[PATCH i-g-t 1/3] lib/kms: Introduce for_each_plane_format()

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

A few places want to iterate just the formats supported by a plane,
ignoring the modifier aspect entirely. Add a new iterator for this
(for_each_plane_format()) to avoid everyone just open coding it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 lib/igt_kms.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index fcbb6a5ade3a..a58cb5cd3430 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -816,6 +816,18 @@ igt_output_crtc_t *__igt_output_crtc_populate(igt_display_t *display,
 	     (mode) < &(output)->config.connector->modes[(output)->config.connector->count_modes]; \
 	     (mode)++)
 
+/**
+ * for_each_plane_format:
+ * @plane: a pointer to an #igt_plane_t structure
+ * @format: format iterator
+ *
+ * This for loop iterates over all formats supported by @plane.
+ */
+#define for_each_plane_format(plane, format) \
+	for (int __i = 0; __i < (plane)->drm_plane->count_formats; __i++) \
+		for_each_if (((format) = (plane)->drm_plane->formats[__i], \
+			      1))
+
 #define IGT_FIXED(i,f)	((i) << 16 | (f))
 
 /**
-- 
2.52.0