// SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved. #include <linux/delay.h>#include <linux/gpio/consumer.h>#include <linux/module.h>#include <linux/of.h>#include <linux/regulator/consumer.h>#include <drm/drm_mipi_dsi.h>#include <drm/drm_modes.h>#include <drm/drm_panel.h>#include <video/mipi_display.h>static const char * const regulator_names[] = {"vddi" ,"avdd" ,"avee" ,static const unsigned long regulator_enable_loads[] = {struct panel_desc {const struct drm_display_mode *display_mode;unsigned long mode_flags;enum mipi_dsi_pixel_format format;unsigned int lanes;const char *panel_name;void (*init_sequence)(struct mipi_dsi_multi_context *ctx);struct nt36672e_panel {struct drm_panel panel;struct mipi_dsi_device *dsi;struct gpio_desc *reset_gpio;struct regulator_bulk_data supplies[3];const struct panel_desc *desc;#define NT36672E_DCS_SWITCH_PAGE 0xff#define nt36672e_switch_page(ctx, page) \static void nt36672e_enable_reload_cmds(struct mipi_dsi_multi_context *ctx)static inline struct nt36672e_panel *to_nt36672e_panel(struct drm_panel *panel)return container_of(panel, struct nt36672e_panel, panel);static void nt36672e_1080x2408_60hz_init(struct mipi_dsi_multi_context *ctx)static int nt36672e_power_on(struct nt36672e_panel *ctx)struct mipi_dsi_device *dsi = ctx->dsi;int ret;if (ret < 0) {"regulator bulk enable failed: %d\n" , ret);return ret;/* * Reset sequence of nt36672e panel requires the panel to be out of reset * for 10ms, followed by being held in reset for 10ms and then out again. return 0;static int nt36672e_power_off(struct nt36672e_panel *ctx)struct mipi_dsi_device *dsi = ctx->dsi;int ret = 0;if (ret)"regulator bulk disable failed: %d\n" , ret);return ret;static int nt36672e_on(struct nt36672e_panel *nt36672e)struct mipi_dsi_multi_context ctx = { .dsi = nt36672e->dsi };const struct panel_desc *desc = nt36672e->desc;if (desc->init_sequence)return ctx.accum_err;static int nt36672e_off(struct nt36672e_panel *panel)struct mipi_dsi_multi_context ctx = { .dsi = panel->dsi };return ctx.accum_err;static int nt36672e_panel_prepare(struct drm_panel *panel)struct nt36672e_panel *ctx = to_nt36672e_panel(panel);struct mipi_dsi_device *dsi = ctx->dsi;int ret;if (ret < 0)return ret;if (ret < 0) {if (nt36672e_power_off(ctx))"power off failed\n" );return ret;return 0;static int nt36672e_panel_unprepare(struct drm_panel *panel)struct nt36672e_panel *ctx = to_nt36672e_panel(panel);struct mipi_dsi_device *dsi = ctx->dsi;int ret;if (ret < 0)"power off failed: %d\n" , ret);return 0;static const struct drm_display_mode nt36672e_1080x2408_60hz = {"1080x2408" ,static const struct panel_desc nt36672e_panel_desc = {"nt36672e fhd plus panel" ,static int nt36672e_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector)struct nt36672e_panel *ctx = to_nt36672e_panel(panel);struct drm_display_mode *mode;if (!mode)return -ENOMEM;return 1;static const struct drm_panel_funcs nt36672e_drm_funcs = {static int nt36672e_panel_probe(struct mipi_dsi_device *dsi)struct device *dev = &dsi->dev;struct nt36672e_panel *ctx;int i, ret = 0;struct nt36672e_panel, panel,if (IS_ERR(ctx))return PTR_ERR(ctx);if (!ctx->desc) {"missing device configuration\n" );return -ENODEV;for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {if (ret < 0)return ret;"reset" , GPIOD_OUT_LOW);if (IS_ERR(ctx->reset_gpio))return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "Failed to get reset-gpios\n" );if (ret)return dev_err_probe(dev, ret, "Failed to get backlight\n" );true ;if (ret < 0) {"Failed to attach to DSI host: %d\n" , ret);goto err_dsi_attach;return 0;return ret;static void nt36672e_panel_remove(struct mipi_dsi_device *dsi)struct nt36672e_panel *ctx = mipi_dsi_get_drvdata(dsi);static const struct of_device_id nt36672e_of_match[] = {"novatek,nt36672e" ,static struct mipi_dsi_driver nt36672e_panel_driver = {"panel-novatek-nt36672e" ,"Ritesh Kumar " );"Novatek NT36672E DSI Panel Driver" );"GPL" );
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