[PATCH v3 8/8] drm/rockchip: vop2: Fix the AFBC offsets of a source that starts inside a superblock

[Arun Iyengar via B4 Relay <devnull+aiyengar1990.gmail.com@kernel.org>]

From: Arun Iyengar <aiyengar1990@gmail.com>

For an AFBC source that starts inside a superblock, AFBC_TILE_NUM misses
the first, partial superblock column, and the transform offset is the
whole x position (truncated to 8 bits) instead of the offset inside the
superblock.

Count the columns from the first one the source touches and take the x
offset modulo the superblock width, as the vendor kernel does.

Fixes: 604be85547ce ("drm/rockchip: Add VOP2 driver")
Signed-off-by: Arun Iyengar <aiyengar1990@gmail.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 0c300279399a..fc36edfe79d8 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -431,7 +431,7 @@ static bool vop2_half_block_enable(struct drm_plane_state *pstate)
 }
 
 static u32 vop2_afbc_transform_offset(struct drm_plane_state *pstate,
-				      bool afbc_half_block_en)
+				      bool afbc_half_block_en, u32 block_w)
 {
 	struct drm_rect *src = &pstate->src;
 	struct drm_framebuffer *fb = pstate->fb;
@@ -479,7 +479,7 @@ static u32 vop2_afbc_transform_offset(struct drm_plane_state *pstate,
 		ty = act_yoffset;
 		break;
 	case DRM_MODE_REFLECT_Y:
-		tx = act_xoffset;
+		tx = act_xoffset % block_w;
 		ty = bottom_crop_line_num - act_yoffset;
 		break;
 	case DRM_MODE_ROTATE_90:
@@ -491,7 +491,7 @@ static u32 vop2_afbc_transform_offset(struct drm_plane_state *pstate,
 		ty = vir_width - width - act_xoffset;
 		break;
 	case 0:
-		tx = act_xoffset;
+		tx = act_xoffset % block_w;
 		ty = act_yoffset;
 		break;
 	}
@@ -1433,7 +1433,7 @@ static void vop2_plane_atomic_update(struct drm_plane *plane,
 		if (fb->modifier & AFBC_FORMAT_MOD_YTR)
 			afbc_format |= (1 << 4);
 
-		afbc_tile_num = ALIGN(src_w, block_w) / block_w;
+		afbc_tile_num = ALIGN(src_w + (src->x1 >> 16) % block_w, block_w) / block_w;
 
 		/*
 		 * AFBC pic_vir_width is count by pixel, this is different
@@ -1484,7 +1484,7 @@ static void vop2_plane_atomic_update(struct drm_plane *plane,
 			vop2_win_write(win, VOP2_WIN_AFBC_PLD_OFFSET, yrgb_mst);
 		}
 
-		transform_offset = vop2_afbc_transform_offset(pstate, half_block_en);
+		transform_offset = vop2_afbc_transform_offset(pstate, half_block_en, block_w);
 		vop2_win_write(win, VOP2_WIN_AFBC_HDR_PTR, yrgb_mst);
 		vop2_win_write(win, VOP2_WIN_AFBC_PIC_SIZE, act_info);
 		vop2_win_write(win, VOP2_WIN_TRANSFORM_OFFSET, transform_offset);

-- 
2.55.0