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124 lines
3.8 KiB
Diff
124 lines
3.8 KiB
Diff
From 26a1d7115299dcb17a9e9effc780ceba58afa91b Mon Sep 17 00:00:00 2001
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From: Mike Westerhof <mwester@dls.net>
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Date: Sun, 10 Aug 2008 09:13:46 +0100
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Subject: [PATCH] fix-suspend-backlight-timing-gta01.patch
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This patch adds the gta01 backlight callback that defers the
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restoring of the backlight until after the jbt driver has
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resumed. This doesn't eliminate the flashing of the LCD on
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the gta01, but it reduces it considerably.
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Signed-off-by: Mike Westerhof <mwester@dls.net>
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---
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arch/arm/mach-s3c2410/mach-gta01.c | 9 ++++++++-
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drivers/video/backlight/gta01_bl.c | 15 ++++++++++++++-
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include/asm-arm/arch-s3c2410/gta01.h | 4 ++++
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3 files changed, 26 insertions(+), 2 deletions(-)
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diff --git a/arch/arm/mach-s3c2410/mach-gta01.c b/arch/arm/mach-s3c2410/mach-gta01.c
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index f3f87cf..9e42df0 100644
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--- a/arch/arm/mach-s3c2410/mach-gta01.c
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+++ b/arch/arm/mach-s3c2410/mach-gta01.c
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@@ -507,14 +507,20 @@ static struct s3c2410_ts_mach_info gta01_ts_cfg = {
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/* SPI */
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-void gta01_jbt6k74_reset(int devidx, int level)
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+static void gta01_jbt6k74_reset(int devidx, int level)
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{
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/* empty place holder; gta01 does not yet use this */
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printk(KERN_DEBUG "gta01_jbt6k74_reset\n");
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}
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+static void gta01_jbt6k74_resuming(int devidx)
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+{
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+ gta01bl_deferred_resume();
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+}
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+
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const struct jbt6k74_platform_data gta01_jbt6k74_pdata = {
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.reset = gta01_jbt6k74_reset,
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+ .resuming = gta01_jbt6k74_resuming,
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};
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static struct spi_board_info gta01_spi_board_info[] = {
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@@ -584,6 +590,7 @@ static struct gta01bl_machinfo backlight_machinfo = {
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.default_intensity = 1,
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.max_intensity = 1,
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.limit_mask = 1,
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+ .defer_resume_backlight = 1,
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};
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static struct resource gta01_bl_resources[] = {
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diff --git a/drivers/video/backlight/gta01_bl.c b/drivers/video/backlight/gta01_bl.c
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index 301ec9c..34c19c8 100644
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--- a/drivers/video/backlight/gta01_bl.c
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+++ b/drivers/video/backlight/gta01_bl.c
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@@ -57,6 +57,8 @@ struct gta01bl_data {
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static struct gta01bl_data gta01bl;
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+static int gta01bl_defer_resume_backlight;
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+
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#define GTA01BL_SUSPENDED 0x01
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#define GTA01BL_BATTLOW 0x02
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@@ -132,10 +134,12 @@ static int gta01bl_suspend(struct platform_device *dev, pm_message_t state)
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{
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gta01bl_flags |= GTA01BL_SUSPENDED;
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gta01bl_send_intensity(gta01_backlight_device);
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+ neo1973_gpb_setpin(GTA01_GPIO_BACKLIGHT, 0);
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+ s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT);
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return 0;
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}
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-static int gta01bl_resume(struct platform_device *dev)
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+void gta01bl_deferred_resume(void)
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{
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mutex_lock(>a01bl.mutex);
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gta01bl_init_hw();
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@@ -143,6 +147,13 @@ static int gta01bl_resume(struct platform_device *dev)
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gta01bl_flags &= ~GTA01BL_SUSPENDED;
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gta01bl_send_intensity(gta01_backlight_device);
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+}
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+EXPORT_SYMBOL_GPL(gta01bl_deferred_resume);
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+
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+static int gta01bl_resume(struct platform_device *dev)
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+{
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+ if (! gta01bl_defer_resume_backlight)
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+ gta01bl_deferred_resume();
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return 0;
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}
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#else
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@@ -199,6 +210,8 @@ static int __init gta01bl_probe(struct platform_device *pdev)
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if (!machinfo->limit_mask)
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machinfo->limit_mask = -1;
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+ gta01bl_defer_resume_backlight = machinfo->defer_resume_backlight;
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+
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gta01_backlight_device = backlight_device_register("gta01-bl",
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&pdev->dev, NULL,
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>a01bl_ops);
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diff --git a/include/asm-arm/arch-s3c2410/gta01.h b/include/asm-arm/arch-s3c2410/gta01.h
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index 1cc2099..989aa55 100644
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--- a/include/asm-arm/arch-s3c2410/gta01.h
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+++ b/include/asm-arm/arch-s3c2410/gta01.h
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@@ -12,10 +12,14 @@
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#define GTA01Bv4_SYSTEM_REV 0x00000240
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/* Backlight */
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+
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+extern void gta01bl_deferred_resume(void);
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+
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struct gta01bl_machinfo {
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unsigned int default_intensity;
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unsigned int max_intensity;
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unsigned int limit_mask;
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+ unsigned int defer_resume_backlight;
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};
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/* Definitions common to all revisions */
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--
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1.5.6.3
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