diff options
Diffstat (limited to 'drivers/video/omap2/displays/panel-taal.c')
| -rw-r--r-- | drivers/video/omap2/displays/panel-taal.c | 1551 |
1 files changed, 0 insertions, 1551 deletions
diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c deleted file mode 100644 index 54a07da8587..00000000000 --- a/drivers/video/omap2/displays/panel-taal.c +++ /dev/null @@ -1,1551 +0,0 @@ -/* - * Taal DSI command mode panel - * - * Copyright (C) 2009 Nokia Corporation - * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/*#define DEBUG*/ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/jiffies.h> -#include <linux/sched.h> -#include <linux/backlight.h> -#include <linux/fb.h> -#include <linux/interrupt.h> -#include <linux/gpio.h> -#include <linux/workqueue.h> -#include <linux/slab.h> -#include <linux/mutex.h> - -#include <video/omapdss.h> -#include <video/omap-panel-data.h> -#include <video/mipi_display.h> - -/* DSI Virtual channel. Hardcoded for now. */ -#define TCH 0 - -#define DCS_READ_NUM_ERRORS 0x05 -#define DCS_BRIGHTNESS 0x51 -#define DCS_CTRL_DISPLAY 0x53 -#define DCS_WRITE_CABC 0x55 -#define DCS_READ_CABC 0x56 -#define DCS_GET_ID1 0xda -#define DCS_GET_ID2 0xdb -#define DCS_GET_ID3 0xdc - -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 taal_data { - struct mutex lock; - - struct backlight_device *bldev; - - unsigned long hw_guard_end; /* next value of jiffies when we can - * issue the next sleep in/out command - */ - unsigned long hw_guard_wait; /* max guard time in jiffies */ - - struct omap_dss_device *dssdev; - - /* panel HW configuration from DT or platform data */ - int reset_gpio; - int ext_te_gpio; - - bool use_dsi_backlight; - - struct omap_dsi_pin_config pin_config; - - /* runtime variables */ - bool enabled; - - bool te_enabled; - - atomic_t do_update; - int channel; - - struct delayed_work te_timeout_work; - - bool cabc_broken; - unsigned cabc_mode; - - bool intro_printed; - - struct workqueue_struct *workqueue; - - struct delayed_work esd_work; - unsigned esd_interval; - - bool ulps_enabled; - unsigned ulps_timeout; - struct delayed_work ulps_work; -}; - -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) -{ - td->hw_guard_wait = msecs_to_jiffies(guard_msec); - td->hw_guard_end = jiffies + td->hw_guard_wait; -} - -static void hw_guard_wait(struct taal_data *td) -{ - unsigned long wait = td->hw_guard_end - jiffies; - - if ((long)wait > 0 && wait <= td->hw_guard_wait) { - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(wait); - } -} - -static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data) -{ - int r; - u8 buf[1]; - - r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1); - - if (r < 0) - return r; - - *data = buf[0]; - - return 0; -} - -static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd) -{ - return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1); -} - -static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param) -{ - u8 buf[2]; - buf[0] = dcs_cmd; - buf[1] = param; - return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2); -} - -static int taal_sleep_in(struct taal_data *td) - -{ - u8 cmd; - int r; - - hw_guard_wait(td); - - cmd = MIPI_DCS_ENTER_SLEEP_MODE; - r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1); - if (r) - return r; - - hw_guard_start(td, 120); - - msleep(5); - - return 0; -} - -static int taal_sleep_out(struct taal_data *td) -{ - int r; - - hw_guard_wait(td); - - r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE); - if (r) - return r; - - hw_guard_start(td, 120); - - msleep(5); - - return 0; -} - -static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3) -{ - int r; - - r = taal_dcs_read_1(td, DCS_GET_ID1, id1); - if (r) - return r; - r = taal_dcs_read_1(td, DCS_GET_ID2, id2); - if (r) - return r; - r = taal_dcs_read_1(td, DCS_GET_ID3, id3); - if (r) - return r; - - return 0; -} - -static int taal_set_update_window(struct taal_data *td, - u16 x, u16 y, u16 w, u16 h) -{ - int r; - u16 x1 = x; - u16 x2 = x + w - 1; - u16 y1 = y; - u16 y2 = y + h - 1; - - u8 buf[5]; - buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS; - buf[1] = (x1 >> 8) & 0xff; - buf[2] = (x1 >> 0) & 0xff; - buf[3] = (x2 >> 8) & 0xff; - buf[4] = (x2 >> 0) & 0xff; - - r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf)); - if (r) - return r; - - buf[0] = MIPI_DCS_SET_PAGE_ADDRESS; - buf[1] = (y1 >> 8) & 0xff; - buf[2] = (y1 >> 0) & 0xff; - buf[3] = (y2 >> 8) & 0xff; - buf[4] = (y2 >> 0) & 0xff; - - r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf)); - if (r) - return r; - - dsi_vc_send_bta_sync(td->dssdev, td->channel); - - return r; -} - -static void taal_queue_esd_work(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - - if (td->esd_interval > 0) - queue_delayed_work(td->workqueue, &td->esd_work, - msecs_to_jiffies(td->esd_interval)); -} - -static void taal_cancel_esd_work(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - - 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); - int r; - - if (td->ulps_enabled) - return 0; - - taal_cancel_ulps_work(dssdev); - - r = _taal_enable_te(dssdev, false); - if (r) - goto err; - - if (gpio_is_valid(td->ext_te_gpio)) - disable_irq(gpio_to_irq(td->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); - int r; - - if (!td->ulps_enabled) - return 0; - - r = omapdss_dsi_display_enable(dssdev); - if (r) { - dev_err(dssdev->dev, "failed to enable DSI\n"); - goto err1; - } - - omapdss_dsi_vc_enable_hs(dssdev, td->channel, true); - - r = _taal_enable_te(dssdev, true); - if (r) { - dev_err(dssdev->dev, "failed to re-enable TE"); - goto err2; - } - - if (gpio_is_valid(td->ext_te_gpio)) - enable_irq(gpio_to_irq(td->ext_te_gpio)); - - taal_queue_ulps_work(dssdev); - - td->ulps_enabled = false; - - return 0; - -err2: - dev_err(dssdev->dev, "failed to exit ULPS"); - - r = taal_panel_reset(dssdev); - if (!r) { - if (gpio_is_valid(td->ext_te_gpio)) - enable_irq(gpio_to_irq(td->ext_te_gpio)); - td->ulps_enabled = false; - } -err1: - 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); - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - int level; - - if (dev->props.fb_blank == FB_BLANK_UNBLANK && - dev->props.power == FB_BLANK_UNBLANK) - level = dev->props.brightness; - else - level = 0; - - dev_dbg(dssdev->dev, "update brightness to %d\n", level); - - mutex_lock(&td->lock); - - if (td->enabled) { - dsi_bus_lock(dssdev); - - r = taal_wake_up(dssdev); - if (!r) - r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level); - - dsi_bus_unlock(dssdev); - } else { - r = 0; - } - - mutex_unlock(&td->lock); - - return r; -} - -static int taal_bl_get_intensity(struct backlight_device *dev) -{ - if (dev->props.fb_blank == FB_BLANK_UNBLANK && - dev->props.power == FB_BLANK_UNBLANK) - return dev->props.brightness; - - return 0; -} - -static const struct backlight_ops taal_bl_ops = { - .get_brightness = taal_bl_get_intensity, - .update_status = taal_bl_update_status, -}; - -static void taal_get_resolution(struct omap_dss_device *dssdev, - u16 *xres, u16 *yres) -{ - *xres = dssdev->panel.timings.x_res; - *yres = dssdev->panel.timings.y_res; -} - -static ssize_t taal_num_errors_show(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); - u8 errors = 0; - int r; - - mutex_lock(&td->lock); - - if (td->enabled) { - dsi_bus_lock(dssdev); - - r = taal_wake_up(dssdev); - if (!r) - r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors); - - dsi_bus_unlock(dssdev); - } else { - r = -ENODEV; - } - - mutex_unlock(&td->lock); - - if (r) - return r; - - return snprintf(buf, PAGE_SIZE, "%d\n", errors); -} - -static ssize_t taal_hw_revision_show(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); - u8 id1, id2, id3; - int r; - - mutex_lock(&td->lock); - - if (td->enabled) { - dsi_bus_lock(dssdev); - - r = taal_wake_up(dssdev); - if (!r) - r = taal_get_id(td, &id1, &id2, &id3); - - dsi_bus_unlock(dssdev); - } else { - r = -ENODEV; - } - - mutex_unlock(&td->lock); - - if (r) - return r; - - return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3); -} - -static const char *cabc_modes[] = { - "off", /* used also always when CABC is not supported */ - "ui", - "still-image", - "moving-image", -}; - -static ssize_t show_cabc_mode(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); - const char *mode_str; - int mode; - int len; - - mode = td->cabc_mode; - - mode_str = "unknown"; - if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes)) - mode_str = cabc_modes[mode]; - len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str); - - return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1; -} - -static ssize_t store_cabc_mode(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); - int i; - int r; - - for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) { - if (sysfs_streq(cabc_modes[i], buf)) - break; - } - - if (i == ARRAY_SIZE(cabc_modes)) - return -EINVAL; - - mutex_lock(&td->lock); - - if (td->enabled) { - dsi_bus_lock(dssdev); - - 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(dssdev); - } - - td->cabc_mode = i; - - mutex_unlock(&td->lock); - - return count; -err: - dsi_bus_unlock(dssdev); - mutex_unlock(&td->lock); - return r; -} - -static ssize_t show_cabc_available_modes(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int len; - int i; - - for (i = 0, len = 0; - len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++) - len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s", - i ? " " : "", cabc_modes[i], - i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : ""); - - return len < PAGE_SIZE ? len : PAGE_SIZE - 1; -} - -static ssize_t taal_store_esd_interval(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 = kstrtoul(buf, 10, &t); - if (r) - return r; - - mutex_lock(&td->lock); - taal_cancel_esd_work(dssdev); - td->esd_interval = t; - if (td->enabled) - taal_queue_esd_work(dssdev); - mutex_unlock(&td->lock); - - return count; -} - -static ssize_t taal_show_esd_interval(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->esd_interval; - mutex_unlock(&td->lock); - - 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 = kstrtoul(buf, 10, &t); - if (r) - return r; - - mutex_lock(&td->lock); - - if (td->enabled) { - dsi_bus_lock(dssdev); - - if (t) - r = taal_enter_ulps(dssdev); - else - r = taal_wake_up(dssdev); - - dsi_bus_unlock(dssdev); - } - - 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 = kstrtoul(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(dssdev); - r = taal_wake_up(dssdev); - dsi_bus_unlock(dssdev); - } - - 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, - show_cabc_mode, store_cabc_mode); -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, - &dev_attr_hw_revision.attr, - &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, -}; - -static struct attribute_group taal_attr_group = { - .attrs = taal_attrs, -}; - -static void taal_hw_reset(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - - if (!gpio_is_valid(td->reset_gpio)) - return; - - gpio_set_value(td->reset_gpio, 1); - udelay(10); - /* reset the panel */ - gpio_set_value(td->reset_gpio, 0); - /* assert reset */ - udelay(10); - gpio_set_value(td->reset_gpio, 1); - /* wait after releasing reset */ - msleep(5); -} - -static void taal_probe_pdata(struct taal_data *td, - const struct nokia_dsi_panel_data *pdata) -{ - td->reset_gpio = pdata->reset_gpio; - - if (pdata->use_ext_te) - td->ext_te_gpio = pdata->ext_te_gpio; - else - td->ext_te_gpio = -1; - - td->esd_interval = pdata->esd_interval; - td->ulps_timeout = pdata->ulps_timeout; - - td->use_dsi_backlight = pdata->use_dsi_backlight; - - td->pin_config = pdata->pin_config; -} - -static int taal_probe(struct omap_dss_device *dssdev) -{ - struct backlight_properties props; - struct taal_data *td; - struct backlight_device *bldev = NULL; - int r; - - dev_dbg(dssdev->dev, "probe\n"); - - td = devm_kzalloc(dssdev->dev, sizeof(*td), GFP_KERNEL); - if (!td) - return -ENOMEM; - - dev_set_drvdata(dssdev->dev, td); - td->dssdev = dssdev; - - if (dssdev->data) { - const struct nokia_dsi_panel_data *pdata = dssdev->data; - - taal_probe_pdata(td, pdata); - } else { - return -ENODEV; - } - - dssdev->panel.timings.x_res = 864; - dssdev->panel.timings.y_res = 480; - dssdev->panel.timings.pixel_clock = DIV_ROUND_UP(864 * 480 * 60, 1000); - dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888; - dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE | - OMAP_DSS_DISPLAY_CAP_TEAR_ELIM; - - mutex_init(&td->lock); - - atomic_set(&td->do_update, 0); - - if (gpio_is_valid(td->reset_gpio)) { - r = devm_gpio_request_one(dssdev->dev, td->reset_gpio, - GPIOF_OUT_INIT_LOW, "taal rst"); - if (r) { - dev_err(dssdev->dev, "failed to request reset gpio\n"); - return r; - } - } - - if (gpio_is_valid(td->ext_te_gpio)) { - r = devm_gpio_request_one(dssdev->dev, td->ext_te_gpio, - GPIOF_IN, "taal irq"); - if (r) { - dev_err(dssdev->dev, "GPIO request failed\n"); - return r; - } - - r = devm_request_irq(dssdev->dev, gpio_to_irq(td->ext_te_gpio), - taal_te_isr, - IRQF_TRIGGER_RISING, - "taal vsync", dssdev); - - if (r) { - dev_err(dssdev->dev, "IRQ request failed\n"); - return r; - } - - INIT_DEFERRABLE_WORK(&td->te_timeout_work, - taal_te_timeout_work_callback); - - dev_dbg(dssdev->dev, "Using GPIO TE\n"); - } - - td->workqueue = create_singlethread_workqueue("taal_esd"); - if (td->workqueue == NULL) { - dev_err(dssdev->dev, "can't create ESD workqueue\n"); - return -ENOMEM; - } - INIT_DEFERRABLE_WORK(&td->esd_work, taal_esd_work); - INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work); - - taal_hw_reset(dssdev); - - if (td->use_dsi_backlight) { - memset(&props, 0, sizeof(struct backlight_properties)); - props.max_brightness = 255; - - props.type = BACKLIGHT_RAW; - bldev = backlight_device_register(dev_name(dssdev->dev), - dssdev->dev, dssdev, &taal_bl_ops, &props); - if (IS_ERR(bldev)) { - r = PTR_ERR(bldev); - goto err_bl; - } - - td->bldev = bldev; - - bldev->props.fb_blank = FB_BLANK_UNBLANK; - bldev->props.power = FB_BLANK_UNBLANK; - bldev->props.brightness = 255; - - taal_bl_update_status(bldev); - } - - r = omap_dsi_request_vc(dssdev, &td->channel); - if (r) { - dev_err(dssdev->dev, "failed to get virtual channel\n"); - goto err_req_vc; - } - - r = omap_dsi_set_vc_id(dssdev, td->channel, TCH); - if (r) { - dev_err(dssdev->dev, "failed to set VC_ID\n"); - goto err_vc_id; - } - - r = sysfs_create_group(&dssdev->dev->kobj, &taal_attr_group); - if (r) { - dev_err(dssdev->dev, "failed to create sysfs files\n"); - goto err_vc_id; - } - - return 0; - -err_vc_id: - omap_dsi_release_vc(dssdev, td->channel); -err_req_vc: - if (bldev != NULL) - backlight_device_unregister(bldev); -err_bl: - destroy_workqueue(td->workqueue); - return r; -} - -static void __exit taal_remove(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - struct backlight_device *bldev; - - dev_dbg(dssdev->dev, "remove\n"); - - sysfs_remove_group(&dssdev->dev->kobj, &taal_attr_group); - omap_dsi_release_vc(dssdev, td->channel); - - bldev = td->bldev; - if (bldev != NULL) { - bldev->props.power = FB_BLANK_POWERDOWN; - taal_bl_update_status(bldev); - backlight_device_unregister(bldev); - } - - taal_cancel_ulps_work(dssdev); - taal_cancel_esd_work(dssdev); - destroy_workqueue(td->workqueue); - - /* reset, to be sure that the panel is in a valid state */ - taal_hw_reset(dssdev); -} - -static int taal_power_on(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - u8 id1, id2, id3; - int r; - struct omap_dss_dsi_config dsi_config = { - .mode = OMAP_DSS_DSI_CMD_MODE, - .pixel_format = OMAP_DSS_DSI_FMT_RGB888, - .timings = &dssdev->panel.timings, - .hs_clk_min = 150000000, - .hs_clk_max = 300000000, - .lp_clk_min = 7000000, - .lp_clk_max = 10000000, - }; - - r = omapdss_dsi_configure_pins(dssdev, &td->pin_config); - if (r) { - dev_err(dssdev->dev, "failed to configure DSI pins\n"); - goto err0; - }; - - r = omapdss_dsi_set_config(dssdev, &dsi_config); - if (r) { - dev_err(dssdev->dev, "failed to configure DSI\n"); - goto err0; - } - - r = omapdss_dsi_display_enable(dssdev); - if (r) { - dev_err(dssdev->dev, "failed to enable DSI\n"); - goto err0; - } - - taal_hw_reset(dssdev); - - omapdss_dsi_vc_enable_hs(dssdev, td->channel, false); - - r = taal_sleep_out(td); - if (r) - goto err; - - r = taal_get_id(td, &id1, &id2, &id3); - if (r) - goto err; - - /* on early Taal revisions CABC is broken */ - if (id2 == 0x00 || id2 == 0xff || id2 == 0x81) - td->cabc_broken = true; - - r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff); - if (r) - goto err; - - r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY, - (1<<2) | (1<<5)); /* BL | BCTRL */ - if (r) - goto err; - - r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT, - MIPI_DCS_PIXEL_FMT_24BIT); - if (r) - goto err; - - if (!td->cabc_broken) { - r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode); - if (r) - goto err; - } - - r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON); - if (r) - goto err; - - r = _taal_enable_te(dssdev, td->te_enabled); - if (r) - goto err; - - r = dsi_enable_video_output(dssdev, td->channel); - if (r) - goto err; - - td->enabled = 1; - - if (!td->intro_printed) { - dev_info(dssdev->dev, "panel revision %02x.%02x.%02x\n", - id1, id2, id3); - if (td->cabc_broken) - dev_info(dssdev->dev, - "old Taal version, CABC disabled\n"); - td->intro_printed = true; - } - - omapdss_dsi_vc_enable_hs(dssdev, td->channel, true); - - return 0; -err: - dev_err(dssdev->dev, "error while enabling panel, issuing HW reset\n"); - - taal_hw_reset(dssdev); - - omapdss_dsi_display_disable(dssdev, true, false); -err0: - return r; -} - -static void taal_power_off(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - - dsi_disable_video_output(dssdev, td->channel); - - r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_OFF); - if (!r) - r = taal_sleep_in(td); - - if (r) { - dev_err(dssdev->dev, - "error disabling panel, issuing HW reset\n"); - taal_hw_reset(dssdev); - } - - omapdss_dsi_display_disable(dssdev, true, false); - - td->enabled = 0; -} - -static int taal_panel_reset(struct omap_dss_device *dssdev) -{ - dev_err(dssdev->dev, "performing LCD reset\n"); - - taal_power_off(dssdev); - taal_hw_reset(dssdev); - return taal_power_on(dssdev); -} - -static int taal_enable(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - - dev_dbg(dssdev->dev, "enable\n"); - - mutex_lock(&td->lock); - - if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) { - r = -EINVAL; - goto err; - } - - dsi_bus_lock(dssdev); - - r = taal_power_on(dssdev); - - dsi_bus_unlock(dssdev); - - if (r) - goto err; - - taal_queue_esd_work(dssdev); - - dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; - - mutex_unlock(&td->lock); - - return 0; -err: - dev_dbg(dssdev->dev, "enable failed\n"); - mutex_unlock(&td->lock); - return r; -} - -static void taal_disable(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - - dev_dbg(dssdev->dev, "disable\n"); - - mutex_lock(&td->lock); - - taal_cancel_ulps_work(dssdev); - taal_cancel_esd_work(dssdev); - - dsi_bus_lock(dssdev); - - if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) { - int r; - - r = taal_wake_up(dssdev); - if (!r) - taal_power_off(dssdev); - } - - dsi_bus_unlock(dssdev); - - dssdev->state = OMAP_DSS_DISPLAY_DISABLED; - - mutex_unlock(&td->lock); -} - -static void taal_framedone_cb(int err, void *data) -{ - struct omap_dss_device *dssdev = data; - dev_dbg(dssdev->dev, "framedone, err %d\n", err); - dsi_bus_unlock(dssdev); -} - -static irqreturn_t taal_te_isr(int irq, void *data) -{ - struct omap_dss_device *dssdev = data; - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int old; - int r; - - old = atomic_cmpxchg(&td->do_update, 1, 0); - - if (old) { - cancel_delayed_work(&td->te_timeout_work); - - r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb, - dssdev); - if (r) - goto err; - } - - return IRQ_HANDLED; -err: - dev_err(dssdev->dev, "start update failed\n"); - dsi_bus_unlock(dssdev); - return IRQ_HANDLED; -} - -static void taal_te_timeout_work_callback(struct work_struct *work) -{ - struct taal_data *td = container_of(work, struct taal_data, - te_timeout_work.work); - struct omap_dss_device *dssdev = td->dssdev; - - dev_err(dssdev->dev, "TE not received for 250ms!\n"); - - atomic_set(&td->do_update, 0); - dsi_bus_unlock(dssdev); -} - -static int taal_update(struct omap_dss_device *dssdev, - u16 x, u16 y, u16 w, u16 h) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - - dev_dbg(dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h); - - mutex_lock(&td->lock); - dsi_bus_lock(dssdev); - - r = taal_wake_up(dssdev); - if (r) - goto err; - - if (!td->enabled) { - r = 0; - goto err; - } - - /* XXX no need to send this every frame, but dsi break if not done */ - r = taal_set_update_window(td, 0, 0, - dssdev->panel.timings.x_res, - dssdev->panel.timings.y_res); - if (r) - goto err; - - if (td->te_enabled && gpio_is_valid(td->ext_te_gpio)) { - schedule_delayed_work(&td->te_timeout_work, - msecs_to_jiffies(250)); - atomic_set(&td->do_update, 1); - } else { - r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb, - dssdev); - if (r) - goto err; - } - - /* note: no bus_unlock here. unlock is in framedone_cb */ - mutex_unlock(&td->lock); - return 0; -err: - dsi_bus_unlock(dssdev); - mutex_unlock(&td->lock); - return r; -} - -static int taal_sync(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - - dev_dbg(dssdev->dev, "sync\n"); - - mutex_lock(&td->lock); - dsi_bus_lock(dssdev); - dsi_bus_unlock(dssdev); - mutex_unlock(&td->lock); - - dev_dbg(dssdev->dev, "sync done\n"); - - return 0; -} - -static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - - if (enable) - r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0); - else - r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF); - - if (!gpio_is_valid(td->ext_te_gpio)) - omapdss_dsi_enable_te(dssdev, enable); - - /* possible panel bug */ - msleep(100); - - return r; -} - -static int taal_enable_te(struct omap_dss_device *dssdev, bool enable) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - - mutex_lock(&td->lock); - - if (td->te_enabled == enable) - goto end; - - dsi_bus_lock(dssdev); - - if (td->enabled) { - r = taal_wake_up(dssdev); - if (r) - goto err; - - r = _taal_enable_te(dssdev, enable); - if (r) - goto err; - } - - td->te_enabled = enable; - - dsi_bus_unlock(dssdev); -end: - mutex_unlock(&td->lock); - - return 0; -err: - dsi_bus_unlock(dssdev); - mutex_unlock(&td->lock); - - return r; -} - -static int taal_get_te(struct omap_dss_device *dssdev) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - int r; - - mutex_lock(&td->lock); - r = td->te_enabled; - mutex_unlock(&td->lock); - - return r; -} - -static int taal_run_test(struct omap_dss_device *dssdev, int test_num) -{ - struct taal_data *td = dev_get_drvdata(dssdev->dev); - u8 id1, id2, id3; - int r; - - mutex_lock(&td->lock); - - if (!td->enabled) { - r = -ENODEV; - goto err1; - } - - dsi_bus_lock(dssdev); - - r = taal_wake_up(dssdev); - if (r) - goto err2; - - r = taal_dcs_read_1(td, DCS_GET_ID1, &id1); - if (r) - goto err2; - r = taal_dcs_read_1(td, DCS_GET_ID2, &id2); - if (r) - goto err2; - r = taal_dcs_read_1(td, DCS_GET_ID3, &id3); - if (r) - goto err2; - - dsi_bus_unlock(dssdev); - mutex_unlock(&td->lock); - return 0; -err2: - dsi_bus_unlock(dssdev); -err1: - mutex_unlock(&td->lock); - return r; -} - -static int taal_memory_read(struct omap_dss_device *dssdev, - void *buf, size_t size, - u16 x, u16 y, u16 w, u16 h) -{ - int r; - int first = 1; - int plen; - unsigned buf_used = 0; - struct taal_data *td = dev_get_drvdata(dssdev->dev); - - if (size < w * h * 3) - return -ENOMEM; - - mutex_lock(&td->lock); - - if (!td->enabled) { - r = -ENODEV; - goto err1; - } - - size = min(w * h * 3, - dssdev->panel.timings.x_res * - dssdev->panel.timings.y_res * 3); - - dsi_bus_lock(dssdev); - - 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. */ - if (size % 2) - plen = 1; - else - plen = 2; - - taal_set_update_window(td, x, y, w, h); - - r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen); - if (r) - goto err2; - - while (buf_used < size) { - u8 dcs_cmd = first ? 0x2e : 0x3e; - first = 0; - - r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd, - buf + buf_used, size - buf_used); - - if (r < 0) { - dev_err(dssdev->dev, "read error\n"); - goto err3; - } - - buf_used += r; - - if (r < plen) { - dev_err(dssdev->dev, "short read\n"); - break; - } - - if (signal_pending(current)) { - dev_err(dssdev->dev, "signal pending, " - "aborting memory read\n"); - r = -ERESTARTSYS; - goto err3; - } - } - - r = buf_used; - -err3: - dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1); -err2: - dsi_bus_unlock(dssdev); -err1: - mutex_unlock(&td->lock); - 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(dssdev); - - taal_enter_ulps(dssdev); - - dsi_bus_unlock(dssdev); - mutex_unlock(&td->lock); -} - -static void taal_esd_work(struct work_struct *work) -{ - struct taal_data *td = container_of(work, struct taal_data, - esd_work.work); - struct omap_dss_device *dssdev = td->dssdev; - u8 state1, state2; - int r; - - mutex_lock(&td->lock); - - if (!td->enabled) { - mutex_unlock(&td->lock); - return; - } - - dsi_bus_lock(dssdev); - - r = taal_wake_up(dssdev); - if (r) { - dev_err(dssdev->dev, "failed to exit ULPS\n"); - goto err; - } - - r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1); - if (r) { - dev_err(dssdev->dev, "failed to read Taal status\n"); - goto err; - } - - /* Run self diagnostics */ - r = taal_sleep_out(td); - if (r) { - dev_err(dssdev->dev, "failed to run Taal self-diagnostics\n"); - goto err; - } - - r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2); - if (r) { - dev_err(dssdev->dev, "failed to read Taal status\n"); - goto err; - } - - /* Each sleep out command will trigger a self diagnostic and flip - * Bit6 if the test passes. - */ - if (!((state1 ^ state2) & (1 << 6))) { - dev_err(dssdev->dev, "LCD self diagnostics failed\n"); - goto err; - } - /* Self-diagnostics result is also shown on TE GPIO line. We need - * to re-enable TE after self diagnostics */ - if (td->te_enabled && gpio_is_valid(td->ext_te_gpio)) { - r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0); - if (r) - goto err; - } - - dsi_bus_unlock(dssdev); - - taal_queue_esd_work(dssdev); - - mutex_unlock(&td->lock); - return; -err: - dev_err(dssdev->dev, "performing LCD reset\n"); - - taal_panel_reset(dssdev); - - dsi_bus_unlock(dssdev); - - taal_queue_esd_work(dssdev); - - mutex_unlock(&td->lock); -} - -static struct omap_dss_driver taal_driver = { - .probe = taal_probe, - .remove = __exit_p(taal_remove), - - .enable = taal_enable, - .disable = taal_disable, - - .update = taal_update, - .sync = taal_sync, - - .get_resolution = taal_get_resolution, - .get_recommended_bpp = omapdss_default_get_recommended_bpp, - - .enable_te = taal_enable_te, - .get_te = taal_get_te, - - .run_test = taal_run_test, - .memory_read = taal_memory_read, - - .driver = { - .name = "taal", - .owner = THIS_MODULE, - }, -}; - -static int __init taal_init(void) -{ - omap_dss_register_driver(&taal_driver); - - return 0; -} - -static void __exit taal_exit(void) -{ - omap_dss_unregister_driver(&taal_driver); -} - -module_init(taal_init); -module_exit(taal_exit); - -MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>"); -MODULE_DESCRIPTION("Taal Driver"); -MODULE_LICENSE("GPL"); |