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Diffstat (limited to 'drivers/video/omap2/displays/panel-taal.c')
-rw-r--r--drivers/video/omap2/displays/panel-taal.c1551
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 54a07da8587a..000000000000
--- 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");