drm/msm/dpu: rework dpu_plane_atomic_check()

Split pipe-dependent code from dpu_plane_atomic_check() into the
separate function dpu_plane_atomic_check_pipe(). This is one of
preparational steps to add r_pipe support.
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/527336/
Link: https://lore.kernel.org/r/20230316161653.4106395-24-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -904,6 +904,53 @@ static int dpu_plane_check_inline_rotation(struct dpu_plane *pdpu,
 	return 0;
 }
 
+static int dpu_plane_atomic_check_pipe(struct dpu_plane *pdpu,
+		struct dpu_sw_pipe *pipe,
+		struct dpu_sw_pipe_cfg *pipe_cfg,
+		const struct dpu_format *fmt)
+{
+	uint32_t min_src_size;
+
+	min_src_size = DPU_FORMAT_IS_YUV(fmt) ? 2 : 1;
+
+	if (DPU_FORMAT_IS_YUV(fmt) &&
+	    (!(pipe->sspp->cap->features & DPU_SSPP_SCALER) ||
+	     !(pipe->sspp->cap->features & DPU_SSPP_CSC_ANY))) {
+		DPU_DEBUG_PLANE(pdpu,
+				"plane doesn't have scaler/csc for yuv\n");
+		return -EINVAL;
+	}
+
+	/* check src bounds */
+	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;
+	}
+
+	/* valid yuv image */
+	if (DPU_FORMAT_IS_YUV(fmt) &&
+	    (pipe_cfg->src_rect.x1 & 0x1 ||
+	     pipe_cfg->src_rect.y1 & 0x1 ||
+	     drm_rect_width(&pipe_cfg->src_rect) & 0x1 ||
+	     drm_rect_height(&pipe_cfg->src_rect) & 0x1)) {
+		DPU_DEBUG_PLANE(pdpu, "invalid yuv source " DRM_RECT_FMT "\n",
+				DRM_RECT_ARG(&pipe_cfg->src_rect));
+		return -EINVAL;
+	}
+
+	/* min dst support */
+	if (drm_rect_width(&pipe_cfg->dst_rect) < 0x1 ||
+	    drm_rect_height(&pipe_cfg->dst_rect) < 0x1) {
+		DPU_DEBUG_PLANE(pdpu, "invalid dest rect " DRM_RECT_FMT "\n",
+				DRM_RECT_ARG(&pipe_cfg->dst_rect));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int dpu_plane_atomic_check(struct drm_plane *plane,
 				  struct drm_atomic_state *state)
 {
@@ -916,7 +963,7 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 	const struct dpu_format *fmt;
 	struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg;
 	struct drm_rect fb_rect = { 0 };
-	uint32_t min_src_size, max_linewidth;
+	uint32_t max_linewidth;
 	unsigned int rotation;
 	uint32_t supported_rotations;
 	const struct dpu_sspp_cfg *pipe_hw_caps = pstate->pipe.sspp->cap;
@@ -971,47 +1018,19 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 
 	max_linewidth = pdpu->catalog->caps->max_linewidth;
 
-	fmt = to_dpu_format(msm_framebuffer_format(new_plane_state->fb));
-
-	min_src_size = DPU_FORMAT_IS_YUV(fmt) ? 2 : 1;
-
-	if (DPU_FORMAT_IS_YUV(fmt) &&
-		(!(pipe_hw_caps->features & DPU_SSPP_SCALER) ||
-		 !(pipe_hw_caps->features & DPU_SSPP_CSC_ANY))) {
-		DPU_DEBUG_PLANE(pdpu,
-				"plane doesn't have scaler/csc for yuv\n");
-		return -EINVAL;
-
-	/* check src bounds */
-	} 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;
-
-	/* valid yuv image */
-	} else if (DPU_FORMAT_IS_YUV(fmt) &&
-		   (pipe_cfg->src_rect.x1 & 0x1 || pipe_cfg->src_rect.y1 & 0x1 ||
-		    drm_rect_width(&pipe_cfg->src_rect) & 0x1 ||
-		    drm_rect_height(&pipe_cfg->src_rect) & 0x1)) {
-		DPU_DEBUG_PLANE(pdpu, "invalid yuv source " DRM_RECT_FMT "\n",
-				DRM_RECT_ARG(&pipe_cfg->src_rect));
-		return -EINVAL;
-
-	/* min dst support */
-	} else if (drm_rect_width(&pipe_cfg->dst_rect) < 0x1 ||
-		   drm_rect_height(&pipe_cfg->dst_rect) < 0x1) {
-		DPU_DEBUG_PLANE(pdpu, "invalid dest rect " DRM_RECT_FMT "\n",
-				DRM_RECT_ARG(&pipe_cfg->dst_rect));
-		return -EINVAL;
-
 	/* check decimated source width */
-	} else if (drm_rect_width(&pipe_cfg->src_rect) > max_linewidth) {
+	if (drm_rect_width(&pipe_cfg->src_rect) > max_linewidth) {
 		DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u\n",
 				DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
 		return -E2BIG;
 	}
 
+	fmt = to_dpu_format(msm_framebuffer_format(new_plane_state->fb));
+
+	ret = dpu_plane_atomic_check_pipe(pdpu, &pstate->pipe, pipe_cfg, fmt);
+	if (ret)
+		return ret;
+
 	supported_rotations = DRM_MODE_REFLECT_MASK | DRM_MODE_ROTATE_0;
 
 	if (pipe_hw_caps->features & BIT(DPU_SSPP_INLINE_ROTATION))