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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/panel/panel-edp.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/panel/panel-edp.c')
-rw-r--r--drivers/gpu/drm/panel/panel-edp.c2002
1 files changed, 2002 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
new file mode 100644
index 0000000000..7dc6fb7308
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -0,0 +1,2002 @@
+/*
+ * 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 appears 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_boottime();
+
+ 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_boottime();
+
+ 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)
+{
+ p->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
+ if (IS_ERR(p->hpd_gpio))
+ return dev_err_probe(dev, PTR_ERR(p->hpd_gpio),
+ "failed to get 'hpd' GPIO\n");
+
+ 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_boottime();
+
+ return 0;
+
+error:
+ gpiod_set_value_cansleep(p->enable_gpio, 0);
+ regulator_disable(p->supply);
+ p->unprepared_time = ktime_get_boottime();
+
+ 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))
+ return dev_err_probe(dev, PTR_ERR(panel->enable_gpio),
+ "failed to request GPIO\n");
+
+ 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 void 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;
+}
+
+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,
+ .unprepare = 500,
+ .enable = 50,
+ },
+};
+
+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,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,
+};
+
+static const struct panel_delay delay_200_500_e200 = {
+ .hpd_absent = 200,
+ .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', 0x1062, &delay_200_500_e50, "B120XAN01.0"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x145c, &delay_200_500_e50, "B116XAB01.4"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x1e9b, &delay_200_500_e50, "B133UAN02.1"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x1ea5, &delay_200_500_e50, "B116XAK01.6"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x235c, &delay_200_500_e50, "B116XTN02.3"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01.0"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x582d, &delay_200_500_e50, "B133UAN01.0"),
+ 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', 0x09c3, &delay_200_500_e50, "NT116WHM-N21,836X2"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x094b, &delay_200_500_e50, "NT116WHM-N21"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x095f, &delay_200_500_e50, "NE135FBM-N41 v8.1"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x0979, &delay_200_500_e50, "NV116WHM-N49 V8.0"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x09dd, &delay_200_500_e50, "NT116WHM-N21"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a5d, &delay_200_500_e50, "NV116WHM-N45"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x0ac5, &delay_200_500_e50, "NV116WHM-N4C"),
+
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x1139, &delay_200_500_e80_d50, "N116BGE-EA2"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x1152, &delay_200_500_e80_d50, "N116BCN-EA1"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x1153, &delay_200_500_e80_d50, "N116BGE-EA2"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x1154, &delay_200_500_e80_d50, "N116BCA-EA2"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x1247, &delay_200_500_e80_d50, "N120ACA-EA1"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x14d4, &delay_200_500_e80_d50, "N140HCA-EAC"),
+
+ EDP_PANEL_ENTRY('I', 'V', 'O', 0x057d, &delay_200_500_e200, "R140NWF5 RH"),
+ EDP_PANEL_ENTRY('I', 'V', 'O', 0x854a, &delay_200_500_p2e100, "M133NW4J"),
+ EDP_PANEL_ENTRY('I', 'V', 'O', 0x854b, &delay_200_500_p2e100, "R133NW4K-R0"),
+
+ 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 void panel_edp_platform_remove(struct platform_device *pdev)
+{
+ 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_new = 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");