drm/msm/dpu: remove unused dpu_plane_validate_multirect_v2 function

After cleaning up the older multirect support the function
dpu_plane_validate_multirect_v2() is unused. Lets remove it.
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
[DB: also drop struct dpu_multirect_plane_states and R0/R1/R_MAX]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/527348/
Link: https://lore.kernel.org/r/20230316161653.4106395-33-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -47,13 +47,6 @@
 #define DPU_PLANE_COLOR_FILL_FLAG	BIT(31)
 #define DPU_ZPOS_MAX 255
 
-/* multirect rect index */
-enum {
-	R0,
-	R1,
-	R_MAX
-};
-
 /*
  * Default Preload Values
  */
@@ -708,117 +701,6 @@ static void _dpu_plane_color_fill(struct dpu_plane *pdpu,
 					   fill_color, fmt);
 }
 
-int dpu_plane_validate_multirect_v2(struct dpu_multirect_plane_states *plane)
-{
-	struct dpu_plane_state *pstate[R_MAX];
-	const struct drm_plane_state *drm_state[R_MAX];
-	struct drm_rect src[R_MAX], dst[R_MAX];
-	struct dpu_plane *dpu_plane[R_MAX];
-	const struct dpu_format *fmt[R_MAX];
-	int i, buffer_lines;
-	unsigned int max_tile_height = 1;
-	bool parallel_fetch_qualified = true;
-	bool has_tiled_rect = false;
-
-	for (i = 0; i < R_MAX; i++) {
-		const struct msm_format *msm_fmt;
-
-		drm_state[i] = i ? plane->r1 : plane->r0;
-		msm_fmt = msm_framebuffer_format(drm_state[i]->fb);
-		fmt[i] = to_dpu_format(msm_fmt);
-
-		if (DPU_FORMAT_IS_UBWC(fmt[i])) {
-			has_tiled_rect = true;
-			if (fmt[i]->tile_height > max_tile_height)
-				max_tile_height = fmt[i]->tile_height;
-		}
-	}
-
-	for (i = 0; i < R_MAX; i++) {
-		int width_threshold;
-
-		pstate[i] = to_dpu_plane_state(drm_state[i]);
-		dpu_plane[i] = to_dpu_plane(drm_state[i]->plane);
-
-		if (pstate[i] == NULL) {
-			DPU_ERROR("DPU plane state of plane id %d is NULL\n",
-				drm_state[i]->plane->base.id);
-			return -EINVAL;
-		}
-
-		src[i].x1 = drm_state[i]->src_x >> 16;
-		src[i].y1 = drm_state[i]->src_y >> 16;
-		src[i].x2 = src[i].x1 + (drm_state[i]->src_w >> 16);
-		src[i].y2 = src[i].y1 + (drm_state[i]->src_h >> 16);
-
-		dst[i] = drm_plane_state_dest(drm_state[i]);
-
-		if (drm_rect_calc_hscale(&src[i], &dst[i], 1, 1) != 1 ||
-		    drm_rect_calc_vscale(&src[i], &dst[i], 1, 1) != 1) {
-			DPU_ERROR_PLANE(dpu_plane[i],
-				"scaling is not supported in multirect mode\n");
-			return -EINVAL;
-		}
-
-		if (DPU_FORMAT_IS_YUV(fmt[i])) {
-			DPU_ERROR_PLANE(dpu_plane[i],
-				"Unsupported format for multirect mode\n");
-			return -EINVAL;
-		}
-
-		/**
-		 * SSPP PD_MEM is split half - one for each RECT.
-		 * Tiled formats need 5 lines of buffering while fetching
-		 * whereas linear formats need only 2 lines.
-		 * So we cannot support more than half of the supported SSPP
-		 * width for tiled formats.
-		 */
-		width_threshold = dpu_plane[i]->catalog->caps->max_linewidth;
-		if (has_tiled_rect)
-			width_threshold /= 2;
-
-		if (parallel_fetch_qualified &&
-		    drm_rect_width(&src[i]) > width_threshold)
-			parallel_fetch_qualified = false;
-
-	}
-
-	/* Validate RECT's and set the mode */
-
-	/* Prefer PARALLEL FETCH Mode over TIME_MX Mode */
-	if (parallel_fetch_qualified) {
-		pstate[R0]->pipe.multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
-		pstate[R1]->pipe.multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
-
-		goto done;
-	}
-
-	/* TIME_MX Mode */
-	buffer_lines = 2 * max_tile_height;
-
-	if (dst[R1].y1 >= dst[R0].y2 + buffer_lines ||
-	    dst[R0].y1 >= dst[R1].y2 + buffer_lines) {
-		pstate[R0]->pipe.multirect_mode = DPU_SSPP_MULTIRECT_TIME_MX;
-		pstate[R1]->pipe.multirect_mode = DPU_SSPP_MULTIRECT_TIME_MX;
-	} else {
-		DPU_ERROR(
-			"No multirect mode possible for the planes (%d - %d)\n",
-			drm_state[R0]->plane->base.id,
-			drm_state[R1]->plane->base.id);
-		return -EINVAL;
-	}
-
-done:
-	pstate[R0]->pipe.multirect_index = DPU_SSPP_RECT_0;
-	pstate[R1]->pipe.multirect_index = DPU_SSPP_RECT_1;
-
-	DPU_DEBUG_PLANE(dpu_plane[R0], "R0: %d - %d\n",
-		pstate[R0]->pipe.multirect_mode, pstate[R0]->pipe.multirect_index);
-	DPU_DEBUG_PLANE(dpu_plane[R1], "R1: %d - %d\n",
-		pstate[R1]->pipe.multirect_mode, pstate[R1]->pipe.multirect_index);
-	return 0;
-}
-
 static int dpu_plane_prepare_fb(struct drm_plane *plane,
 		struct drm_plane_state *new_state)
 {

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

@@ -50,16 +50,6 @@ struct dpu_plane_state {
 	unsigned int rotation;
 };
 
-/**
- * struct dpu_multirect_plane_states: Defines multirect pair of drm plane states
- * @r0: drm plane configured on rect 0
- * @r1: drm plane configured on rect 1
- */
-struct dpu_multirect_plane_states {
-	const struct drm_plane_state *r0;
-	const struct drm_plane_state *r1;
-};
-
 #define to_dpu_plane_state(x) \
 	container_of(x, struct dpu_plane_state, base)
 
@@ -87,13 +77,6 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 		uint32_t pipe, enum drm_plane_type type,
 		unsigned long possible_crtcs);
 
-/**
- * dpu_plane_validate_multirecti_v2 - validate the multirect planes
- *				      against hw limitations
- * @plane: drm plate states of the multirect pair
- */
-int dpu_plane_validate_multirect_v2(struct dpu_multirect_plane_states *plane);
-
 /**
  * dpu_plane_color_fill - enables color fill on plane
  * @plane:  Pointer to DRM plane object