Re: [PATCH 1/3] omap3isp: Defer probing when subdev isn't available

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Laurent -

Agreed. This is a stop gap for this, but I guess by the time this patch could possibly get incorporated we'd be off to device tree anyways.

- Tim

(Sorry for the repeat - my e-mail client sent out an HTML message so it didn't get through to the mailing list.)

On 03/18/15 10:15, Laurent Pinchart wrote:
Hi Tim,

Thank you for the patch.

The OMAP3 ISP driver is moving to DT, hopefully in time for v4.1. See "[PATCH
00/15] omap3isp driver DT support" posted to the list on Monday. I'd rather go
for proper DT support instead of custom deferred probing.

On Tuesday 10 March 2015 14:24:52 Tim Nordell wrote:
If the subdev isn't available just yet, defer probing of
the system.  This is useful if the omap3isp comes up before
the I2C subsystem does.

Signed-off-by: Tim Nordell <tim.nordell@xxxxxxxxxxx>
---
  drivers/media/platform/omap3isp/isp.c | 6 +++++-
  1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/omap3isp/isp.c
b/drivers/media/platform/omap3isp/isp.c index 51c2129..a361c40 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -1811,7 +1811,7 @@ isp_register_subdev_group(struct isp_device *isp,
  				"device %s\n", __func__,
  				board_info->i2c_adapter_id,
  				board_info->board_info->type);
-			continue;
+			return ERR_PTR(-EPROBE_DEFER);
  		}

  		subdev = v4l2_i2c_new_subdev_board(&isp->v4l2_dev, adapter,
@@ -1898,6 +1898,10 @@ static int isp_register_entities(struct isp_device
*isp) unsigned int i;

  		sensor = isp_register_subdev_group(isp, subdevs->subdevs);
+		if (IS_ERR(sensor)) {
+			ret = PTR_ERR(sensor);
+			goto done;
+		}
  		if (sensor == NULL)
  			continue;
--
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