drm/msm/dpu: Disable scaling for unsupported scaler types

Scaling is not implemented for some type of scalers (QSEED2 and RGB) but
it was unintentionally re-enabled with change below. The remaining
condition in dpu_plane_atomic_check_pipe is not enough because it only
checks for length of scaler block (which is present). This patch adds a
additional check for setup_scaler operation.

Fixes: 8f15005 ("drm/msm/dpu: move scaling limitations out of the hw_catalog")
Signed-off-by: Vladimir Lypak <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Patchwork: https://patchwork.freedesktop.org/patch/681918/
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Baryshkov <[email protected]>

Author: vldly

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c

@@ -740,7 +740,7 @@ static int dpu_plane_atomic_check_pipe(struct dpu_plane *pdpu,
 	 * We already have verified scaling against platform limitations.
 	 * Now check if the SSPP supports scaling at all.
 	 */
-	if (!sblk->scaler_blk.len &&
+	if (!(sblk->scaler_blk.len && pipe->sspp->ops.setup_scaler) &&
 	    ((drm_rect_width(&new_plane_state->src) >> 16 !=
 	      drm_rect_width(&new_plane_state->dst)) ||
 	     (drm_rect_height(&new_plane_state->src) >> 16 !=