[PATCH v2 08/13] exynos: fimg2d: add g2d_set_direction

[Tobias Jakobi <tjakobi@math.uni-bielefeld.de>]

This allows setting the two direction registers, which specify how
the engine blits pixels. This can be used for overlapping blits,
which happen e.g. when 'moving' a rectangular region inside a
fixed buffer.

Reviewed-by: Hyungwon Hwang <human.hwang@samsung.com>
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
---
 exynos/exynos_fimg2d.c | 13 +++++++++++++
 exynos/exynos_fimg2d.h | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/exynos/exynos_fimg2d.c b/exynos/exynos_fimg2d.c
index e997d4b..4d5419c 100644
--- a/exynos/exynos_fimg2d.c
+++ b/exynos/exynos_fimg2d.c
@@ -242,6 +242,19 @@ static void g2d_add_base_addr(struct g2d_context *ctx, struct g2d_image *img,
 }
 
 /*
+ * g2d_set_direction - setup direction register (useful for overlapping blits).
+ *
+ * @ctx: a pointer to g2d_context structure.
+ * @dir: a pointer to the g2d_direction_val structure.
+ */
+static void g2d_set_direction(struct g2d_context *ctx,
+			const union g2d_direction_val *dir)
+{
+	g2d_add_cmd(ctx, SRC_MASK_DIRECT_REG, dir->val[0]);
+	g2d_add_cmd(ctx, DST_PAT_DIRECT_REG, dir->val[1]);
+}
+
+/*
  * g2d_reset - reset fimg2d hardware.
  *
  * @ctx: a pointer to g2d_context structure.
diff --git a/exynos/exynos_fimg2d.h b/exynos/exynos_fimg2d.h
index c6b58ac..9eee7c0 100644
--- a/exynos/exynos_fimg2d.h
+++ b/exynos/exynos_fimg2d.h
@@ -189,6 +189,11 @@ enum e_g2d_exec_flag {
 	G2D_EXEC_FLAG_ASYNC = (1 << 0)
 };
 
+enum e_g2d_dir_mode {
+	G2D_DIR_MODE_POSITIVE = 0,
+	G2D_DIR_MODE_NEGATIVE = 1
+};
+
 union g2d_point_val {
 	unsigned int val;
 	struct {
@@ -269,6 +274,39 @@ union g2d_blend_func_val {
 	} data;
 };
 
+union g2d_direction_val {
+	unsigned int val[2];
+	struct {
+		/* SRC_MSK_DIRECT_REG [0:1] (source) */
+		enum e_g2d_dir_mode		src_x_direction:1;
+		enum e_g2d_dir_mode		src_y_direction:1;
+
+		/* SRC_MSK_DIRECT_REG [2:3] */
+		unsigned int			reversed1:2;
+
+		/* SRC_MSK_DIRECT_REG [4:5] (mask) */
+		enum e_g2d_dir_mode		mask_x_direction:1;
+		enum e_g2d_dir_mode		mask_y_direction:1;
+
+		/* SRC_MSK_DIRECT_REG [6:31] */
+		unsigned int			padding1:26;
+
+		/* DST_PAT_DIRECT_REG [0:1] (destination) */
+		enum e_g2d_dir_mode		dst_x_direction:1;
+		enum e_g2d_dir_mode		dst_y_direction:1;
+
+		/* DST_PAT_DIRECT_REG [2:3] */
+		unsigned int			reversed2:2;
+
+		/* DST_PAT_DIRECT_REG [4:5] (pattern) */
+		enum e_g2d_dir_mode		pat_x_direction:1;
+		enum e_g2d_dir_mode		pat_y_direction:1;
+
+		/* DST_PAT_DIRECT_REG [6:31] */
+		unsigned int			padding2:26;
+	} data;
+};
+
 struct g2d_image {
 	enum e_g2d_select_mode		select_mode;
 	enum e_g2d_color_mode		color_mode;
-- 
2.4.9