diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index 9ac1f2e0f064..8a3b271c135b 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -92,7 +92,7 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb,
 		return 0;
 
 	paddr = obj->paddr + fb->offsets[plane];
-	paddr += fb->format->cpp[plane] * (state->src_x >> 16);
+	paddr += fb->format->bpp[plane] / 8 * (state->src_x >> 16);
 	paddr += fb->pitches[plane] * (state->src_y >> 16);
 
 	return paddr;