[PATCH 2/2] drm/exynos: gsc: Handles the combination of rotation and flip

[Hyungwon Hwang]

The unique results of all the combination of rotation and flip can
be represented by just 8 states. This patch handles all the combination
correctly.

Signed-off-by: Hyungwon Hwang <human.hwang at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_gsc.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c 
b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
index f1c6b76..808a0a0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
@@ -582,9 +582,17 @@ static int gsc_src_set_transf(struct device *dev,
                break;
        case EXYNOS_DRM_DEGREE_180:
                cfg |= GSC_IN_ROT_180;
+               if (flip & EXYNOS_DRM_FLIP_VERTICAL)
+                       cfg &= ~GSC_IN_ROT_XFLIP;
+               if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
+                       cfg &= ~GSC_IN_ROT_YFLIP;
                break;
        case EXYNOS_DRM_DEGREE_270:
                cfg |= GSC_IN_ROT_270;
+               if (flip & EXYNOS_DRM_FLIP_VERTICAL)
+                       cfg &= ~GSC_IN_ROT_XFLIP;
+               if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
+                       cfg &= ~GSC_IN_ROT_YFLIP;
                break;
        default:
                dev_err(ippdrv->dev, "inavlid degree value %d.\n", degree);
@@ -845,9 +853,17 @@ static int gsc_dst_set_transf(struct device *dev,
                break;
        case EXYNOS_DRM_DEGREE_180:
                cfg |= GSC_IN_ROT_180;
+               if (flip & EXYNOS_DRM_FLIP_VERTICAL)
+                       cfg &= ~GSC_IN_ROT_XFLIP;
+               if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
+                       cfg &= ~GSC_IN_ROT_YFLIP;
                break;
        case EXYNOS_DRM_DEGREE_270:
                cfg |= GSC_IN_ROT_270;
+               if (flip & EXYNOS_DRM_FLIP_VERTICAL)
+                       cfg &= ~GSC_IN_ROT_XFLIP;
+               if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
+                       cfg &= ~GSC_IN_ROT_YFLIP;
                break;
        default:
                dev_err(ippdrv->dev, "inavlid degree value %d.\n", degree);
-- 
1.9.1