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authorTomi Valkeinen <tomi.valkeinen@ti.com>2019-01-11 12:09:40 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2019-01-14 09:27:28 +0200
commit82b200e00c2c7dbeae108b21b2bba39305300d4a (patch)
tree9b2c3970fa97256a15ce520fdb0da0d4682036ac
parent6126525e3921d2ccc54ca393e6a24d4bd0f08429 (diff)
card: add open_modesetting_card()
Add open_modesetting_card() which iterates the DRM cards and returns the first one that has crtcs and connectors. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
-rw-r--r--kms++/inc/kms++/card.h3
-rw-r--r--kms++/src/card.cpp20
2 files changed, 23 insertions, 0 deletions
diff --git a/kms++/inc/kms++/card.h b/kms++/inc/kms++/card.h
index 72111f1..4b0d877 100644
--- a/kms++/inc/kms++/card.h
+++ b/kms++/inc/kms++/card.h
@@ -3,6 +3,7 @@
#include <cstdint>
#include <vector>
#include <map>
+#include <memory>
#include "decls.h"
#include "pipeline.h"
@@ -13,6 +14,8 @@ class Card
{
friend class Framebuffer;
public:
+ static std::unique_ptr<Card> open_modesetting_card();
+
Card();
Card(const std::string& dev_path);
Card(const std::string& driver, uint32_t idx);
diff --git a/kms++/src/card.cpp b/kms++/src/card.cpp
index 4632f22..04750af 100644
--- a/kms++/src/card.cpp
+++ b/kms++/src/card.cpp
@@ -7,6 +7,7 @@
#include <algorithm>
#include <cerrno>
#include <algorithm>
+#include <sys/stat.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
@@ -18,6 +19,25 @@ using namespace std;
namespace kms
{
+unique_ptr<Card> Card::open_modesetting_card()
+{
+ for (uint32_t i = 0; ; ++i) {
+ string path = "/dev/dri/card" + to_string(i);
+
+ struct stat buffer;
+ if (stat(path.c_str(), &buffer))
+ break;
+
+ unique_ptr<Card> card = unique_ptr<Card>(new Card(path));
+
+ if (card->get_connectors().size() > 0 &&
+ card->get_crtcs().size() > 0)
+ return card;
+ }
+
+ throw runtime_error("No modesetting DRM card found");
+}
+
static int open_device_by_path(string path)
{
int fd = open(path.c_str(), O_RDWR | O_CLOEXEC);