135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*
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* Copyright (c) 2018 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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* Copyright (c) 2021 Nordic Semiconductor
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT zephyr_dummy_dc
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#include <errno.h>
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#include <string.h>
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#include <zephyr/drivers/display.h>
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#include <zephyr/device.h>
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struct dummy_display_config {
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uint16_t height;
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uint16_t width;
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};
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struct dummy_display_data {
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enum display_pixel_format current_pixel_format;
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};
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static int dummy_display_init(const struct device *dev)
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{
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struct dummy_display_data *disp_data = dev->data;
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disp_data->current_pixel_format = PIXEL_FORMAT_ARGB_8888;
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return 0;
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}
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static int dummy_display_write(const struct device *dev, const uint16_t x,
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const uint16_t y,
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const struct display_buffer_descriptor *desc,
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const void *buf)
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{
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const struct dummy_display_config *config = dev->config;
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__ASSERT(desc->width <= desc->pitch, "Pitch is smaller then width");
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__ASSERT(desc->pitch <= config->width,
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"Pitch in descriptor is larger than screen size");
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__ASSERT(desc->height <= config->height,
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"Height in descriptor is larger than screen size");
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__ASSERT(x + desc->pitch <= config->width,
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"Writing outside screen boundaries in horizontal direction");
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__ASSERT(y + desc->height <= config->height,
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"Writing outside screen boundaries in vertical direction");
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if (desc->width > desc->pitch ||
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x + desc->pitch > config->width ||
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y + desc->height > config->height) {
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return -EINVAL;
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}
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return 0;
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}
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static int dummy_display_blanking_off(const struct device *dev)
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{
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return 0;
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}
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static int dummy_display_blanking_on(const struct device *dev)
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{
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return 0;
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}
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static int dummy_display_set_brightness(const struct device *dev,
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const uint8_t brightness)
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{
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return 0;
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}
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static int dummy_display_set_contrast(const struct device *dev,
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const uint8_t contrast)
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{
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return 0;
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}
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static void dummy_display_get_capabilities(const struct device *dev,
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struct display_capabilities *capabilities)
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{
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const struct dummy_display_config *config = dev->config;
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struct dummy_display_data *disp_data = dev->data;
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memset(capabilities, 0, sizeof(struct display_capabilities));
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capabilities->x_resolution = config->width;
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capabilities->y_resolution = config->height;
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capabilities->supported_pixel_formats = PIXEL_FORMAT_ARGB_8888 |
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PIXEL_FORMAT_RGB_888 |
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PIXEL_FORMAT_MONO01 |
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PIXEL_FORMAT_MONO10;
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capabilities->current_pixel_format = disp_data->current_pixel_format;
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capabilities->screen_info = SCREEN_INFO_MONO_VTILED |
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SCREEN_INFO_MONO_MSB_FIRST;
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}
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static int dummy_display_set_pixel_format(const struct device *dev,
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const enum display_pixel_format pixel_format)
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{
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struct dummy_display_data *disp_data = dev->data;
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disp_data->current_pixel_format = pixel_format;
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return 0;
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}
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static const struct display_driver_api dummy_display_api = {
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.blanking_on = dummy_display_blanking_on,
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.blanking_off = dummy_display_blanking_off,
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.write = dummy_display_write,
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.set_brightness = dummy_display_set_brightness,
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.set_contrast = dummy_display_set_contrast,
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.get_capabilities = dummy_display_get_capabilities,
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.set_pixel_format = dummy_display_set_pixel_format,
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};
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#define DISPLAY_DUMMY_DEFINE(n) \
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static const struct dummy_display_config dd_config_##n = { \
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.height = DT_INST_PROP(n, height), \
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.width = DT_INST_PROP(n, width), \
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}; \
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\
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static struct dummy_display_data dd_data_##n; \
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\
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DEVICE_DT_INST_DEFINE(n, &dummy_display_init, NULL, \
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&dd_data_##n, \
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&dd_config_##n, \
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POST_KERNEL, \
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CONFIG_DISPLAY_INIT_PRIORITY, \
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&dummy_display_api); \
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DT_INST_FOREACH_STATUS_OKAY(DISPLAY_DUMMY_DEFINE)
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