| /* |
| * 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/regulator/consumer.h> |
| #include <linux/mutex.h> |
| |
| #include <plat/display.h> |
| #include <plat/nokia-dsi-panel.h> |
| |
| /* DSI Virtual channel. Hardcoded for now. */ |
| #define TCH 0 |
| |
| #define DCS_READ_NUM_ERRORS 0x05 |
| #define DCS_READ_POWER_MODE 0x0a |
| #define DCS_READ_MADCTL 0x0b |
| #define DCS_READ_PIXEL_FORMAT 0x0c |
| #define DCS_RDDSDR 0x0f |
| #define DCS_SLEEP_IN 0x10 |
| #define DCS_SLEEP_OUT 0x11 |
| #define DCS_DISPLAY_OFF 0x28 |
| #define DCS_DISPLAY_ON 0x29 |
| #define DCS_COLUMN_ADDR 0x2a |
| #define DCS_PAGE_ADDR 0x2b |
| #define DCS_MEMORY_WRITE 0x2c |
| #define DCS_TEAR_OFF 0x34 |
| #define DCS_TEAR_ON 0x35 |
| #define DCS_MEM_ACC_CTRL 0x36 |
| #define DCS_PIXEL_FORMAT 0x3a |
| #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 |
| |
| #define TAAL_ESD_CHECK_PERIOD msecs_to_jiffies(5000) |
| |
| 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); |
| |
| struct panel_regulator { |
| struct regulator *regulator; |
| const char *name; |
| int min_uV; |
| int max_uV; |
| }; |
| |
| static void free_regulators(struct panel_regulator *regulators, int n) |
| { |
| int i; |
| |
| for (i = 0; i < n; i++) { |
| /* disable/put in reverse order */ |
| regulator_disable(regulators[n - i - 1].regulator); |
| regulator_put(regulators[n - i - 1].regulator); |
| } |
| } |
| |
| static int init_regulators(struct omap_dss_device *dssdev, |
| struct panel_regulator *regulators, int n) |
| { |
| int r, i, v; |
| |
| for (i = 0; i < n; i++) { |
| struct regulator *reg; |
| |
| reg = regulator_get(&dssdev->dev, regulators[i].name); |
| if (IS_ERR(reg)) { |
| dev_err(&dssdev->dev, "failed to get regulator %s\n", |
| regulators[i].name); |
| r = PTR_ERR(reg); |
| goto err; |
| } |
| |
| /* FIXME: better handling of fixed vs. variable regulators */ |
| v = regulator_get_voltage(reg); |
| if (v < regulators[i].min_uV || v > regulators[i].max_uV) { |
| r = regulator_set_voltage(reg, regulators[i].min_uV, |
| regulators[i].max_uV); |
| if (r) { |
| dev_err(&dssdev->dev, |
| "failed to set regulator %s voltage\n", |
| regulators[i].name); |
| regulator_put(reg); |
| goto err; |
| } |
| } |
| |
| r = regulator_enable(reg); |
| if (r) { |
| dev_err(&dssdev->dev, "failed to enable regulator %s\n", |
| regulators[i].name); |
| regulator_put(reg); |
| goto err; |
| } |
| |
| regulators[i].regulator = reg; |
| } |
| |
| return 0; |
| |
| err: |
| free_regulators(regulators, i); |
| |
| return r; |
| } |
| |
| /** |
| * struct panel_config - panel configuration |
| * @name: panel name |
| * @type: panel type |
| * @timings: panel resolution |
| * @sleep: various panel specific delays, passed to msleep() if non-zero |
| * @reset_sequence: reset sequence timings, passed to udelay() if non-zero |
| * @regulators: array of panel regulators |
| * @num_regulators: number of regulators in the array |
| */ |
| struct panel_config { |
| const char *name; |
| int type; |
| |
| struct omap_video_timings timings; |
| |
| struct { |
| unsigned int sleep_in; |
| unsigned int sleep_out; |
| unsigned int hw_reset; |
| unsigned int enable_te; |
| } sleep; |
| |
| struct { |
| unsigned int high; |
| unsigned int low; |
| } reset_sequence; |
| |
| struct panel_regulator *regulators; |
| int num_regulators; |
| }; |
| |
| enum { |
| PANEL_TAAL, |
| }; |
| |
| static struct panel_config panel_configs[] = { |
| { |
| .name = "taal", |
| .type = PANEL_TAAL, |
| .timings = { |
| .x_res = 864, |
| .y_res = 480, |
| }, |
| .sleep = { |
| .sleep_in = 5, |
| .sleep_out = 5, |
| .hw_reset = 5, |
| .enable_te = 100, /* possible panel bug */ |
| }, |
| .reset_sequence = { |
| .high = 10, |
| .low = 10, |
| }, |
| }, |
| }; |
| |
| 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; |
| |
| bool enabled; |
| u8 rotate; |
| bool mirror; |
| |
| bool te_enabled; |
| |
| atomic_t do_update; |
| struct { |
| u16 x; |
| u16 y; |
| u16 w; |
| u16 h; |
| } update_region; |
| struct delayed_work te_timeout_work; |
| |
| bool use_dsi_bl; |
| |
| bool cabc_broken; |
| unsigned cabc_mode; |
| |
| bool intro_printed; |
| |
| struct workqueue_struct *esd_wq; |
| struct delayed_work esd_work; |
| |
| struct panel_config *panel_config; |
| }; |
| |
| static inline struct nokia_dsi_panel_data |
| *get_panel_data(const struct omap_dss_device *dssdev) |
| { |
| return (struct nokia_dsi_panel_data *) dssdev->data; |
| } |
| |
| static void taal_esd_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(u8 dcs_cmd, u8 *data) |
| { |
| int r; |
| u8 buf[1]; |
| |
| r = dsi_vc_dcs_read(TCH, dcs_cmd, buf, 1); |
| |
| if (r < 0) |
| return r; |
| |
| *data = buf[0]; |
| |
| return 0; |
| } |
| |
| static int taal_dcs_write_0(u8 dcs_cmd) |
| { |
| return dsi_vc_dcs_write(TCH, &dcs_cmd, 1); |
| } |
| |
| static int taal_dcs_write_1(u8 dcs_cmd, u8 param) |
| { |
| u8 buf[2]; |
| buf[0] = dcs_cmd; |
| buf[1] = param; |
| return dsi_vc_dcs_write(TCH, buf, 2); |
| } |
| |
| static int taal_sleep_in(struct taal_data *td) |
| |
| { |
| u8 cmd; |
| int r; |
| |
| hw_guard_wait(td); |
| |
| cmd = DCS_SLEEP_IN; |
| r = dsi_vc_dcs_write_nosync(TCH, &cmd, 1); |
| if (r) |
| return r; |
| |
| hw_guard_start(td, 120); |
| |
| if (td->panel_config->sleep.sleep_in) |
| msleep(td->panel_config->sleep.sleep_in); |
| |
| return 0; |
| } |
| |
| static int taal_sleep_out(struct taal_data *td) |
| { |
| int r; |
| |
| hw_guard_wait(td); |
| |
| r = taal_dcs_write_0(DCS_SLEEP_OUT); |
| if (r) |
| return r; |
| |
| hw_guard_start(td, 120); |
| |
| if (td->panel_config->sleep.sleep_out) |
| msleep(td->panel_config->sleep.sleep_out); |
| |
| return 0; |
| } |
| |
| static int taal_get_id(u8 *id1, u8 *id2, u8 *id3) |
| { |
| int r; |
| |
| r = taal_dcs_read_1(DCS_GET_ID1, id1); |
| if (r) |
| return r; |
| r = taal_dcs_read_1(DCS_GET_ID2, id2); |
| if (r) |
| return r; |
| r = taal_dcs_read_1(DCS_GET_ID3, id3); |
| if (r) |
| return r; |
| |
| return 0; |
| } |
| |
| static int taal_set_addr_mode(u8 rotate, bool mirror) |
| { |
| int r; |
| u8 mode; |
| int b5, b6, b7; |
| |
| r = taal_dcs_read_1(DCS_READ_MADCTL, &mode); |
| if (r) |
| return r; |
| |
| switch (rotate) { |
| default: |
| case 0: |
| b7 = 0; |
| b6 = 0; |
| b5 = 0; |
| break; |
| case 1: |
| b7 = 0; |
| b6 = 1; |
| b5 = 1; |
| break; |
| case 2: |
| b7 = 1; |
| b6 = 1; |
| b5 = 0; |
| break; |
| case 3: |
| b7 = 1; |
| b6 = 0; |
| b5 = 1; |
| break; |
| } |
| |
| if (mirror) |
| b6 = !b6; |
| |
| mode &= ~((1<<7) | (1<<6) | (1<<5)); |
| mode |= (b7 << 7) | (b6 << 6) | (b5 << 5); |
| |
| return taal_dcs_write_1(DCS_MEM_ACC_CTRL, mode); |
| } |
| |
| static int taal_set_update_window(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] = DCS_COLUMN_ADDR; |
| 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(TCH, buf, sizeof(buf)); |
| if (r) |
| return r; |
| |
| buf[0] = DCS_PAGE_ADDR; |
| 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(TCH, buf, sizeof(buf)); |
| if (r) |
| return r; |
| |
| dsi_vc_send_bta_sync(TCH); |
| |
| return r; |
| } |
| |
| 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); |
| struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); |
| 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->use_dsi_bl) { |
| if (td->enabled) { |
| dsi_bus_lock(); |
| r = taal_dcs_write_1(DCS_BRIGHTNESS, level); |
| dsi_bus_unlock(); |
| } else { |
| r = 0; |
| } |
| } else { |
| if (!panel_data->set_backlight) |
| r = -EINVAL; |
| else |
| r = panel_data->set_backlight(dssdev, level); |
| } |
| |
| 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_timings(struct omap_dss_device *dssdev, |
| struct omap_video_timings *timings) |
| { |
| *timings = dssdev->panel.timings; |
| } |
| |
| static void taal_get_resolution(struct omap_dss_device *dssdev, |
| u16 *xres, u16 *yres) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| |
| if (td->rotate == 0 || td->rotate == 2) { |
| *xres = dssdev->panel.timings.x_res; |
| *yres = dssdev->panel.timings.y_res; |
| } else { |
| *yres = dssdev->panel.timings.x_res; |
| *xres = 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; |
| int r; |
| |
| mutex_lock(&td->lock); |
| |
| if (td->enabled) { |
| dsi_bus_lock(); |
| r = taal_dcs_read_1(DCS_READ_NUM_ERRORS, &errors); |
| dsi_bus_unlock(); |
| } 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(); |
| r = taal_get_id(&id1, &id2, &id3); |
| dsi_bus_unlock(); |
| } 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; |
| |
| 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(); |
| if (!td->cabc_broken) |
| taal_dcs_write_1(DCS_WRITE_CABC, i); |
| dsi_bus_unlock(); |
| } |
| |
| td->cabc_mode = i; |
| |
| mutex_unlock(&td->lock); |
| |
| return count; |
| } |
| |
| 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 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 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, |
| 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); |
| struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); |
| |
| if (panel_data->reset_gpio == -1) |
| return; |
| |
| gpio_set_value(panel_data->reset_gpio, 1); |
| if (td->panel_config->reset_sequence.high) |
| udelay(td->panel_config->reset_sequence.high); |
| /* reset the panel */ |
| gpio_set_value(panel_data->reset_gpio, 0); |
| /* assert reset */ |
| if (td->panel_config->reset_sequence.low) |
| udelay(td->panel_config->reset_sequence.low); |
| gpio_set_value(panel_data->reset_gpio, 1); |
| /* wait after releasing reset */ |
| if (td->panel_config->sleep.hw_reset) |
| msleep(td->panel_config->sleep.hw_reset); |
| } |
| |
| static int taal_probe(struct omap_dss_device *dssdev) |
| { |
| struct backlight_properties props; |
| struct taal_data *td; |
| struct backlight_device *bldev; |
| struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); |
| struct panel_config *panel_config = NULL; |
| int r, i; |
| |
| dev_dbg(&dssdev->dev, "probe\n"); |
| |
| if (!panel_data || !panel_data->name) { |
| r = -EINVAL; |
| goto err; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(panel_configs); i++) { |
| if (strcmp(panel_data->name, panel_configs[i].name) == 0) { |
| panel_config = &panel_configs[i]; |
| break; |
| } |
| } |
| |
| if (!panel_config) { |
| r = -EINVAL; |
| goto err; |
| } |
| |
| dssdev->panel.config = OMAP_DSS_LCD_TFT; |
| dssdev->panel.timings = panel_config->timings; |
| dssdev->ctrl.pixel_size = 24; |
| |
| td = kzalloc(sizeof(*td), GFP_KERNEL); |
| if (!td) { |
| r = -ENOMEM; |
| goto err; |
| } |
| td->dssdev = dssdev; |
| td->panel_config = panel_config; |
| |
| mutex_init(&td->lock); |
| |
| atomic_set(&td->do_update, 0); |
| |
| r = init_regulators(dssdev, panel_config->regulators, |
| panel_config->num_regulators); |
| if (r) |
| goto err_reg; |
| |
| td->esd_wq = create_singlethread_workqueue("taal_esd"); |
| if (td->esd_wq == NULL) { |
| dev_err(&dssdev->dev, "can't create ESD workqueue\n"); |
| r = -ENOMEM; |
| goto err_wq; |
| } |
| INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work); |
| |
| dev_set_drvdata(&dssdev->dev, td); |
| |
| taal_hw_reset(dssdev); |
| |
| /* if no platform set_backlight() defined, presume DSI backlight |
| * control */ |
| memset(&props, 0, sizeof(struct backlight_properties)); |
| if (!panel_data->set_backlight) |
| td->use_dsi_bl = true; |
| |
| if (td->use_dsi_bl) |
| props.max_brightness = 255; |
| else |
| props.max_brightness = 127; |
| |
| props.type = BACKLIGHT_RAW; |
| bldev = backlight_device_register("taal", &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; |
| if (td->use_dsi_bl) |
| bldev->props.brightness = 255; |
| else |
| bldev->props.brightness = 127; |
| |
| taal_bl_update_status(bldev); |
| |
| if (panel_data->use_ext_te) { |
| int gpio = panel_data->ext_te_gpio; |
| |
| r = gpio_request(gpio, "taal irq"); |
| if (r) { |
| dev_err(&dssdev->dev, "GPIO request failed\n"); |
| goto err_gpio; |
| } |
| |
| gpio_direction_input(gpio); |
| |
| r = request_irq(gpio_to_irq(gpio), taal_te_isr, |
| IRQF_DISABLED | IRQF_TRIGGER_RISING, |
| "taal vsync", dssdev); |
| |
| if (r) { |
| dev_err(&dssdev->dev, "IRQ request failed\n"); |
| gpio_free(gpio); |
| goto err_irq; |
| } |
| |
| INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work, |
| taal_te_timeout_work_callback); |
| |
| dev_dbg(&dssdev->dev, "Using GPIO TE\n"); |
| } |
| |
| r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group); |
| if (r) { |
| dev_err(&dssdev->dev, "failed to create sysfs files\n"); |
| goto err_sysfs; |
| } |
| |
| return 0; |
| err_sysfs: |
| if (panel_data->use_ext_te) |
| free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev); |
| err_irq: |
| if (panel_data->use_ext_te) |
| gpio_free(panel_data->ext_te_gpio); |
| err_gpio: |
| backlight_device_unregister(bldev); |
| err_bl: |
| destroy_workqueue(td->esd_wq); |
| err_wq: |
| free_regulators(panel_config->regulators, panel_config->num_regulators); |
| err_reg: |
| kfree(td); |
| err: |
| return r; |
| } |
| |
| static void taal_remove(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); |
| struct backlight_device *bldev; |
| |
| dev_dbg(&dssdev->dev, "remove\n"); |
| |
| sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group); |
| |
| if (panel_data->use_ext_te) { |
| int gpio = panel_data->ext_te_gpio; |
| free_irq(gpio_to_irq(gpio), dssdev); |
| gpio_free(gpio); |
| } |
| |
| bldev = td->bldev; |
| bldev->props.power = FB_BLANK_POWERDOWN; |
| taal_bl_update_status(bldev); |
| backlight_device_unregister(bldev); |
| |
| cancel_delayed_work(&td->esd_work); |
| destroy_workqueue(td->esd_wq); |
| |
| /* reset, to be sure that the panel is in a valid state */ |
| taal_hw_reset(dssdev); |
| |
| free_regulators(td->panel_config->regulators, |
| td->panel_config->num_regulators); |
| |
| kfree(td); |
| } |
| |
| 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; |
| |
| 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(TCH, false); |
| |
| r = taal_sleep_out(td); |
| if (r) |
| goto err; |
| |
| r = taal_get_id(&id1, &id2, &id3); |
| if (r) |
| goto err; |
| |
| /* on early Taal revisions CABC is broken */ |
| if (td->panel_config->type == PANEL_TAAL && |
| (id2 == 0x00 || id2 == 0xff || id2 == 0x81)) |
| td->cabc_broken = true; |
| |
| r = taal_dcs_write_1(DCS_BRIGHTNESS, 0xff); |
| if (r) |
| goto err; |
| |
| r = taal_dcs_write_1(DCS_CTRL_DISPLAY, |
| (1<<2) | (1<<5)); /* BL | BCTRL */ |
| if (r) |
| goto err; |
| |
| r = taal_dcs_write_1(DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */ |
| if (r) |
| goto err; |
| |
| r = taal_set_addr_mode(td->rotate, td->mirror); |
| if (r) |
| goto err; |
| |
| if (!td->cabc_broken) { |
| r = taal_dcs_write_1(DCS_WRITE_CABC, td->cabc_mode); |
| if (r) |
| goto err; |
| } |
| |
| r = taal_dcs_write_0(DCS_DISPLAY_ON); |
| if (r) |
| goto err; |
| |
| r = _taal_enable_te(dssdev, td->te_enabled); |
| if (r) |
| goto err; |
| |
| td->enabled = 1; |
| |
| if (!td->intro_printed) { |
| dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n", |
| td->panel_config->name, 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(TCH, 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); |
| err0: |
| return r; |
| } |
| |
| static void taal_power_off(struct omap_dss_device *dssdev) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| int r; |
| |
| r = taal_dcs_write_0(DCS_DISPLAY_OFF); |
| if (!r) { |
| r = taal_sleep_in(td); |
| /* HACK: wait a bit so that the message goes through */ |
| msleep(10); |
| } |
| |
| if (r) { |
| dev_err(&dssdev->dev, |
| "error disabling panel, issuing HW reset\n"); |
| taal_hw_reset(dssdev); |
| } |
| |
| omapdss_dsi_display_disable(dssdev); |
| |
| td->enabled = 0; |
| } |
| |
| static int taal_enable(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; |
| |
| dev_dbg(&dssdev->dev, "enable\n"); |
| |
| mutex_lock(&td->lock); |
| |
| if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) { |
| r = -EINVAL; |
| goto err; |
| } |
| |
| dsi_bus_lock(); |
| |
| r = taal_power_on(dssdev); |
| |
| dsi_bus_unlock(); |
| |
| if (r) |
| goto err; |
| |
| if (panel_data->use_esd_check) |
| queue_delayed_work(td->esd_wq, &td->esd_work, |
| TAAL_ESD_CHECK_PERIOD); |
| |
| 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); |
| |
| cancel_delayed_work(&td->esd_work); |
| |
| dsi_bus_lock(); |
| |
| if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) |
| taal_power_off(dssdev); |
| |
| dsi_bus_unlock(); |
| |
| dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| |
| mutex_unlock(&td->lock); |
| } |
| |
| static int taal_suspend(struct omap_dss_device *dssdev) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| int r; |
| |
| dev_dbg(&dssdev->dev, "suspend\n"); |
| |
| mutex_lock(&td->lock); |
| |
| if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) { |
| r = -EINVAL; |
| goto err; |
| } |
| |
| cancel_delayed_work(&td->esd_work); |
| |
| dsi_bus_lock(); |
| |
| taal_power_off(dssdev); |
| |
| dsi_bus_unlock(); |
| |
| dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; |
| |
| mutex_unlock(&td->lock); |
| |
| return 0; |
| err: |
| mutex_unlock(&td->lock); |
| return r; |
| } |
| |
| static int taal_resume(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; |
| |
| dev_dbg(&dssdev->dev, "resume\n"); |
| |
| mutex_lock(&td->lock); |
| |
| if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) { |
| r = -EINVAL; |
| goto err; |
| } |
| |
| dsi_bus_lock(); |
| |
| r = taal_power_on(dssdev); |
| |
| dsi_bus_unlock(); |
| |
| if (r) { |
| dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| } else { |
| dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| if (panel_data->use_esd_check) |
| queue_delayed_work(td->esd_wq, &td->esd_work, |
| TAAL_ESD_CHECK_PERIOD); |
| } |
| |
| mutex_unlock(&td->lock); |
| |
| return r; |
| err: |
| mutex_unlock(&td->lock); |
| return r; |
| } |
| |
| 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(); |
| } |
| |
| 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, TCH, |
| td->update_region.x, |
| td->update_region.y, |
| td->update_region.w, |
| td->update_region.h, |
| taal_framedone_cb, dssdev); |
| if (r) |
| goto err; |
| } |
| |
| return IRQ_HANDLED; |
| err: |
| dev_err(&dssdev->dev, "start update failed\n"); |
| dsi_bus_unlock(); |
| 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(); |
| } |
| |
| 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); |
| struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); |
| int r; |
| |
| dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h); |
| |
| mutex_lock(&td->lock); |
| dsi_bus_lock(); |
| |
| if (!td->enabled) { |
| r = 0; |
| goto err; |
| } |
| |
| r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h, true); |
| if (r) |
| goto err; |
| |
| r = taal_set_update_window(x, y, w, h); |
| if (r) |
| goto err; |
| |
| if (td->te_enabled && panel_data->use_ext_te) { |
| td->update_region.x = x; |
| td->update_region.y = y; |
| td->update_region.w = w; |
| td->update_region.h = h; |
| barrier(); |
| schedule_delayed_work(&td->te_timeout_work, |
| msecs_to_jiffies(250)); |
| atomic_set(&td->do_update, 1); |
| } else { |
| r = omap_dsi_update(dssdev, TCH, x, y, w, h, |
| 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(); |
| 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(); |
| dsi_bus_unlock(); |
| 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); |
| struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); |
| int r; |
| |
| if (enable) |
| r = taal_dcs_write_1(DCS_TEAR_ON, 0); |
| else |
| r = taal_dcs_write_0(DCS_TEAR_OFF); |
| |
| if (!panel_data->use_ext_te) |
| omapdss_dsi_enable_te(dssdev, enable); |
| |
| if (td->panel_config->sleep.enable_te) |
| msleep(td->panel_config->sleep.enable_te); |
| |
| 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(); |
| |
| if (td->enabled) { |
| r = _taal_enable_te(dssdev, enable); |
| if (r) |
| goto err; |
| } |
| |
| td->te_enabled = enable; |
| |
| dsi_bus_unlock(); |
| end: |
| mutex_unlock(&td->lock); |
| |
| return 0; |
| err: |
| dsi_bus_unlock(); |
| 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_rotate(struct omap_dss_device *dssdev, u8 rotate) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| int r; |
| |
| dev_dbg(&dssdev->dev, "rotate %d\n", rotate); |
| |
| mutex_lock(&td->lock); |
| |
| if (td->rotate == rotate) |
| goto end; |
| |
| dsi_bus_lock(); |
| |
| if (td->enabled) { |
| r = taal_set_addr_mode(rotate, td->mirror); |
| if (r) |
| goto err; |
| } |
| |
| td->rotate = rotate; |
| |
| dsi_bus_unlock(); |
| end: |
| mutex_unlock(&td->lock); |
| return 0; |
| err: |
| dsi_bus_unlock(); |
| mutex_unlock(&td->lock); |
| return r; |
| } |
| |
| static u8 taal_get_rotate(struct omap_dss_device *dssdev) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| int r; |
| |
| mutex_lock(&td->lock); |
| r = td->rotate; |
| mutex_unlock(&td->lock); |
| |
| return r; |
| } |
| |
| static int taal_mirror(struct omap_dss_device *dssdev, bool enable) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| int r; |
| |
| dev_dbg(&dssdev->dev, "mirror %d\n", enable); |
| |
| mutex_lock(&td->lock); |
| |
| if (td->mirror == enable) |
| goto end; |
| |
| dsi_bus_lock(); |
| if (td->enabled) { |
| r = taal_set_addr_mode(td->rotate, enable); |
| if (r) |
| goto err; |
| } |
| |
| td->mirror = enable; |
| |
| dsi_bus_unlock(); |
| end: |
| mutex_unlock(&td->lock); |
| return 0; |
| err: |
| dsi_bus_unlock(); |
| mutex_unlock(&td->lock); |
| return r; |
| } |
| |
| static bool taal_get_mirror(struct omap_dss_device *dssdev) |
| { |
| struct taal_data *td = dev_get_drvdata(&dssdev->dev); |
| int r; |
| |
| mutex_lock(&td->lock); |
| r = td->mirror; |
| 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(); |
| |
| r = taal_dcs_read_1(DCS_GET_ID1, &id1); |
| if (r) |
| goto err2; |
| r = taal_dcs_read_1(DCS_GET_ID2, &id2); |
| if (r) |
| goto err2; |
| r = taal_dcs_read_1(DCS_GET_ID3, &id3); |
| if (r) |
| goto err2; |
| |
| dsi_bus_unlock(); |
| mutex_unlock(&td->lock); |
| return 0; |
| err2: |
| dsi_bus_unlock(); |
| 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(); |
| |
| /* 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(x, y, w, h); |
| |
| r = dsi_vc_set_max_rx_packet_size(TCH, plen); |
| if (r) |
| goto err2; |
| |
| while (buf_used < size) { |
| u8 dcs_cmd = first ? 0x2e : 0x3e; |
| first = 0; |
| |
| r = dsi_vc_dcs_read(TCH, 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(TCH, 1); |
| err2: |
| dsi_bus_unlock(); |
| err1: |
| mutex_unlock(&td->lock); |
| return r; |
| } |
| |
| 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; |
| struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev); |
| u8 state1, state2; |
| int r; |
| |
| mutex_lock(&td->lock); |
| |
| if (!td->enabled) { |
| mutex_unlock(&td->lock); |
| return; |
| } |
| |
| dsi_bus_lock(); |
| |
| r = taal_dcs_read_1(DCS_RDDSDR, &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(DCS_RDDSDR, &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 && panel_data->use_ext_te) { |
| r = taal_dcs_write_1(DCS_TEAR_ON, 0); |
| if (r) |
| goto err; |
| } |
| |
| dsi_bus_unlock(); |
| |
| queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD); |
| |
| mutex_unlock(&td->lock); |
| return; |
| err: |
| dev_err(&dssdev->dev, "performing LCD reset\n"); |
| |
| taal_power_off(dssdev); |
| taal_hw_reset(dssdev); |
| taal_power_on(dssdev); |
| |
| dsi_bus_unlock(); |
| |
| queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD); |
| |
| mutex_unlock(&td->lock); |
| } |
| |
| static int taal_set_update_mode(struct omap_dss_device *dssdev, |
| enum omap_dss_update_mode mode) |
| { |
| if (mode != OMAP_DSS_UPDATE_MANUAL) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static enum omap_dss_update_mode taal_get_update_mode( |
| struct omap_dss_device *dssdev) |
| { |
| return OMAP_DSS_UPDATE_MANUAL; |
| } |
| |
| static struct omap_dss_driver taal_driver = { |
| .probe = taal_probe, |
| .remove = taal_remove, |
| |
| .enable = taal_enable, |
| .disable = taal_disable, |
| .suspend = taal_suspend, |
| .resume = taal_resume, |
| |
| .set_update_mode = taal_set_update_mode, |
| .get_update_mode = taal_get_update_mode, |
| |
| .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, |
| |
| .set_rotate = taal_rotate, |
| .get_rotate = taal_get_rotate, |
| .set_mirror = taal_mirror, |
| .get_mirror = taal_get_mirror, |
| .run_test = taal_run_test, |
| .memory_read = taal_memory_read, |
| |
| .get_timings = taal_get_timings, |
| |
| .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"); |