Re: v4l2-fwnode: status, plans for merge, any branch to merge against?

[Pavel Machek <pavel@ucw.cz>]

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Hi!

> > > > > I expect to have most of them in during the next merge window.
> > > > 
> > > > So git://linuxtv.org/media_tree.git branch master is the right one to
> > > > work one?
> > > 
> > > I also pushed the rebased ccp2 branch there:
> > > 
> > > <URL:https://git.linuxtv.org/sailus/media_tree.git/log/?h=ccp2>
> > > 
> > > It's now right on the top of media-tree master.
> > 
> > Is ccp2 branch expected to go into 4.13, too?
> 
> Hi Pavel,
> 
> What I've done is just rebased the ccp2 branch. In other words, the patches
> in that branch are no more ready than they were.

I thought they were ready even back then :-).

> To get these merged we should ideally
> 
> 1) Make sure there will be no regressions,

Well, all I have running recent kernels is N900. If ccp branch works
for you on N9, that's probably as much testing as we can get.

> 2) clean things up in the omap3isp; which resources are needed and when
> (e.g. regulators, PHY configuration) isn't clear at the moment and
> 
> 2) have one driver using the implementation.
> 
> At least 1) is needed. I think a number of framework patches could be
> mergeable before 2) and 3) are done. I can prepare a set later this week.
> But even that'd be likely for 4.14, not 4.13.

Yep, it is too late for v4.13 now. But getting stuff ready for v4.14
would be good.

I started looking through the patches; I believe they are safe, but it
is probably better to review the series you've just mailed.

The driver using the implementation -- yes, I have it all working on
n900 (incuding userland, I can actually take photos.) I can post the
series, or better link to kernel.org.

Right now, my goal would be to get sensor working on N900 with
mainline (without flash and focus).

I'd very much like any comment on patch attached below.

Age   Commit message (Expand)	Author	Files	Lines
2017-06-16   omap3isp: Destroy CSI-2 phy mutexes in error and module
2017-06-16	omap3isp: Skip CSI-2 receiver initialisation in CCP2
2017-06-16	omap3isp: Correctly put the last iterated endpoint
2017-06-16	omap3isp: Always initialise isp and mutex for csiphy1
2017-06-16	omap3isp: Return -EPROBE_DEFER if the required
2017-06-16 omap3isp: Correctly set IO_OUT_SEL and VP_CLK_POL for CCP2
2017-06-16    omap3isp: Make external sub-device bus configuration a
2017-06-15    omap3isp: Parse CSI1 configuration from the device tree
2017-06-15    omap3isp: Check for valid port in endpoints	Sakari
2017-06-15	omap3isp: Ignore endpoints with invalid configuration

# Nothing changes for bus_type == V4L2_MBUS_CSI2. FIXME: Is bus_type
  set correctly?

2017-06-15	smiapp: add CCP2 support	Pavel Machek	1

# bus_type will be guess, so no code changes on existing system:

2017-06-15	v4l: Add support for CSI-1 and CCP2 busses	Sakari

# Reads unused value -> can't break anything:

2017-06-13	v4l: fwnode: Obtain data bus type from FW	Sakari

# No code changes -> totally safe:

2017-06-13	v4l: fwnode: Call CSI2 bus csi2, not csi	Sakari
2017-06-13	dt: bindings: Add strobe property for CCP2	Sakari
2017-06-13	dt: bindings: Explicitly specify bus type

Best regards,
								Pavel

commit 1220492dd4c1872c8036caa573680f95aabc69bc
Author: Pavel <pavel@ucw.cz>
Date:   Tue Feb 28 12:02:26 2017 +0100

    omap3isp: add CSI1 support
    
    Use proper code path for csi1/ccp2 support.
    
    Signed-off-by: Pavel Machek <pavel@ucw.cz>

diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
index 24a9fc5..47210b1 100644
--- a/drivers/media/platform/omap3isp/ispccp2.c
+++ b/drivers/media/platform/omap3isp/ispccp2.c
@@ -1149,6 +1149,7 @@ 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..862fdd3 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -197,9 +197,10 @@ 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;
 
 	/* Clock and data lanes verification */
@@ -302,13 +303,16 @@ 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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