[PATCH v4 10/14] drm/rockchip: vop2: Switch to enum vop_csc_format

[Cristian Ciocaltea <cristian.ciocaltea@collabora.com>]

Improve code readability in vop2_setup_csc_mode() by using enum
vop_csc_format for the csc_mode variable, as well as for the return type
of the vop2_convert_csc_mode() helper, which already returns CSC_*
enumerators.

While at it, replace the nonsensical 'csc_mode = false' assignment in
the no-conversion branch with the equivalent CSC_BT601L, which carries
the same value (0) but is type-correct.

Tested-by: Igor Paunovic <royalnet026@gmail.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index e78cddc184d3..04db4c037421 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -648,7 +648,7 @@ static void vop2_setup_scale(struct vop2 *vop2, const struct vop2_win *win,
 	}
 }
 
-static int vop2_convert_csc_mode(int csc_mode)
+static enum vop_csc_format vop2_convert_csc_mode(int csc_mode)
 {
 	switch (csc_mode) {
 	case V4L2_COLORSPACE_SMPTE170M:
@@ -711,7 +711,7 @@ static void vop2_setup_csc_mode(struct vop2_video_port *vp,
 	int input_csc = V4L2_COLORSPACE_DEFAULT;
 	int output_csc = vcstate->color_space;
 	bool r2y_en, y2r_en;
-	int csc_mode;
+	enum vop_csc_format csc_mode;
 
 	if (is_input_yuv && !is_output_yuv) {
 		y2r_en = true;
@@ -724,7 +724,7 @@ static void vop2_setup_csc_mode(struct vop2_video_port *vp,
 	} else {
 		y2r_en = false;
 		r2y_en = false;
-		csc_mode = false;
+		csc_mode = CSC_BT601L;
 	}
 
 	vop2_win_write(win, VOP2_WIN_Y2R_EN, y2r_en);

-- 
2.55.0