--- /dev/null
+/*
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/backlight.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+struct innolux_panel {
+ struct drm_panel base;
+ struct mipi_dsi_device *link;
+
+ struct backlight_device *backlight;
+ struct regulator *supply;
+ struct gpio_desc *enable_gpio;
+
+ bool prepared;
+ bool enabled;
+};
+
+static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct innolux_panel, base);
+}
+
+static int innolux_panel_disable(struct drm_panel *panel)
+{
+ struct innolux_panel *innolux = to_innolux_panel(panel);
+ int err;
+
+ if (!innolux->enabled)
+ return 0;
+
+ innolux->backlight->props.power = FB_BLANK_POWERDOWN;
+ backlight_update_status(innolux->backlight);
+
+ err = mipi_dsi_dcs_set_display_off(innolux->link);
+ if (err < 0)
+ DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
+ err);
+
+ innolux->enabled = false;
+
+ return 0;
+}
+
+static int innolux_panel_unprepare(struct drm_panel *panel)
+{
+ struct innolux_panel *innolux = to_innolux_panel(panel);
+ int err;
+
+ if (!innolux->prepared)
+ return 0;
+
+ err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
+ if (err < 0) {
+ DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
+ err);
+ return err;
+ }
+
+ gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+
+ /* T8: 80ms - 1000ms */
+ msleep(80);
+
+ err = regulator_disable(innolux->supply);
+ if (err < 0)
+ return err;
+
+ innolux->prepared = false;
+
+ return 0;
+}
+
+static int innolux_panel_prepare(struct drm_panel *panel)
+{
+ struct innolux_panel *innolux = to_innolux_panel(panel);
+ int err, regulator_err;
+
+ if (innolux->prepared)
+ return 0;
+
+ gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+
+ err = regulator_enable(innolux->supply);
+ if (err < 0)
+ return err;
+
+ /* T2: 15ms - 1000ms */
+ usleep_range(15000, 16000);
+
+ gpiod_set_value_cansleep(innolux->enable_gpio, 1);
+
+ /* T4: 15ms - 1000ms */
+ usleep_range(15000, 16000);
+
+ err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
+ if (err < 0) {
+ DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
+ err);
+ goto poweroff;
+ }
+
+ /* T6: 120ms - 1000ms*/
+ msleep(120);
+
+ err = mipi_dsi_dcs_set_display_on(innolux->link);
+ if (err < 0) {
+ DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
+ err);
+ goto poweroff;
+ }
+
+ /* T7: 5ms */
+ usleep_range(5000, 6000);
+
+ innolux->prepared = true;
+
+ return 0;
+
+poweroff:
+ regulator_err = regulator_disable(innolux->supply);
+ if (regulator_err)
+ DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
+ regulator_err);
+
+ gpiod_set_value_cansleep(innolux->enable_gpio, 0);
+ return err;
+}
+
+static int innolux_panel_enable(struct drm_panel *panel)
+{
+ struct innolux_panel *innolux = to_innolux_panel(panel);
+ int ret;
+
+ if (innolux->enabled)
+ return 0;
+
+ innolux->backlight->props.power = FB_BLANK_UNBLANK;
+ ret = backlight_update_status(innolux->backlight);
+ if (ret) {
+ DRM_DEV_ERROR(panel->drm->dev,
+ "Failed to enable backlight %d\n", ret);
+ return ret;
+ }
+
+ innolux->enabled = true;
+
+ return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+ .clock = 56900,
+ .hdisplay = 768,
+ .hsync_start = 768 + 40,
+ .hsync_end = 768 + 40 + 40,
+ .htotal = 768 + 40 + 40 + 40,
+ .vdisplay = 1024,
+ .vsync_start = 1024 + 20,
+ .vsync_end = 1024 + 20 + 4,
+ .vtotal = 1024 + 20 + 4 + 20,
+ .vrefresh = 60,
+};
+
+static int innolux_panel_get_modes(struct drm_panel *panel)
+{
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(panel->drm, &default_mode);
+ if (!mode) {
+ DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
+ default_mode.hdisplay, default_mode.vdisplay,
+ default_mode.vrefresh);
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ drm_mode_probed_add(panel->connector, mode);
+
+ panel->connector->display_info.width_mm = 120;
+ panel->connector->display_info.height_mm = 160;
+ panel->connector->display_info.bpc = 8;
+
+ return 1;
+}
+
+static const struct drm_panel_funcs innolux_panel_funcs = {
+ .disable = innolux_panel_disable,
+ .unprepare = innolux_panel_unprepare,
+ .prepare = innolux_panel_prepare,
+ .enable = innolux_panel_enable,
+ .get_modes = innolux_panel_get_modes,
+};
+
+static const struct of_device_id innolux_of_match[] = {
+ { .compatible = "innolux,p079zca", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, innolux_of_match);
+
+static int innolux_panel_add(struct innolux_panel *innolux)
+{
+ struct device *dev = &innolux->link->dev;
+ struct device_node *np;
+ int err;
+
+ innolux->supply = devm_regulator_get(dev, "power");
+ if (IS_ERR(innolux->supply))
+ return PTR_ERR(innolux->supply);
+
+ innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(innolux->enable_gpio)) {
+ err = PTR_ERR(innolux->enable_gpio);
+ dev_dbg(dev, "failed to get enable gpio: %d\n", err);
+ innolux->enable_gpio = NULL;
+ }
+
+ np = of_parse_phandle(dev->of_node, "backlight", 0);
+ if (np) {
+ innolux->backlight = of_find_backlight_by_node(np);
+ of_node_put(np);
+
+ if (!innolux->backlight)
+ return -EPROBE_DEFER;
+ }
+
+ drm_panel_init(&innolux->base);
+ innolux->base.funcs = &innolux_panel_funcs;
+ innolux->base.dev = &innolux->link->dev;
+
+ err = drm_panel_add(&innolux->base);
+ if (err < 0)
+ goto put_backlight;
+
+ return 0;
+
+put_backlight:
+ put_device(&innolux->backlight->dev);
+
+ return err;
+}
+
+static void innolux_panel_del(struct innolux_panel *innolux)
+{
+ if (innolux->base.dev)
+ drm_panel_remove(&innolux->base);
+
+ put_device(&innolux->backlight->dev);
+}
+
+static int innolux_panel_probe(struct mipi_dsi_device *dsi)
+{
+ struct innolux_panel *innolux;
+ int err;
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_LPM;
+
+ innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL);
+ if (!innolux)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, innolux);
+
+ innolux->link = dsi;
+
+ err = innolux_panel_add(innolux);
+ if (err < 0)
+ return err;
+
+ err = mipi_dsi_attach(dsi);
+ return err;
+}
+
+static int innolux_panel_remove(struct mipi_dsi_device *dsi)
+{
+ struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
+ int err;
+
+ err = innolux_panel_unprepare(&innolux->base);
+ if (err < 0)
+ DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
+ err);
+
+ err = innolux_panel_disable(&innolux->base);
+ if (err < 0)
+ DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
+
+ err = mipi_dsi_detach(dsi);
+ if (err < 0)
+ DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
+ err);
+
+ drm_panel_detach(&innolux->base);
+ innolux_panel_del(innolux);
+
+ return 0;
+}
+
+static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+ struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
+
+ innolux_panel_unprepare(&innolux->base);
+ innolux_panel_disable(&innolux->base);
+}
+
+static struct mipi_dsi_driver innolux_panel_driver = {
+ .driver = {
+ .name = "panel-innolux-p079zca",
+ .of_match_table = innolux_of_match,
+ },
+ .probe = innolux_panel_probe,
+ .remove = innolux_panel_remove,
+ .shutdown = innolux_panel_shutdown,
+};
+module_mipi_dsi_driver(innolux_panel_driver);
+
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
+MODULE_LICENSE("GPL v2");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff