diff options
Diffstat (limited to 'drivers/video/fbdev/omap2/displays-new/panel-dsi-cm.c')
| -rw-r--r-- | drivers/video/fbdev/omap2/displays-new/panel-dsi-cm.c | 1388 |
1 files changed, 0 insertions, 1388 deletions
diff --git a/drivers/video/fbdev/omap2/displays-new/panel-dsi-cm.c b/drivers/video/fbdev/omap2/displays-new/panel-dsi-cm.c deleted file mode 100644 index 3414c2609320..000000000000 --- a/drivers/video/fbdev/omap2/displays-new/panel-dsi-cm.c +++ /dev/null @@ -1,1388 +0,0 @@ -/* - * Generic DSI Command Mode panel driver - * - * Copyright (C) 2013 Texas Instruments - * Author: Tomi Valkeinen <tomi.valkeinen@ti.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. - */ - -/* #define DEBUG */ - -#include <linux/backlight.h> -#include <linux/delay.h> -#include <linux/fb.h> -#include <linux/gpio.h> -#include <linux/interrupt.h> -#include <linux/jiffies.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/workqueue.h> -#include <linux/of_device.h> -#include <linux/of_gpio.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_GET_ID1 0xda -#define DCS_GET_ID2 0xdb -#define DCS_GET_ID3 0xdc - -struct panel_drv_data { - struct omap_dss_device dssdev; - struct omap_dss_device *in; - - struct omap_video_timings timings; - - struct platform_device *pdev; - - 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 */ - - /* 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 intro_printed; - - struct workqueue_struct *workqueue; - - bool ulps_enabled; - unsigned ulps_timeout; - struct delayed_work ulps_work; -}; - -#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) - -static irqreturn_t dsicm_te_isr(int irq, void *data); -static void dsicm_te_timeout_work_callback(struct work_struct *work); -static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable); - -static int dsicm_panel_reset(struct panel_drv_data *ddata); - -static void dsicm_ulps_work(struct work_struct *work); - -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 int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data) -{ - struct omap_dss_device *in = ddata->in; - int r; - u8 buf[1]; - - r = in->ops.dsi->dcs_read(in, ddata->channel, dcs_cmd, buf, 1); - - if (r < 0) - return r; - - *data = buf[0]; - - return 0; -} - -static int dsicm_dcs_write_0(struct panel_drv_data *ddata, u8 dcs_cmd) -{ - struct omap_dss_device *in = ddata->in; - return in->ops.dsi->dcs_write(in, ddata->channel, &dcs_cmd, 1); -} - -static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param) -{ - struct omap_dss_device *in = ddata->in; - u8 buf[2] = { dcs_cmd, param }; - - return in->ops.dsi->dcs_write(in, ddata->channel, buf, 2); -} - -static int dsicm_sleep_in(struct panel_drv_data *ddata) - -{ - struct omap_dss_device *in = ddata->in; - u8 cmd; - int r; - - hw_guard_wait(ddata); - - cmd = MIPI_DCS_ENTER_SLEEP_MODE; - r = in->ops.dsi->dcs_write_nosync(in, ddata->channel, &cmd, 1); - if (r) - return r; - - hw_guard_start(ddata, 120); - - usleep_range(5000, 10000); - - return 0; -} - -static int dsicm_sleep_out(struct panel_drv_data *ddata) -{ - int r; - - hw_guard_wait(ddata); - - r = dsicm_dcs_write_0(ddata, MIPI_DCS_EXIT_SLEEP_MODE); - if (r) - return r; - - hw_guard_start(ddata, 120); - - usleep_range(5000, 10000); - - return 0; -} - -static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3) -{ - int r; - - r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1); - if (r) - return r; - r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2); - if (r) - return r; - r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3); - if (r) - return r; - - return 0; -} - -static int dsicm_set_update_window(struct panel_drv_data *ddata, - u16 x, u16 y, u16 w, u16 h) -{ - struct omap_dss_device *in = ddata->in; - 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 = in->ops.dsi->dcs_write_nosync(in, ddata->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 = in->ops.dsi->dcs_write_nosync(in, ddata->channel, buf, sizeof(buf)); - if (r) - return r; - - in->ops.dsi->bta_sync(in, ddata->channel); - - return r; -} - -static void dsicm_queue_ulps_work(struct panel_drv_data *ddata) -{ - if (ddata->ulps_timeout > 0) - queue_delayed_work(ddata->workqueue, &ddata->ulps_work, - msecs_to_jiffies(ddata->ulps_timeout)); -} - -static void dsicm_cancel_ulps_work(struct panel_drv_data *ddata) -{ - cancel_delayed_work(&ddata->ulps_work); -} - -static int dsicm_enter_ulps(struct panel_drv_data *ddata) -{ - struct omap_dss_device *in = ddata->in; - int r; - - if (ddata->ulps_enabled) - return 0; - - dsicm_cancel_ulps_work(ddata); - - r = _dsicm_enable_te(ddata, false); - if (r) - goto err; - - if (gpio_is_valid(ddata->ext_te_gpio)) - disable_irq(gpio_to_irq(ddata->ext_te_gpio)); - - in->ops.dsi->disable(in, false, true); - - ddata->ulps_enabled = true; - - return 0; - -err: - dev_err(&ddata->pdev->dev, "enter ULPS failed"); - dsicm_panel_reset(ddata); - - ddata->ulps_enabled = false; - - dsicm_queue_ulps_work(ddata); - - return r; -} - -static int dsicm_exit_ulps(struct panel_drv_data *ddata) -{ - struct omap_dss_device *in = ddata->in; - int r; - - if (!ddata->ulps_enabled) - return 0; - - r = in->ops.dsi->enable(in); - if (r) { - dev_err(&ddata->pdev->dev, "failed to enable DSI\n"); - goto err1; - } - - in->ops.dsi->enable_hs(in, ddata->channel, true); - - r = _dsicm_enable_te(ddata, true); - if (r) { - dev_err(&ddata->pdev->dev, "failed to re-enable TE"); - goto err2; - } - - if (gpio_is_valid(ddata->ext_te_gpio)) - enable_irq(gpio_to_irq(ddata->ext_te_gpio)); - - dsicm_queue_ulps_work(ddata); - - ddata->ulps_enabled = false; - - return 0; - -err2: - dev_err(&ddata->pdev->dev, "failed to exit ULPS"); - - r = dsicm_panel_reset(ddata); - if (!r) { - if (gpio_is_valid(ddata->ext_te_gpio)) - enable_irq(gpio_to_irq(ddata->ext_te_gpio)); - ddata->ulps_enabled = false; - } -err1: - dsicm_queue_ulps_work(ddata); - - return r; -} - -static int dsicm_wake_up(struct panel_drv_data *ddata) -{ - if (ddata->ulps_enabled) - return dsicm_exit_ulps(ddata); - - dsicm_cancel_ulps_work(ddata); - dsicm_queue_ulps_work(ddata); - return 0; -} - -static int dsicm_bl_update_status(struct backlight_device *dev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); - struct omap_dss_device *in = ddata->in; - 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(&ddata->pdev->dev, "update brightness to %d\n", level); - - mutex_lock(&ddata->lock); - - if (ddata->enabled) { - in->ops.dsi->bus_lock(in); - - r = dsicm_wake_up(ddata); - if (!r) - r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, level); - - in->ops.dsi->bus_unlock(in); - } else { - r = 0; - } - - mutex_unlock(&ddata->lock); - - return r; -} - -static int dsicm_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 dsicm_bl_ops = { - .get_brightness = dsicm_bl_get_intensity, - .update_status = dsicm_bl_update_status, -}; - -static void dsicm_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 dsicm_num_errors_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct platform_device *pdev = to_platform_device(dev); - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *in = ddata->in; - u8 errors = 0; - int r; - - mutex_lock(&ddata->lock); - - if (ddata->enabled) { - in->ops.dsi->bus_lock(in); - - r = dsicm_wake_up(ddata); - if (!r) - r = dsicm_dcs_read_1(ddata, DCS_READ_NUM_ERRORS, - &errors); - - in->ops.dsi->bus_unlock(in); - } else { - r = -ENODEV; - } - - mutex_unlock(&ddata->lock); - - if (r) - return r; - - return snprintf(buf, PAGE_SIZE, "%d\n", errors); -} - -static ssize_t dsicm_hw_revision_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct platform_device *pdev = to_platform_device(dev); - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *in = ddata->in; - u8 id1, id2, id3; - int r; - - mutex_lock(&ddata->lock); - - if (ddata->enabled) { - in->ops.dsi->bus_lock(in); - - r = dsicm_wake_up(ddata); - if (!r) - r = dsicm_get_id(ddata, &id1, &id2, &id3); - - in->ops.dsi->bus_unlock(in); - } else { - r = -ENODEV; - } - - mutex_unlock(&ddata->lock); - - if (r) - return r; - - return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3); -} - -static ssize_t dsicm_store_ulps(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct platform_device *pdev = to_platform_device(dev); - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *in = ddata->in; - unsigned long t; - int r; - - r = kstrtoul(buf, 0, &t); - if (r) - return r; - - mutex_lock(&ddata->lock); - - if (ddata->enabled) { - in->ops.dsi->bus_lock(in); - - if (t) - r = dsicm_enter_ulps(ddata); - else - r = dsicm_wake_up(ddata); - - in->ops.dsi->bus_unlock(in); - } - - mutex_unlock(&ddata->lock); - - if (r) - return r; - - return count; -} - -static ssize_t dsicm_show_ulps(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct platform_device *pdev = to_platform_device(dev); - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - unsigned t; - - mutex_lock(&ddata->lock); - t = ddata->ulps_enabled; - mutex_unlock(&ddata->lock); - - return snprintf(buf, PAGE_SIZE, "%u\n", t); -} - -static ssize_t dsicm_store_ulps_timeout(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct platform_device *pdev = to_platform_device(dev); - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *in = ddata->in; - unsigned long t; - int r; - - r = kstrtoul(buf, 0, &t); - if (r) - return r; - - mutex_lock(&ddata->lock); - ddata->ulps_timeout = t; - - if (ddata->enabled) { - /* dsicm_wake_up will restart the timer */ - in->ops.dsi->bus_lock(in); - r = dsicm_wake_up(ddata); - in->ops.dsi->bus_unlock(in); - } - - mutex_unlock(&ddata->lock); - - if (r) - return r; - - return count; -} - -static ssize_t dsicm_show_ulps_timeout(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct platform_device *pdev = to_platform_device(dev); - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - unsigned t; - - mutex_lock(&ddata->lock); - t = ddata->ulps_timeout; - mutex_unlock(&ddata->lock); - - return snprintf(buf, PAGE_SIZE, "%u\n", t); -} - -static DEVICE_ATTR(num_dsi_errors, S_IRUGO, dsicm_num_errors_show, NULL); -static DEVICE_ATTR(hw_revision, S_IRUGO, dsicm_hw_revision_show, NULL); -static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR, - dsicm_show_ulps, dsicm_store_ulps); -static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR, - dsicm_show_ulps_timeout, dsicm_store_ulps_timeout); - -static struct attribute *dsicm_attrs[] = { - &dev_attr_num_dsi_errors.attr, - &dev_attr_hw_revision.attr, - &dev_attr_ulps.attr, - &dev_attr_ulps_timeout.attr, - NULL, -}; - -static struct attribute_group dsicm_attr_group = { - .attrs = dsicm_attrs, -}; - -static void dsicm_hw_reset(struct panel_drv_data *ddata) -{ - if (!gpio_is_valid(ddata->reset_gpio)) - return; - - gpio_set_value(ddata->reset_gpio, 1); - udelay(10); - /* reset the panel */ - gpio_set_value(ddata->reset_gpio, 0); - /* assert reset */ - udelay(10); - gpio_set_value(ddata->reset_gpio, 1); - /* wait after releasing reset */ - usleep_range(5000, 10000); -} - -static int dsicm_power_on(struct panel_drv_data *ddata) -{ - struct omap_dss_device *in = ddata->in; - 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 = &ddata->timings, - .hs_clk_min = 150000000, - .hs_clk_max = 300000000, - .lp_clk_min = 7000000, - .lp_clk_max = 10000000, - }; - - if (ddata->pin_config.num_pins > 0) { - r = in->ops.dsi->configure_pins(in, &ddata->pin_config); - if (r) { - dev_err(&ddata->pdev->dev, - "failed to configure DSI pins\n"); - goto err0; - } - } - - r = in->ops.dsi->set_config(in, &dsi_config); - if (r) { - dev_err(&ddata->pdev->dev, "failed to configure DSI\n"); - goto err0; - } - - r = in->ops.dsi->enable(in); - if (r) { - dev_err(&ddata->pdev->dev, "failed to enable DSI\n"); - goto err0; - } - - dsicm_hw_reset(ddata); - - in->ops.dsi->enable_hs(in, ddata->channel, false); - - r = dsicm_sleep_out(ddata); - if (r) - goto err; - - r = dsicm_get_id(ddata, &id1, &id2, &id3); - if (r) - goto err; - - r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, 0xff); - if (r) - goto err; - - r = dsicm_dcs_write_1(ddata, DCS_CTRL_DISPLAY, - (1<<2) | (1<<5)); /* BL | BCTRL */ - if (r) - goto err; - - r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_PIXEL_FORMAT, - MIPI_DCS_PIXEL_FMT_24BIT); - if (r) - goto err; - - r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_ON); - if (r) - goto err; - - r = _dsicm_enable_te(ddata, ddata->te_enabled); - if (r) - goto err; - - r = in->ops.dsi->enable_video_output(in, ddata->channel); - if (r) - goto err; - - ddata->enabled = 1; - - if (!ddata->intro_printed) { - dev_info(&ddata->pdev->dev, "panel revision %02x.%02x.%02x\n", - id1, id2, id3); - ddata->intro_printed = true; - } - - in->ops.dsi->enable_hs(in, ddata->channel, true); - - return 0; -err: - dev_err(&ddata->pdev->dev, "error while enabling panel, issuing HW reset\n"); - - dsicm_hw_reset(ddata); - - in->ops.dsi->disable(in, true, false); -err0: - return r; -} - -static void dsicm_power_off(struct panel_drv_data *ddata) -{ - struct omap_dss_device *in = ddata->in; - int r; - - in->ops.dsi->disable_video_output(in, ddata->channel); - - r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_OFF); - if (!r) - r = dsicm_sleep_in(ddata); - - if (r) { - dev_err(&ddata->pdev->dev, - "error disabling panel, issuing HW reset\n"); - dsicm_hw_reset(ddata); - } - - in->ops.dsi->disable(in, true, false); - - ddata->enabled = 0; -} - -static int dsicm_panel_reset(struct panel_drv_data *ddata) -{ - dev_err(&ddata->pdev->dev, "performing LCD reset\n"); - - dsicm_power_off(ddata); - dsicm_hw_reset(ddata); - return dsicm_power_on(ddata); -} - -static int dsicm_connect(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *in = ddata->in; - struct device *dev = &ddata->pdev->dev; - int r; - - if (omapdss_device_is_connected(dssdev)) - return 0; - - r = in->ops.dsi->connect(in, dssdev); - if (r) { - dev_err(dev, "Failed to connect to video source\n"); - return r; - } - - r = in->ops.dsi->request_vc(ddata->in, &ddata->channel); - if (r) { - dev_err(dev, "failed to get virtual channel\n"); - goto err_req_vc; - } - - r = in->ops.dsi->set_vc_id(ddata->in, ddata->channel, TCH); - if (r) { - dev_err(dev, "failed to set VC_ID\n"); - goto err_vc_id; - } - - return 0; - -err_vc_id: - in->ops.dsi->release_vc(ddata->in, ddata->channel); -err_req_vc: - in->ops.dsi->disconnect(in, dssdev); - return r; -} - -static void dsicm_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.dsi->release_vc(in, ddata->channel); - in->ops.dsi->disconnect(in, dssdev); -} - -static int dsicm_enable(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->pdev->dev, "enable\n"); - - mutex_lock(&ddata->lock); - - if (!omapdss_device_is_connected(dssdev)) { - r = -ENODEV; - goto err; - } - - if (omapdss_device_is_enabled(dssdev)) { - r = 0; - goto err; - } - - in->ops.dsi->bus_lock(in); - - r = dsicm_power_on(ddata); - - in->ops.dsi->bus_unlock(in); - - if (r) - goto err; - - dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; - - mutex_unlock(&ddata->lock); - - return 0; -err: - dev_dbg(&ddata->pdev->dev, "enable failed\n"); - mutex_unlock(&ddata->lock); - return r; -} - -static void dsicm_disable(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->pdev->dev, "disable\n"); - - mutex_lock(&ddata->lock); - - dsicm_cancel_ulps_work(ddata); - - in->ops.dsi->bus_lock(in); - - if (omapdss_device_is_enabled(dssdev)) { - r = dsicm_wake_up(ddata); - if (!r) - dsicm_power_off(ddata); - } - - in->ops.dsi->bus_unlock(in); - - dssdev->state = OMAP_DSS_DISPLAY_DISABLED; - - mutex_unlock(&ddata->lock); -} - -static void dsicm_framedone_cb(int err, void *data) -{ - struct panel_drv_data *ddata = data; - struct omap_dss_device *in = ddata->in; - - dev_dbg(&ddata->pdev->dev, "framedone, err %d\n", err); - in->ops.dsi->bus_unlock(ddata->in); -} - -static irqreturn_t dsicm_te_isr(int irq, void *data) -{ - struct panel_drv_data *ddata = data; - struct omap_dss_device *in = ddata->in; - int old; - int r; - - old = atomic_cmpxchg(&ddata->do_update, 1, 0); - - if (old) { - cancel_delayed_work(&ddata->te_timeout_work); - - r = in->ops.dsi->update(in, ddata->channel, dsicm_framedone_cb, - ddata); - if (r) - goto err; - } - - return IRQ_HANDLED; -err: - dev_err(&ddata->pdev->dev, "start update failed\n"); - in->ops.dsi->bus_unlock(in); - return IRQ_HANDLED; -} - -static void dsicm_te_timeout_work_callback(struct work_struct *work) -{ - struct panel_drv_data *ddata = container_of(work, struct panel_drv_data, - te_timeout_work.work); - struct omap_dss_device *in = ddata->in; - - dev_err(&ddata->pdev->dev, "TE not received for 250ms!\n"); - - atomic_set(&ddata->do_update, 0); - in->ops.dsi->bus_unlock(in); -} - -static int dsicm_update(struct omap_dss_device *dssdev, - u16 x, u16 y, u16 w, u16 h) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *in = ddata->in; - int r; - - dev_dbg(&ddata->pdev->dev, "update %d, %d, %d x %d\n", x, y, w, h); - - mutex_lock(&ddata->lock); - in->ops.dsi->bus_lock(in); - - r = dsicm_wake_up(ddata); - if (r) - goto err; - - if (!ddata->enabled) { - r = 0; - goto err; - } - - /* XXX no need to send this every frame, but dsi break if not done */ - r = dsicm_set_update_window(ddata, 0, 0, - dssdev->panel.timings.x_res, - dssdev->panel.timings.y_res); - if (r) - goto err; - - if (ddata->te_enabled && gpio_is_valid(ddata->ext_te_gpio)) { - schedule_delayed_work(&ddata->te_timeout_work, - msecs_to_jiffies(250)); - atomic_set(&ddata->do_update, 1); - } else { - r = in->ops.dsi->update(in, ddata->channel, dsicm_framedone_cb, - ddata); - if (r) - goto err; - } - - /* note: no bus_unlock here. unlock is in framedone_cb */ - mutex_unlock(&ddata->lock); - return 0; -err: - in->ops.dsi->bus_unlock(in); - mutex_unlock(&ddata->lock); - return r; -} - -static int dsicm_sync(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *in = ddata->in; - - dev_dbg(&ddata->pdev->dev, "sync\n"); - - mutex_lock(&ddata->lock); - in->ops.dsi->bus_lock(in); - in->ops.dsi->bus_unlock(in); - mutex_unlock(&ddata->lock); - - dev_dbg(&ddata->pdev->dev, "sync done\n"); - - return 0; -} - -static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable) -{ - struct omap_dss_device *in = ddata->in; - int r; - - if (enable) - r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_TEAR_ON, 0); - else - r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_TEAR_OFF); - - if (!gpio_is_valid(ddata->ext_te_gpio)) - in->ops.dsi->enable_te(in, enable); - - /* possible panel bug */ - msleep(100); - - return r; -} - -static int dsicm_enable_te(struct omap_dss_device *dssdev, bool enable) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *in = ddata->in; - int r; - - mutex_lock(&ddata->lock); - - if (ddata->te_enabled == enable) - goto end; - - in->ops.dsi->bus_lock(in); - - if (ddata->enabled) { - r = dsicm_wake_up(ddata); - if (r) - goto err; - - r = _dsicm_enable_te(ddata, enable); - if (r) - goto err; - } - - ddata->te_enabled = enable; - - in->ops.dsi->bus_unlock(in); -end: - mutex_unlock(&ddata->lock); - - return 0; -err: - in->ops.dsi->bus_unlock(in); - mutex_unlock(&ddata->lock); - - return r; -} - -static int dsicm_get_te(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - int r; - - mutex_lock(&ddata->lock); - r = ddata->te_enabled; - mutex_unlock(&ddata->lock); - - return r; -} - -static int dsicm_memory_read(struct omap_dss_device *dssdev, - void *buf, size_t size, - u16 x, u16 y, u16 w, u16 h) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *in = ddata->in; - int r; - int first = 1; - int plen; - unsigned buf_used = 0; - - if (size < w * h * 3) - return -ENOMEM; - - mutex_lock(&ddata->lock); - - if (!ddata->enabled) { - r = -ENODEV; - goto err1; - } - - size = min(w * h * 3, - dssdev->panel.timings.x_res * - dssdev->panel.timings.y_res * 3); - - in->ops.dsi->bus_lock(in); - - r = dsicm_wake_up(ddata); - 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; - - dsicm_set_update_window(ddata, x, y, w, h); - - r = in->ops.dsi->set_max_rx_packet_size(in, ddata->channel, plen); - if (r) - goto err2; - - while (buf_used < size) { - u8 dcs_cmd = first ? 0x2e : 0x3e; - first = 0; - - r = in->ops.dsi->dcs_read(in, ddata->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(&ddata->pdev->dev, "short read\n"); - break; - } - - if (signal_pending(current)) { - dev_err(&ddata->pdev->dev, "signal pending, " - "aborting memory read\n"); - r = -ERESTARTSYS; - goto err3; - } - } - - r = buf_used; - -err3: - in->ops.dsi->set_max_rx_packet_size(in, ddata->channel, 1); -err2: - in->ops.dsi->bus_unlock(in); -err1: - mutex_unlock(&ddata->lock); - return r; -} - -static void dsicm_ulps_work(struct work_struct *work) -{ - struct panel_drv_data *ddata = container_of(work, struct panel_drv_data, - ulps_work.work); - struct omap_dss_device *dssdev = &ddata->dssdev; - struct omap_dss_device *in = ddata->in; - - mutex_lock(&ddata->lock); - - if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !ddata->enabled) { - mutex_unlock(&ddata->lock); - return; - } - - in->ops.dsi->bus_lock(in); - - dsicm_enter_ulps(ddata); - - in->ops.dsi->bus_unlock(in); - mutex_unlock(&ddata->lock); -} - -static struct omap_dss_driver dsicm_ops = { - .connect = dsicm_connect, - .disconnect = dsicm_disconnect, - - .enable = dsicm_enable, - .disable = dsicm_disable, - - .update = dsicm_update, - .sync = dsicm_sync, - - .get_resolution = dsicm_get_resolution, - .get_recommended_bpp = omapdss_default_get_recommended_bpp, - - .enable_te = dsicm_enable_te, - .get_te = dsicm_get_te, - - .memory_read = dsicm_memory_read, -}; - -static int dsicm_probe_pdata(struct platform_device *pdev) -{ - const struct panel_dsicm_platform_data *pdata; - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *dssdev, *in; - - pdata = dev_get_platdata(&pdev->dev); - - in = omap_dss_find_output(pdata->source); - if (in == NULL) { - dev_err(&pdev->dev, "failed to find video source\n"); - return -EPROBE_DEFER; - } - ddata->in = in; - - ddata->reset_gpio = pdata->reset_gpio; - - if (pdata->use_ext_te) - ddata->ext_te_gpio = pdata->ext_te_gpio; - else - ddata->ext_te_gpio = -1; - - ddata->ulps_timeout = pdata->ulps_timeout; - - ddata->use_dsi_backlight = pdata->use_dsi_backlight; - - ddata->pin_config = pdata->pin_config; - - dssdev = &ddata->dssdev; - dssdev->name = pdata->name; - - return 0; -} - -static int dsicm_probe_of(struct platform_device *pdev) -{ - struct device_node *node = pdev->dev.of_node; - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *in; - int gpio; - - gpio = of_get_named_gpio(node, "reset-gpios", 0); - if (!gpio_is_valid(gpio)) { - dev_err(&pdev->dev, "failed to parse reset gpio\n"); - return gpio; - } - ddata->reset_gpio = gpio; - - gpio = of_get_named_gpio(node, "te-gpios", 0); - if (gpio_is_valid(gpio) || gpio == -ENOENT) { - ddata->ext_te_gpio = gpio; - } else { - dev_err(&pdev->dev, "failed to parse TE gpio\n"); - return gpio; - } - - in = omapdss_of_find_source_for_first_ep(node); - if (IS_ERR(in)) { - dev_err(&pdev->dev, "failed to find video source\n"); - return PTR_ERR(in); - } - - ddata->in = in; - - /* TODO: ulps, backlight */ - - return 0; -} - -static int dsicm_probe(struct platform_device *pdev) -{ - struct backlight_properties props; - struct panel_drv_data *ddata; - struct backlight_device *bldev = NULL; - struct device *dev = &pdev->dev; - struct omap_dss_device *dssdev; - int r; - - dev_dbg(dev, "probe\n"); - - ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); - if (!ddata) - return -ENOMEM; - - platform_set_drvdata(pdev, ddata); - ddata->pdev = pdev; - - if (dev_get_platdata(dev)) { - r = dsicm_probe_pdata(pdev); - if (r) - return r; - } else if (pdev->dev.of_node) { - r = dsicm_probe_of(pdev); - if (r) - return r; - } else { - return -ENODEV; - } - - ddata->timings.x_res = 864; - ddata->timings.y_res = 480; - ddata->timings.pixelclock = 864 * 480 * 60; - - dssdev = &ddata->dssdev; - dssdev->dev = dev; - dssdev->driver = &dsicm_ops; - dssdev->panel.timings = ddata->timings; - dssdev->type = OMAP_DISPLAY_TYPE_DSI; - dssdev->owner = THIS_MODULE; - - dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888; - dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE | - OMAP_DSS_DISPLAY_CAP_TEAR_ELIM; - - r = omapdss_register_display(dssdev); - if (r) { - dev_err(dev, "Failed to register panel\n"); - goto err_reg; - } - - mutex_init(&ddata->lock); - - atomic_set(&ddata->do_update, 0); - - if (gpio_is_valid(ddata->reset_gpio)) { - r = devm_gpio_request_one(dev, ddata->reset_gpio, - GPIOF_OUT_INIT_LOW, "taal rst"); - if (r) { - dev_err(dev, "failed to request reset gpio\n"); - return r; - } - } - - if (gpio_is_valid(ddata->ext_te_gpio)) { - r = devm_gpio_request_one(dev, ddata->ext_te_gpio, - GPIOF_IN, "taal irq"); - if (r) { - dev_err(dev, "GPIO request failed\n"); - return r; - } - - r = devm_request_irq(dev, gpio_to_irq(ddata->ext_te_gpio), - dsicm_te_isr, - IRQF_TRIGGER_RISING, - "taal vsync", ddata); - - if (r) { - dev_err(dev, "IRQ request failed\n"); - return r; - } - - INIT_DEFERRABLE_WORK(&ddata->te_timeout_work, - dsicm_te_timeout_work_callback); - - dev_dbg(dev, "Using GPIO TE\n"); - } - - ddata->workqueue = create_singlethread_workqueue("dsicm_wq"); - if (ddata->workqueue == NULL) { - dev_err(dev, "can't create workqueue\n"); - return -ENOMEM; - } - INIT_DELAYED_WORK(&ddata->ulps_work, dsicm_ulps_work); - - dsicm_hw_reset(ddata); - - if (ddata->use_dsi_backlight) { - memset(&props, 0, sizeof(struct backlight_properties)); - props.max_brightness = 255; - - props.type = BACKLIGHT_RAW; - bldev = backlight_device_register(dev_name(dev), - dev, ddata, &dsicm_bl_ops, &props); - if (IS_ERR(bldev)) { - r = PTR_ERR(bldev); - goto err_bl; - } - - ddata->bldev = bldev; - - bldev->props.fb_blank = FB_BLANK_UNBLANK; - bldev->props.power = FB_BLANK_UNBLANK; - bldev->props.brightness = 255; - - dsicm_bl_update_status(bldev); - } - - r = sysfs_create_group(&dev->kobj, &dsicm_attr_group); - if (r) { - dev_err(dev, "failed to create sysfs files\n"); - goto err_sysfs_create; - } - - return 0; - -err_sysfs_create: - if (bldev != NULL) - backlight_device_unregister(bldev); -err_bl: - destroy_workqueue(ddata->workqueue); -err_reg: - return r; -} - -static int __exit dsicm_remove(struct platform_device *pdev) -{ - struct panel_drv_data *ddata = platform_get_drvdata(pdev); - struct omap_dss_device *dssdev = &ddata->dssdev; - struct backlight_device *bldev; - - dev_dbg(&pdev->dev, "remove\n"); - - omapdss_unregister_display(dssdev); - - dsicm_disable(dssdev); - dsicm_disconnect(dssdev); - - sysfs_remove_group(&pdev->dev.kobj, &dsicm_attr_group); - - bldev = ddata->bldev; - if (bldev != NULL) { - bldev->props.power = FB_BLANK_POWERDOWN; - dsicm_bl_update_status(bldev); - backlight_device_unregister(bldev); - } - - omap_dss_put_device(ddata->in); - - dsicm_cancel_ulps_work(ddata); - destroy_workqueue(ddata->workqueue); - - /* reset, to be sure that the panel is in a valid state */ - dsicm_hw_reset(ddata); - - return 0; -} - -static const struct of_device_id dsicm_of_match[] = { - { .compatible = "omapdss,panel-dsi-cm", }, - {}, -}; - -MODULE_DEVICE_TABLE(of, dsicm_of_match); - -static struct platform_driver dsicm_driver = { - .probe = dsicm_probe, - .remove = __exit_p(dsicm_remove), - .driver = { - .name = "panel-dsi-cm", - .of_match_table = dsicm_of_match, - .suppress_bind_attrs = true, - }, -}; - -module_platform_driver(dsicm_driver); - -MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); -MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver"); -MODULE_LICENSE("GPL"); |