diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0244-fix-suspend-backlight-timing-gta01.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0244-fix-suspend-backlight-timing-gta01.patch.patch | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0244-fix-suspend-backlight-timing-gta01.patch.patch b/target/linux/s3c24xx/patches/0244-fix-suspend-backlight-timing-gta01.patch.patch new file mode 100755 index 0000000000..1349820954 --- /dev/null +++ b/target/linux/s3c24xx/patches/0244-fix-suspend-backlight-timing-gta01.patch.patch @@ -0,0 +1,123 @@ +From 26a1d7115299dcb17a9e9effc780ceba58afa91b Mon Sep 17 00:00:00 2001 +From: Mike Westerhof <mwester@dls.net> +Date: Sun, 10 Aug 2008 09:13:46 +0100 +Subject: [PATCH] fix-suspend-backlight-timing-gta01.patch + + This patch adds the gta01 backlight callback that defers the + restoring of the backlight until after the jbt driver has + resumed. This doesn't eliminate the flashing of the LCD on + the gta01, but it reduces it considerably. + +Signed-off-by: Mike Westerhof <mwester@dls.net> +--- + arch/arm/mach-s3c2410/mach-gta01.c | 9 ++++++++- + drivers/video/backlight/gta01_bl.c | 15 ++++++++++++++- + include/asm-arm/arch-s3c2410/gta01.h | 4 ++++ + 3 files changed, 26 insertions(+), 2 deletions(-) + +diff --git a/arch/arm/mach-s3c2410/mach-gta01.c b/arch/arm/mach-s3c2410/mach-gta01.c +index f3f87cf..9e42df0 100644 +--- a/arch/arm/mach-s3c2410/mach-gta01.c ++++ b/arch/arm/mach-s3c2410/mach-gta01.c +@@ -507,14 +507,20 @@ static struct s3c2410_ts_mach_info gta01_ts_cfg = { + + /* SPI */ + +-void gta01_jbt6k74_reset(int devidx, int level) ++static void gta01_jbt6k74_reset(int devidx, int level) + { + /* empty place holder; gta01 does not yet use this */ + printk(KERN_DEBUG "gta01_jbt6k74_reset\n"); + } + ++static void gta01_jbt6k74_resuming(int devidx) ++{ ++ gta01bl_deferred_resume(); ++} ++ + const struct jbt6k74_platform_data gta01_jbt6k74_pdata = { + .reset = gta01_jbt6k74_reset, ++ .resuming = gta01_jbt6k74_resuming, + }; + + static struct spi_board_info gta01_spi_board_info[] = { +@@ -584,6 +590,7 @@ static struct gta01bl_machinfo backlight_machinfo = { + .default_intensity = 1, + .max_intensity = 1, + .limit_mask = 1, ++ .defer_resume_backlight = 1, + }; + + static struct resource gta01_bl_resources[] = { +diff --git a/drivers/video/backlight/gta01_bl.c b/drivers/video/backlight/gta01_bl.c +index 301ec9c..34c19c8 100644 +--- a/drivers/video/backlight/gta01_bl.c ++++ b/drivers/video/backlight/gta01_bl.c +@@ -57,6 +57,8 @@ struct gta01bl_data { + + static struct gta01bl_data gta01bl; + ++static int gta01bl_defer_resume_backlight; ++ + #define GTA01BL_SUSPENDED 0x01 + #define GTA01BL_BATTLOW 0x02 + +@@ -132,10 +134,12 @@ static int gta01bl_suspend(struct platform_device *dev, pm_message_t state) + { + gta01bl_flags |= GTA01BL_SUSPENDED; + gta01bl_send_intensity(gta01_backlight_device); ++ neo1973_gpb_setpin(GTA01_GPIO_BACKLIGHT, 0); ++ s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT); + return 0; + } + +-static int gta01bl_resume(struct platform_device *dev) ++void gta01bl_deferred_resume(void) + { + mutex_lock(>a01bl.mutex); + gta01bl_init_hw(); +@@ -143,6 +147,13 @@ static int gta01bl_resume(struct platform_device *dev) + + gta01bl_flags &= ~GTA01BL_SUSPENDED; + gta01bl_send_intensity(gta01_backlight_device); ++} ++EXPORT_SYMBOL_GPL(gta01bl_deferred_resume); ++ ++static int gta01bl_resume(struct platform_device *dev) ++{ ++ if (! gta01bl_defer_resume_backlight) ++ gta01bl_deferred_resume(); + return 0; + } + #else +@@ -199,6 +210,8 @@ static int __init gta01bl_probe(struct platform_device *pdev) + if (!machinfo->limit_mask) + machinfo->limit_mask = -1; + ++ gta01bl_defer_resume_backlight = machinfo->defer_resume_backlight; ++ + gta01_backlight_device = backlight_device_register("gta01-bl", + &pdev->dev, NULL, + >a01bl_ops); +diff --git a/include/asm-arm/arch-s3c2410/gta01.h b/include/asm-arm/arch-s3c2410/gta01.h +index 1cc2099..989aa55 100644 +--- a/include/asm-arm/arch-s3c2410/gta01.h ++++ b/include/asm-arm/arch-s3c2410/gta01.h +@@ -12,10 +12,14 @@ + #define GTA01Bv4_SYSTEM_REV 0x00000240 + + /* Backlight */ ++ ++extern void gta01bl_deferred_resume(void); ++ + struct gta01bl_machinfo { + unsigned int default_intensity; + unsigned int max_intensity; + unsigned int limit_mask; ++ unsigned int defer_resume_backlight; + }; + + /* Definitions common to all revisions */ +-- +1.5.6.3 + |