jbt6k74: Change the state machine to have one state field for resolution and one for power mode. Loosing the resolution when the display is sent to sleep is just wrong. Automatically switch resolution when a framebuffer mode change event is recevied.
SVN-Revision: 16116
This commit is contained in:
Lars-Peter Clausen
parent
cbe2c48249
commit
fefb312698
1 changed files with 186 additions and 152 deletions
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@ -97,40 +97,42 @@ enum jbt_register {
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};
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enum jbt_state {
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JBT_STATE_DEEP_STANDBY,
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JBT_STATE_SLEEP,
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JBT_STATE_NORMAL,
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JBT_STATE_QVGA_NORMAL,
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enum jbt_resolution {
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JBT_RESOLUTION_VGA,
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JBT_RESOLUTION_QVGA,
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};
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static const char *jbt_state_names[] = {
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[JBT_STATE_DEEP_STANDBY] = "deep-standby",
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[JBT_STATE_SLEEP] = "sleep",
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[JBT_STATE_NORMAL] = "normal",
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[JBT_STATE_QVGA_NORMAL] = "qvga-normal",
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enum jbt_power_mode {
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JBT_POWER_MODE_DEEP_STANDBY,
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JBT_POWER_MODE_SLEEP,
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JBT_POWER_MODE_NORMAL,
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};
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static const char *jbt_power_mode_names[] = {
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[JBT_POWER_MODE_DEEP_STANDBY] = "deep-standby",
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[JBT_POWER_MODE_SLEEP] = "sleep",
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[JBT_POWER_MODE_NORMAL] = "normal",
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};
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static const char *jbt_resolution_names[] = {
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[JBT_RESOLUTION_VGA] = "vga",
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[JBT_RESOLUTION_QVGA] = "qvga",
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};
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struct jbt_info {
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enum jbt_state state, normal_state;
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enum jbt_resolution resolution;
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enum jbt_power_mode power_mode;
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struct spi_device *spi_dev;
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struct mutex lock; /* protects tx_buf and reg_cache */
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struct notifier_block fb_notif;
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u16 tx_buf[8];
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u16 reg_cache[0xEE];
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struct timespec last_sleep;
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unsigned long last_sleep;
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};
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#define JBT_COMMAND 0x000
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#define JBT_DATA 0x100
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static inline unsigned int timespec_sub_ms(struct timespec lhs,
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struct timespec rhs)
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{
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struct timespec ts = timespec_sub(lhs, rhs);
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return (ts.tv_sec * MSEC_PER_SEC) + (ts.tv_nsec / NSEC_PER_MSEC);
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}
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static int jbt_reg_write_nodata(struct jbt_info *jbt, u8 reg)
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{
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int rc;
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@ -141,7 +143,7 @@ static int jbt_reg_write_nodata(struct jbt_info *jbt, u8 reg)
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if (rc == 0)
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jbt->reg_cache[reg] = 0;
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else
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printk(KERN_ERR"jbt_reg_write_nodata spi_write ret %d\n",
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dev_err(&jbt->spi_dev->dev, "jbt_reg_write_nodata spi_write ret %d\n",
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rc);
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return rc;
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@ -159,7 +161,7 @@ static int jbt_reg_write(struct jbt_info *jbt, u8 reg, u8 data)
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if (rc == 0)
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jbt->reg_cache[reg] = data;
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else
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printk(KERN_ERR"jbt_reg_write spi_write ret %d\n", rc);
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dev_err(&jbt->spi_dev->dev, "jbt_reg_write spi_write ret %d\n", rc);
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return rc;
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}
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@ -177,7 +179,7 @@ static int jbt_reg_write16(struct jbt_info *jbt, u8 reg, u16 data)
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if (rc == 0)
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jbt->reg_cache[reg] = data;
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else
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printk(KERN_ERR"jbt_reg_write16 spi_write ret %d\n", rc);
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dev_err(&jbt->spi_dev->dev, "jbt_reg_write16 spi_write ret %d\n", rc);
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return rc;
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}
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@ -187,7 +189,7 @@ static int jbt_init_regs(struct jbt_info *jbt)
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int rc;
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dev_dbg(&jbt->spi_dev->dev, "entering %cVGA mode\n",
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jbt->normal_state == JBT_STATE_QVGA_NORMAL ? 'Q' : ' ');
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jbt->resolution == JBT_RESOLUTION_QVGA ? 'Q' : ' ');
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rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE1, 0x01);
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rc |= jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE2, 0x00);
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@ -221,7 +223,7 @@ static int jbt_init_regs(struct jbt_info *jbt)
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rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_INCLINATION, 0x00);
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rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
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if (jbt->normal_state != JBT_STATE_QVGA_NORMAL) {
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if (jbt->resolution != JBT_RESOLUTION_QVGA) {
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rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_VGA, 0x1f0);
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rc |= jbt_reg_write(jbt, JBT_REG_BLANK_CONTROL, 0x02);
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rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV, 0x0804);
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@ -276,12 +278,10 @@ static int sleep_to_normal(struct jbt_info *jbt)
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int rc;
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/* Make sure we are 120 ms after SLEEP_OUT */
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unsigned int sleep_time = timespec_sub_ms(current_kernel_time(),
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jbt->last_sleep);
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if (sleep_time < 120)
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mdelay(120 - sleep_time);
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if (time_before(jiffies, jbt->last_sleep))
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mdelay(jiffies_to_msecs(jbt->last_sleep - jiffies));
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if (jbt->normal_state == JBT_STATE_NORMAL) {
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if (jbt->resolution == JBT_RESOLUTION_VGA) {
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/* RGB I/F on, RAM wirte off, QVGA through, SIGCON enable */
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rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE, 0x80);
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@ -306,7 +306,7 @@ static int sleep_to_normal(struct jbt_info *jbt)
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/* Sleep mode off */
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rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_OUT);
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jbt->last_sleep = current_kernel_time();
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jbt->last_sleep = jiffies + msecs_to_jiffies(120);
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/* Allow the booster and display controller to restart stably */
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mdelay(5);
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@ -319,15 +319,13 @@ static int normal_to_sleep(struct jbt_info *jbt)
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int rc;
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/* Make sure we are 120 ms after SLEEP_OUT */
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unsigned int sleep_time = timespec_sub_ms(current_kernel_time(),
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jbt->last_sleep);
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if (sleep_time < 120)
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mdelay(120 - sleep_time);
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if (time_before(jiffies, jbt->last_sleep))
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mdelay(jiffies_to_msecs(jbt->last_sleep - jiffies));
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rc = jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF);
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rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0x8002);
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rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_IN);
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jbt->last_sleep = current_kernel_time();
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jbt->last_sleep = jiffies + msecs_to_jiffies(120);
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/* Allow the internal circuits to stop automatically */
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mdelay(5);
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@ -341,40 +339,26 @@ static int sleep_to_standby(struct jbt_info *jbt)
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}
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/* frontend function */
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int jbt6k74_enter_state(struct jbt_info *jbt, enum jbt_state new_state)
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int jbt6k74_enter_power_mode(struct jbt_info *jbt, enum jbt_power_mode new_mode)
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{
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int rc = -EINVAL;
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/* dev_dbg(&jbt->spi_dev->dev, "entering (old_state=%s, new_state=%s)\n",
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jbt_state_names[jbt->state],
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jbt_state_names[new_state]);*/
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/* printk("entering (old_state=%s, new_state=%s)\n",
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jbt_state_names[jbt->state],
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jbt_state_names[new_state]);*/
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dev_dbg(&jbt->spi_dev->dev, "entering (old_state=%s, new_state=%s)\n",
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jbt_power_mode_names[jbt->power_mode],
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jbt_power_mode_names[new_mode]);
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mutex_lock(&jbt->lock);
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if (new_state == JBT_STATE_NORMAL ||
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new_state == JBT_STATE_QVGA_NORMAL)
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jbt->normal_state = new_state;
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switch (jbt->state) {
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case JBT_STATE_DEEP_STANDBY:
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switch (new_state) {
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case JBT_STATE_DEEP_STANDBY:
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switch (jbt->power_mode) {
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case JBT_POWER_MODE_DEEP_STANDBY:
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switch (new_mode) {
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case JBT_POWER_MODE_DEEP_STANDBY:
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rc = 0;
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break;
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case JBT_STATE_SLEEP:
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case JBT_POWER_MODE_SLEEP:
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rc = standby_to_sleep(jbt);
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break;
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case JBT_STATE_NORMAL:
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/* first transition into sleep */
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rc = standby_to_sleep(jbt);
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/* then transition into normal */
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rc |= sleep_to_normal(jbt);
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break;
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case JBT_STATE_QVGA_NORMAL:
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case JBT_POWER_MODE_NORMAL:
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/* first transition into sleep */
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rc = standby_to_sleep(jbt);
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/* then transition into normal */
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@ -382,107 +366,109 @@ int jbt6k74_enter_state(struct jbt_info *jbt, enum jbt_state new_state)
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break;
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}
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break;
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case JBT_STATE_SLEEP:
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switch (new_state) {
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case JBT_STATE_SLEEP:
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case JBT_POWER_MODE_SLEEP:
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switch (new_mode) {
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case JBT_POWER_MODE_SLEEP:
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rc = 0;
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break;
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case JBT_STATE_DEEP_STANDBY:
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case JBT_POWER_MODE_DEEP_STANDBY:
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rc = sleep_to_standby(jbt);
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break;
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case JBT_STATE_NORMAL:
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case JBT_STATE_QVGA_NORMAL:
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case JBT_POWER_MODE_NORMAL:
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rc = sleep_to_normal(jbt);
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break;
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}
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break;
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case JBT_STATE_NORMAL:
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switch (new_state) {
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case JBT_STATE_NORMAL:
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case JBT_POWER_MODE_NORMAL:
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switch (new_mode) {
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case JBT_POWER_MODE_NORMAL:
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rc = 0;
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break;
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case JBT_STATE_DEEP_STANDBY:
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case JBT_POWER_MODE_DEEP_STANDBY:
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/* first transition into sleep */
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rc = normal_to_sleep(jbt);
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/* then transition into deep standby */
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rc |= sleep_to_standby(jbt);
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break;
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case JBT_STATE_SLEEP:
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case JBT_POWER_MODE_SLEEP:
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rc = normal_to_sleep(jbt);
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break;
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case JBT_STATE_QVGA_NORMAL:
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/* first transition into sleep */
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rc = normal_to_sleep(jbt);
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/* second transition into deep standby */
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rc |= sleep_to_standby(jbt);
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/* third transition into sleep */
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rc |= standby_to_sleep(jbt);
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/* fourth transition into normal */
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rc |= sleep_to_normal(jbt);
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break;
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}
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break;
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case JBT_STATE_QVGA_NORMAL:
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switch (new_state) {
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case JBT_STATE_QVGA_NORMAL:
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rc = 0;
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break;
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case JBT_STATE_DEEP_STANDBY:
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/* first transition into sleep */
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rc = normal_to_sleep(jbt);
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/* then transition into deep standby */
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rc |= sleep_to_standby(jbt);
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break;
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case JBT_STATE_SLEEP:
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rc = normal_to_sleep(jbt);
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break;
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case JBT_STATE_NORMAL:
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/* first transition into sleep */
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rc = normal_to_sleep(jbt);
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/* second transition into deep standby */
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rc |= sleep_to_standby(jbt);
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/* third transition into sleep */
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rc |= standby_to_sleep(jbt);
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/* fourth transition into normal */
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rc |= sleep_to_normal(jbt);
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break;
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}
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break;
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}
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if (rc == 0)
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jbt->state = new_state;
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jbt->power_mode = new_mode;
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else
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dev_err(&jbt->spi_dev->dev, "Failed enter state '%s')\n",
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jbt_state_names[new_state]);
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jbt_power_mode_names[new_mode]);
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mutex_unlock(&jbt->lock);
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return rc;
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}
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EXPORT_SYMBOL_GPL(jbt6k74_enter_state);
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EXPORT_SYMBOL_GPL(jbt6k74_enter_power_mode);
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static ssize_t state_read(struct device *dev, struct device_attribute *attr,
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int jbt6k74_set_resolution(struct jbt_info *jbt, enum jbt_resolution new_resolution) {
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int rc = 0;
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enum jbt_resolution old_resolution;
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mutex_lock(&jbt->lock);
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if (jbt->resolution == new_resolution)
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return 0;
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if (new_resolution != JBT_RESOLUTION_VGA &&
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new_resolution != JBT_RESOLUTION_QVGA)
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return -EINVAL;
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old_resolution = jbt->resolution;
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jbt->resolution = new_resolution;
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if (jbt->power_mode == JBT_POWER_MODE_NORMAL) {
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/* first transition into sleep */
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rc = normal_to_sleep(jbt);
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/* second transition into deep standby */
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/* rc |= sleep_to_standby(jbt);*/
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/* third transition into sleep */
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/* rc |= standby_to_sleep(jbt);*/
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/* fourth transition into normal */
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rc |= sleep_to_normal(jbt);
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if (rc) {
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jbt->resolution = old_resolution;
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dev_err(&jbt->spi_dev->dev, "Failed to set resolution '%s')\n",
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jbt_resolution_names[new_resolution]);
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}
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}
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mutex_unlock(&jbt->lock);
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return rc;
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}
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EXPORT_SYMBOL_GPL(jbt6k74_set_resolution);
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static ssize_t power_mode_read(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct jbt_info *jbt = dev_get_drvdata(dev);
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if (jbt->state >= ARRAY_SIZE(jbt_state_names))
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if (jbt->power_mode >= ARRAY_SIZE(jbt_power_mode_names))
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return -EIO;
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return sprintf(buf, "%s\n", jbt_state_names[jbt->state]);
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return sprintf(buf, "%s\n", jbt_power_mode_names[jbt->power_mode]);
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}
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static ssize_t state_write(struct device *dev, struct device_attribute *attr,
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static ssize_t power_mode_write(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct jbt_info *jbt = dev_get_drvdata(dev);
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int i, rc;
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for (i = 0; i < ARRAY_SIZE(jbt_state_names); i++) {
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if (!strncmp(buf, jbt_state_names[i],
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strlen(jbt_state_names[i]))) {
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rc = jbt6k74_enter_state(jbt, i);
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for (i = 0; i < ARRAY_SIZE(jbt_power_mode_names); i++) {
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if (!strncmp(buf, jbt_power_mode_names[i],
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strlen(jbt_power_mode_names[i]))) {
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rc = jbt6k74_enter_power_mode(jbt, i);
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if (rc)
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return rc;
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return count;
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@ -492,7 +478,39 @@ static ssize_t state_write(struct device *dev, struct device_attribute *attr,
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return -EINVAL;
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}
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static DEVICE_ATTR(state, 0644, state_read, state_write);
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static DEVICE_ATTR(power_mode, 0644, power_mode_read, power_mode_write);
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static ssize_t resolution_read(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct jbt_info *jbt = dev_get_drvdata(dev);
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if (jbt->resolution >= ARRAY_SIZE(jbt_resolution_names))
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return -EIO;
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return sprintf(buf, "%s\n", jbt_resolution_names[jbt->resolution]);
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}
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static ssize_t resolution_write(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct jbt_info *jbt = dev_get_drvdata(dev);
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int i, rc;
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for (i = 0; i < ARRAY_SIZE(jbt_resolution_names); i++) {
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if (!strncmp(buf, jbt_resolution_names[i],
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strlen(jbt_resolution_names[i]))) {
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rc = jbt6k74_set_resolution(jbt, i);
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if (rc)
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return rc;
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return count;
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}
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}
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return -EINVAL;
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}
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static DEVICE_ATTR(resolution, 0644, resolution_read, resolution_write);
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static int reg_by_string(const char *name)
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{
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@ -547,8 +565,6 @@ static ssize_t reset_write(struct device *dev, struct device_attribute *attr,
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mutex_lock(&jbt->lock);
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jbt->state = JBT_STATE_DEEP_STANDBY;
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/* hard reset the jbt6k74 */
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(pdata->reset)(0, 0);
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mdelay(1);
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@ -562,7 +578,7 @@ static ssize_t reset_write(struct device *dev, struct device_attribute *attr,
|
|||
|
||||
mutex_unlock(&jbt->lock);
|
||||
|
||||
jbt6k74_enter_state(jbt, jbt->normal_state);
|
||||
jbt6k74_enter_power_mode(jbt, jbt->power_mode);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
|
@ -574,7 +590,8 @@ 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_state.attr,
|
||||
&dev_attr_power_mode.attr,
|
||||
&dev_attr_resolution.attr,
|
||||
&dev_attr_gamma_fine1.attr,
|
||||
&dev_attr_gamma_fine2.attr,
|
||||
&dev_attr_gamma_inclination.attr,
|
||||
|
|
@ -593,34 +610,51 @@ static int fb_notifier_callback(struct notifier_block *self,
|
|||
{
|
||||
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);
|
||||
|
||||
if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
|
||||
return 0;
|
||||
|
||||
fb_blank = *(int *)evdata->data;
|
||||
switch (fb_blank) {
|
||||
case FB_BLANK_UNBLANK:
|
||||
dev_dbg(&jbt->spi_dev->dev, "unblank\n");
|
||||
jbt6k74_enter_state(jbt, jbt->normal_state);
|
||||
break;
|
||||
case FB_BLANK_NORMAL:
|
||||
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_state(jbt, JBT_STATE_SLEEP);
|
||||
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);
|
||||
}
|
||||
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;
|
||||
|
|
@ -651,14 +685,14 @@ static int __devinit jbt_probe(struct spi_device *spi)
|
|||
return -ENOMEM;
|
||||
|
||||
jbt->spi_dev = spi;
|
||||
jbt->normal_state = JBT_STATE_NORMAL;
|
||||
jbt->state = JBT_STATE_DEEP_STANDBY;
|
||||
jbt->last_sleep = current_kernel_time();
|
||||
jbt->resolution = JBT_RESOLUTION_VGA;
|
||||
jbt->power_mode = JBT_POWER_MODE_DEEP_STANDBY;
|
||||
jbt->last_sleep = jiffies + msecs_to_jiffies(120);
|
||||
mutex_init(&jbt->lock);
|
||||
|
||||
dev_set_drvdata(&spi->dev, jbt);
|
||||
|
||||
rc = jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
|
||||
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;
|
||||
|
|
@ -685,7 +719,7 @@ static int __devinit jbt_probe(struct spi_device *spi)
|
|||
err_sysfs:
|
||||
sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group);
|
||||
err_standby:
|
||||
jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
|
||||
jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY);
|
||||
err_free_drvdata:
|
||||
dev_set_drvdata(&spi->dev, NULL);
|
||||
kfree(jbt);
|
||||
|
|
@ -699,7 +733,7 @@ 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) */
|
||||
jbt6k74_enter_state(jbt, jbt->normal_state);
|
||||
jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL);
|
||||
|
||||
fb_unregister_client(&jbt->fb_notif);
|
||||
sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group);
|
||||
|
|
@ -714,7 +748,7 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
|
|||
{
|
||||
struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
|
||||
|
||||
jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
|
||||
jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY);
|
||||
|
||||
dev_info(&spi->dev, "suspended\n");
|
||||
|
||||
|
|
@ -726,7 +760,7 @@ 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_state(jbt, jbt->normal_state);
|
||||
jbt6k74_enter_power_mode(jbt, jbt->power_mode);
|
||||
|
||||
if (pdata->resuming)
|
||||
(pdata->resuming)(0);
|
||||
|
|
|
|||
Loading…
Reference in a new issue