[PATCH v2] drm/mediatek: Support UYVY and YUYV format for overlay

[Bibby Hsieh]

MT8173 overlay can support UYVY and YUYV format,
we add the format in DRM driver.

Signed-off-by: Bibby Hsieh <bibby.hsieh at mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz at chromium.org>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c  | 21 +++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_drm_plane.c |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index c703102..de05845 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -40,10 +40,13 @@
 #define	OVL_RDMA_MEM_GMC	0x40402020
 
 #define OVL_CON_BYTE_SWAP	BIT(24)
+#define OVL_CON_MTX_YUV_TO_RGB	(6 << 16)
 #define OVL_CON_CLRFMT_RGB565	(0 << 12)
 #define OVL_CON_CLRFMT_RGB888	(1 << 12)
 #define OVL_CON_CLRFMT_RGBA8888	(2 << 12)
 #define OVL_CON_CLRFMT_ARGB8888	(3 << 12)
+#define OVL_CON_CLRFMT_UYVY	(4 << 12)
+#define OVL_CON_CLRFMT_YUYV	(5 << 12)
 #define	OVL_CON_AEN		BIT(8)
 #define	OVL_CON_ALPHA		0xff
 
@@ -162,6 +165,21 @@ static unsigned int ovl_fmt_convert(unsigned int fmt)
 	case DRM_FORMAT_XBGR8888:
 	case DRM_FORMAT_ABGR8888:
 		return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
+	case DRM_FORMAT_UYVY:
+		return OVL_CON_CLRFMT_UYVY;
+	case DRM_FORMAT_YUYV:
+		return OVL_CON_CLRFMT_YUYV;
+	}
+}
+
+static bool ovl_yuv_space(unsigned int fmt)
+{
+	switch (fmt) {
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_YUYV:
+		return true;
+	default:
+		return false;
 	}
 }
 
@@ -183,6 +201,9 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
 	if (idx != 0)
 		con |= OVL_CON_AEN | OVL_CON_ALPHA;
 
+	if (ovl_yuv_space(fmt))
+		con |= OVL_CON_MTX_YUV_TO_RGB;
+
 	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));
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index c461a23..8c02d1d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -28,6 +28,8 @@
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_ARGB8888,
 	DRM_FORMAT_RGB565,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_YUYV,
 };
 
 static void mtk_plane_reset(struct drm_plane *plane)
-- 
1.9.1