linux-kernel - [PATCH 3.12 088/182] video: atmel_lcdfb: ensure the hardware is initialized with the correct mode

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Message-Id: <c3552f715cd1b5eb287956dd80f6d04e043e5d6c.1399973152.git.jslaby@suse.cz>
Date:	Tue, 13 May 2014 11:27:20 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 088/182] video: atmel_lcdfb: ensure the hardware is initialized with the correct mode

From: Antoine Ténart <antoine.tenart@...e-electrons.com>

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

===============

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: Jiri Slaby <jslaby@...e.cz>
---
 drivers/video/atmel_lcdfb.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 088511a58a26..0aca4e6b2871 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -1081,6 +1081,12 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
 		goto free_cmap;
 	}
 
+	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);
 
 	/*
-- 
1.9.3

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