drm/mediatek: Support reflect-x plane rotation

Add support for REFLECT_X rotations.

Cc: Fritz Koenig <frkoenig@chromium.org>
Cc: Daniele Castagna <dcastagna@chromium.org>
Cc: Miguel Casas <mcasas@chromium.org>
Cc: Mark Yacoub <markyacoub@google.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index fae10ae..f4c4d3f 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -53,6 +53,7 @@
 #define        OVL_CON_AEN             BIT(8)
 #define        OVL_CON_ALPHA           0xff
 #define        OVL_CON_VIRT_FLIP       BIT(9)
+#define        OVL_CON_HORZ_FLIP       BIT(10)
 
 struct mtk_disp_ovl_data {
        unsigned int addr;
@@ -142,7 +143,8 @@ static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
 
 static unsigned int mtk_ovl_supported_rotations(struct mtk_ddp_comp *comp)
 {
-       return DRM_MODE_ROTATE_0 | DRM_MODE_REFLECT_Y;
+       return DRM_MODE_ROTATE_0 | DRM_MODE_REFLECT_Y |
+              DRM_MODE_REFLECT_X;
 }
 
 static int mtk_ovl_layer_check(struct mtk_ddp_comp *comp, unsigned int idx,
@@ -153,6 +155,7 @@ static int mtk_ovl_layer_check(struct mtk_ddp_comp *comp, unsigned int idx,
 
        rotation = drm_rotation_simplify(state->rotation,
                                         DRM_MODE_ROTATE_0 |
+                                        DRM_MODE_REFLECT_X |
                                         DRM_MODE_REFLECT_Y);
        rotation &= ~DRM_MODE_ROTATE_0;
 
@@ -269,6 +272,11 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
                addr += (pending->height - 1) * pending->pitch;
        }
 
+       if (pending->rotation & DRM_MODE_REFLECT_X) {
+               con |= OVL_CON_HORZ_FLIP;
+               addr += pending->pitch - 1;
+       }
+
        writel_relaxed(con, comp->regs + DISP_REG_OVL_CON(idx));
        writel_relaxed(pitch, comp->regs + DISP_REG_OVL_PITCH(idx));
        writel_relaxed(src_size, comp->regs + DISP_REG_OVL_SRC_SIZE(idx));