initial commit

2 files changed, 203 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ca8d539
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,16 @@
+CC	?= gcc
+CFLAGS	?= -Os -g -std=c99
+CFLAGS	+= -Wall
+
+TARGETS	:= drminfo
+
+CFLAGS += $(shell pkg-config --cflags libdrm)
+LDLIBS += $(shell pkg-config --libs libdrm)
+
+all: $(TARGETS)
+
+clean:
+	rm -f $(TARGETS)
+	rm -f *~
+
+drminfo: drminfo.o
diff --git a/drminfo.c b/drminfo.c
new file mode 100644
index 0000000..ecacce8
--- /dev/null
+++ b/drminfo.c
@@ -0,0 +1,187 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+#include <getopt.h>
+
+#include <sys/ioctl.h>
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+/* ------------------------------------------------------------------ */
+
+static const char *conn_type[] = {
+    [ DRM_MODE_CONNECTOR_Unknown      ] = "Unknown",
+    [ DRM_MODE_CONNECTOR_VGA          ] = "VGA",
+    [ DRM_MODE_CONNECTOR_DVII         ] = "DVII",
+    [ DRM_MODE_CONNECTOR_DVID         ] = "DVID",
+    [ DRM_MODE_CONNECTOR_DVIA         ] = "DVIA",
+    [ DRM_MODE_CONNECTOR_Composite    ] = "Composite",
+    [ DRM_MODE_CONNECTOR_SVIDEO       ] = "SVIDEO",
+    [ DRM_MODE_CONNECTOR_LVDS         ] = "LVDS",
+    [ DRM_MODE_CONNECTOR_Component    ] = "Component",
+    [ DRM_MODE_CONNECTOR_9PinDIN      ] = "9PinDIN",
+    [ DRM_MODE_CONNECTOR_DisplayPort  ] = "DisplayPort",
+    [ DRM_MODE_CONNECTOR_HDMIA        ] = "HDMIA",
+    [ DRM_MODE_CONNECTOR_HDMIB        ] = "HDMIB",
+    [ DRM_MODE_CONNECTOR_TV           ] = "TV",
+    [ DRM_MODE_CONNECTOR_eDP          ] = "eDP",
+    [ DRM_MODE_CONNECTOR_VIRTUAL      ] = "VIRTUAL",
+    [ DRM_MODE_CONNECTOR_DSI          ] = "DSI",
+};
+
+static const char *conn_mode[] = {
+    [ DRM_MODE_CONNECTED         ] = "connected",
+    [ DRM_MODE_DISCONNECTED      ] = "disconnected",
+    [ DRM_MODE_UNKNOWNCONNECTION ] = "unknown",
+};
+
+static const char *enc_type[] = {
+    [ DRM_MODE_ENCODER_NONE         ] = "NONE",
+    [ DRM_MODE_ENCODER_DAC          ] = "DAC",
+    [ DRM_MODE_ENCODER_TMDS         ] = "TMDS",
+    [ DRM_MODE_ENCODER_LVDS         ] = "LVDS",
+    [ DRM_MODE_ENCODER_TVDAC        ] = "TVDAC",
+    [ DRM_MODE_ENCODER_VIRTUAL      ] = "VIRTUAL",
+    [ DRM_MODE_ENCODER_DSI          ] = "DSI",
+};
+
+static const char *enum2name(const char *names[], int len, int nr)
+{
+    if (nr >= len)
+        return "???";
+    if (!names[nr])
+        return "???";
+    return names[nr];
+}
+
+#define connector_type_name(_i) \
+    enum2name((conn_type), (sizeof(conn_type)/sizeof(conn_type[0])), (_i))
+
+#define connector_mode_name(_i)                                         \
+    enum2name((conn_mode), (sizeof(conn_mode)/sizeof(conn_mode[0])), (_i))
+
+#define encoder_type_name(_i) \
+    enum2name((enc_type), (sizeof(enc_type)/sizeof(enc_type[0])), (_i))
+
+/* ------------------------------------------------------------------ */
+
+static void drm_info(int devnr)
+{
+    drmModeConnector *conn;
+    drmModeEncoder *enc;
+    drmModeRes *res;
+    char dev[64];
+    int fd, i, m, c, e;
+
+    snprintf(dev, sizeof(dev), DRM_DEV_NAME, DRM_DIR_NAME, devnr);
+    fd = open(dev, O_RDWR);
+    if (fd < 0) {
+        fprintf(stderr, "open %s: %s\n", dev, strerror(errno));
+        exit(1);
+    }
+
+    res = drmModeGetResources(fd);
+    if (res == NULL) {
+        fprintf(stderr, "drmModeGetResources() failed\n");
+        exit(1);
+    }
+
+    for (i = 0; i < res->count_connectors; i++) {
+        conn = drmModeGetConnector(fd, res->connectors[i]);
+        if (!conn)
+            continue;
+
+        fprintf(stdout, "id %d: %s-%d, %s\n",
+                conn->connector_id,
+                connector_type_name(conn->connector_type),
+                conn->connector_type_id,
+                connector_mode_name(conn->connection));
+
+        if (conn->count_encoders) {
+            fprintf(stdout, "    %d encoders\n",
+                    conn->count_encoders);
+            for (e = 0; e < conn->count_encoders; e++) {
+                enc = drmModeGetEncoder(fd, conn->encoders[e]);
+                if (!enc)
+                    continue;
+                fprintf(stdout, "        id %d: %s%s\n",
+                        enc->encoder_id,
+                        encoder_type_name(enc->encoder_type),
+                        (enc->encoder_id == conn->encoder_id)
+                        ? " (active)" : "");
+                drmModeFreeEncoder(enc);
+            }
+        }
+
+        if (conn->count_modes) {
+            c = 1;
+            fprintf(stdout, "    %d modes\n", conn->count_modes);
+            for (m = 0; m < conn->count_modes; m++) {
+                if (m+1 < conn->count_modes &&
+                    conn->modes[m].hdisplay == conn->modes[m+1].hdisplay &&
+                    conn->modes[m].vdisplay == conn->modes[m+1].vdisplay) {
+                    c++;
+                } else {
+                    fprintf(stdout, "        %dx%d",
+                            conn->modes[m].hdisplay,
+                            conn->modes[m].vdisplay);
+                    if (c > 1) {
+                        fprintf(stdout, " (%dx)", c);
+                    }
+                    fprintf(stdout, "\n");
+                    c = 1;
+                };
+            }
+        } else {
+            fprintf(stdout, "    no modes\n");
+        }
+
+        drmModeFreeConnector(conn);
+        fprintf(stdout, "\n");
+    }
+}
+
+/* ------------------------------------------------------------------ */
+
+static void usage(FILE *fp)
+{
+    fprintf(fp,
+            "\n"
+            "usage: drminfo [ options ]\n"
+            "\n"
+            "options:\n"
+            "  -h         print this\n"
+            "  -c <nr>    pick card\n"
+            "\n");
+}
+
+int main(int argc, char **argv)
+{
+    int card = 0;
+    int c;
+
+    for (;;) {
+        c = getopt(argc, argv, "hc:");
+        if (c == -1)
+            break;
+        switch (c) {
+        case 'c':
+            card = atoi(optarg);
+            break;
+        case 'h':
+            usage(stdout);
+            exit(0);
+        default:
+            usage(stderr);
+            exit(1);
+        }
+    }
+
+    drm_info(card);
+    return 0;
+}