diff --git a/man/radeon.man b/man/radeon.man
index f4441c4b..889355bb 100644
--- a/man/radeon.man
+++ b/man/radeon.man
@@ -18,7 +18,8 @@ following features:
 .PD 0
 .TP 2
 \(bu
-Full support for 8-, 15-, 16- and 24-bit pixel depths;
+Full support for 8-, 15-, 16- and 24-bit pixel depths, and for 30-bit depth on Linux 3.16
+and later with EXA acceleration;
 .TP
 \(bu
 RandR 1.2 and RandR 1.3 support;
diff --git a/src/radeon_kms.c b/src/radeon_kms.c
index c1f885eb..bac98cb6 100644
--- a/src/radeon_kms.c
+++ b/src/radeon_kms.c
@@ -1250,6 +1250,7 @@ static Bool RADEONPreInitVisual(ScrnInfoPtr pScrn)
     case 15:
     case 16:
     case 24:
+    case 30:
 	break;
 
     default:
@@ -1765,6 +1766,22 @@ Bool RADEONPreInit_KMS(ScrnInfoPtr pScrn, int flags)
 
     if (!RADEONPreInitAccel_KMS(pScrn))              goto fail;
 
+    /* Depth 30 not yet supported under glamor. */
+    if (pScrn->depth == 30 && info->use_glamor) {
+	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		   "Given depth (%d) is not supported under GLAMOR accel. Select EXA.\n",
+		   pScrn->depth);
+	goto fail;
+    }
+
+    /* Depth 30 only supported since Linux 3.16 / kms driver minor version 39 */
+    if (pScrn->depth == 30 && info->dri2.pKernelDRMVersion->version_minor < 39) {
+	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		   "Given depth (%d) is not supported. Kernel too old. Needs Linux 3.16+\n",
+		   pScrn->depth);
+	goto fail;
+    }
+
     radeon_drm_queue_init();
 
     info->allowColorTiling2D = FALSE;