[PATCH i-g-t 2/6] i-g-t: lib: Add plane pixel format support

[Vidya Srinivas <vidya.srinivas@intel.com>]

From: Mahesh Kumar <mahesh1.kumar@intel.com>

This patch adds the following:
- Query supported pixel formats from kernel for a given
plane.
- Get number of supported pixel formats for a plane
- Check if format is supported by cairo
- Add support to get format name string

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Signed-off-by: Jyoti Yadav <jyoti.r.yadav@intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com>
---
 lib/igt_fb.c  | 16 ++++++++++++++++
 lib/igt_kms.c | 29 +++++++++++++++++++++++++++++
 lib/igt_kms.h |  7 +++++++
 3 files changed, 52 insertions(+)

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index d4eaed7..21d666d 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -68,6 +68,22 @@ static struct format_desc_struct {
 	DF(XRGB2101010,	RGB30,		32, 30),
 	DF(ARGB8888,	ARGB32,		32, 32),
 };
+
+const char *igt_get_format_name(uint32_t format)
+{
+	switch(format) {
+		case DRM_FORMAT_RGB565:
+			return "RGB565";
+		case DRM_FORMAT_XRGB8888:
+			return "XRGB8888";
+		case DRM_FORMAT_XRGB2101010:
+			return "XRGB2101010";
+		case DRM_FORMAT_ARGB8888:
+			return "ARGB8888";
+		default:
+			return "Unknown";
+	}
+}
 #undef DF
 
 #define for_each_format(f)	\
diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 223dbe4..cc17f5c 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -3639,3 +3639,32 @@ uint32_t kmstest_get_vbl_flag(uint32_t pipe_id)
 		return pipe_flag;
 	}
 }
+
+/**
+ * igt_is_cairo_supported_format:
+ * @pixel_format: pixel format to be checked in supported cairo list.
+ *
+ * Returns true if pixel format is present in the supported cairo pixel
+ * format list and returns false if not present/supported in cairo.
+ */
+bool igt_is_cairo_supported_format(uint32_t pixel_format)
+{
+	const uint32_t *igt_formats;
+	int num_igt_formats;
+	int i;
+
+	igt_get_all_cairo_formats(&igt_formats, &num_igt_formats);
+	for (i = 0; i < num_igt_formats; i++) {
+		if (pixel_format == igt_formats[i])
+			return true;
+	}
+	return false;
+}
+
+int igt_get_format_count_plane(igt_plane_t *plane)
+{
+	if (plane)
+		return plane->drm_plane->count_formats;
+
+	return -EINVAL;
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 2a480bf..ced7d73 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -389,6 +389,10 @@ void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
 void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
 void igt_wait_for_vblank_count(int drm_fd, enum pipe pipe, int count);
 
+bool igt_is_cairo_supported_format(uint32_t pixel_format);
+int igt_get_format_count_plane(igt_plane_t *plane);
+const char *igt_get_format_name(uint32_t format);
+
 static inline bool igt_output_is_connected(igt_output_t *output)
 {
 	/* Something went wrong during probe? */
@@ -486,6 +490,9 @@ static inline bool igt_output_is_connected(igt_output_t *output)
 	for (int j__ = 0; assert(igt_can_fail()), (plane) = &(display)->pipes[(pipe)].planes[j__], \
 		     j__ < (display)->pipes[(pipe)].n_planes; j__++)
 
+#define for_each_format_in_plane(plane, format)	\
+	for (int k__ = 0; (format) = plane->drm_plane->formats[k__], k__ < plane->drm_plane->count_formats; k__++)
+
 #define IGT_FIXED(i,f)	((i) << 16 | (f))
 
 /**
-- 
2.7.4

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