1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/*
* Copyright 2019-2021, 2023 NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_fbdev.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/*******************************************************************************
* Prototypes
******************************************************************************/
static void FBDEV_BufferSwitchOffCallback(void *param, void *switchOffBuffer);
/*******************************************************************************
* Variables
******************************************************************************/
/*******************************************************************************
* Code
******************************************************************************/
status_t FBDEV_Open(fbdev_t *fbdev, const dc_fb_t *dc, uint8_t layer)
{
status_t status;
assert(NULL != fbdev);
(void)memset(fbdev, 0, sizeof(fbdev_t));
fbdev->dc = dc;
(void)VIDEO_STACK_Init(&fbdev->fbManager, fbdev->buffers, FBDEV_MAX_FRAME_BUFFER);
/* Initialize the display controller. */
status = dc->ops->init(dc);
if (kStatus_Success != status)
{
return status;
}
fbdev->layer = layer;
/* Initializes the dc_fb_info_t to the display controller default setting. */
status = dc->ops->getLayerDefaultConfig(dc, layer, &fbdev->fbInfo.bufInfo);
if (kStatus_Success != status)
{
return status;
}
fbdev->semaFramePending = rt_sem_create("fsfp", 0, RT_IPC_FLAG_PRIO);
if (NULL == fbdev->semaFramePending)
{
return kStatus_Fail;
}
/* No frame pending. */
(void)rt_sem_release(fbdev->semaFramePending);
dc->ops->setCallback(dc, layer, FBDEV_BufferSwitchOffCallback, (void *)fbdev);
return kStatus_Success;
}
status_t FBDEV_Close(fbdev_t *fbdev)
{
const dc_fb_t *dc = fbdev->dc;
(void)dc->ops->deinit(dc);
if (NULL != fbdev->semaFbManager)
{
rt_sem_delete(fbdev->semaFbManager);
fbdev->semaFbManager = NULL;
}
if (NULL != fbdev->semaFramePending)
{
rt_sem_delete(fbdev->semaFramePending);
fbdev->semaFramePending = NULL;
}
return kStatus_Success;
}
status_t FBDEV_Enable(fbdev_t *fbdev)
{
status_t status = kStatus_Success;
const dc_fb_t *dc = fbdev->dc;
if (!fbdev->enabled)
{
/* Wait for frame buffer sent to display controller video memory. */
if ((dc->ops->getProperty(dc) & (uint32_t)kDC_FB_ReserveFrameBuffer) == 0U)
{
if (RT_EOK != rt_sem_take(fbdev->semaFramePending, RT_WAITING_FOREVER))
{
status = kStatus_Fail;
}
}
if (kStatus_Success == status)
{
/* No frame is pending. */
(void)rt_sem_release(fbdev->semaFramePending);
status = dc->ops->enableLayer(dc, fbdev->layer);
if (kStatus_Success == status)
{
fbdev->enabled = true;
}
}
}
return status;
}
status_t FBDEV_Disable(fbdev_t *fbdev)
{
status_t status = kStatus_Success;
const dc_fb_t *dc = fbdev->dc;
if (!fbdev->enabled)
{
/* Wait until no frame pending. */
if (RT_EOK != rt_sem_take(fbdev->semaFramePending, RT_WAITING_FOREVER))
{
status = kStatus_Fail;
}
if (kStatus_Success == status)
{
(void)rt_sem_release(fbdev->semaFramePending);
(void)dc->ops->disableLayer(dc, fbdev->layer);
fbdev->enabled = false;
}
}
return status;
}
void FBDEV_GetFrameBufferInfo(fbdev_t *fbdev, fbdev_fb_info_t *info)
{
*info = fbdev->fbInfo;
}
status_t FBDEV_SetFrameBufferInfo(fbdev_t *fbdev, fbdev_fb_info_t *info)
{
status_t status;
const dc_fb_t *dc = fbdev->dc;
/* Should only change the frame buffer setting before enabling the fbdev. */
if (fbdev->enabled)
{
return kStatus_Fail;
}
fbdev->fbInfo = *info;
status = dc->ops->setLayerConfig(dc, fbdev->layer, &fbdev->fbInfo.bufInfo);
if (kStatus_Success != status)
{
return status;
}
fbdev->semaFbManager = rt_sem_create("fsfm", 0, RT_IPC_FLAG_PRIO);
if (NULL == fbdev->semaFbManager)
{
return kStatus_Fail;
}
for (uint8_t i = 0; i < info->bufferCount; i++)
{
/* Don't need to disable interrupt for the FB stack operation, because
the fbdev is not working, this is the only function to access FB stack.
*/
(void)VIDEO_STACK_Push(&fbdev->fbManager, info->buffers[i]);
(void)rt_sem_release(fbdev->semaFbManager);
}
return kStatus_Success;
}
void *FBDEV_GetFrameBuffer(fbdev_t *fbdev, uint32_t flags)
{
rt_uint32_t tick;
void *fb;
tick = ((flags & (uint32_t)kFBDEV_NoWait) != 0U) ? 0U : RT_WAITING_FOREVER;
if (RT_EOK == rt_sem_take(fbdev->semaFbManager, tick))
{
/* Disable interrupt to protect the FB stack. */
rt_enter_critical();
(void)VIDEO_STACK_Pop(&fbdev->fbManager, &fb);
rt_exit_critical();
}
else
{
fb = NULL;
}
return fb;
}
status_t FBDEV_SetFrameBuffer(fbdev_t *fbdev, void *frameBuffer, uint32_t flags)
{
rt_uint32_t tick;
const dc_fb_t *dc = fbdev->dc;
tick = ((flags & (uint32_t)kFBDEV_NoWait) != 0U) ? 0U : RT_WAITING_FOREVER;
if (RT_EOK == rt_sem_take(fbdev->semaFramePending, tick))
{
return dc->ops->setFrameBuffer(dc, fbdev->layer, frameBuffer);
}
else
{
return kStatus_Fail;
}
}
static void FBDEV_BufferSwitchOffCallback(void *param, void *switchOffBuffer)
{
fbdev_t *fbdev = (fbdev_t *)param;
/* This function should only be called in ISR, so don't need to protect the FB stack */
(void)VIDEO_STACK_Push(&fbdev->fbManager, switchOffBuffer);
rt_sem_release(fbdev->semaFbManager);
rt_sem_release(fbdev->semaFramePending);
}
|
