--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+
+struct visionox_rm69299 {
+ struct drm_panel panel;
+ struct regulator_bulk_data supplies[2];
+ struct gpio_desc *reset_gpio;
+ struct mipi_dsi_device *dsi;
+ bool prepared;
+ bool enabled;
+};
+
+static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
+{
+ return container_of(panel, struct visionox_rm69299, panel);
+}
+
+static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Reset sequence of visionox panel requires the panel to be
+ * out of reset for 10ms, followed by being held in reset
+ * for 10ms and then out again
+ */
+ gpiod_set_value(ctx->reset_gpio, 1);
+ usleep_range(10000, 20000);
+ gpiod_set_value(ctx->reset_gpio, 0);
+ usleep_range(10000, 20000);
+ gpiod_set_value(ctx->reset_gpio, 1);
+ usleep_range(10000, 20000);
+
+ return 0;
+}
+
+static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
+{
+ gpiod_set_value(ctx->reset_gpio, 0);
+
+ return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static int visionox_rm69299_unprepare(struct drm_panel *panel)
+{
+ struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+ int ret;
+
+ ctx->dsi->mode_flags = 0;
+
+ ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
+ if (ret < 0)
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "set_display_off cmd failed ret = %d\n", ret);
+
+ /* 120ms delay required here as per DCS spec */
+ msleep(120);
+
+ ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "enter_sleep cmd failed ret = %d\n", ret);
+ }
+
+ ret = visionox_rm69299_power_off(ctx);
+
+ ctx->prepared = false;
+ return ret;
+}
+
+static int visionox_rm69299_prepare(struct drm_panel *panel)
+{
+ struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+ int ret;
+
+ if (ctx->prepared)
+ return 0;
+
+ ret = visionox_rm69299_power_on(ctx);
+ if (ret < 0)
+ return ret;
+
+ ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "cmd set tx 0 failed, ret = %d\n", ret);
+ goto power_off;
+ }
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "cmd set tx 1 failed, ret = %d\n", ret);
+ goto power_off;
+ }
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "cmd set tx 2 failed, ret = %d\n", ret);
+ goto power_off;
+ }
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "cmd set tx 3 failed, ret = %d\n", ret);
+ goto power_off;
+ }
+
+ ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "exit_sleep_mode cmd failed ret = %d\n", ret);
+ goto power_off;
+ }
+
+ /* Per DSI spec wait 120ms after sending exit sleep DCS command */
+ msleep(120);
+
+ ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
+ if (ret < 0) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "set_display_on cmd failed ret = %d\n", ret);
+ goto power_off;
+ }
+
+ /* Per DSI spec wait 120ms after sending set_display_on DCS command */
+ msleep(120);
+
+ ctx->prepared = true;
+
+ return 0;
+
+power_off:
+ return ret;
+}
+
+static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
+ .name = "1080x2248",
+ .clock = 158695,
+ .hdisplay = 1080,
+ .hsync_start = 1080 + 26,
+ .hsync_end = 1080 + 26 + 2,
+ .htotal = 1080 + 26 + 2 + 36,
+ .vdisplay = 2248,
+ .vsync_start = 2248 + 56,
+ .vsync_end = 2248 + 56 + 4,
+ .vtotal = 2248 + 56 + 4 + 4,
+ .vrefresh = 60,
+ .flags = 0,
+};
+
+static int visionox_rm69299_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct visionox_rm69299 *ctx = panel_to_ctx(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_create(connector->dev);
+ if (!mode) {
+ DRM_DEV_ERROR(ctx->panel.dev,
+ "failed to create a new display mode\n");
+ return 0;
+ }
+
+ connector->display_info.width_mm = 74;
+ connector->display_info.height_mm = 131;
+ drm_mode_copy(mode, &visionox_rm69299_1080x2248_60hz);
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ return 1;
+}
+
+static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
+ .unprepare = visionox_rm69299_unprepare,
+ .prepare = visionox_rm69299_prepare,
+ .get_modes = visionox_rm69299_get_modes,
+};
+
+static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct visionox_rm69299 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ ctx->panel.dev = dev;
+ ctx->dsi = dsi;
+
+ ctx->supplies[0].supply = "vdda";
+ ctx->supplies[1].supply = "vdd3p3";
+
+ ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
+ ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
+ "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->reset_gpio)) {
+ DRM_DEV_ERROR(dev, "cannot get reset gpio %ld\n",
+ PTR_ERR(ctx->reset_gpio));
+ return PTR_ERR(ctx->reset_gpio);
+ }
+
+ drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ ctx->panel.dev = dev;
+ ctx->panel.funcs = &visionox_rm69299_drm_funcs;
+ drm_panel_add(&ctx->panel);
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS;
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "dsi attach failed ret = %d\n", ret);
+ goto err_dsi_attach;
+ }
+
+ ret = regulator_set_load(ctx->supplies[0].consumer, 32000);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "regulator set load failed for vdda supply ret = %d\n",
+ ret);
+ goto err_set_load;
+ }
+
+ ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "regulator set load failed for vdd3p3 supply ret = %d\n",
+ ret);
+ goto err_set_load;
+ }
+
+ return 0;
+
+err_set_load:
+ mipi_dsi_detach(dsi);
+err_dsi_attach:
+ drm_panel_remove(&ctx->panel);
+ return ret;
+}
+
+static int visionox_rm69299_remove(struct mipi_dsi_device *dsi)
+{
+ struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(ctx->dsi);
+ mipi_dsi_device_unregister(ctx->dsi);
+
+ drm_panel_remove(&ctx->panel);
+ return 0;
+}
+
+static const struct of_device_id visionox_rm69299_of_match[] = {
+ { .compatible = "visionox,rm69299-1080p-display", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
+
+static struct mipi_dsi_driver visionox_rm69299_driver = {
+ .driver = {
+ .name = "panel-visionox-rm69299",
+ .of_match_table = visionox_rm69299_of_match,
+ },
+ .probe = visionox_rm69299_probe,
+ .remove = visionox_rm69299_remove,
+};
+module_mipi_dsi_driver(visionox_rm69299_driver);
+
+MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
projects / platform / kernel / linux-starfive.git / commitdiff