From: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>

[Why]
DML failures occur for 420 modes with dynamic pipe
splitting enabled because the ChromaViewport exceeds
the ChromaSurfaceWidth.

This is caused by adding the viewport_width instead
of the viewport_width_c.

This similarly occurs for rotated modes due to the
use of viewport_height instead of viewport_height_c.

[How]
Correct the calculations.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
Reviewed-by: Dmytro Laktyushkin <dmytro.laktyush...@amd.com>
Acked-by: Qingqing Zhuo <qingqing.z...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c 
b/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
index 5a1ca8a5954c..7916a7ea9336 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
@@ -623,14 +623,14 @@ static void fetch_pipe_params(struct display_mode_lib 
*mode_lib)
                                                
mode_lib->vba.ViewportWidth[mode_lib->vba.NumberOfActivePlanes] +=
                                                                
src_k->viewport_width;
                                                
mode_lib->vba.ViewportWidthChroma[mode_lib->vba.NumberOfActivePlanes] +=
-                                                               
src_k->viewport_width;
+                                                               
src_k->viewport_width_c;
                                                
mode_lib->vba.ScalerRecoutWidth[mode_lib->vba.NumberOfActivePlanes] +=
                                                                
dst_k->recout_width;
                                        } else {
                                                
mode_lib->vba.ViewportHeight[mode_lib->vba.NumberOfActivePlanes] +=
                                                                
src_k->viewport_height;
                                                
mode_lib->vba.ViewportHeightChroma[mode_lib->vba.NumberOfActivePlanes] +=
-                                                               
src_k->viewport_height;
+                                                               
src_k->viewport_height_c;
                                        }
                                        
mode_lib->vba.NumberOfDSCSlices[mode_lib->vba.NumberOfActivePlanes] +=
                                                        dout_k->dsc_slices;
-- 
2.17.1

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