linux-kernel - [PATCH 3.14 112/158] video: atmel_lcdfb: ensure the hardware is initialized with the correct mode

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Date:	Sun,  4 May 2014 11:40:21 -0400
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>
Subject: [PATCH 3.14 112/158] video: atmel_lcdfb: ensure the hardware is initialized with the correct mode

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Antoine=20T=C3=A9nart?= <antoine.tenart@...e-electrons.com>

commit 7d3477d801808a5037a511cf5a5aae5718e7ecce upstream.

If no driver takeover the atmel_lcdfb, the lcd won't be in a working state
since atmel_lcdfb_set_par() will never be called. Enabling a driver which does,
like fbcon, will call the function and put atmel_lcdfb in a working state.

Fixes: b985172b328a (video: atmel_lcdfb: add device tree suport)

Signed-off-by: Antoine Ténart <antoine.tenart@...e-electrons.com>
Reported-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/video/atmel_lcdfb.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -1298,6 +1298,12 @@ static int __init atmel_lcdfb_probe(stru
 		goto unregister_irqs;
 	}
 
+	ret = atmel_lcdfb_set_par(info);
+	if (ret < 0) {
+		dev_err(dev, "set par failed: %d\n", ret);
+		goto unregister_irqs;
+	}
+
 	dev_set_drvdata(dev, info);
 
 	/*


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