[PATCH 07/14] exynos/fimg2d: add g2d_validate_xyz() functions

[Tobias Jakobi]

The G2D headers define a number of modes through enums
(like e.g. color, select, repeat, etc.).

This introduces g2d_validate_select_mode() and
g2d_validate_blending_op() which validate a
select mode or blending operation respectively.

Signed-off-by: Tobias Jakobi <tjakobi at math.uni-bielefeld.de>
---
 exynos/exynos_fimg2d.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/exynos/exynos_fimg2d.c b/exynos/exynos_fimg2d.c
index 2e04f4a..781aff5 100644
--- a/exynos/exynos_fimg2d.c
+++ b/exynos/exynos_fimg2d.c
@@ -119,6 +119,50 @@ static unsigned int g2d_check_space(const struct g2d_context *ctx,
 }
 
 /*
+ * g2d_validate_select_mode - validate select mode.
+ *
+ * @mode: the mode to validate
+ */
+static unsigned int g2d_validate_select_mode(
+	enum e_g2d_select_mode mode)
+{
+	switch (mode) {
+	case G2D_SELECT_MODE_NORMAL:
+	case G2D_SELECT_MODE_FGCOLOR:
+	case G2D_SELECT_MODE_BGCOLOR:
+		return 0;
+	}
+
+	return 1;
+}
+
+/*
+ * g2d_validate_blending_op - validate blending operation.
+ *
+ * @operation: the operation to validate
+ */
+static unsigned int g2d_validate_blending_op(
+	enum e_g2d_op operation)
+{
+	switch (operation) {
+	case G2D_OP_CLEAR:
+	case G2D_OP_SRC:
+	case G2D_OP_DST:
+	case G2D_OP_OVER:
+	case G2D_OP_INTERPOLATE:
+	case G2D_OP_DISJOINT_CLEAR:
+	case G2D_OP_DISJOINT_SRC:
+	case G2D_OP_DISJOINT_DST:
+	case G2D_OP_CONJOINT_CLEAR:
+	case G2D_OP_CONJOINT_SRC:
+	case G2D_OP_CONJOINT_DST:
+		return 0;
+	}
+
+	return 1;
+}
+
+/*
  * g2d_add_cmd - set given command and value to user side command buffer.
  *
  * @ctx: a pointer to g2d_context structure.
-- 
2.0.5