drm/i915: Make the PIPESRC rect relative to the entire bigjoiner area

When using bigjoiner it's useful to know the offset of each
individual pipe in the whole set of joined pipes. Let's include
that information in our PIPESRC rectangle. With this we can make
the plane clipping code blissfully unaware of bigjoiner usage, as
all we have to do is remove the pipe's offset from the final plane
destination coordinates.

v2: Use intel_bigjoiner_num_pipes()
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220223131315.18016-14-ville.syrjala@linux.intel.comReviewed-by: Manasi Navare <manasi.d.navare@intel.com>

drivers/gpu/drm/i915/display/intel_atomic_plane.c

@@ -823,10 +823,6 @@ int intel_atomic_plane_check_clipping(struct intel_plane_state *plane_state,
 		return -ERANGE;
 	}
 
-	/* right side of the image is on the slave crtc, adjust dst to match */
-	if (intel_crtc_is_bigjoiner_slave(crtc_state))
-		drm_rect_translate(dst, -drm_rect_width(&crtc_state->pipe_src), 0);
-
 	/*
 	 * FIXME: This might need further adjustment for seamless scaling
 	 * with phase information, for the 2p2 and 2p1 scenarios.
@@ -843,6 +839,9 @@ int intel_atomic_plane_check_clipping(struct intel_plane_state *plane_state,
 		return -EINVAL;
 	}
 
+	/* final plane coordinates will be relative to the plane's pipe */
+	drm_rect_translate(dst, -clip->x1, -clip->y1);
+
 	return 0;
 }
 

drivers/gpu/drm/i915/display/intel_cursor.c

@@ -152,9 +152,11 @@ static int intel_check_cursor(struct intel_crtc_state *crtc_state,
 	/* Use the unclipped src/dst rectangles, which we program to hw */
 	plane_state->uapi.src = src;
 	plane_state->uapi.dst = dst;
-	if (intel_crtc_is_bigjoiner_slave(crtc_state))
+
+	/* final plane coordinates will be relative to the plane's pipe */
 	drm_rect_translate(&plane_state->uapi.dst,
-				   -drm_rect_width(&crtc_state->pipe_src), 0);
+			   -crtc_state->pipe_src.x1,
+			   -crtc_state->pipe_src.y1);
 
 	ret = intel_cursor_check_surface(plane_state);
 	if (ret)

drivers/gpu/drm/i915/display/intel_display.c

@@ -3192,6 +3192,23 @@ static void intel_get_transcoder_timings(struct intel_crtc *crtc,
 	}
 }
 
+static void intel_bigjoiner_adjust_pipe_src(struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	int num_pipes = intel_bigjoiner_num_pipes(crtc_state);
+	enum pipe master_pipe, pipe = crtc->pipe;
+	int width;
+
+	if (num_pipes < 2)
+		return;
+
+	master_pipe = bigjoiner_master_pipe(crtc_state);
+	width = drm_rect_width(&crtc_state->pipe_src);
+
+	drm_rect_translate_to(&crtc_state->pipe_src,
+			      (pipe - master_pipe) * width, 0);
+}
+
 static void intel_get_pipe_src_size(struct intel_crtc *crtc,
 				    struct intel_crtc_state *pipe_config)
 {
@@ -3204,6 +3221,8 @@ static void intel_get_pipe_src_size(struct intel_crtc *crtc,
 	drm_rect_init(&pipe_config->pipe_src, 0, 0,
 		      REG_FIELD_GET(PIPESRC_WIDTH_MASK, tmp) + 1,
 		      REG_FIELD_GET(PIPESRC_HEIGHT_MASK, tmp) + 1);
+
+	intel_bigjoiner_adjust_pipe_src(pipe_config);
 }
 
 static void i9xx_set_pipeconf(const struct intel_crtc_state *crtc_state)
@@ -5838,6 +5857,8 @@ intel_modeset_pipe_config_late(struct intel_crtc_state *crtc_state)
 	struct drm_connector *connector;
 	int i;
 
+	intel_bigjoiner_adjust_pipe_src(crtc_state);
+
 	for_each_new_connector_in_state(&state->base, connector,
 					conn_state, i) {
 		struct intel_encoder *encoder =

drivers/gpu/drm/i915/display/intel_overlay.c

@@ -958,21 +958,21 @@ static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
 static int check_overlay_dst(struct intel_overlay *overlay,
 			     struct drm_intel_overlay_put_image *rec)
 {
-	const struct intel_crtc_state *pipe_config =
+	const struct intel_crtc_state *crtc_state =
 		overlay->crtc->config;
-	int pipe_src_w = drm_rect_width(&pipe_config->pipe_src);
-	int pipe_src_h = drm_rect_height(&pipe_config->pipe_src);
+	struct drm_rect req, clipped;
+
+	drm_rect_init(&req, rec->dst_x, rec->dst_y,
+		      rec->dst_width, rec->dst_height);
+
+	clipped = req;
+	drm_rect_intersect(&clipped, &crtc_state->pipe_src);
 
-	if (rec->dst_height == 0 || rec->dst_width == 0)
+	if (!drm_rect_visible(&clipped) ||
+	    !drm_rect_equals(&clipped, &req))
 		return -EINVAL;
 
-	if (rec->dst_x < pipe_src_w &&
-	    rec->dst_x + rec->dst_width <= pipe_src_w &&
-	    rec->dst_y < pipe_src_h &&
-	    rec->dst_y + rec->dst_height <= pipe_src_h)
 	return 0;
-	else
-		return -EINVAL;
 }
 
 static int check_overlay_scaling(struct drm_intel_overlay_put_image *rec)