drm/msm/dpu: simplify dpu_plane_validate_src()

The plane's clipped coordinates has already been validated against FB
size in the drm_atomic_plane_check(). There is no need to check them
again. Remove corresponding checks and inline dpu_plane_validate_src().
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/527364/
Link: https://lore.kernel.org/r/20230316161653.4106395-22-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -895,25 +895,6 @@ static void dpu_plane_cleanup_fb(struct drm_plane *plane,
 				old_pstate->needs_dirtyfb);
 }
 
-static bool dpu_plane_validate_src(struct drm_rect *src,
-				   struct drm_rect *fb_rect,
-				   uint32_t min_src_size)
-{
-	/* Ensure fb size is supported */
-	if (drm_rect_width(fb_rect) > MAX_IMG_WIDTH ||
-	    drm_rect_height(fb_rect) > MAX_IMG_HEIGHT)
-		return false;
-
-	/* Ensure src rect is above the minimum size */
-	if (drm_rect_width(src) < min_src_size ||
-	    drm_rect_height(src) < min_src_size)
-		return false;
-
-	/* Ensure src is fully encapsulated in fb */
-	return drm_rect_intersect(fb_rect, src) &&
-		drm_rect_equals(fb_rect, src);
-}
-
 static int dpu_plane_check_inline_rotation(struct dpu_plane *pdpu,
 						const struct dpu_sspp_sub_blks *sblk,
 						struct drm_rect src, const struct dpu_format *fmt)
@@ -999,6 +980,14 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 	fb_rect.x2 = new_plane_state->fb->width;
 	fb_rect.y2 = new_plane_state->fb->height;
 
+	/* Ensure fb size is supported */
+	if (drm_rect_width(&fb_rect) > MAX_IMG_WIDTH ||
+	    drm_rect_height(&fb_rect) > MAX_IMG_HEIGHT) {
+		DPU_DEBUG_PLANE(pdpu, "invalid framebuffer " DRM_RECT_FMT "\n",
+				DRM_RECT_ARG(&fb_rect));
+		return -E2BIG;
+	}
+
 	max_linewidth = pdpu->catalog->caps->max_linewidth;
 
 	fmt = to_dpu_format(msm_framebuffer_format(new_plane_state->fb));
@@ -1013,7 +1002,8 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 		return -EINVAL;
 
 	/* check src bounds */
-	} else if (!dpu_plane_validate_src(&pipe_cfg->src_rect, &fb_rect, min_src_size)) {
+	} else if (drm_rect_width(&pipe_cfg->src_rect) < min_src_size ||
+		   drm_rect_height(&pipe_cfg->src_rect) < min_src_size) {
 		DPU_DEBUG_PLANE(pdpu, "invalid source " DRM_RECT_FMT "\n",
 				DRM_RECT_ARG(&pipe_cfg->src_rect));
 		return -E2BIG;