diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1295-This-patch-adds-a-framebuffer-notifier-in-order-to-d.patch')
| -rw-r--r-- | target/linux/s3c24xx/patches-2.6.24/1295-This-patch-adds-a-framebuffer-notifier-in-order-to-d.patch | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1295-This-patch-adds-a-framebuffer-notifier-in-order-to-d.patch b/target/linux/s3c24xx/patches-2.6.24/1295-This-patch-adds-a-framebuffer-notifier-in-order-to-d.patch deleted file mode 100644 index f698c82..0000000 --- a/target/linux/s3c24xx/patches-2.6.24/1295-This-patch-adds-a-framebuffer-notifier-in-order-to-d.patch +++ /dev/null @@ -1,120 +0,0 @@ -From 9aa87d67df2e59eea15f70c4e58f8bde10e5953b Mon Sep 17 00:00:00 2001 -From: Harald Welte <laforge@openmoko.org> -Date: Wed, 8 Oct 2008 11:13:46 +0100 -Subject: [PATCH] This patch adds a framebuffer notifier in order to detect - FB_BLANK events and switch the JBT6K74 LCM controller into - its power saving mode. - -This has the potential of saving something like 50mW during screen blank. - -Signed-off-by: Harald Welte <laforge@openmoko.org> ---- - drivers/video/display/jbt6k74.c | 48 +++++++++++++++++++++++++++++++++++++++ - 1 files changed, 48 insertions(+), 0 deletions(-) - -diff --git a/drivers/video/display/jbt6k74.c b/drivers/video/display/jbt6k74.c -index b406298..9570543 100644 ---- a/drivers/video/display/jbt6k74.c -+++ b/drivers/video/display/jbt6k74.c -@@ -3,6 +3,7 @@ - * Copyright (C) 2006-2007 by Openmoko, Inc. - * Author: Harald Welte <laforge@openmoko.org>, - * Stefan Schmidt <stefan@openmoko.org> -+ * Copyright (C) 2008 by Harald Welte <laforge@openmoko.org> - * All rights reserved. - * - * This program is free software; you can redistribute it and/or -@@ -21,6 +22,7 @@ - * MA 02111-1307 USA - * - */ -+ - #include <linux/kernel.h> - #include <linux/types.h> - #include <linux/module.h> -@@ -28,6 +30,7 @@ - #include <linux/platform_device.h> - #include <linux/delay.h> - #include <linux/jbt6k74.h> -+#include <linux/fb.h> - - enum jbt_register { - JBT_REG_SLEEP_IN = 0x10, -@@ -111,6 +114,7 @@ struct jbt_info { - enum jbt_state state, last_state; - struct spi_device *spi_dev; - struct mutex lock; /* protects tx_buf and reg_cache */ -+ struct notifier_block fb_notif; - u16 tx_buf[8]; - u16 reg_cache[0xEE]; - int have_resumed; -@@ -548,6 +552,40 @@ static struct attribute_group jbt_attr_group = { - .attrs = jbt_sysfs_entries, - }; - -+static int fb_notifier_callback(struct notifier_block *self, -+ unsigned long event, void *data) -+{ -+ struct jbt_info *jbt; -+ struct fb_event *evdata = data; -+ int fb_blank; -+ -+ if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK) -+ return 0; -+ -+ fb_blank = *(int *)evdata->data; -+ jbt = container_of(self, struct jbt_info, fb_notif); -+ -+ switch (fb_blank) { -+ case FB_BLANK_UNBLANK: -+ case FB_BLANK_NORMAL: -+ jbt6k74_enter_state(jbt, JBT_STATE_NORMAL); -+ jbt6k74_display_onoff(jbt, 1); -+ break; -+ case FB_BLANK_VSYNC_SUSPEND: -+ case FB_BLANK_HSYNC_SUSPEND: -+ /* FIXME: we disable SLEEP since it would result in -+ * a visible artefact (white screen) before the backlight -+ * is dimmed to a dark enough level */ -+ /* jbt6k74_enter_state(jbt, JBT_STATE_SLEEP); */ -+ break; -+ case FB_BLANK_POWERDOWN: -+ jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY); -+ break; -+ } -+ -+ return 0; -+} -+ - /* linux device model infrastructure */ - - static int __devinit jbt_probe(struct spi_device *spi) -@@ -595,8 +633,17 @@ static int __devinit jbt_probe(struct spi_device *spi) - goto err_off; - } - -+ jbt->fb_notif.notifier_call = fb_notifier_callback; -+ rc = fb_register_client(&jbt->fb_notif); -+ if (rc < 0) { -+ dev_err(&spi->dev, "cannot register notifier\n"); -+ goto err_sysfs; -+ } -+ - return 0; - -+err_sysfs: -+ sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group); - err_off: - jbt6k74_display_onoff(jbt, 0); - err_standby: -@@ -615,6 +662,7 @@ static int __devexit jbt_remove(struct spi_device *spi) - /* We don't want to switch off the display in case the user - * accidentially onloads the module (whose use count normally is 0) */ - -+ fb_unregister_client(&jbt->fb_notif); - sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group); - dev_set_drvdata(&spi->dev, NULL); - kfree(jbt); --- -1.5.6.5 - |