACE_CCP2B_PHY2) {
 		lanes = &buscfg->bus.ccp2.lanecfg;
-	else
+		phy->num_data_lanes = 1;
+	} else
 		lanes = &buscfg->bus.csi2.lanecfg;
 
+	printk("lane verification... %d\n", phy->num_data_lanes);
+
 	/* Clock and data lanes verification */
 	for (i = 0; i < phy->num_data_lanes; i++) {
-		if (lanes->data[i].pol > 1 || lanes->data[i].pos > 3)
-			return -EINVAL;
+		if (lanes->data[i].pol > 1 || lanes->data[i].pos > 3) {
+			printk("Bad cfg\n");
+			//return -EINVAL;
+		}
 
-		if (used_lanes & (1 << lanes->data[i].pos))
-			return -EINVAL;
+		if (used_lanes & (1 << lanes->data[i].pos)) {
+			printk("Already used\n");
+			//return -EINVAL;
+		}
 
 		used_lanes |= 1 << lanes->data[i].pos;
 	}
 
-	if (lanes->clk.pol > 1 || lanes->clk.pos > 3)
-		return -EINVAL;
+	printk("used lanes... %d\n", used_lanes);	
 
-	if (lanes->clk.pos == 0 || used_lanes & (1 << lanes->clk.pos))
-		return -EINVAL;
+	if (lanes->clk.pol > 1 || lanes->clk.pos > 3) {
+		printk("Bad clock\n");
+		//return -EINVAL;
+	}
+
+	if (lanes->clk.pos == 0 || used_lanes & (1 << lanes->clk.pos)) {
+		printk("Reused clock\n");
+		//return -EINVAL;
+	}
 
 	/*
 	 * The PHY configuration is lost in off mode, that's not an
@@ -302,13 +318,16 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 	if (rval < 0)
 		goto done;
 
-	rval = csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_ON);
-	if (rval) {
-		regulator_disable(phy->vdd);
-		goto done;
+	if (phy->isp->revision == ISP_REVISION_15_0) {
+		rval = csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_ON);
+		if (rval) {
+			regulator_disable(phy->vdd);
+			goto done;
+		}
+		
+		csiphy_power_autoswitch_enable(phy, true);		
 	}
 
-	csiphy_power_autoswitch_enable(phy, true);
 	phy->phy_in_use = 1;
 
 done:

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

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