card: don't throw when no resources

Allow opening DRM cards without any resources.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 30 insertions, 30 deletions

diff --git a/kms++/src/card.cpp b/kms++/src/card.cpp
index 5d6a597..3b3e2c1 100644
--- a/kms++/src/card.cpp
+++ b/kms++/src/card.cpp
@@ -147,43 +147,43 @@ void Card::setup()
 		throw invalid_argument("Dumb buffers not available");
 
 	auto res = drmModeGetResources(m_fd);
-	if (!res)
-		throw invalid_argument("Can't get card resources");
-
-	for (int i = 0; i < res->count_connectors; ++i) {
-		uint32_t id = res->connectors[i];
-		auto ob = new Connector(*this, id, i);
-		m_obmap[id] = ob;
-		m_connectors.push_back(ob);
-	}
+	if (res) {
+		for (int i = 0; i < res->count_connectors; ++i) {
+			uint32_t id = res->connectors[i];
+			auto ob = new Connector(*this, id, i);
+			m_obmap[id] = ob;
+			m_connectors.push_back(ob);
+		}
 
-	for (int i = 0; i < res->count_crtcs; ++i) {
-		uint32_t id = res->crtcs[i];
-		auto ob = new Crtc(*this, id, i);
-		m_obmap[id] = ob;
-		m_crtcs.push_back(ob);
-	}
+		for (int i = 0; i < res->count_crtcs; ++i) {
+			uint32_t id = res->crtcs[i];
+			auto ob = new Crtc(*this, id, i);
+			m_obmap[id] = ob;
+			m_crtcs.push_back(ob);
+		}
 
-	for (int i = 0; i < res->count_encoders; ++i) {
-		uint32_t id = res->encoders[i];
-		auto ob = new Encoder(*this, id, i);
-		m_obmap[id] = ob;
-		m_encoders.push_back(ob);
-	}
+		for (int i = 0; i < res->count_encoders; ++i) {
+			uint32_t id = res->encoders[i];
+			auto ob = new Encoder(*this, id, i);
+			m_obmap[id] = ob;
+			m_encoders.push_back(ob);
+		}
 
-	drmModeFreeResources(res);
+		drmModeFreeResources(res);
 
-	auto planeRes = drmModeGetPlaneResources(m_fd);
+		auto planeRes = drmModeGetPlaneResources(m_fd);
+		if (planeRes) {
+			for (uint i = 0; i < planeRes->count_planes; ++i) {
+				uint32_t id = planeRes->planes[i];
+				auto ob = new Plane(*this, id, i);
+				m_obmap[id] = ob;
+				m_planes.push_back(ob);
+			}
 
-	for (uint i = 0; i < planeRes->count_planes; ++i) {
-		uint32_t id = planeRes->planes[i];
-		auto ob = new Plane(*this, id, i);
-		m_obmap[id] = ob;
-		m_planes.push_back(ob);
+			drmModeFreePlaneResources(planeRes);
+		}
 	}
 
-	drmModeFreePlaneResources(planeRes);
-
 	// collect all possible props
 	for (auto ob : get_objects()) {
 		auto props = drmModeObjectGetProperties(m_fd, ob->id(), ob->object_type());