[PATCH v9 6/8] drm: atmel-hlcdc: add vertical and horizontal scaling support for XLCDC

[Manikandan Muralidharan]

Update the vertical and horizontal scaler registers of XLCDC IP
with Bilinear and Bicubic co-efficients taps for Chroma and
Luma componenets of the Pixel.

Signed-off-by: Manikandan Muralidharan <manikanda...@microchip.com>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h  |  4 ++++
 .../gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c   | 20 +++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
index 1153d402f810..e1a0bb24b511 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
@@ -198,6 +198,8 @@
  * @disc_pos: discard area position register
  * @disc_size: discard area size register
  * @csc: color space conversion register
+ * @vxs_config: vertical scalar filter taps control register
+ * @hxs_config: horizontal scalar filter taps control register
  */
 struct atmel_hlcdc_layer_cfg_layout {
        int xstride[ATMEL_HLCDC_LAYER_MAX_PLANES];
@@ -217,6 +219,8 @@ struct atmel_hlcdc_layer_cfg_layout {
        int disc_pos;
        int disc_size;
        int csc;
+       int vxs_config;
+       int hxs_config;
 };
 
 /**
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c 
b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
index 8a5419ccc343..55ce4b2fcb88 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
@@ -966,6 +966,26 @@ static void atmel_xlcdc_csc_init(struct atmel_hlcdc_plane 
*plane,
                                            desc->layout.csc + i,
                                            xlcdc_csc_coeffs[i]);
        }
+
+       if (desc->layout.vxs_config && desc->layout.hxs_config) {
+               /*
+                * Updating vxs.config and hxs.config fixes the
+                * Green Color Issue in SAM9X7 EGT Video Player App
+                */
+               atmel_hlcdc_layer_write_cfg(&plane->layer,
+                                           desc->layout.vxs_config,
+                                           ATMEL_XLCDC_LAYER_VXSYCFG_ONE |
+                                           ATMEL_XLCDC_LAYER_VXSYTAP2_ENABLE |
+                                           ATMEL_XLCDC_LAYER_VXSCCFG_ONE |
+                                           ATMEL_XLCDC_LAYER_VXSCTAP2_ENABLE);
+
+               atmel_hlcdc_layer_write_cfg(&plane->layer,
+                                           desc->layout.hxs_config,
+                                           ATMEL_XLCDC_LAYER_HXSYCFG_ONE |
+                                           ATMEL_XLCDC_LAYER_HXSYTAP2_ENABLE |
+                                           ATMEL_XLCDC_LAYER_HXSCCFG_ONE |
+                                           ATMEL_XLCDC_LAYER_HXSCTAP2_ENABLE);
+       }
 }
 
 static int atmel_hlcdc_plane_init_properties(struct atmel_hlcdc_plane *plane)
-- 
2.25.1