1 /*
2 * Copyright (c) 2018 Jan Van Winkel <jan.van_winkel@dxplore.eu>
3 * Copyright (c) 2021 Nordic Semiconductor
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 */
7
8 #define DT_DRV_COMPAT zephyr_dummy_dc
9
10 #include <errno.h>
11 #include <string.h>
12
13 #include <zephyr/drivers/display.h>
14 #include <zephyr/device.h>
15
16 struct dummy_display_config {
17 uint16_t height;
18 uint16_t width;
19 };
20
21 struct dummy_display_data {
22 enum display_pixel_format current_pixel_format;
23 };
24
dummy_display_init(const struct device * dev)25 static int dummy_display_init(const struct device *dev)
26 {
27 struct dummy_display_data *disp_data = dev->data;
28
29 disp_data->current_pixel_format = PIXEL_FORMAT_ARGB_8888;
30
31 return 0;
32 }
33
dummy_display_write(const struct device * dev,const uint16_t x,const uint16_t y,const struct display_buffer_descriptor * desc,const void * buf)34 static int dummy_display_write(const struct device *dev, const uint16_t x,
35 const uint16_t y,
36 const struct display_buffer_descriptor *desc,
37 const void *buf)
38 {
39 const struct dummy_display_config *config = dev->config;
40
41 __ASSERT(desc->width <= desc->pitch, "Pitch is smaller than width");
42 __ASSERT(desc->pitch <= config->width,
43 "Pitch in descriptor is larger than screen size");
44 __ASSERT(desc->height <= config->height,
45 "Height in descriptor is larger than screen size");
46 __ASSERT(x + desc->pitch <= config->width,
47 "Writing outside screen boundaries in horizontal direction");
48 __ASSERT(y + desc->height <= config->height,
49 "Writing outside screen boundaries in vertical direction");
50
51 if (desc->width > desc->pitch ||
52 x + desc->pitch > config->width ||
53 y + desc->height > config->height) {
54 return -EINVAL;
55 }
56
57 return 0;
58 }
59
dummy_display_blanking_off(const struct device * dev)60 static int dummy_display_blanking_off(const struct device *dev)
61 {
62 return 0;
63 }
64
dummy_display_blanking_on(const struct device * dev)65 static int dummy_display_blanking_on(const struct device *dev)
66 {
67 return 0;
68 }
69
dummy_display_set_brightness(const struct device * dev,const uint8_t brightness)70 static int dummy_display_set_brightness(const struct device *dev,
71 const uint8_t brightness)
72 {
73 return 0;
74 }
75
dummy_display_set_contrast(const struct device * dev,const uint8_t contrast)76 static int dummy_display_set_contrast(const struct device *dev,
77 const uint8_t contrast)
78 {
79 return 0;
80 }
81
dummy_display_get_capabilities(const struct device * dev,struct display_capabilities * capabilities)82 static void dummy_display_get_capabilities(const struct device *dev,
83 struct display_capabilities *capabilities)
84 {
85 const struct dummy_display_config *config = dev->config;
86 struct dummy_display_data *disp_data = dev->data;
87
88 memset(capabilities, 0, sizeof(struct display_capabilities));
89 capabilities->x_resolution = config->width;
90 capabilities->y_resolution = config->height;
91 capabilities->supported_pixel_formats = PIXEL_FORMAT_ARGB_8888 |
92 PIXEL_FORMAT_RGB_888 |
93 PIXEL_FORMAT_MONO01 |
94 PIXEL_FORMAT_MONO10;
95 capabilities->current_pixel_format = disp_data->current_pixel_format;
96 capabilities->screen_info = SCREEN_INFO_MONO_VTILED |
97 SCREEN_INFO_MONO_MSB_FIRST;
98 }
99
dummy_display_set_pixel_format(const struct device * dev,const enum display_pixel_format pixel_format)100 static int dummy_display_set_pixel_format(const struct device *dev,
101 const enum display_pixel_format pixel_format)
102 {
103 struct dummy_display_data *disp_data = dev->data;
104
105 disp_data->current_pixel_format = pixel_format;
106 return 0;
107 }
108
109 static DEVICE_API(display, dummy_display_api) = {
110 .blanking_on = dummy_display_blanking_on,
111 .blanking_off = dummy_display_blanking_off,
112 .write = dummy_display_write,
113 .set_brightness = dummy_display_set_brightness,
114 .set_contrast = dummy_display_set_contrast,
115 .get_capabilities = dummy_display_get_capabilities,
116 .set_pixel_format = dummy_display_set_pixel_format,
117 };
118
119 #define DISPLAY_DUMMY_DEFINE(n) \
120 static const struct dummy_display_config dd_config_##n = { \
121 .height = DT_INST_PROP(n, height), \
122 .width = DT_INST_PROP(n, width), \
123 }; \
124 \
125 static struct dummy_display_data dd_data_##n; \
126 \
127 DEVICE_DT_INST_DEFINE(n, &dummy_display_init, NULL, \
128 &dd_data_##n, \
129 &dd_config_##n, \
130 POST_KERNEL, \
131 CONFIG_DISPLAY_INIT_PRIORITY, \
132 &dummy_display_api); \
133
134 DT_INST_FOREACH_STATUS_OKAY(DISPLAY_DUMMY_DEFINE)
135
