[Intel-gfx] [PATCH 40/89] drm/i915/skl: Introduce a I915_MAX_PLANES macro

[Damien Lespiau]

This can be useful to declare structures around pipes and planes and
don't have to go back auditing the code if the next platorm bump that
number.

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index be82888..dcd1c72 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -74,6 +74,14 @@ enum transcoder {
 };
 #define transcoder_name(t) ((t) + 'A')
 
+/*
+ * This is the maximum (across all platforms) number of planes (primary +
+ * sprites) that can be active at the same time on one pipe.
+ *
+ * This value doesn't count the cursor plane.
+ */
+#define I915_MAX_PLANES	3
+
 enum plane {
 	PLANE_A = 0,
 	PLANE_B,
-- 
1.8.3.1