From 861379c030e3366193678493188d56869cab77d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Tue, 20 Dec 2011 00:33:24 +0200
Subject: [PATCH] --- yaml --- r: 282550 b: refs/heads/master c:
 d0d110e096298d2715aa26b3698e604e0d4a2fb9 h: refs/heads/master v: v3

---
 [refs]                                  |  2 +-
 trunk/drivers/gpu/drm/drm_crtc_helper.c | 33 +++++++++++++++++++++++++
 trunk/include/drm/drm_crtc_helper.h     |  3 +++
 3 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index e58b81dd5875..44aaec26bdf5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c75488376a55c207172f78664d600b87df88107f
+refs/heads/master: d0d110e096298d2715aa26b3698e604e0d4a2fb9
diff --git a/trunk/drivers/gpu/drm/drm_crtc_helper.c b/trunk/drivers/gpu/drm/drm_crtc_helper.c
index 0cd2ba19bad1..84a4a809793f 100644
--- a/trunk/drivers/gpu/drm/drm_crtc_helper.c
+++ b/trunk/drivers/gpu/drm/drm_crtc_helper.c
@@ -1015,3 +1015,36 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
 		queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
 }
 EXPORT_SYMBOL(drm_helper_hpd_irq_event);
+
+
+/**
+ * drm_format_num_planes - get the number of planes for format
+ * @format: pixel format (DRM_FORMAT_*)
+ *
+ * RETURNS:
+ * The number of planes used by the specified pixel format.
+ */
+int drm_format_num_planes(uint32_t format)
+{
+	switch (format) {
+	case DRM_FORMAT_YUV410:
+	case DRM_FORMAT_YVU410:
+	case DRM_FORMAT_YUV411:
+	case DRM_FORMAT_YVU411:
+	case DRM_FORMAT_YUV420:
+	case DRM_FORMAT_YVU420:
+	case DRM_FORMAT_YUV422:
+	case DRM_FORMAT_YVU422:
+	case DRM_FORMAT_YUV444:
+	case DRM_FORMAT_YVU444:
+		return 3;
+	case DRM_FORMAT_NV12:
+	case DRM_FORMAT_NV21:
+	case DRM_FORMAT_NV16:
+	case DRM_FORMAT_NV61:
+		return 2;
+	default:
+		return 1;
+	}
+}
+EXPORT_SYMBOL(drm_format_num_planes);
diff --git a/trunk/include/drm/drm_crtc_helper.h b/trunk/include/drm/drm_crtc_helper.h
index e88b7d70594e..37515d1afab3 100644
--- a/trunk/include/drm/drm_crtc_helper.h
+++ b/trunk/include/drm/drm_crtc_helper.h
@@ -144,4 +144,7 @@ extern void drm_helper_hpd_irq_event(struct drm_device *dev);
 
 extern void drm_kms_helper_poll_disable(struct drm_device *dev);
 extern void drm_kms_helper_poll_enable(struct drm_device *dev);
+
+extern int drm_format_num_planes(uint32_t format);
+
 #endif