FROMLIST: media: qcom: venus: drop extra padding in NV12 raw size calculation

get_framesize_raw_nv12() currently adds SZ_4K to the UV plane size and an
additional SZ_8K to the total buffer size. This inflates the calculated
sizeimage and leads userspace to over-allocate buffers without a clear
requirement.

Remove the extra SZ_4K/SZ_8K padding and compute the NV12 size as the sum
of Y and UV planes, keeping the final ALIGN(size, SZ_4K) intact.

Link: https://lore.kernel.org/linux-arm-msm/20260331-fix_venus_bug_issue-v1-1-e4ae7a1d8db2@oss.qualcomm.com

Fixes: e1cb72d ("media: venus: helpers: move frame size calculations on common place")
Signed-off-by: Renjiang Han <renjiang.han@oss.qualcomm.com>

Author: Renjiang Han

drivers/media/platform/qcom/venus/helpers.c

@@ -954,8 +954,8 @@ static u32 get_framesize_raw_nv12(u32 width, u32 height)
 	uv_sclines = ALIGN(((height + 1) >> 1), 16);
 
 	y_plane = y_stride * y_sclines;
-	uv_plane = uv_stride * uv_sclines + SZ_4K;
-	size = y_plane + uv_plane + SZ_8K;
+	uv_plane = uv_stride * uv_sclines;
+	size = y_plane + uv_plane;
 
 	return ALIGN(size, SZ_4K);
 }