diff options
| -rw-r--r-- | drivers/video/omap2/displays/panel-taal.c | 310 | ||||
| -rw-r--r-- | include/video/omap-panel-nokia-dsi.h | 2 |
2 files changed, 305 insertions, 7 deletions
diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c index a743b7cee7a..be230b3ff87 100644 --- a/drivers/video/omap2/displays/panel-taal.c +++ b/drivers/video/omap2/displays/panel-taal.c @@ -67,6 +67,8 @@ static irqreturn_t taal_te_isr(int irq, void *data); static void taal_te_timeout_work_callback(struct work_struct *work); static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable); +static int taal_panel_reset(struct omap_dss_device *dssdev); + struct panel_regulator { struct regulator *regulator; const char *name; @@ -232,6 +234,10 @@ struct taal_data { struct delayed_work esd_work; unsigned esd_interval; + bool ulps_enabled; + unsigned ulps_timeout; + struct delayed_work ulps_work; + struct panel_config *panel_config; }; @@ -242,6 +248,7 @@ static inline struct nokia_dsi_panel_data } static void taal_esd_work(struct work_struct *work); +static void taal_ulps_work(struct work_struct *work); static void hw_guard_start(struct taal_data *td, int guard_msec) { @@ -437,6 +444,107 @@ static void taal_cancel_esd_work(struct omap_dss_device *dssdev) cancel_delayed_work(&td->esd_work); } +static void taal_queue_ulps_work(struct omap_dss_device *dssdev) +{ + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + + if (td->ulps_timeout > 0) + queue_delayed_work(td->workqueue, &td->ulps_work, + msecs_to_jiffies(td->ulps_timeout)); +} + +static void taal_cancel_ulps_work(struct omap_dss_device *dssdev) +{ + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + + cancel_delayed_work(&td->ulps_work); +} + +static int taal_enter_ulps(struct omap_dss_device *dssdev) +{ + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); + int r; + + if (td->ulps_enabled) + return 0; + + taal_cancel_ulps_work(dssdev); + + r = _taal_enable_te(dssdev, false); + if (r) + goto err; + + disable_irq(gpio_to_irq(panel_data->ext_te_gpio)); + + omapdss_dsi_display_disable(dssdev, false, true); + + td->ulps_enabled = true; + + return 0; + +err: + dev_err(&dssdev->dev, "enter ULPS failed"); + taal_panel_reset(dssdev); + + td->ulps_enabled = false; + + taal_queue_ulps_work(dssdev); + + return r; +} + +static int taal_exit_ulps(struct omap_dss_device *dssdev) +{ + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); + int r; + + if (!td->ulps_enabled) + return 0; + + r = omapdss_dsi_display_enable(dssdev); + if (r) + goto err; + + omapdss_dsi_vc_enable_hs(td->channel, true); + + r = _taal_enable_te(dssdev, true); + if (r) + goto err; + + enable_irq(gpio_to_irq(panel_data->ext_te_gpio)); + + taal_queue_ulps_work(dssdev); + + td->ulps_enabled = false; + + return 0; + +err: + dev_err(&dssdev->dev, "exit ULPS failed"); + r = taal_panel_reset(dssdev); + + enable_irq(gpio_to_irq(panel_data->ext_te_gpio)); + td->ulps_enabled = false; + + taal_queue_ulps_work(dssdev); + + return r; +} + +static int taal_wake_up(struct omap_dss_device *dssdev) +{ + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + + if (td->ulps_enabled) + return taal_exit_ulps(dssdev); + + taal_cancel_ulps_work(dssdev); + taal_queue_ulps_work(dssdev); + return 0; +} + static int taal_bl_update_status(struct backlight_device *dev) { struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev); @@ -458,7 +566,11 @@ static int taal_bl_update_status(struct backlight_device *dev) if (td->use_dsi_bl) { if (td->enabled) { dsi_bus_lock(); - r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level); + + r = taal_wake_up(dssdev); + if (!r) + r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level); + dsi_bus_unlock(); } else { r = 0; @@ -521,7 +633,11 @@ static ssize_t taal_num_errors_show(struct device *dev, if (td->enabled) { dsi_bus_lock(); - r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors); + + r = taal_wake_up(dssdev); + if (!r) + r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors); + dsi_bus_unlock(); } else { r = -ENODEV; @@ -547,7 +663,11 @@ static ssize_t taal_hw_revision_show(struct device *dev, if (td->enabled) { dsi_bus_lock(); - r = taal_get_id(td, &id1, &id2, &id3); + + r = taal_wake_up(dssdev); + if (!r) + r = taal_get_id(td, &id1, &id2, &id3); + dsi_bus_unlock(); } else { r = -ENODEV; @@ -595,6 +715,7 @@ static ssize_t store_cabc_mode(struct device *dev, struct omap_dss_device *dssdev = to_dss_device(dev); struct taal_data *td = dev_get_drvdata(&dssdev->dev); int i; + int r; for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) { if (sysfs_streq(cabc_modes[i], buf)) @@ -608,8 +729,17 @@ static ssize_t store_cabc_mode(struct device *dev, if (td->enabled) { dsi_bus_lock(); - if (!td->cabc_broken) - taal_dcs_write_1(td, DCS_WRITE_CABC, i); + + if (!td->cabc_broken) { + r = taal_wake_up(dssdev); + if (r) + goto err; + + r = taal_dcs_write_1(td, DCS_WRITE_CABC, i); + if (r) + goto err; + } + dsi_bus_unlock(); } @@ -618,6 +748,10 @@ static ssize_t store_cabc_mode(struct device *dev, mutex_unlock(&td->lock); return count; +err: + dsi_bus_unlock(); + mutex_unlock(&td->lock); + return r; } static ssize_t show_cabc_available_modes(struct device *dev, @@ -675,6 +809,101 @@ static ssize_t taal_show_esd_interval(struct device *dev, return snprintf(buf, PAGE_SIZE, "%u\n", t); } +static ssize_t taal_store_ulps(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + unsigned long t; + int r; + + r = strict_strtoul(buf, 10, &t); + if (r) + return r; + + mutex_lock(&td->lock); + + if (td->enabled) { + dsi_bus_lock(); + + if (t) + r = taal_enter_ulps(dssdev); + else + r = taal_wake_up(dssdev); + + dsi_bus_unlock(); + } + + mutex_unlock(&td->lock); + + if (r) + return r; + + return count; +} + +static ssize_t taal_show_ulps(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + unsigned t; + + mutex_lock(&td->lock); + t = td->ulps_enabled; + mutex_unlock(&td->lock); + + return snprintf(buf, PAGE_SIZE, "%u\n", t); +} + +static ssize_t taal_store_ulps_timeout(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + unsigned long t; + int r; + + r = strict_strtoul(buf, 10, &t); + if (r) + return r; + + mutex_lock(&td->lock); + td->ulps_timeout = t; + + if (td->enabled) { + /* taal_wake_up will restart the timer */ + dsi_bus_lock(); + r = taal_wake_up(dssdev); + dsi_bus_unlock(); + } + + mutex_unlock(&td->lock); + + if (r) + return r; + + return count; +} + +static ssize_t taal_show_ulps_timeout(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct omap_dss_device *dssdev = to_dss_device(dev); + struct taal_data *td = dev_get_drvdata(&dssdev->dev); + unsigned t; + + mutex_lock(&td->lock); + t = td->ulps_timeout; + mutex_unlock(&td->lock); + + return snprintf(buf, PAGE_SIZE, "%u\n", t); +} + static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL); static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL); static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR, @@ -683,6 +912,10 @@ static DEVICE_ATTR(cabc_available_modes, S_IRUGO, show_cabc_available_modes, NULL); static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR, taal_show_esd_interval, taal_store_esd_interval); +static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR, + taal_show_ulps, taal_store_ulps); +static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR, + taal_show_ulps_timeout, taal_store_ulps_timeout); static struct attribute *taal_attrs[] = { &dev_attr_num_dsi_errors.attr, @@ -690,6 +923,8 @@ static struct attribute *taal_attrs[] = { &dev_attr_cabc_mode.attr, &dev_attr_cabc_available_modes.attr, &dev_attr_esd_interval.attr, + &dev_attr_ulps.attr, + &dev_attr_ulps_timeout.attr, NULL, }; @@ -759,6 +994,8 @@ static int taal_probe(struct omap_dss_device *dssdev) td->dssdev = dssdev; td->panel_config = panel_config; td->esd_interval = panel_data->esd_interval; + td->ulps_enabled = false; + td->ulps_timeout = panel_data->ulps_timeout; mutex_init(&td->lock); @@ -776,6 +1013,7 @@ static int taal_probe(struct omap_dss_device *dssdev) goto err_wq; } INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work); + INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work); dev_set_drvdata(&dssdev->dev, td); @@ -900,6 +1138,7 @@ static void __exit taal_remove(struct omap_dss_device *dssdev) taal_bl_update_status(bldev); backlight_device_unregister(bldev); + taal_cancel_ulps_work(dssdev); taal_cancel_esd_work(dssdev); destroy_workqueue(td->workqueue); @@ -1072,12 +1311,15 @@ static void taal_disable(struct omap_dss_device *dssdev) mutex_lock(&td->lock); + taal_cancel_ulps_work(dssdev); taal_cancel_esd_work(dssdev); dsi_bus_lock(); - if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) { + taal_wake_up(dssdev); taal_power_off(dssdev); + } dsi_bus_unlock(); @@ -1100,11 +1342,14 @@ static int taal_suspend(struct omap_dss_device *dssdev) goto err; } + taal_cancel_ulps_work(dssdev); taal_cancel_esd_work(dssdev); dsi_bus_lock(); - taal_power_off(dssdev); + r = taal_wake_up(dssdev); + if (!r) + taal_power_off(dssdev); dsi_bus_unlock(); @@ -1213,6 +1458,10 @@ static int taal_update(struct omap_dss_device *dssdev, mutex_lock(&td->lock); dsi_bus_lock(); + r = taal_wake_up(dssdev); + if (r) + goto err; + if (!td->enabled) { r = 0; goto err; @@ -1300,6 +1549,10 @@ static int taal_enable_te(struct omap_dss_device *dssdev, bool enable) dsi_bus_lock(); if (td->enabled) { + r = taal_wake_up(dssdev); + if (r) + goto err; + r = _taal_enable_te(dssdev, enable); if (r) goto err; @@ -1346,6 +1599,10 @@ static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate) dsi_bus_lock(); if (td->enabled) { + r = taal_wake_up(dssdev); + if (r) + goto err; + r = taal_set_addr_mode(td, rotate, td->mirror); if (r) goto err; @@ -1389,6 +1646,10 @@ static int taal_mirror(struct omap_dss_device *dssdev, bool enable) dsi_bus_lock(); if (td->enabled) { + r = taal_wake_up(dssdev); + if (r) + goto err; + r = taal_set_addr_mode(td, td->rotate, enable); if (r) goto err; @@ -1433,6 +1694,10 @@ static int taal_run_test(struct omap_dss_device *dssdev, int test_num) dsi_bus_lock(); + r = taal_wake_up(dssdev); + if (r) + goto err2; + r = taal_dcs_read_1(td, DCS_GET_ID1, &id1); if (r) goto err2; @@ -1479,6 +1744,10 @@ static int taal_memory_read(struct omap_dss_device *dssdev, dsi_bus_lock(); + r = taal_wake_up(dssdev); + if (r) + goto err2; + /* plen 1 or 2 goes into short packet. until checksum error is fixed, * use short packets. plen 32 works, but bigger packets seem to cause * an error. */ @@ -1531,6 +1800,27 @@ err1: return r; } +static void taal_ulps_work(struct work_struct *work) +{ + struct taal_data *td = container_of(work, struct taal_data, + ulps_work.work); + struct omap_dss_device *dssdev = td->dssdev; + + mutex_lock(&td->lock); + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) { + mutex_unlock(&td->lock); + return; + } + + dsi_bus_lock(); + + taal_enter_ulps(dssdev); + + dsi_bus_unlock(); + mutex_unlock(&td->lock); +} + static void taal_esd_work(struct work_struct *work) { struct taal_data *td = container_of(work, struct taal_data, @@ -1549,6 +1839,12 @@ static void taal_esd_work(struct work_struct *work) dsi_bus_lock(); + r = taal_wake_up(dssdev); + if (r) { + dev_err(&dssdev->dev, "failed to exit ULPS\n"); + goto err; + } + r = taal_dcs_read_1(td, DCS_RDDSDR, &state1); if (r) { dev_err(&dssdev->dev, "failed to read Taal status\n"); diff --git a/include/video/omap-panel-nokia-dsi.h b/include/video/omap-panel-nokia-dsi.h index 3bd8d231add..921ae932722 100644 --- a/include/video/omap-panel-nokia-dsi.h +++ b/include/video/omap-panel-nokia-dsi.h @@ -9,6 +9,7 @@ struct omap_dss_device; * @use_ext_te: use external TE * @ext_te_gpio: external TE GPIO * @esd_interval: interval of ESD checks, 0 = disabled (ms) + * @ulps_timeout: time to wait before entering ULPS, 0 = disabled (ms) * @max_backlight_level: maximum backlight level * @set_backlight: pointer to backlight set function * @get_backlight: pointer to backlight get function @@ -22,6 +23,7 @@ struct nokia_dsi_panel_data { int ext_te_gpio; unsigned esd_interval; + unsigned ulps_timeout; int max_backlight_level; int (*set_backlight)(struct omap_dss_device *dssdev, int level); |