drm/i915: Move display w/a #1175

Move the display w/a #1175 to a better place. That place
being the new skl+ specific plane->check() hook. This leaves
the skl_check_plane_surface() stuff to deal with the gtt offset
and src coordinate stuff as originally envisioned.
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180907152413.15761-12-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -2991,20 +2991,14 @@ static bool skl_check_main_ccs_coordinates(struct intel_plane_state *plane_state
 	return true;
 }
 
-static int skl_check_main_surface(const struct intel_crtc_state *crtc_state,
-				  struct intel_plane_state *plane_state)
+static int skl_check_main_surface(struct intel_plane_state *plane_state)
 {
-	struct drm_i915_private *dev_priv =
-		to_i915(plane_state->base.plane->dev);
 	const struct drm_framebuffer *fb = plane_state->base.fb;
 	unsigned int rotation = plane_state->base.rotation;
 	int x = plane_state->base.src.x1 >> 16;
 	int y = plane_state->base.src.y1 >> 16;
 	int w = drm_rect_width(&plane_state->base.src) >> 16;
 	int h = drm_rect_height(&plane_state->base.src) >> 16;
-	int dst_x = plane_state->base.dst.x1;
-	int dst_w = drm_rect_width(&plane_state->base.dst);
-	int pipe_src_w = crtc_state->pipe_src_w;
 	int max_width = skl_max_plane_width(fb, 0, rotation);
 	int max_height = 4096;
 	u32 alignment, offset, aux_offset = plane_state->color_plane[1].offset;
@@ -3015,24 +3009,6 @@ static int skl_check_main_surface(const struct intel_crtc_state *crtc_state,
 		return -EINVAL;
 	}
 
-	/*
-	 * Display WA #1175: cnl,glk
-	 * Planes other than the cursor may cause FIFO underflow and display
-	 * corruption if starting less than 4 pixels from the right edge of
-	 * the screen.
-	 * Besides the above WA fix the similar problem, where planes other
-	 * than the cursor ending less than 4 pixels from the left edge of the
-	 * screen may cause FIFO underflow and display corruption.
-	 */
-	if ((IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) &&
-	    (dst_x + dst_w < 4 || dst_x > pipe_src_w - 4)) {
-		DRM_DEBUG_KMS("requested plane X %s position %d invalid (valid range %d-%d)\n",
-			      dst_x + dst_w < 4 ? "end" : "start",
-			      dst_x + dst_w < 4 ? dst_x + dst_w : dst_x,
-			      4, pipe_src_w - 4);
-		return -ERANGE;
-	}
-
 	intel_add_fb_offsets(&x, &y, plane_state, 0);
 	offset = intel_plane_compute_aligned_offset(&x, &y, plane_state, 0);
 	alignment = intel_surf_alignment(fb, 0);
@@ -3093,8 +3069,7 @@ static int skl_check_main_surface(const struct intel_crtc_state *crtc_state,
 }
 
 static int
-skl_check_nv12_surface(const struct intel_crtc_state *crtc_state,
-		       struct intel_plane_state *plane_state)
+skl_check_nv12_surface(struct intel_plane_state *plane_state)
 {
 	/* Display WA #1106 */
 	if (plane_state->base.rotation !=
@@ -3165,8 +3140,7 @@ static int skl_check_ccs_aux_surface(struct intel_plane_state *plane_state)
 	return 0;
 }
 
-int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
-			    struct intel_plane_state *plane_state)
+int skl_check_plane_surface(struct intel_plane_state *plane_state)
 {
 	const struct drm_framebuffer *fb = plane_state->base.fb;
 	unsigned int rotation = plane_state->base.rotation;
@@ -3190,7 +3164,7 @@ int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
 	 * the main surface setup depends on it.
 	 */
 	if (fb->format->format == DRM_FORMAT_NV12) {
-		ret = skl_check_nv12_surface(crtc_state, plane_state);
+		ret = skl_check_nv12_surface(plane_state);
 		if (ret)
 			return ret;
 		ret = skl_check_nv12_aux_surface(plane_state);
@@ -3206,7 +3180,7 @@ int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
 		plane_state->color_plane[1].y = 0;
 	}
 
-	ret = skl_check_main_surface(crtc_state, plane_state);
+	ret = skl_check_main_surface(plane_state);
 	if (ret)
 		return ret;
 

drivers/gpu/drm/i915/intel_drv.h

@@ -1660,8 +1660,7 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
 u32 glk_color_ctl(const struct intel_plane_state *plane_state);
 u32 skl_plane_stride(const struct intel_plane_state *plane_state,
 		     int plane);
-int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
-			    struct intel_plane_state *plane_state);
+int skl_check_plane_surface(struct intel_plane_state *plane_state);
 int i9xx_check_plane_surface(struct intel_plane_state *plane_state);
 int skl_format_to_fourcc(int format, bool rgb_order, bool alpha);
 unsigned int i9xx_plane_max_stride(struct intel_plane *plane,

drivers/gpu/drm/i915/intel_sprite.c

@@ -1220,6 +1220,36 @@ static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
 	return 0;
 }
 
+static int skl_plane_check_dst_coordinates(const struct intel_crtc_state *crtc_state,
+					   const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_w = drm_rect_width(&plane_state->base.dst);
+	int pipe_src_w = crtc_state->pipe_src_w;
+
+	/*
+	 * Display WA #1175: cnl,glk
+	 * Planes other than the cursor may cause FIFO underflow and display
+	 * corruption if starting less than 4 pixels from the right edge of
+	 * the screen.
+	 * Besides the above WA fix the similar problem, where planes other
+	 * than the cursor ending less than 4 pixels from the left edge of the
+	 * screen may cause FIFO underflow and display corruption.
+	 */
+	if ((IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) &&
+	    (crtc_x + crtc_w < 4 || crtc_x > pipe_src_w - 4)) {
+		DRM_DEBUG_KMS("requested plane X %s position %d invalid (valid range %d-%d)\n",
+			      crtc_x + crtc_w < 4 ? "end" : "start",
+			      crtc_x + crtc_w < 4 ? crtc_x + crtc_w : crtc_x,
+			      4, pipe_src_w - 4);
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
 int skl_plane_check(struct intel_crtc_state *crtc_state,
 		    struct intel_plane_state *plane_state)
 {
@@ -1254,11 +1284,15 @@ int skl_plane_check(struct intel_crtc_state *crtc_state,
 	if (!plane_state->base.visible)
 		return 0;
 
+	ret = skl_plane_check_dst_coordinates(crtc_state, plane_state);
+	if (ret)
+		return ret;
+
 	ret = intel_plane_check_src_coordinates(plane_state);
 	if (ret)
 		return ret;
 
-	ret = skl_check_plane_surface(crtc_state, plane_state);
+	ret = skl_check_plane_surface(plane_state);
 	if (ret)
 		return ret;