--- /dev/null
+/*
+ * 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/completion.h>
+#include <linux/workqueue.h>
+
+#include <plat/display.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_USE_ESD_CHECK */
+#define TAAL_ESD_CHECK_PERIOD msecs_to_jiffies(5000)
+
+struct taal_data {
+ 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;
+ bool use_ext_te;
+ struct completion te_completion;
+
+ bool use_dsi_bl;
+
+ bool cabc_broken;
+ unsigned cabc_mode;
+
+ bool intro_printed;
+
+ struct workqueue_struct *esd_wq;
+ struct delayed_work esd_work;
+};
+
+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);
+
+ msleep(5);
+
+ 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);
+
+ msleep(5);
+
+ 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);
+ 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);
+
+ if (td->use_dsi_bl) {
+ if (td->enabled) {
+ dsi_bus_lock();
+ r = taal_dcs_write_1(DCS_BRIGHTNESS, level);
+ dsi_bus_unlock();
+ if (r)
+ return r;
+ }
+ } else {
+ if (!dssdev->set_backlight)
+ return -EINVAL;
+
+ r = dssdev->set_backlight(dssdev, level);
+ if (r)
+ return r;
+ }
+
+ return 0;
+}
+
+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 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 irqreturn_t taal_te_isr(int irq, void *data)
+{
+ struct omap_dss_device *dssdev = data;
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+
+ complete_all(&td->te_completion);
+
+ return IRQ_HANDLED;
+}
+
+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;
+
+ if (td->enabled) {
+ dsi_bus_lock();
+ r = taal_dcs_read_1(DCS_READ_NUM_ERRORS, &errors);
+ dsi_bus_unlock();
+ } else {
+ r = -ENODEV;
+ }
+
+ 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;
+
+ if (td->enabled) {
+ dsi_bus_lock();
+ r = taal_get_id(&id1, &id2, &id3);
+ dsi_bus_unlock();
+ } else {
+ r = -ENODEV;
+ }
+
+ 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;
+
+ 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;
+
+ 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 int taal_probe(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td;
+ struct backlight_device *bldev;
+ int r;
+
+ const struct omap_video_timings taal_panel_timings = {
+ .x_res = 864,
+ .y_res = 480,
+ };
+
+ dev_dbg(&dssdev->dev, "probe\n");
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT;
+ dssdev->panel.timings = taal_panel_timings;
+ dssdev->ctrl.pixel_size = 24;
+
+ td = kzalloc(sizeof(*td), GFP_KERNEL);
+ if (!td) {
+ r = -ENOMEM;
+ goto err0;
+ }
+ td->dssdev = dssdev;
+
+ 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 err2;
+ }
+ INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
+
+ dev_set_drvdata(&dssdev->dev, td);
+
+ dssdev->get_timings = taal_get_timings;
+ dssdev->get_resolution = taal_get_resolution;
+
+ /* if no platform set_backlight() defined, presume DSI backlight
+ * control */
+ if (!dssdev->set_backlight)
+ td->use_dsi_bl = true;
+
+ bldev = backlight_device_register("taal", &dssdev->dev, dssdev,
+ &taal_bl_ops);
+ if (IS_ERR(bldev)) {
+ r = PTR_ERR(bldev);
+ goto err1;
+ }
+
+ td->bldev = bldev;
+
+ bldev->props.fb_blank = FB_BLANK_UNBLANK;
+ bldev->props.power = FB_BLANK_UNBLANK;
+ if (td->use_dsi_bl) {
+ bldev->props.max_brightness = 255;
+ bldev->props.brightness = 255;
+ } else {
+ bldev->props.max_brightness = 127;
+ bldev->props.brightness = 127;
+ }
+
+ taal_bl_update_status(bldev);
+
+ if (dssdev->phy.dsi.ext_te) {
+ int gpio = dssdev->phy.dsi.ext_te_gpio;
+
+ r = gpio_request(gpio, "taal irq");
+ if (r) {
+ dev_err(&dssdev->dev, "GPIO request failed\n");
+ goto err3;
+ }
+
+ 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 err3;
+ }
+
+ init_completion(&td->te_completion);
+
+ td->use_ext_te = true;
+ }
+
+ r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
+ if (r) {
+ dev_err(&dssdev->dev, "failed to create sysfs files\n");
+ goto err4;
+ }
+
+ return 0;
+err4:
+ if (td->use_ext_te) {
+ int gpio = dssdev->phy.dsi.ext_te_gpio;
+ free_irq(gpio_to_irq(gpio), dssdev);
+ gpio_free(gpio);
+ }
+err3:
+ backlight_device_unregister(bldev);
+err2:
+ cancel_delayed_work_sync(&td->esd_work);
+ destroy_workqueue(td->esd_wq);
+err1:
+ kfree(td);
+err0:
+ return r;
+}
+
+static void 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);
+
+ if (td->use_ext_te) {
+ int gpio = dssdev->phy.dsi.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_sync(&td->esd_work);
+ destroy_workqueue(td->esd_wq);
+
+ kfree(td);
+}
+
+static int taal_enable(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ u8 id1, id2, id3;
+ int r;
+
+ dev_dbg(&dssdev->dev, "enable\n");
+
+ if (dssdev->platform_enable) {
+ r = dssdev->platform_enable(dssdev);
+ if (r)
+ return r;
+ }
+
+ /* it seems we have to wait a bit until taal is ready */
+ msleep(5);
+
+ r = taal_sleep_out(td);
+ if (r)
+ goto err;
+
+ r = taal_get_id(&id1, &id2, &id3);
+ if (r)
+ goto err;
+
+ /* on early revisions CABC is broken */
+ if (id2 == 0x00 || id2 == 0xff || id2 == 0x81)
+ td->cabc_broken = true;
+
+ taal_dcs_write_1(DCS_BRIGHTNESS, 0xff);
+ taal_dcs_write_1(DCS_CTRL_DISPLAY, (1<<2) | (1<<5)); /* BL | BCTRL */
+
+ taal_dcs_write_1(DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */
+
+ taal_set_addr_mode(td->rotate, td->mirror);
+ if (!td->cabc_broken)
+ taal_dcs_write_1(DCS_WRITE_CABC, td->cabc_mode);
+
+ taal_dcs_write_0(DCS_DISPLAY_ON);
+
+#ifdef TAAL_USE_ESD_CHECK
+ queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
+#endif
+
+ td->enabled = 1;
+
+ if (!td->intro_printed) {
+ dev_info(&dssdev->dev, "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;
+ }
+
+ return 0;
+err:
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+
+ 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");
+
+ cancel_delayed_work(&td->esd_work);
+
+ taal_dcs_write_0(DCS_DISPLAY_OFF);
+ taal_sleep_in(td);
+
+ /* wait a bit so that the message goes through */
+ msleep(10);
+
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+
+ td->enabled = 0;
+}
+
+static int taal_suspend(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ struct backlight_device *bldev = td->bldev;
+
+ bldev->props.power = FB_BLANK_POWERDOWN;
+ taal_bl_update_status(bldev);
+
+ return 0;
+}
+
+static int taal_resume(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ struct backlight_device *bldev = td->bldev;
+
+ bldev->props.power = FB_BLANK_UNBLANK;
+ taal_bl_update_status(bldev);
+
+ return 0;
+}
+
+static void taal_setup_update(struct omap_dss_device *dssdev,
+ u16 x, u16 y, u16 w, u16 h)
+{
+ taal_set_update_window(x, y, w, h);
+}
+
+static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ int r;
+
+ td->te_enabled = enable;
+
+ if (enable)
+ r = taal_dcs_write_1(DCS_TEAR_ON, 0);
+ else
+ r = taal_dcs_write_0(DCS_TEAR_OFF);
+
+ return r;
+}
+
+static int taal_wait_te(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ long wait = msecs_to_jiffies(500);
+
+ if (!td->use_ext_te || !td->te_enabled)
+ return 0;
+
+ INIT_COMPLETION(td->te_completion);
+ wait = wait_for_completion_timeout(&td->te_completion, wait);
+ if (wait == 0) {
+ dev_err(&dssdev->dev, "timeout waiting TE\n");
+ return -ETIME;
+ }
+
+ return 0;
+}
+
+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);
+
+ if (td->enabled) {
+ r = taal_set_addr_mode(rotate, td->mirror);
+
+ if (r)
+ return r;
+ }
+
+ td->rotate = rotate;
+
+ return 0;
+}
+
+static u8 taal_get_rotate(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ return td->rotate;
+}
+
+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);
+
+ if (td->enabled) {
+ r = taal_set_addr_mode(td->rotate, enable);
+
+ if (r)
+ return r;
+ }
+
+ td->mirror = enable;
+
+ return 0;
+}
+
+static bool taal_get_mirror(struct omap_dss_device *dssdev)
+{
+ struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+ return td->mirror;
+}
+
+static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
+{
+ u8 id1, id2, 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_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;
+
+ if (size < w * h * 3)
+ return -ENOMEM;
+
+ size = min(w * h * 3,
+ dssdev->panel.timings.x_res *
+ dssdev->panel.timings.y_res * 3);
+
+ /* 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_setup_update(dssdev, x, y, w, h);
+
+ r = dsi_vc_set_max_rx_packet_size(TCH, plen);
+ if (r)
+ return r;
+
+ 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 err;
+ }
+
+ 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 err;
+ }
+ }
+
+ r = buf_used;
+
+err:
+ dsi_vc_set_max_rx_packet_size(TCH, 1);
+
+ 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;
+ u8 state1, state2;
+ int r;
+
+ if (!td->enabled)
+ 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->use_ext_te && td->te_enabled)
+ taal_enable_te(dssdev, true);
+
+ dsi_bus_unlock();
+
+ queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
+
+ return;
+err:
+ dev_err(&dssdev->dev, "performing LCD reset\n");
+
+ taal_disable(dssdev);
+ taal_enable(dssdev);
+
+ dsi_bus_unlock();
+
+ queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
+}
+
+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,
+
+ .setup_update = taal_setup_update,
+ .enable_te = taal_enable_te,
+ .wait_for_te = taal_wait_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,
+
+ .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");
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff