drivers: display: Add display_clear function (1a55ecfb) · Commits · Wenxi XU / zephyr

include/zephyr/drivers/display.h

+28 −0

Original line number	Diff line number	Diff line
		@@ -168,6 +168,13 @@ typedef int (display_read_api)(const struct device dev, const uint16_t x,
		const struct display_buffer_descriptor *desc,
		void *buf);

		/**
		* @typedef display_clear
		* @brief Callback API for clearing the screen of the display
		* See display_clear() for argument description
		*/
		typedef int (display_clear_api)(const struct device dev);

		/**
		* @typedef display_get_framebuffer_api
		* @brief Callback API to get framebuffer pointer
		@@ -227,6 +234,7 @@ __subsystem struct display_driver_api {
		display_blanking_off_api blanking_off;
		display_write_api write;
		display_read_api read;
		display_clear_api clear;
		display_get_framebuffer_api get_framebuffer;
		display_set_brightness_api set_brightness;
		display_set_contrast_api set_contrast;
		@@ -284,6 +292,26 @@ static inline int display_read(const struct device *dev, const uint16_t x,
		return api->read(dev, x, y, desc, buf);
		}

		/**
		* @brief Clear the screen of the display device
		*
		* @param dev Pointer to device structure
		*
		* @retval 0 on success else negative errno code.
		* @retval -ENOSYS if not implemented.
		*/
		static inline int display_clear(const struct device *dev)
		{
		struct display_driver_api *api =
		(struct display_driver_api *)dev->api;

		if (api->clear == NULL) {
		return -ENOSYS;
		}

		return api->clear(dev);
		}

		/**
		* @brief Get pointer to framebuffer for direct access
		*