This is a note to let you know that I've just added the patch titled
ARM: OMAP2+: Fix LCD panel backlight regression for LDP legacy booting
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-omap2-fix-lcd-panel-backlight-regression-for-ldp-legacy-booting.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7e367c18c059c638bf6fb540f1decec18d64cb55 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@xxxxxxxxxxx>
Date: Fri, 27 Dec 2013 09:33:27 -0800
Subject: ARM: OMAP2+: Fix LCD panel backlight regression for LDP legacy booting
From: Tony Lindgren <tony@xxxxxxxxxxx>
commit 7e367c18c059c638bf6fb540f1decec18d64cb55 upstream.
Looks like the LCD panel on LDP has been broken quite a while, and
recently got fixed by commit 0b2aa8bed3e1 (gpio: twl4030: Fix regression
for twl gpio output). However, there's still an issue left where the panel
backlight does not come on if the LCD drivers are built into the
kernel.
Fix the issue by registering the DPI LCD panel only after the twl4030
GPIO has probed.
Reported-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Acked-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
[tony@xxxxxxxxxxx: updated per Tomi's comments]
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/board-ldp.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/arch/arm/mach-omap2/board-ldp.c
+++ b/arch/arm/mach-omap2/board-ldp.c
@@ -243,12 +243,18 @@ static void __init ldp_display_init(void
static int ldp_twl_gpio_setup(struct device *dev, unsigned gpio, unsigned ngpio)
{
+ int res;
+
/* LCD enable GPIO */
ldp_lcd_pdata.enable_gpio = gpio + 7;
/* Backlight enable GPIO */
ldp_lcd_pdata.backlight_gpio = gpio + 15;
+ res = platform_device_register(&ldp_lcd_device);
+ if (res)
+ pr_err("Unable to register LCD: %d\n", res);
+
return 0;
}
@@ -347,7 +353,6 @@ static struct omap2_hsmmc_info mmc[] __i
static struct platform_device *ldp_devices[] __initdata = {
&ldp_gpio_keys_device,
- &ldp_lcd_device,
};
#ifdef CONFIG_OMAP_MUX
Patches currently in stable-queue which might be from tony@xxxxxxxxxxx are
queue-3.12/arm-omap2-fix-lcd-panel-backlight-regression-for-ldp-legacy-booting.patch
queue-3.12/arm-omap2-hwmod_data-fix-missing-omap_intc_start-in-irq-data.patch
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