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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-dsi-cm.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-dsi-cm.c')
-rw-r--r--drivers/gpu/drm/panel/panel-dsi-cm.c652
1 files changed, 652 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c
new file mode 100644
index 0000000000..6b3f4d664d
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-dsi-cm.c
@@ -0,0 +1,652 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic DSI Command Mode panel driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+#define DCS_GET_ID1 0xda
+#define DCS_GET_ID2 0xdb
+#define DCS_GET_ID3 0xdc
+
+#define DCS_REGULATOR_SUPPLY_NUM 2
+
+static const struct of_device_id dsicm_of_match[];
+
+struct dsic_panel_data {
+ u32 xres;
+ u32 yres;
+ u32 refresh;
+ u32 width_mm;
+ u32 height_mm;
+ u32 max_hs_rate;
+ u32 max_lp_rate;
+ bool te_support;
+};
+
+struct panel_drv_data {
+ struct mipi_dsi_device *dsi;
+ struct drm_panel panel;
+ struct drm_display_mode mode;
+
+ struct mutex lock;
+
+ struct backlight_device *bldev;
+ struct backlight_device *extbldev;
+
+ unsigned long hw_guard_end; /* next value of jiffies when we can
+ * issue the next sleep in/out command
+ */
+ unsigned long hw_guard_wait; /* max guard time in jiffies */
+
+ const struct dsic_panel_data *panel_data;
+
+ struct gpio_desc *reset_gpio;
+
+ struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM];
+
+ bool use_dsi_backlight;
+
+ /* runtime variables */
+ bool enabled;
+
+ bool intro_printed;
+};
+
+static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel)
+{
+ return container_of(panel, struct panel_drv_data, panel);
+}
+
+static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable)
+{
+ struct backlight_device *backlight;
+
+ if (ddata->bldev)
+ backlight = ddata->bldev;
+ else if (ddata->extbldev)
+ backlight = ddata->extbldev;
+ else
+ return;
+
+ if (enable)
+ backlight_enable(backlight);
+ else
+ backlight_disable(backlight);
+}
+
+static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
+{
+ ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
+ ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
+}
+
+static void hw_guard_wait(struct panel_drv_data *ddata)
+{
+ unsigned long wait = ddata->hw_guard_end - jiffies;
+
+ if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(wait);
+ }
+}
+
+static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data)
+{
+ return mipi_dsi_dcs_read(ddata->dsi, dcs_cmd, data, 1);
+}
+
+static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param)
+{
+ return mipi_dsi_dcs_write(ddata->dsi, dcs_cmd, &param, 1);
+}
+
+static int dsicm_sleep_in(struct panel_drv_data *ddata)
+
+{
+ int r;
+
+ hw_guard_wait(ddata);
+
+ r = mipi_dsi_dcs_enter_sleep_mode(ddata->dsi);
+ if (r)
+ return r;
+
+ hw_guard_start(ddata, 120);
+
+ usleep_range(5000, 10000);
+
+ return 0;
+}
+
+static int dsicm_sleep_out(struct panel_drv_data *ddata)
+{
+ int r;
+
+ hw_guard_wait(ddata);
+
+ r = mipi_dsi_dcs_exit_sleep_mode(ddata->dsi);
+ if (r)
+ return r;
+
+ hw_guard_start(ddata, 120);
+
+ usleep_range(5000, 10000);
+
+ return 0;
+}
+
+static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3)
+{
+ int r;
+
+ r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1);
+ if (r)
+ return r;
+ r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2);
+ if (r)
+ return r;
+ r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3);
+ if (r)
+ return r;
+
+ return 0;
+}
+
+static int dsicm_set_update_window(struct panel_drv_data *ddata)
+{
+ struct mipi_dsi_device *dsi = ddata->dsi;
+ int r;
+
+ r = mipi_dsi_dcs_set_column_address(dsi, 0, ddata->mode.hdisplay - 1);
+ if (r < 0)
+ return r;
+
+ r = mipi_dsi_dcs_set_page_address(dsi, 0, ddata->mode.vdisplay - 1);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int dsicm_bl_update_status(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+ int r = 0;
+ int level = backlight_get_brightness(dev);
+
+ dev_dbg(&ddata->dsi->dev, "update brightness to %d\n", level);
+
+ mutex_lock(&ddata->lock);
+
+ if (ddata->enabled)
+ r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
+ level);
+
+ mutex_unlock(&ddata->lock);
+
+ return r;
+}
+
+static int dsicm_bl_get_intensity(struct backlight_device *dev)
+{
+ return backlight_get_brightness(dev);
+}
+
+static const struct backlight_ops dsicm_bl_ops = {
+ .get_brightness = dsicm_bl_get_intensity,
+ .update_status = dsicm_bl_update_status,
+};
+
+static ssize_t num_dsi_errors_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(dev);
+ u8 errors = 0;
+ int r = -ENODEV;
+
+ mutex_lock(&ddata->lock);
+
+ if (ddata->enabled)
+ r = dsicm_dcs_read_1(ddata, MIPI_DCS_GET_ERROR_COUNT_ON_DSI, &errors);
+
+ mutex_unlock(&ddata->lock);
+
+ if (r)
+ return r;
+
+ return sysfs_emit(buf, "%d\n", errors);
+}
+
+static ssize_t hw_revision_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(dev);
+ u8 id1, id2, id3;
+ int r = -ENODEV;
+
+ mutex_lock(&ddata->lock);
+
+ if (ddata->enabled)
+ r = dsicm_get_id(ddata, &id1, &id2, &id3);
+
+ mutex_unlock(&ddata->lock);
+
+ if (r)
+ return r;
+
+ return sysfs_emit(buf, "%02x.%02x.%02x\n", id1, id2, id3);
+}
+
+static DEVICE_ATTR_RO(num_dsi_errors);
+static DEVICE_ATTR_RO(hw_revision);
+
+static struct attribute *dsicm_attrs[] = {
+ &dev_attr_num_dsi_errors.attr,
+ &dev_attr_hw_revision.attr,
+ NULL,
+};
+
+static const struct attribute_group dsicm_attr_group = {
+ .attrs = dsicm_attrs,
+};
+
+static void dsicm_hw_reset(struct panel_drv_data *ddata)
+{
+ gpiod_set_value(ddata->reset_gpio, 1);
+ udelay(10);
+ /* reset the panel */
+ gpiod_set_value(ddata->reset_gpio, 0);
+ /* assert reset */
+ udelay(10);
+ gpiod_set_value(ddata->reset_gpio, 1);
+ /* wait after releasing reset */
+ usleep_range(5000, 10000);
+}
+
+static int dsicm_power_on(struct panel_drv_data *ddata)
+{
+ u8 id1, id2, id3;
+ int r;
+
+ dsicm_hw_reset(ddata);
+
+ ddata->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ r = dsicm_sleep_out(ddata);
+ if (r)
+ goto err;
+
+ r = dsicm_get_id(ddata, &id1, &id2, &id3);
+ if (r)
+ goto err;
+
+ r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0xff);
+ if (r)
+ goto err;
+
+ r = dsicm_dcs_write_1(ddata, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+ (1<<2) | (1<<5)); /* BL | BCTRL */
+ if (r)
+ goto err;
+
+ r = mipi_dsi_dcs_set_pixel_format(ddata->dsi, MIPI_DCS_PIXEL_FMT_24BIT);
+ if (r)
+ goto err;
+
+ r = dsicm_set_update_window(ddata);
+ if (r)
+ goto err;
+
+ r = mipi_dsi_dcs_set_display_on(ddata->dsi);
+ if (r)
+ goto err;
+
+ if (ddata->panel_data->te_support) {
+ r = mipi_dsi_dcs_set_tear_on(ddata->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ if (r)
+ goto err;
+ }
+
+ /* possible panel bug */
+ msleep(100);
+
+ ddata->enabled = true;
+
+ if (!ddata->intro_printed) {
+ dev_info(&ddata->dsi->dev, "panel revision %02x.%02x.%02x\n",
+ id1, id2, id3);
+ ddata->intro_printed = true;
+ }
+
+ ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ return 0;
+err:
+ dev_err(&ddata->dsi->dev, "error while enabling panel, issuing HW reset\n");
+
+ dsicm_hw_reset(ddata);
+
+ return r;
+}
+
+static int dsicm_power_off(struct panel_drv_data *ddata)
+{
+ int r;
+
+ ddata->enabled = false;
+
+ r = mipi_dsi_dcs_set_display_off(ddata->dsi);
+ if (!r)
+ r = dsicm_sleep_in(ddata);
+
+ if (r) {
+ dev_err(&ddata->dsi->dev,
+ "error disabling panel, issuing HW reset\n");
+ dsicm_hw_reset(ddata);
+ }
+
+ return r;
+}
+
+static int dsicm_prepare(struct drm_panel *panel)
+{
+ struct panel_drv_data *ddata = panel_to_ddata(panel);
+ int r;
+
+ r = regulator_bulk_enable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
+ if (r)
+ dev_err(&ddata->dsi->dev, "failed to enable supplies: %d\n", r);
+
+ return r;
+}
+
+static int dsicm_enable(struct drm_panel *panel)
+{
+ struct panel_drv_data *ddata = panel_to_ddata(panel);
+ int r;
+
+ mutex_lock(&ddata->lock);
+
+ r = dsicm_power_on(ddata);
+ if (r)
+ goto err;
+
+ mutex_unlock(&ddata->lock);
+
+ dsicm_bl_power(ddata, true);
+
+ return 0;
+err:
+ dev_err(&ddata->dsi->dev, "enable failed (%d)\n", r);
+ mutex_unlock(&ddata->lock);
+ return r;
+}
+
+static int dsicm_unprepare(struct drm_panel *panel)
+{
+ struct panel_drv_data *ddata = panel_to_ddata(panel);
+ int r;
+
+ r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
+ if (r)
+ dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r);
+
+ return r;
+}
+
+static int dsicm_disable(struct drm_panel *panel)
+{
+ struct panel_drv_data *ddata = panel_to_ddata(panel);
+ int r;
+
+ dsicm_bl_power(ddata, false);
+
+ mutex_lock(&ddata->lock);
+
+ r = dsicm_power_off(ddata);
+
+ mutex_unlock(&ddata->lock);
+
+ return r;
+}
+
+static int dsicm_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct panel_drv_data *ddata = panel_to_ddata(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, &ddata->mode);
+ if (!mode) {
+ dev_err(&ddata->dsi->dev, "failed to add mode %ux%ux@%u kHz\n",
+ ddata->mode.hdisplay, ddata->mode.vdisplay,
+ ddata->mode.clock);
+ return -ENOMEM;
+ }
+
+ connector->display_info.width_mm = ddata->panel_data->width_mm;
+ connector->display_info.height_mm = ddata->panel_data->height_mm;
+
+ drm_mode_probed_add(connector, mode);
+
+ return 1;
+}
+
+static const struct drm_panel_funcs dsicm_panel_funcs = {
+ .unprepare = dsicm_unprepare,
+ .disable = dsicm_disable,
+ .prepare = dsicm_prepare,
+ .enable = dsicm_enable,
+ .get_modes = dsicm_get_modes,
+};
+
+static int dsicm_probe_of(struct mipi_dsi_device *dsi)
+{
+ struct backlight_device *backlight;
+ struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
+ int err;
+ struct drm_display_mode *mode = &ddata->mode;
+
+ ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ddata->reset_gpio)) {
+ err = PTR_ERR(ddata->reset_gpio);
+ dev_err(&dsi->dev, "reset gpio request failed: %d", err);
+ return err;
+ }
+
+ mode->hdisplay = mode->hsync_start = mode->hsync_end = mode->htotal =
+ ddata->panel_data->xres;
+ mode->vdisplay = mode->vsync_start = mode->vsync_end = mode->vtotal =
+ ddata->panel_data->yres;
+ mode->clock = ddata->panel_data->xres * ddata->panel_data->yres *
+ ddata->panel_data->refresh / 1000;
+ mode->width_mm = ddata->panel_data->width_mm;
+ mode->height_mm = ddata->panel_data->height_mm;
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_set_name(mode);
+
+ ddata->supplies[0].supply = "vpnl";
+ ddata->supplies[1].supply = "vddi";
+ err = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ddata->supplies),
+ ddata->supplies);
+ if (err)
+ return err;
+
+ backlight = devm_of_find_backlight(&dsi->dev);
+ if (IS_ERR(backlight))
+ return PTR_ERR(backlight);
+
+ /* If no backlight device is found assume native backlight support */
+ if (backlight)
+ ddata->extbldev = backlight;
+ else
+ ddata->use_dsi_backlight = true;
+
+ return 0;
+}
+
+static int dsicm_probe(struct mipi_dsi_device *dsi)
+{
+ struct panel_drv_data *ddata;
+ struct backlight_device *bldev = NULL;
+ struct device *dev = &dsi->dev;
+ int r;
+
+ dev_dbg(dev, "probe\n");
+
+ ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, ddata);
+ ddata->dsi = dsi;
+
+ ddata->panel_data = of_device_get_match_data(dev);
+ if (!ddata->panel_data)
+ return -ENODEV;
+
+ r = dsicm_probe_of(dsi);
+ if (r)
+ return r;
+
+ mutex_init(&ddata->lock);
+
+ dsicm_hw_reset(ddata);
+
+ drm_panel_init(&ddata->panel, dev, &dsicm_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ if (ddata->use_dsi_backlight) {
+ struct backlight_properties props = { 0 };
+ props.max_brightness = 255;
+ props.type = BACKLIGHT_RAW;
+
+ bldev = devm_backlight_device_register(dev, dev_name(dev),
+ dev, ddata, &dsicm_bl_ops, &props);
+ if (IS_ERR(bldev)) {
+ r = PTR_ERR(bldev);
+ goto err_bl;
+ }
+
+ ddata->bldev = bldev;
+ }
+
+ r = sysfs_create_group(&dev->kobj, &dsicm_attr_group);
+ if (r) {
+ dev_err(dev, "failed to create sysfs files\n");
+ goto err_bl;
+ }
+
+ dsi->lanes = 2;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_NO_EOT_PACKET;
+ dsi->hs_rate = ddata->panel_data->max_hs_rate;
+ dsi->lp_rate = ddata->panel_data->max_lp_rate;
+
+ drm_panel_add(&ddata->panel);
+
+ r = mipi_dsi_attach(dsi);
+ if (r < 0)
+ goto err_dsi_attach;
+
+ return 0;
+
+err_dsi_attach:
+ drm_panel_remove(&ddata->panel);
+ sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);
+err_bl:
+ if (ddata->extbldev)
+ put_device(&ddata->extbldev->dev);
+
+ return r;
+}
+
+static void dsicm_remove(struct mipi_dsi_device *dsi)
+{
+ struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
+
+ dev_dbg(&dsi->dev, "remove\n");
+
+ mipi_dsi_detach(dsi);
+
+ drm_panel_remove(&ddata->panel);
+
+ sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);
+
+ if (ddata->extbldev)
+ put_device(&ddata->extbldev->dev);
+}
+
+static const struct dsic_panel_data taal_data = {
+ .xres = 864,
+ .yres = 480,
+ .refresh = 60,
+ .width_mm = 0,
+ .height_mm = 0,
+ .max_hs_rate = 300000000,
+ .max_lp_rate = 10000000,
+ .te_support = true,
+};
+
+static const struct dsic_panel_data himalaya_data = {
+ .xres = 480,
+ .yres = 864,
+ .refresh = 60,
+ .width_mm = 49,
+ .height_mm = 88,
+ .max_hs_rate = 300000000,
+ .max_lp_rate = 10000000,
+ .te_support = false,
+};
+
+static const struct dsic_panel_data droid4_data = {
+ .xres = 540,
+ .yres = 960,
+ .refresh = 60,
+ .width_mm = 50,
+ .height_mm = 89,
+ .max_hs_rate = 300000000,
+ .max_lp_rate = 10000000,
+ .te_support = false,
+};
+
+static const struct of_device_id dsicm_of_match[] = {
+ { .compatible = "tpo,taal", .data = &taal_data },
+ { .compatible = "nokia,himalaya", &himalaya_data },
+ { .compatible = "motorola,droid4-panel", &droid4_data },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, dsicm_of_match);
+
+static struct mipi_dsi_driver dsicm_driver = {
+ .probe = dsicm_probe,
+ .remove = dsicm_remove,
+ .driver = {
+ .name = "panel-dsi-cm",
+ .of_match_table = dsicm_of_match,
+ },
+};
+module_mipi_dsi_driver(dsicm_driver);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver");
+MODULE_LICENSE("GPL");