[Intel-gfx] [PATCH v4 3/5] drm/i915: Introduce for_each_dbuf_slice_in_mask macro

[Stanislav Lisovskiy]

We quite often need now to iterate only particular dbuf slices
in mask, whether they are active or related to particular crtc.

v2: - Minor code refactoring

Let's make our life a bit easier and use a macro for that.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.h       | 7 +++++++
 drivers/gpu/drm/i915/display/intel_display_power.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index cc7f287804d7..9aab7e5181fd 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -187,6 +187,13 @@ enum plane_id {
 	for ((__p) = PLANE_PRIMARY; (__p) < I915_MAX_PLANES; (__p)++) \
 		for_each_if((__crtc)->plane_ids_mask & BIT(__p))
 
+#define for_each_dbuf_slice_in_mask(__slice, __mask) \
+	for ((__slice) = DBUF_S1; (__slice) < I915_MAX_DBUF_SLICES; (__slice)++) \
+		for_each_if((BIT(__slice)) & (__mask))
+
+#define for_each_dbuf_slice(__slice) \
+	for_each_dbuf_slice_in_mask(__slice, BIT(I915_MAX_DBUF_SLICES) - 1)
+
 enum port {
 	PORT_NONE = -1,
 
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h b/drivers/gpu/drm/i915/display/intel_display_power.h
index da64a5edae7a..815d8fec7e4a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power.h
@@ -311,6 +311,7 @@ intel_display_power_put_async(struct drm_i915_private *i915,
 enum dbuf_slice {
 	DBUF_S1,
 	DBUF_S2,
+	I915_DBUF_MAX_SLICES
 };
 
 #define with_intel_display_power(i915, domain, wf) \
-- 
2.24.1.485.gad05a3d8e5