1 /*
2 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification, are permitted
5 * provided that the following conditions are met:
6 * * Redistributions of source code must retain the above copyright notice, this list of
7 * conditions and the following disclaimer.
8 * * Redistributions in binary form must reproduce the above copyright notice, this list of
9 * conditions and the following disclaimer in the documentation and/or other materials provided
10 * with the distribution.
11 * * Neither the name of The Linux Foundation nor the names of its contributors may be used to
12 * endorse or promote products derived from this software without specific prior written
13 * permission.
14 *
15 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
21 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include <hardware/hwcomposer_defs.h>
26 #include <utils/constants.h>
27 #include <utils/debug.h>
28 #include "hwc_display_null.h"
29
30 #define __CLASS__ "HWCDisplayNull"
31
32 namespace sdm {
33
Create(CoreInterface * core_intf,hwc_procs_t const ** hwc_procs,HWCDisplay ** hwc_display)34 int HWCDisplayNull::Create(CoreInterface *core_intf, hwc_procs_t const **hwc_procs,
35 HWCDisplay **hwc_display) {
36 int status;
37
38 DLOGI("Null display is being created");
39 HWCDisplayNull *hwc_display_null = new HWCDisplayNull(core_intf, hwc_procs);
40
41 status = hwc_display_null->Init();
42 if (status) {
43 delete hwc_display_null;
44 return status;
45 }
46
47 *hwc_display = hwc_display_null;
48
49 return 0;
50 }
51
Destroy(HWCDisplay * hwc_display)52 void HWCDisplayNull::Destroy(HWCDisplay *hwc_display) {
53 DLOGI("Null display is being destroyed");
54 hwc_display->Deinit();
55 delete hwc_display;
56 }
57
58 // We pass the display type as HWC_DISPLAY_PRIMARY to HWCDisplay, but since we override
59 // and don't chain to HWCDisplay::Init(), that type does not actually get used.
HWCDisplayNull(CoreInterface * core_intf,hwc_procs_t const ** hwc_procs)60 HWCDisplayNull::HWCDisplayNull(CoreInterface *core_intf, hwc_procs_t const **hwc_procs)
61 : HWCDisplay(core_intf, hwc_procs, kPrimary, HWC_DISPLAY_PRIMARY, false, NULL,
62 DISPLAY_CLASS_NULL) {
63 }
64
Init()65 int HWCDisplayNull::Init() {
66 // Don't call HWCDisplay::Init() for null display, we don't want the chain of
67 // DisplayPrimary / HWPrimary etc objects to be created.
68 return 0;
69 }
70
Deinit()71 int HWCDisplayNull::Deinit() {
72 return 0;
73 }
74
Prepare(hwc_display_contents_1_t * content_list)75 int HWCDisplayNull::Prepare(hwc_display_contents_1_t *content_list) {
76 for (size_t i = 0; i < content_list->numHwLayers; i++) {
77 if (content_list->hwLayers[i].compositionType == HWC_FRAMEBUFFER_TARGET ||
78 content_list->hwLayers[i].compositionType == HWC_BACKGROUND) {
79 continue;
80 }
81
82 content_list->hwLayers[i].compositionType = HWC_OVERLAY;
83 }
84
85 return 0;
86 }
87
Commit(hwc_display_contents_1_t * content_list)88 int HWCDisplayNull::Commit(hwc_display_contents_1_t *content_list) {
89 // HWCSession::Commit (from where this is called) already closes all the acquire
90 // fences once we return from here. So no need to close acquire fences here.
91 for (size_t i = 0; i < content_list->numHwLayers; i++) {
92 content_list->hwLayers[i].releaseFenceFd = -1;
93 }
94
95 return 0;
96 }
97
98 #define NULL_DISPLAY_FPS 60
99
GetDisplayAttributes(uint32_t config,const uint32_t * display_attributes,int32_t * values)100 int HWCDisplayNull::GetDisplayAttributes(uint32_t config, const uint32_t *display_attributes,
101 int32_t *values) {
102 for (int i = 0; display_attributes[i] != HWC_DISPLAY_NO_ATTRIBUTE; i++) {
103 // We fake display resolution as 1080P by default, though it can be overriden through a call to
104 // SetResolution(), and DPI as 160, though what the DPI value does is not clear
105 switch (display_attributes[i]) {
106 case HWC_DISPLAY_VSYNC_PERIOD:
107 values[i] = INT32(1000000000L / NULL_DISPLAY_FPS);
108 break;
109 case HWC_DISPLAY_WIDTH:
110 values[i] = static_cast<int32_t>(x_res_);
111 break;
112 case HWC_DISPLAY_HEIGHT:
113 values[i] = static_cast<int32_t>(y_res_);
114 break;
115 }
116 }
117 return 0;
118 }
119
120 } // namespace sdm
121