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driver: display: add waveshare dsi panel driver support
Added waveshare dsi panel driver. It is on I2C bus. Signed-off-by: Winteri Wang <[email protected]> Signed-off-by: Jiafei Pan <[email protected]> Signed-off-by: Ruoshan Shi <[email protected]>
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‎drivers/display/CMakeLists.txt‎

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@@ -33,6 +33,7 @@ zephyr_library_sources_ifdef(CONFIG_ST7789V display_st7789v.c)
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zephyr_library_sources_ifdef(CONFIG_ST7735R display_st7735r.c)
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zephyr_library_sources_ifdef(CONFIG_ST7796S display_st7796s.c)
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zephyr_library_sources_ifdef(CONFIG_STM32_LTDC display_stm32_ltdc.c)
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zephyr_library_sources_ifdef(CONFIG_WAVESHARE_7INCH_DSI_LCD_C display_waveshare_dsi_lcd.c)
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zephyr_library_sources_ifdef(CONFIG_RM68200 display_rm68200.c)
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zephyr_library_sources_ifdef(CONFIG_RM67162 display_rm67162.c)
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zephyr_library_sources_ifdef(CONFIG_HUB12 display_hub12.c)

‎drivers/display/Kconfig‎

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@@ -62,6 +62,7 @@ source "drivers/display/Kconfig.nt35510"
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source "drivers/display/Kconfig.renesas_ra"
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source "drivers/display/Kconfig.ili9806e_dsi"
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source "drivers/display/Kconfig.st7701"
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source "drivers/display/Kconfig.waveshare_dsi_lcd"
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source "drivers/display/Kconfig.lpm013m126"
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source "drivers/display/Kconfig.co5300"
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‎drivers/display/Kconfig.waveshare_dsi_lcd‎

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# Copyright 2025 NXP
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#
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# SPDX-License-Identifier: Apache-2.0
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config WAVESHARE_7INCH_DSI_LCD_C
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bool "waveshare 7inch DSI LCD(C) driver"
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default y
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select MIPI_DSI
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select I2C
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depends on DT_HAS_WAVESHARE_7INCH_DSI_LCD_C_ENABLED
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help
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Enable driver for waveshare 7inch DSI LCD(C).

‎drivers/display/display_waveshare_dsi_lcd.c‎

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/*
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* Copyright 2025 NXP
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <zephyr/device.h>
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#include <zephyr/init.h>
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#include <zephyr/drivers/display.h>
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#include <zephyr/drivers/mipi_dsi.h>
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#include <zephyr/drivers/i2c.h>
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#include <zephyr/kernel.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(waveshare_dsi_lcd, CONFIG_DISPLAY_LOG_LEVEL);
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#if DT_HAS_COMPAT_STATUS_OKAY(waveshare_7inch_dsi_lcd_c)
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#define DT_DRV_COMPAT waveshare_7inch_dsi_lcd_c
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#endif
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struct waveshare_dsi_lcd_bus {
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struct i2c_dt_spec i2c;
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};
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typedef bool (*waveshare_dsi_lcd_bus_ready_fn)(const struct device *dev);
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typedef int (*waveshare_dsi_lcd_write_bus_fn)(const struct device *dev, uint8_t reg, uint8_t val);
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typedef const char *(*waveshare_dsi_lcd_bus_name_fn)(const struct device *dev);
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struct waveshare_dsi_lcd_config {
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const struct device *mipi_dsi;
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uint8_t channel;
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uint8_t num_of_lanes;
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struct waveshare_dsi_lcd_bus bus;
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waveshare_dsi_lcd_bus_ready_fn bus_ready;
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waveshare_dsi_lcd_write_bus_fn write_bus;
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waveshare_dsi_lcd_bus_name_fn bus_name;
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};
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struct waveshare_dsi_lcd_data {
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uint8_t pixel_format;
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};
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static bool waveshare_dsi_lcd_bus_ready_i2c(const struct device *dev)
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{
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const struct waveshare_dsi_lcd_config *config = dev->config;
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return i2c_is_ready_dt(&config->bus.i2c);
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}
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static int waveshare_dsi_lcd_write_bus_i2c(const struct device *dev, uint8_t reg, uint8_t val)
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{
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const struct waveshare_dsi_lcd_config *config = dev->config;
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uint8_t buf[2];
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buf[0] = reg;
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buf[1] = val;
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return i2c_write_dt(&config->bus.i2c, buf, 2);
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}
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static const char *waveshare_dsi_lcd_bus_name_i2c(const struct device *dev)
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{
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const struct waveshare_dsi_lcd_config *config = dev->config;
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return config->bus.i2c.bus->name;
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}
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static int waveshare_dsi_lcd_enable(const struct device *dev, bool enable)
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{
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const struct waveshare_dsi_lcd_config *config = dev->config;
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config->write_bus(dev, 0xad, enable ? 0x01 : 0x00);
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return 0;
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}
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static int waveshare_dsi_lcd_bl_update_status(const struct device *dev, uint8_t brightness)
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{
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const struct waveshare_dsi_lcd_config *config = dev->config;
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config->write_bus(dev, 0xab, 0xff - brightness);
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config->write_bus(dev, 0xaa, 0x01);
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return 0;
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}
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static int waveshare_dsi_lcd_init(const struct device *dev)
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{
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const struct waveshare_dsi_lcd_config *config = dev->config;
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struct waveshare_dsi_lcd_data *data = dev->data;
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int ret;
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struct mipi_dsi_device mdev = {0};
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if (!config->bus_ready(dev)) {
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LOG_ERR("Bus device %s not ready!", config->bus_name(dev));
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return -EINVAL;
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}
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config->write_bus(dev, 0xc0, 0x01);
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config->write_bus(dev, 0xc2, 0x01);
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config->write_bus(dev, 0xac, 0x01);
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waveshare_dsi_lcd_bl_update_status(dev, 0xff);
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waveshare_dsi_lcd_enable(dev, true);
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/* Attach to MIPI DSI host */
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mdev.data_lanes = config->num_of_lanes;
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mdev.pixfmt = data->pixel_format;
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mdev.mode_flags =
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MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS;
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ret = mipi_dsi_attach(config->mipi_dsi, config->channel, &mdev);
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if (ret < 0) {
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LOG_ERR("Could not attach to MIPI-DSI host");
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return ret;
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}
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LOG_INF("waveshare_dsi_lcd init succeeded");
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return 0;
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}
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#define WAVESHARE_DSI_LCD_DEFINE(id) \
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static const struct waveshare_dsi_lcd_config config_##id = { \
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.mipi_dsi = DEVICE_DT_GET(DT_INST_PHANDLE(id, mipi_dsi)), \
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.channel = DT_INST_REG_ADDR(id), \
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.num_of_lanes = DT_INST_PROP_BY_IDX(id, data_lanes, 0), \
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.bus = {.i2c = I2C_DT_SPEC_INST_GET(id)}, \
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.bus_ready = waveshare_dsi_lcd_bus_ready_i2c, \
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.write_bus = waveshare_dsi_lcd_write_bus_i2c, \
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.bus_name = waveshare_dsi_lcd_bus_name_i2c, \
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}; \
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static struct waveshare_dsi_lcd_data data_##id = { \
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.pixel_format = DT_INST_PROP(id, pixel_format), \
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}; \
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DEVICE_DT_INST_DEFINE(id, waveshare_dsi_lcd_init, NULL, &data_##id, &config_##id, \
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POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY, NULL);
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DT_INST_FOREACH_STATUS_OKAY(WAVESHARE_DSI_LCD_DEFINE)

‎dts/bindings/display/waveshare,7inch-dsi-lcd-c.yaml‎

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#
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# Copyright 2025 NXP
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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description: Waveshare 7INCH DSI LCD(C)
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compatible: "waveshare,7inch-dsi-lcd-c"
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include: base.yaml
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properties:
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reg:
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required: true
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data-lanes:
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type: array
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required: true
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description:
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Number of data lanes.
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pixel-format:
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type: int
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required: true
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description:
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Pixel format. Available formats in dt-bindings/mipi_dsi/mipi_dsi.h.
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mipi-dsi:
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type: phandle
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required: true
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description:
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Instance of the MIPI DSI peripheral.

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