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git://projects.qi-hardware.com/openwrt-xburst.git
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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13619 3c298f89-4303-0410-b956-a3cf2f4a3e73
270 lines
9.3 KiB
Diff
Executable File
270 lines
9.3 KiB
Diff
Executable File
From 36b19597a232bb198b3bab4003c0f0807c821274 Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Fri, 25 Jul 2008 23:06:08 +0100
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Subject: [PATCH] fix-suspend-backlight-timing-pm-debug.patch
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This patch improves the smoothness of suspend and resume action.
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Taking out CONFIG_PM_DEBUG allows much more rapid resume (the low level
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serial traffic appears to be synchronous)
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Added a platform callback in jbt driver and support in pcf50633 so we
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can defer bringing up the backlight until the LCM is able to process
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video again (which must happen after the glamo is up and producing
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video beacuse the LCM is hooked to glamo SPI)
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GTA01 should not be affected by all this as the callback will default
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to null and it is on pcf50606
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/mach-s3c2440/mach-gta02.c | 8 ++++++
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defconfig-2.6.24 | 4 +-
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drivers/i2c/chips/pcf50633.c | 50 ++++++++++++++++++++++++++---------
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drivers/video/display/jbt6k74.c | 12 ++++++++-
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include/linux/jbt6k74.h | 3 +-
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include/linux/pcf50633.h | 6 ++++
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6 files changed, 66 insertions(+), 17 deletions(-)
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index 1954121..e1984a9 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -532,6 +532,7 @@ static struct pcf50633_platform_data gta02_pcf_pdata = {
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},
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},
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},
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+ .defer_resume_backlight = 1,
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};
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#if 0 /* currently unused */
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@@ -828,9 +829,16 @@ void gta02_jbt6k74_reset(int devidx, int level)
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glamo_lcm_reset(level);
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}
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+/* finally bring up deferred backlight resume now LCM is resumed itself */
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+
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+void gta02_jbt6k74_resuming(int devidx)
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+{
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+ pcf50633_backlight_resume(pcf50633_global);
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+}
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const struct jbt6k74_platform_data jbt6k74_pdata = {
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.reset = gta02_jbt6k74_reset,
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+ .resuming = gta02_jbt6k74_resuming,
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};
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static struct spi_board_info gta02_spi_board_info[] = {
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diff --git a/defconfig-2.6.24 b/defconfig-2.6.24
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index 4df10bf..34fa961 100644
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--- a/defconfig-2.6.24
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+++ b/defconfig-2.6.24
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@@ -161,7 +161,7 @@ CONFIG_CPU_LLSERIAL_S3C2440=y
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#
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# Power management
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#
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-CONFIG_S3C2410_PM_DEBUG=y
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+# CONFIG_S3C2410_PM_DEBUG is not set
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# CONFIG_S3C2410_PM_CHECK is not set
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CONFIG_S3C_LOWLEVEL_UART_PORT=2
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@@ -1754,7 +1754,7 @@ CONFIG_FORCED_INLINING=y
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# CONFIG_SAMPLES is not set
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# CONFIG_DEBUG_USER is not set
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CONFIG_DEBUG_ERRORS=y
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-CONFIG_DEBUG_LL=y
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+# CONFIG_DEBUG_LL is not set
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# CONFIG_DEBUG_ICEDCC is not set
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# CONFIG_DEBUG_S3C_PORT is not set
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CONFIG_DEBUG_S3C_UART=2
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diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
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index cb4cad8..da58aa3 100644
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--- a/drivers/i2c/chips/pcf50633.c
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+++ b/drivers/i2c/chips/pcf50633.c
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@@ -1466,7 +1466,7 @@ static int pcf50633bl_set_intensity(struct backlight_device *bd)
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struct pcf50633_data *pcf = bl_get_data(bd);
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int intensity = bd->props.brightness;
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int old_intensity = reg_read(pcf, PCF50633_REG_LEDOUT);
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- u_int8_t ledena;
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+ u_int8_t ledena = 2;
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int ret;
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if (bd->props.power != FB_BLANK_UNBLANK)
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@@ -1474,16 +1474,19 @@ static int pcf50633bl_set_intensity(struct backlight_device *bd)
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if (bd->props.fb_blank != FB_BLANK_UNBLANK)
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intensity = 0;
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- /* The PCF50633 seems to have some kind of oddity (bug?) when
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- * the intensity was 0, you need to completely switch it off
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- * and re-enable it, before it produces any output voltage again */
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+ /* The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
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+ * if seen, you have to re-enable the LED unit
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+ */
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if (intensity != 0 && old_intensity == 0) {
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ledena = reg_read(pcf, PCF50633_REG_LEDENA);
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reg_write(pcf, PCF50633_REG_LEDENA, 0x00);
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}
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- ret = reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
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+ if (!intensity) /* illegal to set LEDOUT to 0 */
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+ ret = reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
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+ else
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+ ret = reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
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intensity);
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if (intensity != 0 && old_intensity == 0)
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@@ -1920,6 +1923,8 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
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}
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/* turn off the backlight */
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+ __reg_write(pcf, PCF50633_REG_LEDDIM, 0);
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+ __reg_write(pcf, PCF50633_REG_LEDOUT, 2);
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__reg_write(pcf, PCF50633_REG_LEDENA, 0x00);
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pcf->standby_regs.int1m = __reg_read(pcf, PCF50633_REG_INT1M);
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@@ -1938,17 +1943,30 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
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return 0;
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}
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+/*
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+ * if backlight resume is selected to be deferred by platform, then it
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+ * can call this to finally reset backlight status (after LCM is resumed
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+ * for example
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+ */
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+
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+void pcf50633_backlight_resume(struct pcf50633_data *pcf)
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+{
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+ __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.ledout);
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+ __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.ledena);
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+ __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.leddim);
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+}
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+EXPORT_SYMBOL_GPL(pcf50633_backlight_resume);
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+
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+
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static int pcf50633_resume(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct pcf50633_data *pcf = i2c_get_clientdata(client);
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int i;
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- printk(KERN_INFO"a\n");
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/* mutex_lock(&pcf->lock); */ /* resume in atomic context */
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__reg_write(pcf, PCF50633_REG_LEDENA, 0x01);
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- printk(KERN_INFO"b\n");
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/* Resume all saved registers that don't "survive" standby state */
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__reg_write(pcf, PCF50633_REG_INT1M, pcf->standby_regs.int1m);
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@@ -1956,7 +1974,6 @@ static int pcf50633_resume(struct device *dev)
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__reg_write(pcf, PCF50633_REG_INT3M, pcf->standby_regs.int3m);
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__reg_write(pcf, PCF50633_REG_INT4M, pcf->standby_regs.int4m);
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__reg_write(pcf, PCF50633_REG_INT5M, pcf->standby_regs.int5m);
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- printk(KERN_INFO"c\n");
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__reg_write(pcf, PCF50633_REG_OOCTIM2, pcf->standby_regs.ooctim2);
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__reg_write(pcf, PCF50633_REG_AUTOOUT, pcf->standby_regs.autoout);
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@@ -1967,17 +1984,24 @@ static int pcf50633_resume(struct device *dev)
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__reg_write(pcf, PCF50633_REG_DOWN2ENA, pcf->standby_regs.down2ena);
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__reg_write(pcf, PCF50633_REG_MEMLDOOUT, pcf->standby_regs.memldoout);
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__reg_write(pcf, PCF50633_REG_MEMLDOENA, pcf->standby_regs.memldoena);
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- __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.ledout);
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- __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.ledena);
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- __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.leddim);
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- printk(KERN_INFO"d\n");
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+
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+ /* platform can choose to defer backlight bringup */
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+ if (!pcf->pdata->defer_resume_backlight) {
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+ __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.ledout);
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+ __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.ledena);
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+ __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.leddim);
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+ } else { /* force backlight down, platform will restore later */
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+ __reg_write(pcf, PCF50633_REG_LEDOUT, 2);
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+ __reg_write(pcf, PCF50633_REG_LEDENA, 0x20);
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+ __reg_write(pcf, PCF50633_REG_LEDDIM, 1);
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+ }
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+
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/* FIXME: one big read? */
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for (i = 0; i < 7; i++) {
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u_int8_t reg_out = PCF50633_REG_LDO1OUT + 2*i;
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__reg_write(pcf, reg_out, pcf->standby_regs.ldo[i].out);
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__reg_write(pcf, reg_out+1, pcf->standby_regs.ldo[i].ena);
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}
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- printk(KERN_INFO"e\n");
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/* mutex_unlock(&pcf->lock); */ /* resume in atomic context */
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diff --git a/drivers/video/display/jbt6k74.c b/drivers/video/display/jbt6k74.c
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index 7e11da7..178e2da 100644
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--- a/drivers/video/display/jbt6k74.c
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+++ b/drivers/video/display/jbt6k74.c
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@@ -647,9 +647,14 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
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static void jbt_resume_work(struct work_struct *work)
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{
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struct jbt_info *jbt = container_of(work, struct jbt_info, work);
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+ struct jbt6k74_platform_data *jbt6k74_pdata =
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+ jbt->spi_dev->dev.platform_data;
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printk(KERN_INFO"jbt_resume_work waiting...\n");
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- msleep(2000);
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+ /* 100ms is not enough here 2008-05-08 andy@openmoko.com
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+ * if CONFIG_PM_DEBUG is enabled 2000ms is required
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+ */
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+ msleep(400);
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printk(KERN_INFO"jbt_resume_work GO...\n");
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jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
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@@ -665,6 +670,11 @@ static void jbt_resume_work(struct work_struct *work)
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}
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jbt6k74_display_onoff(jbt, 1);
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+ /* this gives the platform a chance to bring up backlight now */
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+
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+ if (jbt6k74_pdata->resuming)
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+ (jbt6k74_pdata->resuming)(0);
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+
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printk(KERN_INFO"jbt_resume_work done...\n");
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}
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diff --git a/include/linux/jbt6k74.h b/include/linux/jbt6k74.h
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index 3fbe178..0ac9124 100644
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--- a/include/linux/jbt6k74.h
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+++ b/include/linux/jbt6k74.h
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@@ -2,7 +2,8 @@
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#define __JBT6K74_H__
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struct jbt6k74_platform_data {
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- void (* reset)(int devindex, int level);
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+ void (*reset)(int devindex, int level);
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+ void (*resuming)(int devindex); /* called when LCM is resumed */
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};
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#endif
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diff --git a/include/linux/pcf50633.h b/include/linux/pcf50633.h
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index b6a67ee..f427985 100644
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--- a/include/linux/pcf50633.h
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+++ b/include/linux/pcf50633.h
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@@ -61,6 +61,9 @@ pcf50633_usb_curlim_set(struct pcf50633_data *pcf, int ma);
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extern void
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pcf50633_charge_enable(struct pcf50633_data *pcf, int on);
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+extern void
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+pcf50633_backlight_resume(struct pcf50633_data *pcf);
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+
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#define PCF50633_FEAT_EXTON 0x00000001 /* not yet supported */
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#define PCF50633_FEAT_MBC 0x00000002
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#define PCF50633_FEAT_BBC 0x00000004 /* not yet supported */
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@@ -89,6 +92,9 @@ struct pcf50633_platform_data {
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u_int8_t mbcc3; /* charger voltage / current */
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} charger;
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pmu_cb *cb;
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+
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+ /* post-resume backlight bringup */
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+ int defer_resume_backlight;
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};
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#endif /* _PCF50633_H */
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--
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1.5.6.3
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