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drm: rcar-du: Add probe deferral debug messages 

Print a message when the HDMI I2C slave encoder can't be found to help
debugging probe deferral issues.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2015-10-22 01:09:30 +03:00
parent 6bc2e15cf2
commit fee8abc3bc
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c
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@ -131,12 +131,19 @@ int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
/* Locate the slave I2C device and driver. */
i2c_slave = of_find_i2c_device_by_node(np);
if (!i2c_slave || !i2c_get_clientdata(i2c_slave))
if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) {
dev_dbg(rcdu->dev,
"can't get I2C slave for %s, deferring probe\n",
of_node_full_name(np));
return -EPROBE_DEFER;
}
hdmienc->dev = &i2c_slave->dev;
if (hdmienc->dev->driver == NULL) {
dev_dbg(rcdu->dev,
"I2C slave %s not probed yet, deferring probe\n",
dev_name(hdmienc->dev));
ret = -EPROBE_DEFER;
goto error;
}