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-rw-r--r--kms++/src/card.cpp11
-rw-r--r--kms++/src/connector.cpp1
2 files changed, 12 insertions, 0 deletions
diff --git a/kms++/src/card.cpp b/kms++/src/card.cpp
index 3a7ab70..1221408 100644
--- a/kms++/src/card.cpp
+++ b/kms++/src/card.cpp
@@ -217,6 +217,17 @@ void Card::setup()
m_has_atomic = false;
#endif
+#ifdef DRM_CLIENT_CAP_WRITEBACK_CONNECTORS
+ if (getenv("KMSXX_DISABLE_WRITEBACK_CONNECTORS") == 0) {
+ r = drmSetClientCap(m_fd, DRM_CLIENT_CAP_WRITEBACK_CONNECTORS, 1);
+ m_has_writeback = r == 0;
+ } else {
+ m_has_writeback = false;
+ }
+#else
+ m_has_writeback = false;
+#endif
+
uint64_t has_dumb;
r = drmGetCap(m_fd, DRM_CAP_DUMB_BUFFER, &has_dumb);
m_has_dumb = r == 0 && has_dumb;
diff --git a/kms++/src/connector.cpp b/kms++/src/connector.cpp
index a408619..6f5f79f 100644
--- a/kms++/src/connector.cpp
+++ b/kms++/src/connector.cpp
@@ -36,6 +36,7 @@ static const map<int, string> connector_names = {
{ DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
{ DRM_MODE_CONNECTOR_DSI, "DSI" },
{ DRM_MODE_CONNECTOR_DPI, "DPI" },
+ { DRM_MODE_CONNECTOR_WRITEBACK, "writeback" },
};
static const map<int, string> connection_str = {