[PATCH v3 6/8] drm/rockchip: vop2: Enforce AFBC transform stride align in plane_check

[Nicolas Frattaroli]

From: Daniel Stone <daniels at collabora.com>

Make sure we can't break the hardware by requesting an unsupported
configuration.

Signed-off-by: Daniel Stone <daniels at collabora.com>
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli at collabora.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index a029ed73dda7..337b01ed29a6 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -1083,6 +1083,15 @@ static int vop2_plane_atomic_check(struct drm_plane *plane,
 		return -EINVAL;
 	}
 
+	if (drm_is_afbc(fb->modifier) &&
+	    pstate->rotation &
+		(DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270) &&
+	    (fb->pitches[0] << 3) / vop2_get_bpp(fb->format) % 64) {
+		drm_dbg_kms(vop2->drm,
+			    "AFBC buffers must be 64-byte aligned for horizontal rotation or mirroring\n");
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -1290,9 +1299,6 @@ static void vop2_plane_atomic_update(struct drm_plane *plane,
 		 * with WIN_VIR_STRIDE.
 		 */
 		stride = (fb->pitches[0] << 3) / bpp;
-		if ((stride & 0x3f) && (xmirror || rotate_90 || rotate_270))
-			drm_dbg_kms(vop2->drm, "vp%d %s stride[%d] not 64 pixel aligned\n",
-				    vp->id, win->data->name, stride);
 
 		 /* It's for head stride, each head size is 16 byte */
 		stride = ALIGN(stride, block_w) / block_w * 16;

-- 
2.52.0