--- /dev/null
+/*
+ * Sony ACX565AKM LCD Panel driver
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Original Driver Author: Imre Deak <imre.deak@nokia.com>
+ * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@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/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+
+#include <video/omapdss.h>
+#include <video/omap-panel-data.h>
+
+#define MIPID_CMD_READ_DISP_ID 0x04
+#define MIPID_CMD_READ_RED 0x06
+#define MIPID_CMD_READ_GREEN 0x07
+#define MIPID_CMD_READ_BLUE 0x08
+#define MIPID_CMD_READ_DISP_STATUS 0x09
+#define MIPID_CMD_RDDSDR 0x0F
+#define MIPID_CMD_SLEEP_IN 0x10
+#define MIPID_CMD_SLEEP_OUT 0x11
+#define MIPID_CMD_DISP_OFF 0x28
+#define MIPID_CMD_DISP_ON 0x29
+#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
+#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
+#define MIPID_CMD_WRITE_CTRL_DISP 0x53
+
+#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5)
+#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
+#define CTRL_DISP_BACKLIGHT_ON (1 << 2)
+#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1)
+
+#define MIPID_CMD_READ_CTRL_DISP 0x54
+#define MIPID_CMD_WRITE_CABC 0x55
+#define MIPID_CMD_READ_CABC 0x56
+
+#define MIPID_VER_LPH8923 3
+#define MIPID_VER_LS041Y3 4
+#define MIPID_VER_L4F00311 8
+#define MIPID_VER_ACX565AKM 9
+
+struct panel_drv_data {
+ struct omap_dss_device dssdev;
+ struct omap_dss_device *in;
+
+ int reset_gpio;
+ int datapairs;
+
+ struct omap_video_timings videomode;
+
+ char *name;
+ int enabled;
+ int model;
+ int revision;
+ u8 display_id[3];
+ unsigned has_bc:1;
+ unsigned has_cabc:1;
+ unsigned cabc_mode;
+ 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 spi_device *spi;
+ struct mutex mutex;
+
+ struct backlight_device *bl_dev;
+};
+
+static const struct omap_video_timings acx565akm_panel_timings = {
+ .x_res = 800,
+ .y_res = 480,
+ .pixelclock = 24000000,
+ .hfp = 28,
+ .hsw = 4,
+ .hbp = 24,
+ .vfp = 3,
+ .vsw = 3,
+ .vbp = 4,
+
+ .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
+ .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
+
+ .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
+ .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
+ .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
+};
+
+#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
+
+static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
+ const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
+{
+ struct spi_message m;
+ struct spi_transfer *x, xfer[5];
+ int r;
+
+ BUG_ON(ddata->spi == NULL);
+
+ spi_message_init(&m);
+
+ memset(xfer, 0, sizeof(xfer));
+ x = &xfer[0];
+
+ cmd &= 0xff;
+ x->tx_buf = &cmd;
+ x->bits_per_word = 9;
+ x->len = 2;
+
+ if (rlen > 1 && wlen == 0) {
+ /*
+ * Between the command and the response data there is a
+ * dummy clock cycle. Add an extra bit after the command
+ * word to account for this.
+ */
+ x->bits_per_word = 10;
+ cmd <<= 1;
+ }
+ spi_message_add_tail(x, &m);
+
+ if (wlen) {
+ x++;
+ x->tx_buf = wbuf;
+ x->len = wlen;
+ x->bits_per_word = 9;
+ spi_message_add_tail(x, &m);
+ }
+
+ if (rlen) {
+ x++;
+ x->rx_buf = rbuf;
+ x->len = rlen;
+ spi_message_add_tail(x, &m);
+ }
+
+ r = spi_sync(ddata->spi, &m);
+ if (r < 0)
+ dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
+}
+
+static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
+{
+ acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
+}
+
+static inline void acx565akm_write(struct panel_drv_data *ddata,
+ int reg, const u8 *buf, int len)
+{
+ acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
+}
+
+static inline void acx565akm_read(struct panel_drv_data *ddata,
+ int reg, u8 *buf, int len)
+{
+ acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
+}
+
+static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
+{
+ ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
+ ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
+}
+
+static void hw_guard_wait(struct panel_drv_data *ddata)
+{
+ unsigned long wait = ddata->hw_guard_end - jiffies;
+
+ if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(wait);
+ }
+}
+
+static void set_sleep_mode(struct panel_drv_data *ddata, int on)
+{
+ int cmd;
+
+ if (on)
+ cmd = MIPID_CMD_SLEEP_IN;
+ else
+ cmd = MIPID_CMD_SLEEP_OUT;
+ /*
+ * We have to keep 120msec between sleep in/out commands.
+ * (8.2.15, 8.2.16).
+ */
+ hw_guard_wait(ddata);
+ acx565akm_cmd(ddata, cmd);
+ hw_guard_start(ddata, 120);
+}
+
+static void set_display_state(struct panel_drv_data *ddata, int enabled)
+{
+ int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
+
+ acx565akm_cmd(ddata, cmd);
+}
+
+static int panel_enabled(struct panel_drv_data *ddata)
+{
+ u32 disp_status;
+ int enabled;
+
+ acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
+ (u8 *)&disp_status, 4);
+ disp_status = __be32_to_cpu(disp_status);
+ enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
+ dev_dbg(&ddata->spi->dev,
+ "LCD panel %senabled by bootloader (status 0x%04x)\n",
+ enabled ? "" : "not ", disp_status);
+ return enabled;
+}
+
+static int panel_detect(struct panel_drv_data *ddata)
+{
+ acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
+ dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
+ ddata->display_id[0],
+ ddata->display_id[1],
+ ddata->display_id[2]);
+
+ switch (ddata->display_id[0]) {
+ case 0x10:
+ ddata->model = MIPID_VER_ACX565AKM;
+ ddata->name = "acx565akm";
+ ddata->has_bc = 1;
+ ddata->has_cabc = 1;
+ break;
+ case 0x29:
+ ddata->model = MIPID_VER_L4F00311;
+ ddata->name = "l4f00311";
+ break;
+ case 0x45:
+ ddata->model = MIPID_VER_LPH8923;
+ ddata->name = "lph8923";
+ break;
+ case 0x83:
+ ddata->model = MIPID_VER_LS041Y3;
+ ddata->name = "ls041y3";
+ break;
+ default:
+ ddata->name = "unknown";
+ dev_err(&ddata->spi->dev, "invalid display ID\n");
+ return -ENODEV;
+ }
+
+ ddata->revision = ddata->display_id[1];
+
+ dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
+ ddata->name, ddata->revision);
+
+ return 0;
+}
+
+/*----------------------Backlight Control-------------------------*/
+
+static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
+{
+ u16 ctrl;
+
+ acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
+ if (enable) {
+ ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
+ CTRL_DISP_BACKLIGHT_ON;
+ } else {
+ ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
+ CTRL_DISP_BACKLIGHT_ON);
+ }
+
+ ctrl |= 1 << 8;
+ acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
+}
+
+static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
+{
+ u16 cabc_ctrl;
+
+ ddata->cabc_mode = mode;
+ if (!ddata->enabled)
+ return;
+ cabc_ctrl = 0;
+ acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
+ cabc_ctrl &= ~3;
+ cabc_ctrl |= (1 << 8) | (mode & 3);
+ acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
+}
+
+static unsigned get_cabc_mode(struct panel_drv_data *ddata)
+{
+ return ddata->cabc_mode;
+}
+
+static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
+{
+ u8 cabc_ctrl;
+
+ acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
+ return cabc_ctrl & 3;
+}
+
+static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
+{
+ int bv;
+
+ bv = level | (1 << 8);
+ acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
+
+ if (level)
+ enable_backlight_ctrl(ddata, 1);
+ else
+ enable_backlight_ctrl(ddata, 0);
+}
+
+static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
+{
+ u8 bv;
+
+ acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
+
+ return bv;
+}
+
+
+static int acx565akm_bl_update_status(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+ int level;
+
+ dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+ if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+ dev->props.power == FB_BLANK_UNBLANK)
+ level = dev->props.brightness;
+ else
+ level = 0;
+
+ if (ddata->has_bc)
+ acx565akm_set_brightness(ddata, level);
+ else
+ return -ENODEV;
+
+ return 0;
+}
+
+static int acx565akm_bl_get_intensity(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+
+ dev_dbg(&dev->dev, "%s\n", __func__);
+
+ if (!ddata->has_bc)
+ return -ENODEV;
+
+ if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+ dev->props.power == FB_BLANK_UNBLANK) {
+ if (ddata->has_bc)
+ return acx565akm_get_actual_brightness(ddata);
+ else
+ return dev->props.brightness;
+ }
+
+ return 0;
+}
+
+static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+ int r;
+
+ mutex_lock(&ddata->mutex);
+ r = acx565akm_bl_update_status(dev);
+ mutex_unlock(&ddata->mutex);
+
+ return r;
+}
+
+static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+ int r;
+
+ mutex_lock(&ddata->mutex);
+ r = acx565akm_bl_get_intensity(dev);
+ mutex_unlock(&ddata->mutex);
+
+ return r;
+}
+
+static const struct backlight_ops acx565akm_bl_ops = {
+ .get_brightness = acx565akm_bl_get_intensity_locked,
+ .update_status = acx565akm_bl_update_status_locked,
+};
+
+/*--------------------Auto Brightness control via Sysfs---------------------*/
+
+static const char * const cabc_modes[] = {
+ "off", /* always used 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 panel_drv_data *ddata = dev_get_drvdata(dev);
+ const char *mode_str;
+ int mode;
+ int len;
+
+ if (!ddata->has_cabc)
+ mode = 0;
+ else
+ mode = get_cabc_mode(ddata);
+ 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 panel_drv_data *ddata = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
+ const char *mode_str = cabc_modes[i];
+ int cmp_len = strlen(mode_str);
+
+ if (count > 0 && buf[count - 1] == '\n')
+ count--;
+ if (count != cmp_len)
+ continue;
+
+ if (strncmp(buf, mode_str, cmp_len) == 0)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(cabc_modes))
+ return -EINVAL;
+
+ if (!ddata->has_cabc && i != 0)
+ return -EINVAL;
+
+ mutex_lock(&ddata->mutex);
+ set_cabc_mode(ddata, i);
+ mutex_unlock(&ddata->mutex);
+
+ return count;
+}
+
+static ssize_t show_cabc_available_modes(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(dev);
+ int len;
+ int i;
+
+ if (!ddata->has_cabc)
+ return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
+
+ 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(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 *bldev_attrs[] = {
+ &dev_attr_cabc_mode.attr,
+ &dev_attr_cabc_available_modes.attr,
+ NULL,
+};
+
+static struct attribute_group bldev_attr_group = {
+ .attrs = bldev_attrs,
+};
+
+static int acx565akm_connect(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+ int r;
+
+ if (omapdss_device_is_connected(dssdev))
+ return 0;
+
+ r = in->ops.sdi->connect(in, dssdev);
+ if (r)
+ return r;
+
+ return 0;
+}
+
+static void acx565akm_disconnect(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ if (!omapdss_device_is_connected(dssdev))
+ return;
+
+ in->ops.sdi->disconnect(in, dssdev);
+}
+
+static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+ int r;
+
+ dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+ in->ops.sdi->set_timings(in, &ddata->videomode);
+
+ if (ddata->datapairs > 0)
+ in->ops.sdi->set_datapairs(in, ddata->datapairs);
+
+ r = in->ops.sdi->enable(in);
+ if (r) {
+ pr_err("%s sdi enable failed\n", __func__);
+ return r;
+ }
+
+ /*FIXME tweak me */
+ msleep(50);
+
+ if (gpio_is_valid(ddata->reset_gpio))
+ gpio_set_value(ddata->reset_gpio, 1);
+
+ if (ddata->enabled) {
+ dev_dbg(&ddata->spi->dev, "panel already enabled\n");
+ return 0;
+ }
+
+ /*
+ * We have to meet all the following delay requirements:
+ * 1. tRW: reset pulse width 10usec (7.12.1)
+ * 2. tRT: reset cancel time 5msec (7.12.1)
+ * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
+ * case (7.6.2)
+ * 4. 120msec before the sleep out command (7.12.1)
+ */
+ msleep(120);
+
+ set_sleep_mode(ddata, 0);
+ ddata->enabled = 1;
+
+ /* 5msec between sleep out and the next command. (8.2.16) */
+ usleep_range(5000, 10000);
+ set_display_state(ddata, 1);
+ set_cabc_mode(ddata, ddata->cabc_mode);
+
+ return acx565akm_bl_update_status(ddata->bl_dev);
+}
+
+static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ dev_dbg(dssdev->dev, "%s\n", __func__);
+
+ if (!ddata->enabled)
+ return;
+
+ set_display_state(ddata, 0);
+ set_sleep_mode(ddata, 1);
+ ddata->enabled = 0;
+ /*
+ * We have to provide PCLK,HS,VS signals for 2 frames (worst case
+ * ~50msec) after sending the sleep in command and asserting the
+ * reset signal. We probably could assert the reset w/o the delay
+ * but we still delay to avoid possible artifacts. (7.6.1)
+ */
+ msleep(50);
+
+ if (gpio_is_valid(ddata->reset_gpio))
+ gpio_set_value(ddata->reset_gpio, 0);
+
+ /* FIXME need to tweak this delay */
+ msleep(100);
+
+ in->ops.sdi->disable(in);
+}
+
+static int acx565akm_enable(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ int r;
+
+ dev_dbg(dssdev->dev, "%s\n", __func__);
+
+ if (!omapdss_device_is_connected(dssdev))
+ return -ENODEV;
+
+ if (omapdss_device_is_enabled(dssdev))
+ return 0;
+
+ mutex_lock(&ddata->mutex);
+ r = acx565akm_panel_power_on(dssdev);
+ mutex_unlock(&ddata->mutex);
+ if (r)
+ return r;
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ return 0;
+}
+
+static void acx565akm_disable(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+ dev_dbg(dssdev->dev, "%s\n", __func__);
+
+ if (!omapdss_device_is_enabled(dssdev))
+ return;
+
+ mutex_lock(&ddata->mutex);
+ acx565akm_panel_power_off(dssdev);
+ mutex_unlock(&ddata->mutex);
+
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void acx565akm_set_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ ddata->videomode = *timings;
+ dssdev->panel.timings = *timings;
+
+ in->ops.sdi->set_timings(in, timings);
+}
+
+static void acx565akm_get_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+ *timings = ddata->videomode;
+}
+
+static int acx565akm_check_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ return in->ops.sdi->check_timings(in, timings);
+}
+
+static struct omap_dss_driver acx565akm_ops = {
+ .connect = acx565akm_connect,
+ .disconnect = acx565akm_disconnect,
+
+ .enable = acx565akm_enable,
+ .disable = acx565akm_disable,
+
+ .set_timings = acx565akm_set_timings,
+ .get_timings = acx565akm_get_timings,
+ .check_timings = acx565akm_check_timings,
+
+ .get_resolution = omapdss_default_get_resolution,
+};
+
+static int acx565akm_probe_pdata(struct spi_device *spi)
+{
+ const struct panel_acx565akm_platform_data *pdata;
+ struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+ struct omap_dss_device *dssdev, *in;
+
+ pdata = dev_get_platdata(&spi->dev);
+
+ ddata->reset_gpio = pdata->reset_gpio;
+
+ in = omap_dss_find_output(pdata->source);
+ if (in == NULL) {
+ dev_err(&spi->dev, "failed to find video source '%s'\n",
+ pdata->source);
+ return -EPROBE_DEFER;
+ }
+ ddata->in = in;
+
+ ddata->datapairs = pdata->datapairs;
+
+ dssdev = &ddata->dssdev;
+ dssdev->name = pdata->name;
+
+ return 0;
+}
+
+static int acx565akm_probe_of(struct spi_device *spi)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+ struct device_node *np = spi->dev.of_node;
+
+ ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
+
+ ddata->in = omapdss_of_find_source_for_first_ep(np);
+ if (IS_ERR(ddata->in)) {
+ dev_err(&spi->dev, "failed to find video source\n");
+ return PTR_ERR(ddata->in);
+ }
+
+ return 0;
+}
+
+static int acx565akm_probe(struct spi_device *spi)
+{
+ struct panel_drv_data *ddata;
+ struct omap_dss_device *dssdev;
+ struct backlight_device *bldev;
+ int max_brightness, brightness;
+ struct backlight_properties props;
+ int r;
+
+ dev_dbg(&spi->dev, "%s\n", __func__);
+
+ spi->mode = SPI_MODE_3;
+
+ ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
+ if (ddata == NULL)
+ return -ENOMEM;
+
+ dev_set_drvdata(&spi->dev, ddata);
+
+ ddata->spi = spi;
+
+ mutex_init(&ddata->mutex);
+
+ if (dev_get_platdata(&spi->dev)) {
+ r = acx565akm_probe_pdata(spi);
+ if (r)
+ return r;
+ } else if (spi->dev.of_node) {
+ r = acx565akm_probe_of(spi);
+ if (r)
+ return r;
+ } else {
+ dev_err(&spi->dev, "platform data missing!\n");
+ return -ENODEV;
+ }
+
+ if (gpio_is_valid(ddata->reset_gpio)) {
+ r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
+ GPIOF_OUT_INIT_LOW, "lcd reset");
+ if (r)
+ goto err_gpio;
+ }
+
+ if (gpio_is_valid(ddata->reset_gpio))
+ gpio_set_value(ddata->reset_gpio, 1);
+
+ /*
+ * After reset we have to wait 5 msec before the first
+ * command can be sent.
+ */
+ usleep_range(5000, 10000);
+
+ ddata->enabled = panel_enabled(ddata);
+
+ r = panel_detect(ddata);
+
+ if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
+ gpio_set_value(ddata->reset_gpio, 0);
+
+ if (r) {
+ dev_err(&spi->dev, "%s panel detect error\n", __func__);
+ goto err_detect;
+ }
+
+ memset(&props, 0, sizeof(props));
+ props.fb_blank = FB_BLANK_UNBLANK;
+ props.power = FB_BLANK_UNBLANK;
+ props.type = BACKLIGHT_RAW;
+
+ bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
+ ddata, &acx565akm_bl_ops, &props);
+ if (IS_ERR(bldev)) {
+ r = PTR_ERR(bldev);
+ goto err_reg_bl;
+ }
+ ddata->bl_dev = bldev;
+ if (ddata->has_cabc) {
+ r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
+ if (r) {
+ dev_err(&bldev->dev,
+ "%s failed to create sysfs files\n", __func__);
+ goto err_sysfs;
+ }
+ ddata->cabc_mode = get_hw_cabc_mode(ddata);
+ }
+
+ max_brightness = 255;
+
+ if (ddata->has_bc)
+ brightness = acx565akm_get_actual_brightness(ddata);
+ else
+ brightness = 0;
+
+ bldev->props.max_brightness = max_brightness;
+ bldev->props.brightness = brightness;
+
+ acx565akm_bl_update_status(bldev);
+
+
+ ddata->videomode = acx565akm_panel_timings;
+
+ dssdev = &ddata->dssdev;
+ dssdev->dev = &spi->dev;
+ dssdev->driver = &acx565akm_ops;
+ dssdev->type = OMAP_DISPLAY_TYPE_SDI;
+ dssdev->owner = THIS_MODULE;
+ dssdev->panel.timings = ddata->videomode;
+
+ r = omapdss_register_display(dssdev);
+ if (r) {
+ dev_err(&spi->dev, "Failed to register panel\n");
+ goto err_reg;
+ }
+
+ return 0;
+
+err_reg:
+ sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
+err_sysfs:
+ backlight_device_unregister(bldev);
+err_reg_bl:
+err_detect:
+err_gpio:
+ omap_dss_put_device(ddata->in);
+ return r;
+}
+
+static int acx565akm_remove(struct spi_device *spi)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+ struct omap_dss_device *dssdev = &ddata->dssdev;
+ struct omap_dss_device *in = ddata->in;
+
+ dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+ sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
+ backlight_device_unregister(ddata->bl_dev);
+
+ omapdss_unregister_display(dssdev);
+
+ acx565akm_disable(dssdev);
+ acx565akm_disconnect(dssdev);
+
+ omap_dss_put_device(in);
+
+ return 0;
+}
+
+static const struct of_device_id acx565akm_of_match[] = {
+ { .compatible = "omapdss,sony,acx565akm", },
+ {},
+};
+
+static struct spi_driver acx565akm_driver = {
+ .driver = {
+ .name = "acx565akm",
+ .owner = THIS_MODULE,
+ .of_match_table = acx565akm_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = acx565akm_probe,
+ .remove = acx565akm_remove,
+};
+
+module_spi_driver(acx565akm_driver);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("acx565akm LCD Driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff