diff options
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.30/drivers/video/display/jbt6k74.c | 269 |
1 files changed, 149 insertions, 120 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/video/display/jbt6k74.c b/target/linux/s3c24xx/files-2.6.30/drivers/video/display/jbt6k74.c index 883159a5b..87f0d6731 100644 --- a/target/linux/s3c24xx/files-2.6.30/drivers/video/display/jbt6k74.c +++ b/target/linux/s3c24xx/files-2.6.30/drivers/video/display/jbt6k74.c @@ -4,6 +4,7 @@ * Author: Harald Welte <laforge@openmoko.org>, * Stefan Schmidt <stefan@openmoko.org> * Copyright (C) 2008 by Harald Welte <laforge@openmoko.org> + * Copyright (C) 2009 by Lars-Peter Clausen <lars@metafoo.de> * All rights reserved. * * This program is free software; you can redistribute it and/or @@ -29,8 +30,10 @@ #include <linux/device.h> #include <linux/platform_device.h> #include <linux/delay.h> +#include <linux/workqueue.h> #include <linux/jbt6k74.h> #include <linux/fb.h> +#include <linux/lcd.h> #include <linux/time.h> enum jbt_register { @@ -120,14 +123,18 @@ static const char *jbt_resolution_names[] = { }; struct jbt_info { + struct mutex lock; /* protects this structure */ enum jbt_resolution resolution; enum jbt_power_mode power_mode; + enum jbt_power_mode suspend_mode; + int suspended; 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]; + struct lcd_device *lcd_dev; unsigned long last_sleep; + struct delayed_work blank_work; + int blank_mode; + u16 tx_buf[4]; + u16 reg_cache[0xEE]; }; #define JBT_COMMAND 0x000 @@ -139,7 +146,7 @@ static int jbt_reg_write_nodata(struct jbt_info *jbt, u8 reg) jbt->tx_buf[0] = JBT_COMMAND | reg; rc = spi_write(jbt->spi_dev, (u8 *)jbt->tx_buf, - 1*sizeof(u16)); + 1*sizeof(u16)); if (rc == 0) jbt->reg_cache[reg] = 0; else @@ -157,7 +164,7 @@ static int jbt_reg_write(struct jbt_info *jbt, u8 reg, u8 data) jbt->tx_buf[0] = JBT_COMMAND | reg; jbt->tx_buf[1] = JBT_DATA | data; rc = spi_write(jbt->spi_dev, (u8 *)jbt->tx_buf, - 2*sizeof(u16)); + 2*sizeof(u16)); if (rc == 0) jbt->reg_cache[reg] = data; else @@ -175,7 +182,7 @@ static int jbt_reg_write16(struct jbt_info *jbt, u8 reg, u16 data) jbt->tx_buf[2] = JBT_DATA | (data & 0xff); rc = spi_write(jbt->spi_dev, (u8 *)jbt->tx_buf, - 3*sizeof(u16)); + 3*sizeof(u16)); if (rc == 0) jbt->reg_cache[reg] = data; else @@ -207,7 +214,7 @@ static int jbt_init_regs(struct jbt_info *jbt) * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement * to avoid red / blue flicker */ - rc |= jbt_reg_write(jbt, JBT_REG_ASW_SLEW, 0x04); + rc |= jbt_reg_write(jbt, JBT_REG_ASW_SLEW, 0x04 | (1 << 5)); rc |= jbt_reg_write(jbt, JBT_REG_DUMMY_DISPLAY, 0x00); rc |= jbt_reg_write(jbt, JBT_REG_SLEEP_OUT_FR_A, 0x11); @@ -319,11 +326,11 @@ static int normal_to_sleep(struct jbt_info *jbt) int rc; /* Make sure we are 120 ms after SLEEP_OUT */ - if (time_before(jiffies, jbt->last_sleep)) - mdelay(jiffies_to_msecs(jbt->last_sleep - jiffies)); + while (time_before(jiffies, jbt->last_sleep)) + cpu_relax(); rc = jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF); - rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0x8002); + rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0x8000 | 1 << 3); rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_IN); jbt->last_sleep = jiffies + msecs_to_jiffies(120); @@ -338,9 +345,9 @@ static int sleep_to_standby(struct jbt_info *jbt) return jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x00); } -/* frontend function */ int jbt6k74_enter_power_mode(struct jbt_info *jbt, enum jbt_power_mode new_mode) { + struct jbt6k74_platform_data *pdata = jbt->spi_dev->dev.platform_data; int rc = -EINVAL; dev_dbg(&jbt->spi_dev->dev, "entering (old_state=%s, new_state=%s)\n", @@ -349,6 +356,22 @@ int jbt6k74_enter_power_mode(struct jbt_info *jbt, enum jbt_power_mode new_mode) mutex_lock(&jbt->lock); + if (jbt->suspended) { + switch (new_mode) { + case JBT_POWER_MODE_DEEP_STANDBY: + case JBT_POWER_MODE_SLEEP: + case JBT_POWER_MODE_NORMAL: + rc = 0; + jbt->suspend_mode = new_mode; + break; + default: + break; + } + } else if (new_mode == JBT_POWER_MODE_NORMAL && + pdata->enable_pixel_clock) { + pdata->enable_pixel_clock(&jbt->spi_dev->dev, 1); + } + switch (jbt->power_mode) { case JBT_POWER_MODE_DEEP_STANDBY: switch (new_mode) { @@ -396,11 +419,15 @@ int jbt6k74_enter_power_mode(struct jbt_info *jbt, enum jbt_power_mode new_mode) } } - if (rc == 0) + if (rc == 0) { jbt->power_mode = new_mode; - else + if (new_mode != JBT_POWER_MODE_NORMAL && + pdata->enable_pixel_clock) + pdata->enable_pixel_clock(&jbt->spi_dev->dev, 0); + } else { dev_err(&jbt->spi_dev->dev, "Failed enter state '%s')\n", jbt_power_mode_names[new_mode]); + } mutex_unlock(&jbt->lock); @@ -412,15 +439,15 @@ int jbt6k74_set_resolution(struct jbt_info *jbt, enum jbt_resolution new_resolut int rc = 0; enum jbt_resolution old_resolution; - mutex_lock(&jbt->lock); - - if (jbt->resolution == new_resolution) - return 0; - if (new_resolution != JBT_RESOLUTION_VGA && new_resolution != JBT_RESOLUTION_QVGA) return -EINVAL; + mutex_lock(&jbt->lock); + + if (jbt->resolution == new_resolution) + goto out_unlock; + old_resolution = jbt->resolution; jbt->resolution = new_resolution; @@ -442,44 +469,13 @@ int jbt6k74_set_resolution(struct jbt_info *jbt, enum jbt_resolution new_resolut } } +out_unlock: mutex_unlock(&jbt->lock); return rc; } EXPORT_SYMBOL_GPL(jbt6k74_set_resolution); -static ssize_t power_mode_read(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct jbt_info *jbt = dev_get_drvdata(dev); - - if (jbt->power_mode >= ARRAY_SIZE(jbt_power_mode_names)) - return -EIO; - - return sprintf(buf, "%s\n", jbt_power_mode_names[jbt->power_mode]); -} - -static ssize_t power_mode_write(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct jbt_info *jbt = dev_get_drvdata(dev); - int i, rc; - - for (i = 0; i < ARRAY_SIZE(jbt_power_mode_names); i++) { - if (!strncmp(buf, jbt_power_mode_names[i], - strlen(jbt_power_mode_names[i]))) { - rc = jbt6k74_enter_power_mode(jbt, i); - if (rc) - return rc; - return count; - } - } - - return -EINVAL; -} - -static DEVICE_ATTR(power_mode, 0644, power_mode_read, power_mode_write); - static ssize_t resolution_read(struct device *dev, struct device_attribute *attr, char *buf) { @@ -533,7 +529,7 @@ static ssize_t gamma_read(struct device *dev, struct device_attribute *attr, mutex_lock(&jbt->lock); val = jbt->reg_cache[reg]; - mutex_unlock(&jbt->lock); + mutex_unlock(&jbt->lock); return sprintf(buf, "0x%04x\n", val); } @@ -590,7 +586,6 @@ static DEVICE_ATTR(gamma_blue_offset, 0644, gamma_read, gamma_write); static DEVICE_ATTR(reset, 0600, NULL, reset_write); static struct attribute *jbt_sysfs_entries[] = { - &dev_attr_power_mode.attr, &dev_attr_resolution.attr, &dev_attr_gamma_fine1.attr, &dev_attr_gamma_fine2.attr, @@ -605,61 +600,89 @@ 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; - struct fb_info *info; - int fb_blank; - - jbt = container_of(self, struct jbt_info, fb_notif); - - dev_dbg(&jbt->spi_dev->dev, "event=%lu\n", event); - - switch (event) { - case FB_EVENT_MODE_CHANGE: - case FB_EVENT_MODE_CHANGE_ALL: - info = evdata->info; - if (info->var.xres == 240 && - info->var.yres == 320) { - jbt6k74_set_resolution(jbt, JBT_RESOLUTION_QVGA); - } else if (info->var.xres == 480 && - info->var.yres == 640) { - jbt6k74_set_resolution(jbt, JBT_RESOLUTION_VGA); - } else { - dev_err(&jbt->spi_dev->dev, "Unknown resolution. Entering sleep mode.\n"); - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_SLEEP); - } +/* FIXME: This in an ugly hack to delay display blanking. + When the jbt is in sleep mode it displays an all white screen and thus one + will a see a short flash. + By delaying the blanking we will give the backlight a chance to turn off and + thus avoid getting the flash */ +static void jbt_blank_worker(struct work_struct *work) { + struct jbt_info *jbt = container_of(work, struct jbt_info, + blank_work.work); + + switch (jbt->blank_mode) { + case FB_BLANK_NORMAL: + jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_SLEEP); + break; + case FB_BLANK_POWERDOWN: + jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); + break; + default: break; - case FB_EVENT_BLANK: - case FB_EVENT_CONBLANK: - fb_blank = *(int *)evdata->data; - switch (fb_blank) { - case FB_BLANK_UNBLANK: - dev_dbg(&jbt->spi_dev->dev, "unblank\n"); - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); - break; - case FB_BLANK_NORMAL: - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_SLEEP); - dev_dbg(&jbt->spi_dev->dev, "blank\n"); - break; - case FB_BLANK_VSYNC_SUSPEND: - dev_dbg(&jbt->spi_dev->dev, "vsync suspend\n"); - break; - case FB_BLANK_HSYNC_SUSPEND: - dev_dbg(&jbt->spi_dev->dev, "hsync suspend\n"); - break; - case FB_BLANK_POWERDOWN: - dev_dbg(&jbt->spi_dev->dev, "powerdown\n"); - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); - break; - } } +} - return 0; +static int jbt6k74_set_mode(struct lcd_device *ld, struct fb_videomode *m) { + int rc = -EINVAL; + struct jbt_info *jbt = dev_get_drvdata(&ld->dev); + + if (m->xres == 240 && m->yres == 320) { + rc = jbt6k74_set_resolution(jbt, JBT_RESOLUTION_QVGA); + } else if (m->xres == 480 && m->yres == 640) { + rc = jbt6k74_set_resolution(jbt, JBT_RESOLUTION_VGA); + } else { + dev_err(&jbt->spi_dev->dev, "Unknown resolution. Entering sleep mode.\n"); + jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_SLEEP); + } + + return rc; } +static int jbt6k74_set_power(struct lcd_device *ld, int power) { + int rc = -EINVAL; + struct jbt_info *jbt = dev_get_drvdata(&ld->dev); + + jbt->blank_mode = power; + cancel_rearming_delayed_work(&jbt->blank_work); + + switch (power) { + case FB_BLANK_UNBLANK: + dev_dbg(&jbt->spi_dev->dev, "unblank\n"); + rc = jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); + break; + case FB_BLANK_NORMAL: + dev_dbg(&jbt->spi_dev->dev, "blank\n"); + rc = schedule_delayed_work(&jbt->blank_work, HZ); + break; + case FB_BLANK_POWERDOWN: + dev_dbg(&jbt->spi_dev->dev, "powerdown\n"); + rc = schedule_delayed_work(&jbt->blank_work, HZ); + break; + default: + break; + } + + return rc; +} + +static int jbt6k74_get_power(struct lcd_device *ld) { + struct jbt_info *jbt = dev_get_drvdata(&ld->dev); + + switch (jbt->power_mode) { + case JBT_POWER_MODE_NORMAL: + return FB_BLANK_UNBLANK; + case JBT_POWER_MODE_SLEEP: + return FB_BLANK_NORMAL; + default: + return JBT_POWER_MODE_DEEP_STANDBY; + } +} + +struct lcd_ops jbt6k74_lcd_ops = { + .set_power = jbt6k74_set_power, + .get_power = jbt6k74_get_power, + .set_mode = jbt6k74_set_mode, +}; + /* linux device model infrastructure */ static int __devinit jbt_probe(struct spi_device *spi) @@ -685,6 +708,17 @@ static int __devinit jbt_probe(struct spi_device *spi) return -ENOMEM; jbt->spi_dev = spi; + + jbt->lcd_dev = lcd_device_register("jbt6k74-lcd", &spi->dev, + jbt, &jbt6k74_lcd_ops); + + if (IS_ERR(jbt->lcd_dev)) { + rc = PTR_ERR(jbt->lcd_dev); + goto err_free_drvdata; + } + + INIT_DELAYED_WORK(&jbt->blank_work, jbt_blank_worker); + jbt->resolution = JBT_RESOLUTION_VGA; jbt->power_mode = JBT_POWER_MODE_DEEP_STANDBY; jbt->last_sleep = jiffies + msecs_to_jiffies(120); @@ -695,7 +729,7 @@ static int __devinit jbt_probe(struct spi_device *spi) rc = jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); if (rc < 0) { dev_err(&spi->dev, "cannot enter NORMAL state\n"); - goto err_free_drvdata; + goto err_unregister_lcd; } rc = sysfs_create_group(&spi->dev.kobj, &jbt_attr_group); @@ -704,22 +738,15 @@ static int __devinit jbt_probe(struct spi_device *spi) goto err_standby; } - 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; - } - if (pdata->probe_completed) (pdata->probe_completed)(&spi->dev); return 0; -err_sysfs: - sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group); err_standby: jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); +err_unregister_lcd: + lcd_device_unregister(jbt->lcd_dev); err_free_drvdata: dev_set_drvdata(&spi->dev, NULL); kfree(jbt); @@ -732,12 +759,14 @@ static int __devexit jbt_remove(struct spi_device *spi) struct jbt_info *jbt = dev_get_drvdata(&spi->dev); /* We don't want to switch off the display in case the user - * accidentially onloads the module (whose use count normally is 0) */ + * accidentially unloads the module (whose use count normally is 0) */ jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); - fb_unregister_client(&jbt->fb_notif); sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group); dev_set_drvdata(&spi->dev, NULL); + + lcd_device_unregister(jbt->lcd_dev); + kfree(jbt); return 0; @@ -748,7 +777,10 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state) { struct jbt_info *jbt = dev_get_drvdata(&spi->dev); + jbt->suspend_mode = jbt->power_mode; + jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); + jbt->suspended = 1; dev_info(&spi->dev, "suspended\n"); @@ -758,12 +790,9 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state) int jbt6k74_resume(struct spi_device *spi) { struct jbt_info *jbt = dev_get_drvdata(&spi->dev); - struct jbt6k74_platform_data *pdata = spi->dev.platform_data; - - jbt6k74_enter_power_mode(jbt, jbt->power_mode); - if (pdata->resuming) - (pdata->resuming)(0); + jbt->suspended = 0; + jbt6k74_enter_power_mode(jbt, jbt->suspend_mode); dev_info(&spi->dev, "resumed\n"); |