[PATCH i-g-t v3 1/2] lib/intel_blt: Add helper function to ensure platform has flat-ccs enabled

[Akshata Jahagirdar]

Add helper function to check if platform has flat-ccs enabled  by
reading from debugfs entry.

Signed-off-by: Akshata Jahagirdar <akshata.jahagirdar at intel.com>
Reviewed-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
---
 lib/intel_blt.c | 14 ++++++++++++++
 lib/intel_blt.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/lib/intel_blt.c b/lib/intel_blt.c
index fe0a45cb8..a5ee302c4 100644
--- a/lib/intel_blt.c
+++ b/lib/intel_blt.c
@@ -464,6 +464,20 @@ bool blt_block_copy_supports_compression(int fd)
 				    BLT_CMD_SUPPORTS_COMPRESSION);
 }
 
+/**
+ * blt_platform_has_flat_ccs_enabled
+ * @fd: drm fd
+ *
+ * Check if platform provided by @fd device has flat-ccs enabled.
+ *
+ * Returns:
+ * true if it does, false otherwise.
+ */
+bool blt_platform_has_flat_ccs_enabled(int fd)
+{
+	return igt_debugfs_search(fd, "info", "has_flat_ccs yes");
+}
+
 /**
  * blt_uses_extended_block_copy
  * @fd: drm fd
diff --git a/lib/intel_blt.h b/lib/intel_blt.h
index 1f6c71359..60558d1dc 100644
--- a/lib/intel_blt.h
+++ b/lib/intel_blt.h
@@ -209,6 +209,7 @@ bool blt_fast_copy_supports_tiling(int fd, enum blt_tiling_type tiling);
 bool blt_block_copy_supports_tiling(int fd, enum blt_tiling_type tiling);
 bool blt_xy_src_copy_supports_tiling(int fd, enum blt_tiling_type tiling);
 bool blt_block_copy_supports_compression(int fd);
+bool blt_platform_has_flat_ccs_enabled(int fd);
 bool blt_uses_extended_block_copy(int fd);
 
 const char *blt_tiling_name(enum blt_tiling_type tiling);
-- 
2.34.1