1 #include <stdio.h>
2 #include <unistd.h>
3 #include <fcntl.h>
4 #include <utility>
5 #include <stdexcept>
6 #include <string.h>
7 #include <algorithm>
9 #include <xf86drm.h>
10 #include <xf86drmMode.h>
12 #include "kms++.h"
14 #ifndef DRM_CLIENT_CAP_ATOMIC
15 #define DRM_CLIENT_CAP_ATOMIC 3
16 #endif
18 using namespace std;
20 namespace kms
21 {
23 Card::Card()
24 {
25 const char *card = "/dev/dri/card0";
27 int fd = open(card, O_RDWR | O_CLOEXEC);
28 if (fd < 0)
29 throw invalid_argument(string(strerror(errno)) + " opening " +
30 card);
31 m_fd = fd;
33 int r;
35 r = drmSetMaster(fd);
36 m_master = r == 0;
38 if (getenv("LIBKMSXX_DISABLE_UNIVERSAL_PLANES") == 0) {
39 r = drmSetClientCap(m_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
40 m_has_universal_planes = r == 0;
41 } else {
42 m_has_universal_planes = false;
43 }
45 if (getenv("LIBKMSXX_DISABLE_ATOMIC") == 0) {
46 r = drmSetClientCap(m_fd, DRM_CLIENT_CAP_ATOMIC, 1);
47 m_has_atomic = r == 0;
48 } else {
49 m_has_atomic = false;
50 }
52 uint64_t has_dumb;
53 r = drmGetCap(fd, DRM_CAP_DUMB_BUFFER, &has_dumb);
54 if (r || !has_dumb)
55 throw invalid_argument("Dumb buffers not available");
57 auto res = drmModeGetResources(m_fd);
58 if (!res)
59 throw invalid_argument("Can't get card resources");
61 for (int i = 0; i < res->count_connectors; ++i) {
62 uint32_t id = res->connectors[i];
63 m_obmap[id] = new Connector(*this, id, i);
64 }
66 for (int i = 0; i < res->count_crtcs; ++i) {
67 uint32_t id = res->crtcs[i];
68 m_obmap[id] = new Crtc(*this, id, i);
69 }
71 for (int i = 0; i < res->count_encoders; ++i) {
72 uint32_t id = res->encoders[i];
73 m_obmap[id] = new Encoder(*this, id);
74 }
76 drmModeFreeResources(res);
78 auto planeRes = drmModeGetPlaneResources(m_fd);
80 for (uint i = 0; i < planeRes->count_planes; ++i) {
81 uint32_t id = planeRes->planes[i];
82 m_obmap[id] = new Plane(*this, id);
83 }
85 drmModeFreePlaneResources(planeRes);
87 // collect all possible props
88 for (auto ob : get_objects()) {
89 auto props = drmModeObjectGetProperties(m_fd, ob->id(), ob->object_type());
91 if (props == nullptr)
92 continue;
94 for (unsigned i = 0; i < props->count_props; ++i) {
95 uint32_t prop_id = props->props[i];
97 if (m_obmap.find(prop_id) == m_obmap.end())
98 m_obmap[prop_id] = new Property(*this, prop_id);
99 }
101 drmModeFreeObjectProperties(props);
102 }
104 for (auto pair : m_obmap)
105 pair.second->setup();
106 }
108 Card::~Card()
109 {
110 for (auto pair : m_obmap)
111 delete pair.second;
113 close(m_fd);
114 }
116 template <class T> static void print_obs(const map<uint32_t, DrmObject*>& obmap)
117 {
118 for (auto pair : obmap) {
119 auto ob = pair.second;
120 if (dynamic_cast<T*>(ob)) {
121 ob->print_short();
122 //ob->print_props();
123 }
124 }
125 }
127 void Card::print_short() const
128 {
129 print_obs<Connector>(m_obmap);
130 print_obs<Encoder>(m_obmap);
131 print_obs<Crtc>(m_obmap);
132 print_obs<Plane>(m_obmap);
133 }
135 Property* Card::get_prop(const char *name) const
136 {
137 for (auto pair : m_obmap) {
138 auto prop = dynamic_cast<Property*>(pair.second);
139 if (!prop)
140 continue;
142 if (strcmp(name, prop->name()) == 0)
143 return prop;
144 }
146 throw invalid_argument(string("Card property ") + name + " not found");
147 }
149 Connector* Card::get_first_connected_connector() const
150 {
151 for(auto pair : m_obmap) {
152 auto c = dynamic_cast<Connector*>(pair.second);
154 if (c && c->connected())
155 return c;
156 }
158 throw invalid_argument("no connected connectors");
159 }
161 DrmObject* Card::get_object(uint32_t id) const
162 {
163 return m_obmap.at(id);
164 }
166 vector<Connector*> Card::get_connectors() const
167 {
168 vector<Connector*> v;
169 for(auto pair : m_obmap) {
170 auto p = dynamic_cast<Connector*>(pair.second);
171 if (p)
172 v.push_back(p);
173 }
174 return v;
175 }
177 vector<Plane*> Card::get_planes() const
178 {
179 vector<Plane*> v;
180 for(auto pair : m_obmap) {
181 auto p = dynamic_cast<Plane*>(pair.second);
182 if (p)
183 v.push_back(p);
184 }
185 return v;
186 }
188 vector<DrmObject*> Card::get_objects() const
189 {
190 vector<DrmObject*> v;
191 for(auto pair : m_obmap)
192 v.push_back(pair.second);
193 return v;
194 }
196 Crtc* Card::get_crtc_by_index(uint32_t idx) const
197 {
198 for(auto pair : m_obmap) {
199 auto crtc = dynamic_cast<Crtc*>(pair.second);
200 if (crtc && crtc->idx() == idx)
201 return crtc;
202 }
203 throw invalid_argument(string("Crtc #") + to_string(idx) + "not found");
204 }
206 Crtc* Card::get_crtc(uint32_t id) const { return dynamic_cast<Crtc*>(get_object(id)); }
207 Encoder* Card::get_encoder(uint32_t id) const { return dynamic_cast<Encoder*>(get_object(id)); }
208 Property* Card::get_prop(uint32_t id) const { return dynamic_cast<Property*>(get_object(id)); }
210 std::vector<kms::Pipeline> Card::get_connected_pipelines()
211 {
212 vector<Pipeline> outputs;
214 for (auto conn : get_connectors())
215 {
216 if (conn->connected() == false)
217 continue;
219 Crtc* crtc = conn->get_current_crtc();
221 if (!crtc) {
222 for (auto possible : conn->get_possible_crtcs()) {
223 if (find_if(outputs.begin(), outputs.end(), [possible](Pipeline out) { return out.crtc == possible; }) == outputs.end()) {
224 crtc = possible;
225 break;
226 }
227 }
228 }
230 if (!crtc)
231 throw invalid_argument(string("Connector #") +
232 to_string(conn->idx()) +
233 " has no possible crtcs");
235 outputs.push_back(Pipeline { crtc, conn });
236 }
238 return outputs;
239 }
241 }