OSCL-LXR linux-6.0.1/​drivers/​gpu/​drm/​panel/​panel-edp.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /*
  * Copyright (C) 2013, NVIDIA Corporation.  All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  */
 
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/display_timing.h>
 #include <video/of_display_timing.h>
 #include <video/videomode.h>
 
 #include <drm/display/drm_dp_aux_bus.h>
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_device.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_panel.h>
 
 /**
  * struct panel_delay - Describes delays for a simple panel.
  */
 struct panel_delay {
     /**
      * @hpd_reliable: Time for HPD to be reliable
      *
      * The time (in milliseconds) that it takes after powering the panel
      * before the HPD signal is reliable. Ideally this is 0 but some panels,
      * board designs, or bad pulldown configs can cause a glitch here.
      *
      * NOTE: on some old panel data this number appers to be much too big.
      * Presumably some old panels simply didn't have HPD hooked up and put
      * the hpd_absent here because this field predates the
      * hpd_absent. While that works, it's non-ideal.
      */
     unsigned int hpd_reliable;
 
     /**
      * @hpd_absent: Time to wait if HPD isn't hooked up.
      *
      * Add this to the prepare delay if we know Hot Plug Detect isn't used.
      *
      * This is T3-max on eDP timing diagrams or the delay from power on
      * until HPD is guaranteed to be asserted.
      */
     unsigned int hpd_absent;
 
     /**
      * @prepare_to_enable: Time between prepare and enable.
      *
      * The minimum time, in milliseconds, that needs to have passed
      * between when prepare finished and enable may begin. If at
      * enable time less time has passed since prepare finished,
      * the driver waits for the remaining time.
      *
      * If a fixed enable delay is also specified, we'll start
      * counting before delaying for the fixed delay.
      *
      * If a fixed prepare delay is also specified, we won't start
      * counting until after the fixed delay. We can't overlap this
      * fixed delay with the min time because the fixed delay
      * doesn't happen at the end of the function if a HPD GPIO was
      * specified.
      *
      * In other words:
      *   prepare()
      *     ...
      *     // do fixed prepare delay
      *     // wait for HPD GPIO if applicable
      *     // start counting for prepare_to_enable
      *
      *   enable()
      *     // do fixed enable delay
      *     // enforce prepare_to_enable min time
      *
      * This is not specified in a standard way on eDP timing diagrams.
      * It is effectively the time from HPD going high till you can
      * turn on the backlight.
      */
     unsigned int prepare_to_enable;
 
     /**
      * @enable: Time for the panel to display a valid frame.
      *
      * The time (in milliseconds) that it takes for the panel to
      * display the first valid frame after starting to receive
      * video data.
      *
      * This is (T6-min + max(T7-max, T8-min)) on eDP timing diagrams or
      * the delay after link training finishes until we can turn the
      * backlight on and see valid data.
      */
     unsigned int enable;
 
     /**
      * @disable: Time for the panel to turn the display off.
      *
      * The time (in milliseconds) that it takes for the panel to
      * turn the display off (no content is visible).
      *
      * This is T9-min (delay from backlight off to end of valid video
      * data) on eDP timing diagrams. It is not common to set.
      */
     unsigned int disable;
 
     /**
      * @unprepare: Time to power down completely.
      *
      * The time (in milliseconds) that it takes for the panel
      * to power itself down completely.
      *
      * This time is used to prevent a future "prepare" from
      * starting until at least this many milliseconds has passed.
      * If at prepare time less time has passed since unprepare
      * finished, the driver waits for the remaining time.
      *
      * This is T12-min on eDP timing diagrams.
      */
     unsigned int unprepare;
 };
 
 /**
  * struct panel_desc - Describes a simple panel.
  */
 struct panel_desc {
     /**
      * @modes: Pointer to array of fixed modes appropriate for this panel.
      *
      * If only one mode then this can just be the address of the mode.
      * NOTE: cannot be used with "timings" and also if this is specified
      * then you cannot override the mode in the device tree.
      */
     const struct drm_display_mode *modes;
 
     /** @num_modes: Number of elements in modes array. */
     unsigned int num_modes;
 
     /**
      * @timings: Pointer to array of display timings
      *
      * NOTE: cannot be used with "modes" and also these will be used to
      * validate a device tree override if one is present.
      */
     const struct display_timing *timings;
 
     /** @num_timings: Number of elements in timings array. */
     unsigned int num_timings;
 
     /** @bpc: Bits per color. */
     unsigned int bpc;
 
     /** @size: Structure containing the physical size of this panel. */
     struct {
         /**
          * @size.width: Width (in mm) of the active display area.
          */
         unsigned int width;
 
         /**
          * @size.height: Height (in mm) of the active display area.
          */
         unsigned int height;
     } size;
 
     /** @delay: Structure containing various delay values for this panel. */
     struct panel_delay delay;
 };
 
 /**
  * struct edp_panel_entry - Maps panel ID to delay / panel name.
  */
 struct edp_panel_entry {
     /** @panel_id: 32-bit ID for panel, encoded with drm_edid_encode_panel_id(). */
     u32 panel_id;
 
     /** @delay: The power sequencing delays needed for this panel. */
     const struct panel_delay *delay;
 
     /** @name: Name of this panel (for printing to logs). */
     const char *name;
 };
 
 struct panel_edp {
     struct drm_panel base;
     bool enabled;
     bool no_hpd;
 
     bool prepared;
 
     ktime_t prepared_time;
     ktime_t unprepared_time;
 
     const struct panel_desc *desc;
 
     struct regulator *supply;
     struct i2c_adapter *ddc;
     struct drm_dp_aux *aux;
 
     struct gpio_desc *enable_gpio;
     struct gpio_desc *hpd_gpio;
 
     const struct edp_panel_entry *detected_panel;
 
     struct edid *edid;
 
     struct drm_display_mode override_mode;
 
     enum drm_panel_orientation orientation;
 };
 
 static inline struct panel_edp *to_panel_edp(struct drm_panel *panel)
 {
     return container_of(panel, struct panel_edp, base);
 }
 
 static unsigned int panel_edp_get_timings_modes(struct panel_edp *panel,
                         struct drm_connector *connector)
 {
     struct drm_display_mode *mode;
     unsigned int i, num = 0;
 
     for (i = 0; i < panel->desc->num_timings; i++) {
         const struct display_timing *dt = &panel->desc->timings[i];
         struct videomode vm;
 
         videomode_from_timing(dt, &vm);
         mode = drm_mode_create(connector->dev);
         if (!mode) {
             dev_err(panel->base.dev, "failed to add mode %ux%u\n",
                 dt->hactive.typ, dt->vactive.typ);
             continue;
         }
 
         drm_display_mode_from_videomode(&vm, mode);
 
         mode->type |= DRM_MODE_TYPE_DRIVER;
 
         if (panel->desc->num_timings == 1)
             mode->type |= DRM_MODE_TYPE_PREFERRED;
 
         drm_mode_probed_add(connector, mode);
         num++;
     }
 
     return num;
 }
 
 static unsigned int panel_edp_get_display_modes(struct panel_edp *panel,
                         struct drm_connector *connector)
 {
     struct drm_display_mode *mode;
     unsigned int i, num = 0;
 
     for (i = 0; i < panel->desc->num_modes; i++) {
         const struct drm_display_mode *m = &panel->desc->modes[i];
 
         mode = drm_mode_duplicate(connector->dev, m);
         if (!mode) {
             dev_err(panel->base.dev, "failed to add mode %ux%u@%u\n",
                 m->hdisplay, m->vdisplay,
                 drm_mode_vrefresh(m));
             continue;
         }
 
         mode->type |= DRM_MODE_TYPE_DRIVER;
 
         if (panel->desc->num_modes == 1)
             mode->type |= DRM_MODE_TYPE_PREFERRED;
 
         drm_mode_set_name(mode);
 
         drm_mode_probed_add(connector, mode);
         num++;
     }
 
     return num;
 }
 
 static int panel_edp_get_non_edid_modes(struct panel_edp *panel,
                     struct drm_connector *connector)
 {
     struct drm_display_mode *mode;
     bool has_override = panel->override_mode.type;
     unsigned int num = 0;
 
     if (!panel->desc)
         return 0;
 
     if (has_override) {
         mode = drm_mode_duplicate(connector->dev,
                       &panel->override_mode);
         if (mode) {
             drm_mode_probed_add(connector, mode);
             num = 1;
         } else {
             dev_err(panel->base.dev, "failed to add override mode\n");
         }
     }
 
     /* Only add timings if override was not there or failed to validate */
     if (num == 0 && panel->desc->num_timings)
         num = panel_edp_get_timings_modes(panel, connector);
 
     /*
      * Only add fixed modes if timings/override added no mode.
      *
      * We should only ever have either the display timings specified
      * or a fixed mode. Anything else is rather bogus.
      */
     WARN_ON(panel->desc->num_timings && panel->desc->num_modes);
     if (num == 0)
         num = panel_edp_get_display_modes(panel, connector);
 
     connector->display_info.bpc = panel->desc->bpc;
     connector->display_info.width_mm = panel->desc->size.width;
     connector->display_info.height_mm = panel->desc->size.height;
 
     return num;
 }
 
 static void panel_edp_wait(ktime_t start_ktime, unsigned int min_ms)
 {
     ktime_t now_ktime, min_ktime;
 
     if (!min_ms)
         return;
 
     min_ktime = ktime_add(start_ktime, ms_to_ktime(min_ms));
     now_ktime = ktime_get();
 
     if (ktime_before(now_ktime, min_ktime))
         msleep(ktime_to_ms(ktime_sub(min_ktime, now_ktime)) + 1);
 }
 
 static int panel_edp_disable(struct drm_panel *panel)
 {
     struct panel_edp *p = to_panel_edp(panel);
 
     if (!p->enabled)
         return 0;
 
     if (p->desc->delay.disable)
         msleep(p->desc->delay.disable);
 
     p->enabled = false;
 
     return 0;
 }
 
 static int panel_edp_suspend(struct device *dev)
 {
     struct panel_edp *p = dev_get_drvdata(dev);
 
     gpiod_set_value_cansleep(p->enable_gpio, 0);
     regulator_disable(p->supply);
     p->unprepared_time = ktime_get();
 
     return 0;
 }
 
 static int panel_edp_unprepare(struct drm_panel *panel)
 {
     struct panel_edp *p = to_panel_edp(panel);
     int ret;
 
     /* Unpreparing when already unprepared is a no-op */
     if (!p->prepared)
         return 0;
 
     pm_runtime_mark_last_busy(panel->dev);
     ret = pm_runtime_put_autosuspend(panel->dev);
     if (ret < 0)
         return ret;
     p->prepared = false;
 
     return 0;
 }
 
 static int panel_edp_get_hpd_gpio(struct device *dev, struct panel_edp *p)
 {
     int err;
 
     p->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
     if (IS_ERR(p->hpd_gpio)) {
         err = PTR_ERR(p->hpd_gpio);
 
         if (err != -EPROBE_DEFER)
             dev_err(dev, "failed to get 'hpd' GPIO: %d\n", err);
 
         return err;
     }
 
     return 0;
 }
 
 static bool panel_edp_can_read_hpd(struct panel_edp *p)
 {
     return !p->no_hpd && (p->hpd_gpio || (p->aux && p->aux->wait_hpd_asserted));
 }
 
 static int panel_edp_prepare_once(struct panel_edp *p)
 {
     struct device *dev = p->base.dev;
     unsigned int delay;
     int err;
     int hpd_asserted;
     unsigned long hpd_wait_us;
 
     panel_edp_wait(p->unprepared_time, p->desc->delay.unprepare);
 
     err = regulator_enable(p->supply);
     if (err < 0) {
         dev_err(dev, "failed to enable supply: %d\n", err);
         return err;
     }
 
     gpiod_set_value_cansleep(p->enable_gpio, 1);
 
     delay = p->desc->delay.hpd_reliable;
     if (p->no_hpd)
         delay = max(delay, p->desc->delay.hpd_absent);
     if (delay)
         msleep(delay);
 
     if (panel_edp_can_read_hpd(p)) {
         if (p->desc->delay.hpd_absent)
             hpd_wait_us = p->desc->delay.hpd_absent * 1000UL;
         else
             hpd_wait_us = 2000000;
 
         if (p->hpd_gpio) {
             err = readx_poll_timeout(gpiod_get_value_cansleep,
                          p->hpd_gpio, hpd_asserted,
                          hpd_asserted, 1000, hpd_wait_us);
             if (hpd_asserted < 0)
                 err = hpd_asserted;
         } else {
             err = p->aux->wait_hpd_asserted(p->aux, hpd_wait_us);
         }
 
         if (err) {
             if (err != -ETIMEDOUT)
                 dev_err(dev,
                     "error waiting for hpd GPIO: %d\n", err);
             goto error;
         }
     }
 
     p->prepared_time = ktime_get();
 
     return 0;
 
 error:
     gpiod_set_value_cansleep(p->enable_gpio, 0);
     regulator_disable(p->supply);
     p->unprepared_time = ktime_get();
 
     return err;
 }
 
 /*
  * Some panels simply don't always come up and need to be power cycled to
  * work properly.  We'll allow for a handful of retries.
  */
 #define MAX_PANEL_PREPARE_TRIES     5
 
 static int panel_edp_resume(struct device *dev)
 {
     struct panel_edp *p = dev_get_drvdata(dev);
     int ret;
     int try;
 
     for (try = 0; try < MAX_PANEL_PREPARE_TRIES; try++) {
         ret = panel_edp_prepare_once(p);
         if (ret != -ETIMEDOUT)
             break;
     }
 
     if (ret == -ETIMEDOUT)
         dev_err(dev, "Prepare timeout after %d tries\n", try);
     else if (try)
         dev_warn(dev, "Prepare needed %d retries\n", try);
 
     return ret;
 }
 
 static int panel_edp_prepare(struct drm_panel *panel)
 {
     struct panel_edp *p = to_panel_edp(panel);
     int ret;
 
     /* Preparing when already prepared is a no-op */
     if (p->prepared)
         return 0;
 
     ret = pm_runtime_get_sync(panel->dev);
     if (ret < 0) {
         pm_runtime_put_autosuspend(panel->dev);
         return ret;
     }
 
     p->prepared = true;
 
     return 0;
 }
 
 static int panel_edp_enable(struct drm_panel *panel)
 {
     struct panel_edp *p = to_panel_edp(panel);
     unsigned int delay;
 
     if (p->enabled)
         return 0;
 
     delay = p->desc->delay.enable;
 
     /*
      * If there is a "prepare_to_enable" delay then that's supposed to be
      * the delay from HPD going high until we can turn the backlight on.
      * However, we can only count this if HPD is readable by the panel
      * driver.
      *
      * If we aren't handling the HPD pin ourselves then the best we
      * can do is assume that HPD went high immediately before we were
      * called (and link training took zero time). Note that "no-hpd"
      * actually counts as handling HPD ourselves since we're doing the
      * worst case delay (in prepare) ourselves.
      *
      * NOTE: if we ever end up in this "if" statement then we're
      * guaranteed that the panel_edp_wait() call below will do no delay.
      * It already handles that case, though, so we don't need any special
      * code for it.
      */
     if (p->desc->delay.prepare_to_enable &&
         !panel_edp_can_read_hpd(p) && !p->no_hpd)
         delay = max(delay, p->desc->delay.prepare_to_enable);
 
     if (delay)
         msleep(delay);
 
     panel_edp_wait(p->prepared_time, p->desc->delay.prepare_to_enable);
 
     p->enabled = true;
 
     return 0;
 }
 
 static int panel_edp_get_modes(struct drm_panel *panel,
                    struct drm_connector *connector)
 {
     struct panel_edp *p = to_panel_edp(panel);
     int num = 0;
 
     /* probe EDID if a DDC bus is available */
     if (p->ddc) {
         pm_runtime_get_sync(panel->dev);
 
         if (!p->edid)
             p->edid = drm_get_edid(connector, p->ddc);
 
         if (p->edid)
             num += drm_add_edid_modes(connector, p->edid);
 
         pm_runtime_mark_last_busy(panel->dev);
         pm_runtime_put_autosuspend(panel->dev);
     }
 
     /*
      * Add hard-coded panel modes. Don't call this if there are no timings
      * and no modes (the generic edp-panel case) because it will clobber
      * the display_info that was already set by drm_add_edid_modes().
      */
     if (p->desc->num_timings || p->desc->num_modes)
         num += panel_edp_get_non_edid_modes(p, connector);
     else if (!num)
         dev_warn(p->base.dev, "No display modes\n");
 
     /*
      * TODO: Remove once all drm drivers call
      * drm_connector_set_orientation_from_panel()
      */
     drm_connector_set_panel_orientation(connector, p->orientation);
 
     return num;
 }
 
 static int panel_edp_get_timings(struct drm_panel *panel,
                  unsigned int num_timings,
                  struct display_timing *timings)
 {
     struct panel_edp *p = to_panel_edp(panel);
     unsigned int i;
 
     if (p->desc->num_timings < num_timings)
         num_timings = p->desc->num_timings;
 
     if (timings)
         for (i = 0; i < num_timings; i++)
             timings[i] = p->desc->timings[i];
 
     return p->desc->num_timings;
 }
 
 static enum drm_panel_orientation panel_edp_get_orientation(struct drm_panel *panel)
 {
     struct panel_edp *p = to_panel_edp(panel);
 
     return p->orientation;
 }
 
 static int detected_panel_show(struct seq_file *s, void *data)
 {
     struct drm_panel *panel = s->private;
     struct panel_edp *p = to_panel_edp(panel);
 
     if (IS_ERR(p->detected_panel))
         seq_puts(s, "UNKNOWN\n");
     else if (!p->detected_panel)
         seq_puts(s, "HARDCODED\n");
     else
         seq_printf(s, "%s\n", p->detected_panel->name);
 
     return 0;
 }
 
 DEFINE_SHOW_ATTRIBUTE(detected_panel);
 
 static void panel_edp_debugfs_init(struct drm_panel *panel, struct dentry *root)
 {
     debugfs_create_file("detected_panel", 0600, root, panel, &detected_panel_fops);
 }
 
 static const struct drm_panel_funcs panel_edp_funcs = {
     .disable = panel_edp_disable,
     .unprepare = panel_edp_unprepare,
     .prepare = panel_edp_prepare,
     .enable = panel_edp_enable,
     .get_modes = panel_edp_get_modes,
     .get_orientation = panel_edp_get_orientation,
     .get_timings = panel_edp_get_timings,
     .debugfs_init = panel_edp_debugfs_init,
 };
 
 #define PANEL_EDP_BOUNDS_CHECK(to_check, bounds, field) \
     (to_check->field.typ >= bounds->field.min && \
      to_check->field.typ <= bounds->field.max)
 static void panel_edp_parse_panel_timing_node(struct device *dev,
                           struct panel_edp *panel,
                           const struct display_timing *ot)
 {
     const struct panel_desc *desc = panel->desc;
     struct videomode vm;
     unsigned int i;
 
     if (WARN_ON(desc->num_modes)) {
         dev_err(dev, "Reject override mode: panel has a fixed mode\n");
         return;
     }
     if (WARN_ON(!desc->num_timings)) {
         dev_err(dev, "Reject override mode: no timings specified\n");
         return;
     }
 
     for (i = 0; i < panel->desc->num_timings; i++) {
         const struct display_timing *dt = &panel->desc->timings[i];
 
         if (!PANEL_EDP_BOUNDS_CHECK(ot, dt, hactive) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, hfront_porch) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, hback_porch) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, hsync_len) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, vactive) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, vfront_porch) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, vback_porch) ||
             !PANEL_EDP_BOUNDS_CHECK(ot, dt, vsync_len))
             continue;
 
         if (ot->flags != dt->flags)
             continue;
 
         videomode_from_timing(ot, &vm);
         drm_display_mode_from_videomode(&vm, &panel->override_mode);
         panel->override_mode.type |= DRM_MODE_TYPE_DRIVER |
                          DRM_MODE_TYPE_PREFERRED;
         break;
     }
 
     if (WARN_ON(!panel->override_mode.type))
         dev_err(dev, "Reject override mode: No display_timing found\n");
 }
 
 static const struct edp_panel_entry *find_edp_panel(u32 panel_id);
 
 static int generic_edp_panel_probe(struct device *dev, struct panel_edp *panel)
 {
     struct panel_desc *desc;
     u32 panel_id;
     char vend[4];
     u16 product_id;
     u32 reliable_ms = 0;
     u32 absent_ms = 0;
     int ret;
 
     desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
     if (!desc)
         return -ENOMEM;
     panel->desc = desc;
 
     /*
      * Read the dts properties for the initial probe. These are used by
      * the runtime resume code which will get called by the
      * pm_runtime_get_sync() call below.
      */
     of_property_read_u32(dev->of_node, "hpd-reliable-delay-ms", &reliable_ms);
     desc->delay.hpd_reliable = reliable_ms;
     of_property_read_u32(dev->of_node, "hpd-absent-delay-ms", &absent_ms);
     desc->delay.hpd_absent = absent_ms;
 
     /* Power the panel on so we can read the EDID */
     ret = pm_runtime_get_sync(dev);
     if (ret < 0) {
         dev_err(dev, "Couldn't power on panel to read EDID: %d\n", ret);
         goto exit;
     }
 
     panel_id = drm_edid_get_panel_id(panel->ddc);
     if (!panel_id) {
         dev_err(dev, "Couldn't identify panel via EDID\n");
         ret = -EIO;
         goto exit;
     }
     drm_edid_decode_panel_id(panel_id, vend, &product_id);
 
     panel->detected_panel = find_edp_panel(panel_id);
 
     /*
      * We're using non-optimized timings and want it really obvious that
      * someone needs to add an entry to the table, so we'll do a WARN_ON
      * splat.
      */
     if (WARN_ON(!panel->detected_panel)) {
         dev_warn(dev,
              "Unknown panel %s %#06x, using conservative timings\n",
              vend, product_id);
 
         /*
          * It's highly likely that the panel will work if we use very
          * conservative timings, so let's do that. We already know that
          * the HPD-related delays must have worked since we got this
          * far, so we really just need the "unprepare" / "enable"
          * delays. We don't need "prepare_to_enable" since that
          * overlaps the "enable" delay anyway.
          *
          * Nearly all panels have a "unprepare" delay of 500 ms though
          * there are a few with 1000. Let's stick 2000 in just to be
          * super conservative.
          *
          * An "enable" delay of 80 ms seems the most common, but we'll
          * throw in 200 ms to be safe.
          */
         desc->delay.unprepare = 2000;
         desc->delay.enable = 200;
 
         panel->detected_panel = ERR_PTR(-EINVAL);
     } else {
         dev_info(dev, "Detected %s %s (%#06x)\n",
              vend, panel->detected_panel->name, product_id);
 
         /* Update the delay; everything else comes from EDID */
         desc->delay = *panel->detected_panel->delay;
     }
 
     ret = 0;
 exit:
     pm_runtime_mark_last_busy(dev);
     pm_runtime_put_autosuspend(dev);
 
     return ret;
 }
 
 static int panel_edp_probe(struct device *dev, const struct panel_desc *desc,
                struct drm_dp_aux *aux)
 {
     struct panel_edp *panel;
     struct display_timing dt;
     struct device_node *ddc;
     int err;
 
     panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
     if (!panel)
         return -ENOMEM;
 
     panel->enabled = false;
     panel->prepared_time = 0;
     panel->desc = desc;
     panel->aux = aux;
 
     panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
     if (!panel->no_hpd) {
         err = panel_edp_get_hpd_gpio(dev, panel);
         if (err)
             return err;
     }
 
     panel->supply = devm_regulator_get(dev, "power");
     if (IS_ERR(panel->supply))
         return PTR_ERR(panel->supply);
 
     panel->enable_gpio = devm_gpiod_get_optional(dev, "enable",
                              GPIOD_OUT_LOW);
     if (IS_ERR(panel->enable_gpio)) {
         err = PTR_ERR(panel->enable_gpio);
         if (err != -EPROBE_DEFER)
             dev_err(dev, "failed to request GPIO: %d\n", err);
         return err;
     }
 
     err = of_drm_get_panel_orientation(dev->of_node, &panel->orientation);
     if (err) {
         dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, err);
         return err;
     }
 
     ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
     if (ddc) {
         panel->ddc = of_find_i2c_adapter_by_node(ddc);
         of_node_put(ddc);
 
         if (!panel->ddc)
             return -EPROBE_DEFER;
     } else if (aux) {
         panel->ddc = &aux->ddc;
     }
 
     if (!of_get_display_timing(dev->of_node, "panel-timing", &dt))
         panel_edp_parse_panel_timing_node(dev, panel, &dt);
 
     dev_set_drvdata(dev, panel);
 
     drm_panel_init(&panel->base, dev, &panel_edp_funcs, DRM_MODE_CONNECTOR_eDP);
 
     err = drm_panel_of_backlight(&panel->base);
     if (err)
         goto err_finished_ddc_init;
 
     /*
      * We use runtime PM for prepare / unprepare since those power the panel
      * on and off and those can be very slow operations. This is important
      * to optimize powering the panel on briefly to read the EDID before
      * fully enabling the panel.
      */
     pm_runtime_enable(dev);
     pm_runtime_set_autosuspend_delay(dev, 1000);
     pm_runtime_use_autosuspend(dev);
 
     if (of_device_is_compatible(dev->of_node, "edp-panel")) {
         err = generic_edp_panel_probe(dev, panel);
         if (err) {
             dev_err_probe(dev, err,
                       "Couldn't detect panel nor find a fallback\n");
             goto err_finished_pm_runtime;
         }
         /* generic_edp_panel_probe() replaces desc in the panel */
         desc = panel->desc;
     } else if (desc->bpc != 6 && desc->bpc != 8 && desc->bpc != 10) {
         dev_warn(dev, "Expected bpc in {6,8,10} but got: %u\n", desc->bpc);
     }
 
     if (!panel->base.backlight && panel->aux) {
         pm_runtime_get_sync(dev);
         err = drm_panel_dp_aux_backlight(&panel->base, panel->aux);
         pm_runtime_mark_last_busy(dev);
         pm_runtime_put_autosuspend(dev);
         if (err)
             goto err_finished_pm_runtime;
     }
 
     drm_panel_add(&panel->base);
 
     return 0;
 
 err_finished_pm_runtime:
     pm_runtime_dont_use_autosuspend(dev);
     pm_runtime_disable(dev);
 err_finished_ddc_init:
     if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
         put_device(&panel->ddc->dev);
 
     return err;
 }
 
 static int panel_edp_remove(struct device *dev)
 {
     struct panel_edp *panel = dev_get_drvdata(dev);
 
     drm_panel_remove(&panel->base);
     drm_panel_disable(&panel->base);
     drm_panel_unprepare(&panel->base);
 
     pm_runtime_dont_use_autosuspend(dev);
     pm_runtime_disable(dev);
     if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
         put_device(&panel->ddc->dev);
 
     kfree(panel->edid);
     panel->edid = NULL;
 
     return 0;
 }
 
 static void panel_edp_shutdown(struct device *dev)
 {
     struct panel_edp *panel = dev_get_drvdata(dev);
 
     drm_panel_disable(&panel->base);
     drm_panel_unprepare(&panel->base);
 }
 
 static const struct display_timing auo_b101ean01_timing = {
     .pixelclock = { 65300000, 72500000, 75000000 },
     .hactive = { 1280, 1280, 1280 },
     .hfront_porch = { 18, 119, 119 },
     .hback_porch = { 21, 21, 21 },
     .hsync_len = { 32, 32, 32 },
     .vactive = { 800, 800, 800 },
     .vfront_porch = { 4, 4, 4 },
     .vback_porch = { 8, 8, 8 },
     .vsync_len = { 18, 20, 20 },
 };
 
 static const struct panel_desc auo_b101ean01 = {
     .timings = &auo_b101ean01_timing,
     .num_timings = 1,
     .bpc = 6,
     .size = {
         .width = 217,
         .height = 136,
     },
 };
 
 static const struct drm_display_mode auo_b116xak01_mode = {
     .clock = 69300,
     .hdisplay = 1366,
     .hsync_start = 1366 + 48,
     .hsync_end = 1366 + 48 + 32,
     .htotal = 1366 + 48 + 32 + 10,
     .vdisplay = 768,
     .vsync_start = 768 + 4,
     .vsync_end = 768 + 4 + 6,
     .vtotal = 768 + 4 + 6 + 15,
     .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
 };
 
 static const struct panel_desc auo_b116xak01 = {
     .modes = &auo_b116xak01_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 256,
         .height = 144,
     },
     .delay = {
         .hpd_absent = 200,
     },
 };
 
 static const struct drm_display_mode auo_b116xw03_mode = {
     .clock = 70589,
     .hdisplay = 1366,
     .hsync_start = 1366 + 40,
     .hsync_end = 1366 + 40 + 40,
     .htotal = 1366 + 40 + 40 + 32,
     .vdisplay = 768,
     .vsync_start = 768 + 10,
     .vsync_end = 768 + 10 + 12,
     .vtotal = 768 + 10 + 12 + 6,
     .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
 };
 
 static const struct panel_desc auo_b116xw03 = {
     .modes = &auo_b116xw03_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 256,
         .height = 144,
     },
     .delay = {
         .enable = 400,
     },
 };
 
 static const struct drm_display_mode auo_b133han05_mode = {
     .clock = 142600,
     .hdisplay = 1920,
     .hsync_start = 1920 + 58,
     .hsync_end = 1920 + 58 + 42,
     .htotal = 1920 + 58 + 42 + 60,
     .vdisplay = 1080,
     .vsync_start = 1080 + 3,
     .vsync_end = 1080 + 3 + 5,
     .vtotal = 1080 + 3 + 5 + 54,
 };
 
 static const struct panel_desc auo_b133han05 = {
     .modes = &auo_b133han05_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 293,
         .height = 165,
     },
     .delay = {
         .hpd_reliable = 100,
         .enable = 20,
         .unprepare = 50,
     },
 };
 
 static const struct drm_display_mode auo_b133htn01_mode = {
     .clock = 150660,
     .hdisplay = 1920,
     .hsync_start = 1920 + 172,
     .hsync_end = 1920 + 172 + 80,
     .htotal = 1920 + 172 + 80 + 60,
     .vdisplay = 1080,
     .vsync_start = 1080 + 25,
     .vsync_end = 1080 + 25 + 10,
     .vtotal = 1080 + 25 + 10 + 10,
 };
 
 static const struct panel_desc auo_b133htn01 = {
     .modes = &auo_b133htn01_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 293,
         .height = 165,
     },
     .delay = {
         .hpd_reliable = 105,
         .enable = 20,
         .unprepare = 50,
     },
 };
 
 static const struct drm_display_mode auo_b133xtn01_mode = {
     .clock = 69500,
     .hdisplay = 1366,
     .hsync_start = 1366 + 48,
     .hsync_end = 1366 + 48 + 32,
     .htotal = 1366 + 48 + 32 + 20,
     .vdisplay = 768,
     .vsync_start = 768 + 3,
     .vsync_end = 768 + 3 + 6,
     .vtotal = 768 + 3 + 6 + 13,
 };
 
 static const struct panel_desc auo_b133xtn01 = {
     .modes = &auo_b133xtn01_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 293,
         .height = 165,
     },
 };
 
 static const struct drm_display_mode auo_b140han06_mode = {
     .clock = 141000,
     .hdisplay = 1920,
     .hsync_start = 1920 + 16,
     .hsync_end = 1920 + 16 + 16,
     .htotal = 1920 + 16 + 16 + 152,
     .vdisplay = 1080,
     .vsync_start = 1080 + 3,
     .vsync_end = 1080 + 3 + 14,
     .vtotal = 1080 + 3 + 14 + 19,
 };
 
 static const struct panel_desc auo_b140han06 = {
     .modes = &auo_b140han06_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 309,
         .height = 174,
     },
     .delay = {
         .hpd_reliable = 100,
         .enable = 20,
         .unprepare = 50,
     },
 };
 
 static const struct drm_display_mode boe_nv101wxmn51_modes[] = {
     {
         .clock = 71900,
         .hdisplay = 1280,
         .hsync_start = 1280 + 48,
         .hsync_end = 1280 + 48 + 32,
         .htotal = 1280 + 48 + 32 + 80,
         .vdisplay = 800,
         .vsync_start = 800 + 3,
         .vsync_end = 800 + 3 + 5,
         .vtotal = 800 + 3 + 5 + 24,
     },
     {
         .clock = 57500,
         .hdisplay = 1280,
         .hsync_start = 1280 + 48,
         .hsync_end = 1280 + 48 + 32,
         .htotal = 1280 + 48 + 32 + 80,
         .vdisplay = 800,
         .vsync_start = 800 + 3,
         .vsync_end = 800 + 3 + 5,
         .vtotal = 800 + 3 + 5 + 24,
     },
 };
 
 static const struct panel_desc boe_nv101wxmn51 = {
     .modes = boe_nv101wxmn51_modes,
     .num_modes = ARRAY_SIZE(boe_nv101wxmn51_modes),
     .bpc = 8,
     .size = {
         .width = 217,
         .height = 136,
     },
     .delay = {
         /* TODO: should be hpd-absent and no-hpd should be set? */
         .hpd_reliable = 210,
         .enable = 50,
         .unprepare = 160,
     },
 };
 
 static const struct drm_display_mode boe_nv110wtm_n61_modes[] = {
     {
         .clock = 207800,
         .hdisplay = 2160,
         .hsync_start = 2160 + 48,
         .hsync_end = 2160 + 48 + 32,
         .htotal = 2160 + 48 + 32 + 100,
         .vdisplay = 1440,
         .vsync_start = 1440 + 3,
         .vsync_end = 1440 + 3 + 6,
         .vtotal = 1440 + 3 + 6 + 31,
         .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
     },
     {
         .clock = 138500,
         .hdisplay = 2160,
         .hsync_start = 2160 + 48,
         .hsync_end = 2160 + 48 + 32,
         .htotal = 2160 + 48 + 32 + 100,
         .vdisplay = 1440,
         .vsync_start = 1440 + 3,
         .vsync_end = 1440 + 3 + 6,
         .vtotal = 1440 + 3 + 6 + 31,
         .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
     },
 };
 
 static const struct panel_desc boe_nv110wtm_n61 = {
     .modes = boe_nv110wtm_n61_modes,
     .num_modes = ARRAY_SIZE(boe_nv110wtm_n61_modes),
     .bpc = 8,
     .size = {
         .width = 233,
         .height = 155,
     },
     .delay = {
         .hpd_absent = 200,
         .prepare_to_enable = 80,
         .enable = 50,
         .unprepare = 500,
     },
 };
 
 /* Also used for boe_nv133fhm_n62 */
 static const struct drm_display_mode boe_nv133fhm_n61_modes = {
     .clock = 147840,
     .hdisplay = 1920,
     .hsync_start = 1920 + 48,
     .hsync_end = 1920 + 48 + 32,
     .htotal = 1920 + 48 + 32 + 200,
     .vdisplay = 1080,
     .vsync_start = 1080 + 3,
     .vsync_end = 1080 + 3 + 6,
     .vtotal = 1080 + 3 + 6 + 31,
     .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
 };
 
 /* Also used for boe_nv133fhm_n62 */
 static const struct panel_desc boe_nv133fhm_n61 = {
     .modes = &boe_nv133fhm_n61_modes,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 294,
         .height = 165,
     },
     .delay = {
         /*
          * When power is first given to the panel there's a short
          * spike on the HPD line.  It was explained that this spike
          * was until the TCON data download was complete.  On
          * one system this was measured at 8 ms.  We'll put 15 ms
          * in the prepare delay just to be safe.  That means:
          * - If HPD isn't hooked up you still have 200 ms delay.
          * - If HPD is hooked up we won't try to look at it for the
          *   first 15 ms.
          */
         .hpd_reliable = 15,
         .hpd_absent = 200,
 
         .unprepare = 500,
     },
 };
 
 static const struct drm_display_mode boe_nv140fhmn49_modes[] = {
     {
         .clock = 148500,
         .hdisplay = 1920,
         .hsync_start = 1920 + 48,
         .hsync_end = 1920 + 48 + 32,
         .htotal = 2200,
         .vdisplay = 1080,
         .vsync_start = 1080 + 3,
         .vsync_end = 1080 + 3 + 5,
         .vtotal = 1125,
     },
 };
 
 static const struct panel_desc boe_nv140fhmn49 = {
     .modes = boe_nv140fhmn49_modes,
     .num_modes = ARRAY_SIZE(boe_nv140fhmn49_modes),
     .bpc = 6,
     .size = {
         .width = 309,
         .height = 174,
     },
     .delay = {
         /* TODO: should be hpd-absent and no-hpd should be set? */
         .hpd_reliable = 210,
         .enable = 50,
         .unprepare = 160,
     },
 };
 
 static const struct drm_display_mode innolux_n116bca_ea1_mode = {
     .clock = 76420,
     .hdisplay = 1366,
     .hsync_start = 1366 + 136,
     .hsync_end = 1366 + 136 + 30,
     .htotal = 1366 + 136 + 30 + 60,
     .vdisplay = 768,
     .vsync_start = 768 + 8,
     .vsync_end = 768 + 8 + 12,
     .vtotal = 768 + 8 + 12 + 12,
     .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 };
 
 static const struct panel_desc innolux_n116bca_ea1 = {
     .modes = &innolux_n116bca_ea1_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 256,
         .height = 144,
     },
     .delay = {
         .hpd_absent = 200,
         .enable = 80,
         .disable = 50,
         .unprepare = 500,
     },
 };
 
 /*
  * Datasheet specifies that at 60 Hz refresh rate:
  * - total horizontal time: { 1506, 1592, 1716 }
  * - total vertical time: { 788, 800, 868 }
  *
  * ...but doesn't go into exactly how that should be split into a front
  * porch, back porch, or sync length.  For now we'll leave a single setting
  * here which allows a bit of tweaking of the pixel clock at the expense of
  * refresh rate.
  */
 static const struct display_timing innolux_n116bge_timing = {
     .pixelclock = { 72600000, 76420000, 80240000 },
     .hactive = { 1366, 1366, 1366 },
     .hfront_porch = { 136, 136, 136 },
     .hback_porch = { 60, 60, 60 },
     .hsync_len = { 30, 30, 30 },
     .vactive = { 768, 768, 768 },
     .vfront_porch = { 8, 8, 8 },
     .vback_porch = { 12, 12, 12 },
     .vsync_len = { 12, 12, 12 },
     .flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW,
 };
 
 static const struct panel_desc innolux_n116bge = {
     .timings = &innolux_n116bge_timing,
     .num_timings = 1,
     .bpc = 6,
     .size = {
         .width = 256,
         .height = 144,
     },
 };
 
 static const struct drm_display_mode innolux_n125hce_gn1_mode = {
     .clock = 162000,
     .hdisplay = 1920,
     .hsync_start = 1920 + 40,
     .hsync_end = 1920 + 40 + 40,
     .htotal = 1920 + 40 + 40 + 80,
     .vdisplay = 1080,
     .vsync_start = 1080 + 4,
     .vsync_end = 1080 + 4 + 4,
     .vtotal = 1080 + 4 + 4 + 24,
 };
 
 static const struct panel_desc innolux_n125hce_gn1 = {
     .modes = &innolux_n125hce_gn1_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 276,
         .height = 155,
     },
 };
 
 static const struct drm_display_mode innolux_p120zdg_bf1_mode = {
     .clock = 206016,
     .hdisplay = 2160,
     .hsync_start = 2160 + 48,
     .hsync_end = 2160 + 48 + 32,
     .htotal = 2160 + 48 + 32 + 80,
     .vdisplay = 1440,
     .vsync_start = 1440 + 3,
     .vsync_end = 1440 + 3 + 10,
     .vtotal = 1440 + 3 + 10 + 27,
     .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
 };
 
 static const struct panel_desc innolux_p120zdg_bf1 = {
     .modes = &innolux_p120zdg_bf1_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 254,
         .height = 169,
     },
     .delay = {
         .hpd_absent = 200,
         .unprepare = 500,
     },
 };
 
 static const struct drm_display_mode ivo_m133nwf4_r0_mode = {
     .clock = 138778,
     .hdisplay = 1920,
     .hsync_start = 1920 + 24,
     .hsync_end = 1920 + 24 + 48,
     .htotal = 1920 + 24 + 48 + 88,
     .vdisplay = 1080,
     .vsync_start = 1080 + 3,
     .vsync_end = 1080 + 3 + 12,
     .vtotal = 1080 + 3 + 12 + 17,
     .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
 };
 
 static const struct panel_desc ivo_m133nwf4_r0 = {
     .modes = &ivo_m133nwf4_r0_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 294,
         .height = 165,
     },
     .delay = {
         .hpd_absent = 200,
         .unprepare = 500,
     },
 };
 
 static const struct drm_display_mode kingdisplay_kd116n21_30nv_a010_mode = {
     .clock = 81000,
     .hdisplay = 1366,
     .hsync_start = 1366 + 40,
     .hsync_end = 1366 + 40 + 32,
     .htotal = 1366 + 40 + 32 + 62,
     .vdisplay = 768,
     .vsync_start = 768 + 5,
     .vsync_end = 768 + 5 + 5,
     .vtotal = 768 + 5 + 5 + 122,
     .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
 };
 
 static const struct panel_desc kingdisplay_kd116n21_30nv_a010 = {
     .modes = &kingdisplay_kd116n21_30nv_a010_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 256,
         .height = 144,
     },
     .delay = {
         .hpd_absent = 200,
     },
 };
 
 static const struct drm_display_mode lg_lp079qx1_sp0v_mode = {
     .clock = 200000,
     .hdisplay = 1536,
     .hsync_start = 1536 + 12,
     .hsync_end = 1536 + 12 + 16,
     .htotal = 1536 + 12 + 16 + 48,
     .vdisplay = 2048,
     .vsync_start = 2048 + 8,
     .vsync_end = 2048 + 8 + 4,
     .vtotal = 2048 + 8 + 4 + 8,
     .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
 };
 
 static const struct panel_desc lg_lp079qx1_sp0v = {
     .modes = &lg_lp079qx1_sp0v_mode,
     .num_modes = 1,
     .size = {
         .width = 129,
         .height = 171,
     },
 };
 
 static const struct drm_display_mode lg_lp097qx1_spa1_mode = {
     .clock = 205210,
     .hdisplay = 2048,
     .hsync_start = 2048 + 150,
     .hsync_end = 2048 + 150 + 5,
     .htotal = 2048 + 150 + 5 + 5,
     .vdisplay = 1536,
     .vsync_start = 1536 + 3,
     .vsync_end = 1536 + 3 + 1,
     .vtotal = 1536 + 3 + 1 + 9,
 };
 
 static const struct panel_desc lg_lp097qx1_spa1 = {
     .modes = &lg_lp097qx1_spa1_mode,
     .num_modes = 1,
     .size = {
         .width = 208,
         .height = 147,
     },
 };
 
 static const struct drm_display_mode lg_lp120up1_mode = {
     .clock = 162300,
     .hdisplay = 1920,
     .hsync_start = 1920 + 40,
     .hsync_end = 1920 + 40 + 40,
     .htotal = 1920 + 40 + 40 + 80,
     .vdisplay = 1280,
     .vsync_start = 1280 + 4,
     .vsync_end = 1280 + 4 + 4,
     .vtotal = 1280 + 4 + 4 + 12,
 };
 
 static const struct panel_desc lg_lp120up1 = {
     .modes = &lg_lp120up1_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 267,
         .height = 183,
     },
 };
 
 static const struct drm_display_mode lg_lp129qe_mode = {
     .clock = 285250,
     .hdisplay = 2560,
     .hsync_start = 2560 + 48,
     .hsync_end = 2560 + 48 + 32,
     .htotal = 2560 + 48 + 32 + 80,
     .vdisplay = 1700,
     .vsync_start = 1700 + 3,
     .vsync_end = 1700 + 3 + 10,
     .vtotal = 1700 + 3 + 10 + 36,
 };
 
 static const struct panel_desc lg_lp129qe = {
     .modes = &lg_lp129qe_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 272,
         .height = 181,
     },
 };
 
 static const struct drm_display_mode neweast_wjfh116008a_modes[] = {
     {
         .clock = 138500,
         .hdisplay = 1920,
         .hsync_start = 1920 + 48,
         .hsync_end = 1920 + 48 + 32,
         .htotal = 1920 + 48 + 32 + 80,
         .vdisplay = 1080,
         .vsync_start = 1080 + 3,
         .vsync_end = 1080 + 3 + 5,
         .vtotal = 1080 + 3 + 5 + 23,
         .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
     }, {
         .clock = 110920,
         .hdisplay = 1920,
         .hsync_start = 1920 + 48,
         .hsync_end = 1920 + 48 + 32,
         .htotal = 1920 + 48 + 32 + 80,
         .vdisplay = 1080,
         .vsync_start = 1080 + 3,
         .vsync_end = 1080 + 3 + 5,
         .vtotal = 1080 + 3 + 5 + 23,
         .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
     }
 };
 
 static const struct panel_desc neweast_wjfh116008a = {
     .modes = neweast_wjfh116008a_modes,
     .num_modes = 2,
     .bpc = 6,
     .size = {
         .width = 260,
         .height = 150,
     },
     .delay = {
         .hpd_reliable = 110,
         .enable = 20,
         .unprepare = 500,
     },
 };
 
 static const struct drm_display_mode samsung_lsn122dl01_c01_mode = {
     .clock = 271560,
     .hdisplay = 2560,
     .hsync_start = 2560 + 48,
     .hsync_end = 2560 + 48 + 32,
     .htotal = 2560 + 48 + 32 + 80,
     .vdisplay = 1600,
     .vsync_start = 1600 + 2,
     .vsync_end = 1600 + 2 + 5,
     .vtotal = 1600 + 2 + 5 + 57,
 };
 
 static const struct panel_desc samsung_lsn122dl01_c01 = {
     .modes = &samsung_lsn122dl01_c01_mode,
     .num_modes = 1,
     .size = {
         .width = 263,
         .height = 164,
     },
 };
 
 static const struct drm_display_mode samsung_ltn140at29_301_mode = {
     .clock = 76300,
     .hdisplay = 1366,
     .hsync_start = 1366 + 64,
     .hsync_end = 1366 + 64 + 48,
     .htotal = 1366 + 64 + 48 + 128,
     .vdisplay = 768,
     .vsync_start = 768 + 2,
     .vsync_end = 768 + 2 + 5,
     .vtotal = 768 + 2 + 5 + 17,
 };
 
 static const struct panel_desc samsung_ltn140at29_301 = {
     .modes = &samsung_ltn140at29_301_mode,
     .num_modes = 1,
     .bpc = 6,
     .size = {
         .width = 320,
         .height = 187,
     },
 };
 
 static const struct drm_display_mode sharp_ld_d5116z01b_mode = {
     .clock = 168480,
     .hdisplay = 1920,
     .hsync_start = 1920 + 48,
     .hsync_end = 1920 + 48 + 32,
     .htotal = 1920 + 48 + 32 + 80,
     .vdisplay = 1280,
     .vsync_start = 1280 + 3,
     .vsync_end = 1280 + 3 + 10,
     .vtotal = 1280 + 3 + 10 + 57,
     .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
 };
 
 static const struct panel_desc sharp_ld_d5116z01b = {
     .modes = &sharp_ld_d5116z01b_mode,
     .num_modes = 1,
     .bpc = 8,
     .size = {
         .width = 260,
         .height = 120,
     },
 };
 
 static const struct display_timing sharp_lq123p1jx31_timing = {
     .pixelclock = { 252750000, 252750000, 266604720 },
     .hactive = { 2400, 2400, 2400 },
     .hfront_porch = { 48, 48, 48 },
     .hback_porch = { 80, 80, 84 },
     .hsync_len = { 32, 32, 32 },
     .vactive = { 1600, 1600, 1600 },
     .vfront_porch = { 3, 3, 3 },
     .vback_porch = { 33, 33, 120 },
     .vsync_len = { 10, 10, 10 },
     .flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW,
 };
 
 static const struct panel_desc sharp_lq123p1jx31 = {
     .timings = &sharp_lq123p1jx31_timing,
     .num_timings = 1,
     .bpc = 8,
     .size = {
         .width = 259,
         .height = 173,
     },
     .delay = {
         .hpd_reliable = 110,
         .enable = 50,
         .unprepare = 550,
     },
 };
 
 static const struct drm_display_mode sharp_lq140m1jw46_mode[] = {
     {
         .clock = 346500,
         .hdisplay = 1920,
         .hsync_start = 1920 + 48,
         .hsync_end = 1920 + 48 + 32,
         .htotal = 1920 + 48 + 32 + 80,
         .vdisplay = 1080,
         .vsync_start = 1080 + 3,
         .vsync_end = 1080 + 3 + 5,
         .vtotal = 1080 + 3 + 5 + 69,
         .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
     }, {
         .clock = 144370,
         .hdisplay = 1920,
         .hsync_start = 1920 + 48,
         .hsync_end = 1920 + 48 + 32,
         .htotal = 1920 + 48 + 32 + 80,
         .vdisplay = 1080,
         .vsync_start = 1080 + 3,
         .vsync_end = 1080 + 3 + 5,
         .vtotal = 1080 + 3 + 5 + 69,
         .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
     },
 };
 
 static const struct panel_desc sharp_lq140m1jw46 = {
     .modes = sharp_lq140m1jw46_mode,
     .num_modes = ARRAY_SIZE(sharp_lq140m1jw46_mode),
     .bpc = 8,
     .size = {
         .width = 309,
         .height = 174,
     },
     .delay = {
         .hpd_absent = 80,
         .enable = 50,
         .unprepare = 500,
     },
 };
 
 static const struct drm_display_mode starry_kr122ea0sra_mode = {
     .clock = 147000,
     .hdisplay = 1920,
     .hsync_start = 1920 + 16,
     .hsync_end = 1920 + 16 + 16,
     .htotal = 1920 + 16 + 16 + 32,
     .vdisplay = 1200,
     .vsync_start = 1200 + 15,
     .vsync_end = 1200 + 15 + 2,
     .vtotal = 1200 + 15 + 2 + 18,
     .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
 };
 
 static const struct panel_desc starry_kr122ea0sra = {
     .modes = &starry_kr122ea0sra_mode,
     .num_modes = 1,
     .size = {
         .width = 263,
         .height = 164,
     },
     .delay = {
         /* TODO: should be hpd-absent and no-hpd should be set? */
         .hpd_reliable = 10 + 200,
         .enable = 50,
         .unprepare = 10 + 500,
     },
 };
 
 static const struct of_device_id platform_of_match[] = {
     {
         /* Must be first */
         .compatible = "edp-panel",
     }, {
         .compatible = "auo,b101ean01",
         .data = &auo_b101ean01,
     }, {
         .compatible = "auo,b116xa01",
         .data = &auo_b116xak01,
     }, {
         .compatible = "auo,b116xw03",
         .data = &auo_b116xw03,
     }, {
         .compatible = "auo,b133han05",
         .data = &auo_b133han05,
     }, {
         .compatible = "auo,b133htn01",
         .data = &auo_b133htn01,
     }, {
         .compatible = "auo,b133xtn01",
         .data = &auo_b133xtn01,
     }, {
         .compatible = "auo,b140han06",
         .data = &auo_b140han06,
     }, {
         .compatible = "boe,nv101wxmn51",
         .data = &boe_nv101wxmn51,
     }, {
         .compatible = "boe,nv110wtm-n61",
         .data = &boe_nv110wtm_n61,
     }, {
         .compatible = "boe,nv133fhm-n61",
         .data = &boe_nv133fhm_n61,
     }, {
         .compatible = "boe,nv133fhm-n62",
         .data = &boe_nv133fhm_n61,
     }, {
         .compatible = "boe,nv140fhmn49",
         .data = &boe_nv140fhmn49,
     }, {
         .compatible = "innolux,n116bca-ea1",
         .data = &innolux_n116bca_ea1,
     }, {
         .compatible = "innolux,n116bge",
         .data = &innolux_n116bge,
     }, {
         .compatible = "innolux,n125hce-gn1",
         .data = &innolux_n125hce_gn1,
     }, {
         .compatible = "innolux,p120zdg-bf1",
         .data = &innolux_p120zdg_bf1,
     }, {
         .compatible = "ivo,m133nwf4-r0",
         .data = &ivo_m133nwf4_r0,
     }, {
         .compatible = "kingdisplay,kd116n21-30nv-a010",
         .data = &kingdisplay_kd116n21_30nv_a010,
     }, {
         .compatible = "lg,lp079qx1-sp0v",
         .data = &lg_lp079qx1_sp0v,
     }, {
         .compatible = "lg,lp097qx1-spa1",
         .data = &lg_lp097qx1_spa1,
     }, {
         .compatible = "lg,lp120up1",
         .data = &lg_lp120up1,
     }, {
         .compatible = "lg,lp129qe",
         .data = &lg_lp129qe,
     }, {
         .compatible = "neweast,wjfh116008a",
         .data = &neweast_wjfh116008a,
     }, {
         .compatible = "samsung,lsn122dl01-c01",
         .data = &samsung_lsn122dl01_c01,
     }, {
         .compatible = "samsung,ltn140at29-301",
         .data = &samsung_ltn140at29_301,
     }, {
         .compatible = "sharp,ld-d5116z01b",
         .data = &sharp_ld_d5116z01b,
     }, {
         .compatible = "sharp,lq123p1jx31",
         .data = &sharp_lq123p1jx31,
     }, {
         .compatible = "sharp,lq140m1jw46",
         .data = &sharp_lq140m1jw46,
     }, {
         .compatible = "starry,kr122ea0sra",
         .data = &starry_kr122ea0sra,
     }, {
         /* sentinel */
     }
 };
 MODULE_DEVICE_TABLE(of, platform_of_match);
 
 static const struct panel_delay delay_200_500_p2e80 = {
     .hpd_absent = 200,
     .unprepare = 500,
     .prepare_to_enable = 80,
 };
 
 static const struct panel_delay delay_200_500_p2e100 = {
     .hpd_absent = 200,
     .unprepare = 500,
     .prepare_to_enable = 100,
 };
 
 static const struct panel_delay delay_200_500_e50 = {
     .hpd_absent = 200,
     .unprepare = 500,
     .enable = 50,
 };
 
 static const struct panel_delay delay_200_500_e80_d50 = {
     .hpd_absent = 200,
     .unprepare = 500,
     .enable = 80,
     .disable = 50,
 };
 
 static const struct panel_delay delay_100_500_e200 = {
     .hpd_absent = 100,
     .unprepare = 500,
     .enable = 200,
 };
 
 #define EDP_PANEL_ENTRY(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _delay, _name) \
 { \
     .name = _name, \
     .panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \
                          product_id), \
     .delay = _delay \
 }
 
 /*
  * This table is used to figure out power sequencing delays for panels that
  * are detected by EDID. Entries here may point to entries in the
  * platform_of_match table (if a panel is listed in both places).
  *
  * Sort first by vendor, then by product ID.
  */
 static const struct edp_panel_entry edp_panels[] = {
     EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01"),
     EDP_PANEL_ENTRY('A', 'U', 'O', 0x615c, &delay_200_500_e50, "B116XAN06.1"),
     EDP_PANEL_ENTRY('A', 'U', 'O', 0x8594, &delay_200_500_e50, "B133UAN01.0"),
 
     EDP_PANEL_ENTRY('B', 'O', 'E', 0x0786, &delay_200_500_p2e80, "NV116WHM-T01"),
     EDP_PANEL_ENTRY('B', 'O', 'E', 0x07d1, &boe_nv133fhm_n61.delay, "NV133FHM-N61"),
     EDP_PANEL_ENTRY('B', 'O', 'E', 0x082d, &boe_nv133fhm_n61.delay, "NV133FHM-N62"),
     EDP_PANEL_ENTRY('B', 'O', 'E', 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"),
     EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a5d, &delay_200_500_e50, "NV116WHM-N45"),
 
     EDP_PANEL_ENTRY('C', 'M', 'N', 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"),
 
     EDP_PANEL_ENTRY('K', 'D', 'B', 0x0624, &kingdisplay_kd116n21_30nv_a010.delay, "116N21-30NV-A010"),
     EDP_PANEL_ENTRY('K', 'D', 'B', 0x1120, &delay_200_500_e80_d50, "116N29-30NK-C007"),
 
     EDP_PANEL_ENTRY('S', 'H', 'P', 0x1511, &delay_200_500_e50, "LQ140M1JW48"),
     EDP_PANEL_ENTRY('S', 'H', 'P', 0x1523, &sharp_lq140m1jw46.delay, "LQ140M1JW46"),
     EDP_PANEL_ENTRY('S', 'H', 'P', 0x154c, &delay_200_500_p2e100, "LQ116M1JW10"),
 
     EDP_PANEL_ENTRY('S', 'T', 'A', 0x0100, &delay_100_500_e200, "2081116HHD028001-51D"),
 
     { /* sentinal */ }
 };
 
 static const struct edp_panel_entry *find_edp_panel(u32 panel_id)
 {
     const struct edp_panel_entry *panel;
 
     if (!panel_id)
         return NULL;
 
     for (panel = edp_panels; panel->panel_id; panel++)
         if (panel->panel_id == panel_id)
             return panel;
 
     return NULL;
 }
 
 static int panel_edp_platform_probe(struct platform_device *pdev)
 {
     const struct of_device_id *id;
 
     /* Skip one since "edp-panel" is only supported on DP AUX bus */
     id = of_match_node(platform_of_match + 1, pdev->dev.of_node);
     if (!id)
         return -ENODEV;
 
     return panel_edp_probe(&pdev->dev, id->data, NULL);
 }
 
 static int panel_edp_platform_remove(struct platform_device *pdev)
 {
     return panel_edp_remove(&pdev->dev);
 }
 
 static void panel_edp_platform_shutdown(struct platform_device *pdev)
 {
     panel_edp_shutdown(&pdev->dev);
 }
 
 static const struct dev_pm_ops panel_edp_pm_ops = {
     SET_RUNTIME_PM_OPS(panel_edp_suspend, panel_edp_resume, NULL)
     SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
                 pm_runtime_force_resume)
 };
 
 static struct platform_driver panel_edp_platform_driver = {
     .driver = {
         .name = "panel-edp",
         .of_match_table = platform_of_match,
         .pm = &panel_edp_pm_ops,
     },
     .probe = panel_edp_platform_probe,
     .remove = panel_edp_platform_remove,
     .shutdown = panel_edp_platform_shutdown,
 };
 
 static int panel_edp_dp_aux_ep_probe(struct dp_aux_ep_device *aux_ep)
 {
     const struct of_device_id *id;
 
     id = of_match_node(platform_of_match, aux_ep->dev.of_node);
     if (!id)
         return -ENODEV;
 
     return panel_edp_probe(&aux_ep->dev, id->data, aux_ep->aux);
 }
 
 static void panel_edp_dp_aux_ep_remove(struct dp_aux_ep_device *aux_ep)
 {
     panel_edp_remove(&aux_ep->dev);
 }
 
 static void panel_edp_dp_aux_ep_shutdown(struct dp_aux_ep_device *aux_ep)
 {
     panel_edp_shutdown(&aux_ep->dev);
 }
 
 static struct dp_aux_ep_driver panel_edp_dp_aux_ep_driver = {
     .driver = {
         .name = "panel-simple-dp-aux",
         .of_match_table = platform_of_match,    /* Same as platform one! */
         .pm = &panel_edp_pm_ops,
     },
     .probe = panel_edp_dp_aux_ep_probe,
     .remove = panel_edp_dp_aux_ep_remove,
     .shutdown = panel_edp_dp_aux_ep_shutdown,
 };
 
 static int __init panel_edp_init(void)
 {
     int err;
 
     err = platform_driver_register(&panel_edp_platform_driver);
     if (err < 0)
         return err;
 
     err = dp_aux_dp_driver_register(&panel_edp_dp_aux_ep_driver);
     if (err < 0)
         goto err_did_platform_register;
 
     return 0;
 
 err_did_platform_register:
     platform_driver_unregister(&panel_edp_platform_driver);
 
     return err;
 }
 module_init(panel_edp_init);
 
 static void __exit panel_edp_exit(void)
 {
     dp_aux_dp_driver_unregister(&panel_edp_dp_aux_ep_driver);
     platform_driver_unregister(&panel_edp_platform_driver);
 }
 module_exit(panel_edp_exit);
 
 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
 MODULE_DESCRIPTION("DRM Driver for Simple eDP Panels");
 MODULE_LICENSE("GPL and additional rights");

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