[PATCH v2 26/43] drm/sun4i: frontend: Add support for packed YUV422 input formats

[Paul Kocialkowski]

This introduces support for packed YUV formats with 4:2:2 sampling using
the frontend. Definitions are introduced for the data format and pixel
sequence input format register values.

Signed-off-by: Paul Kocialkowski <paul.kocialkow...@bootlin.com>
---
 drivers/gpu/drm/sun4i/sun4i_frontend.c | 22 ++++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun4i_frontend.h |  5 +++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c 
b/drivers/gpu/drm/sun4i/sun4i_frontend.c
index 4700133b96e0..f443e8e1d8ec 100644
--- a/drivers/gpu/drm/sun4i/sun4i_frontend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c
@@ -130,6 +130,8 @@ static int sun4i_frontend_drm_format_to_input_fmt(uint32_t 
fmt, u32 *val)
 {
        if (!drm_format_is_yuv(fmt))
                *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_RGB;
+       else if (drm_format_is_yuv_sampling_422(fmt))
+               *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV422;
        else
                return -EINVAL;
 
@@ -153,10 +155,26 @@ static int 
sun4i_frontend_drm_format_to_input_sequence(uint32_t fmt, u32 *val)
                *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_BGRX;
                return 0;
 
+       case DRM_FORMAT_UYVY:
+               *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UYVY;
+               return 0;
+
+       case DRM_FORMAT_VYUY:
+               *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VYUY;
+               return 0;
+
        case DRM_FORMAT_XRGB8888:
                *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_XRGB;
                return 0;
 
+       case DRM_FORMAT_YUYV:
+               *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YUYV;
+               return 0;
+
+       case DRM_FORMAT_YVYU:
+               *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YVYU;
+               return 0;
+
        default:
                return -EINVAL;
        }
@@ -180,7 +198,11 @@ static int 
sun4i_frontend_drm_format_to_output_fmt(uint32_t fmt, u32 *val)
 
 static const uint32_t sun4i_frontend_formats[] = {
        DRM_FORMAT_BGRX8888,
+       DRM_FORMAT_UYVY,
+       DRM_FORMAT_VYUY,
        DRM_FORMAT_XRGB8888,
+       DRM_FORMAT_YUYV,
+       DRM_FORMAT_YVYU,
 };
 
 bool sun4i_frontend_format_is_supported(uint32_t fmt)
diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.h 
b/drivers/gpu/drm/sun4i/sun4i_frontend.h
index fb097c34e160..399755939a28 100644
--- a/drivers/gpu/drm/sun4i/sun4i_frontend.h
+++ b/drivers/gpu/drm/sun4i/sun4i_frontend.h
@@ -27,7 +27,12 @@
 
 #define SUN4I_FRONTEND_INPUT_FMT_REG           0x04c
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_PACKED       (1 << 8)
+#define SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV422       (1 << 4)
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_RGB          (5 << 4)
+#define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UYVY          0
+#define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YUYV          1
+#define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VYUY          2
+#define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YVYU          3
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_BGRX          0
 #define SUN4I_FRONTEND_INPUT_FMT_DATA_PS_XRGB          1
 
-- 
2.19.1