diff -ruN libdrm-2.4.134/include/drm/drm.h libdrm-2.4.134-banan_os/include/drm/drm.h
--- libdrm-2.4.134/include/drm/drm.h	2026-05-29 11:49:42.000000000 +0300
+++ libdrm-2.4.134-banan_os/include/drm/drm.h	2026-07-05 09:48:55.334130492 +0300
@@ -44,7 +44,44 @@
 #else /* One of the BSDs */
 
 #include <stdint.h>
+#ifdef __banan_os__
+#define _IOC_NRBITS    8
+#define _IOC_TYPEBITS  8
+#define _IOC_SIZEBITS 14
+#define _IOC_DIRBITS   2
+
+#define _IOC_NRMASK   ((1 << _IOC_NRBITS  ) - 1)
+#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS) - 1)
+#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS) - 1)
+#define _IOC_DIRMASK  ((1 << _IOC_DIRBITS ) - 1)
+
+#define _IOC_NRSHIFT   0
+#define _IOC_TYPESHIFT (_IOC_NRSHIFT   + _IOC_NRBITS  )
+#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS)
+#define _IOC_DIRSHIFT  (_IOC_SIZESHIFT + _IOC_SIZEBITS)
+
+#define _IOC_NONE  0U
+#define _IOC_WRITE 1U
+#define _IOC_READ  2U
+
+#define _IOC(dir, type, nr, size) \
+	(((dir)  << _IOC_DIRSHIFT ) | \
+	 ((size) << _IOC_SIZESHIFT) | \
+	 ((type) << _IOC_TYPESHIFT) | \
+	 ((nr)   << _IOC_NRSHIFT  ))
+
+#define _IO(type, nr)         _IOC(_IOC_NONE,            (type), (nr), 0)
+#define _IOR(type, nr, size)  _IOC(_IOC_READ,            (type), (nr), sizeof(size))
+#define _IOW(type, nr, size)  _IOC(_IOC_WRITE,           (type), (nr), sizeof(size))
+#define _IOWR(type, nr, size) _IOC(_IOC_READ|_IOC_WRITE, (type), (nr), sizeof(size))
+
+#define _IOC_DIR(nr)  (((nr) >> _IOC_DIRSHIFT ) & _IOC_DIRMASK )
+#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
+#define _IOC_NR(nr)   (((nr) >> _IOC_NRSHIFT  ) & _IOC_NRMASK  )
+#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
+#else
 #include <sys/ioccom.h>
+#endif
 #include <sys/types.h>
 typedef int8_t   __s8;
 typedef uint8_t  __u8;
diff -ruN libdrm-2.4.134/xf86drm.h libdrm-2.4.134-banan_os/xf86drm.h
--- libdrm-2.4.134/xf86drm.h	2026-05-29 11:49:42.000000000 +0300
+++ libdrm-2.4.134-banan_os/xf86drm.h	2026-07-05 09:48:55.351883389 +0300
@@ -47,7 +47,7 @@
 #define DRM_MAX_MINOR   64 /* deprecated */
 #endif
 
-#if defined(__linux__)
+#if defined(__linux__) || defined(__banan_os__)
 
 #define DRM_IOCTL_NR(n)		_IOC_NR(n)
 #define DRM_IOC_VOID		_IOC_NONE