drm/i915: adjust sprite base address

Just like in:

commit c2c75131
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 5 12:17:30 2012 +0200

    drm/i915: adjust framebuffer base address on gen4+

but this time, for the sprite planes. This ensures that the
sprite offset are always inside the supported hardware limits since it
becomes the offset into a page and we adjust the base address to a page
boundary.
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -1955,9 +1955,9 @@ void intel_unpin_fb_obj(struct drm_i915_gem_object *obj)
 
 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
  * is assumed to be a power-of-two. */
-static unsigned long gen4_compute_dspaddr_offset_xtiled(int *x, int *y,
-							unsigned int bpp,
-							unsigned int pitch)
+unsigned long intel_gen4_compute_offset_xtiled(int *x, int *y,
+					       unsigned int bpp,
+					       unsigned int pitch)
 {
 	int tile_rows, tiles;
 
@@ -2029,9 +2029,9 @@ static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 
 	if (INTEL_INFO(dev)->gen >= 4) {
 		intel_crtc->dspaddr_offset =
-			gen4_compute_dspaddr_offset_xtiled(&x, &y,
-							   fb->bits_per_pixel / 8,
-							   fb->pitches[0]);
+			intel_gen4_compute_offset_xtiled(&x, &y,
+							 fb->bits_per_pixel / 8,
+							 fb->pitches[0]);
 		linear_offset -= intel_crtc->dspaddr_offset;
 	} else {
 		intel_crtc->dspaddr_offset = linear_offset;
@@ -2118,9 +2118,9 @@ static int ironlake_update_plane(struct drm_crtc *crtc,
 
 	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
 	intel_crtc->dspaddr_offset =
-		gen4_compute_dspaddr_offset_xtiled(&x, &y,
-						   fb->bits_per_pixel / 8,
-						   fb->pitches[0]);
+		intel_gen4_compute_offset_xtiled(&x, &y,
+						 fb->bits_per_pixel / 8,
+						 fb->pitches[0]);
 	linear_offset -= intel_crtc->dspaddr_offset;
 
 	DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",

drivers/gpu/drm/i915/intel_drv.h

@@ -585,6 +585,10 @@ extern void intel_update_sprite_watermarks(struct drm_device *dev, int pipe,
 extern void intel_update_linetime_watermarks(struct drm_device *dev, int pipe,
 			 struct drm_display_mode *mode);
 
+extern unsigned long intel_gen4_compute_offset_xtiled(int *x, int *y,
+						      unsigned int bpp,
+						      unsigned int pitch);
+
 extern int intel_sprite_set_colorkey(struct drm_device *dev, void *data,
 				     struct drm_file *file_priv);
 extern int intel_sprite_get_colorkey(struct drm_device *dev, void *data,

drivers/gpu/drm/i915/intel_sprite.c

@@ -49,6 +49,7 @@ ivb_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,
 	int pipe = intel_plane->pipe;
 	u32 sprctl, sprscale = 0;
 	int pixel_size;
+	unsigned long sprsurf_offset, linear_offset;
 
 	sprctl = I915_READ(SPRCTL(pipe));
 
@@ -128,24 +129,27 @@ ivb_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,
 	I915_WRITE(SPRSTRIDE(pipe), fb->pitches[0]);
 	I915_WRITE(SPRPOS(pipe), (crtc_y << 16) | crtc_x);
 
-	if (IS_HASWELL(dev)) {
-		/* HSW consolidates SPRTILEOFF and SPRLINOFF into a single
-		 * SPROFFSET register */
+	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
+	sprsurf_offset =
+		intel_gen4_compute_offset_xtiled(&x, &y,
+						 fb->bits_per_pixel / 8,
+						 fb->pitches[0]);
+	linear_offset -= sprsurf_offset;
+
+	/* HSW consolidates SPRTILEOFF and SPRLINOFF into a single SPROFFSET
+	 * register */
+	if (IS_HASWELL(dev))
 		I915_WRITE(SPROFFSET(pipe), (y << 16) | x);
-	} else if (obj->tiling_mode != I915_TILING_NONE) {
+	else if (obj->tiling_mode != I915_TILING_NONE)
 		I915_WRITE(SPRTILEOFF(pipe), (y << 16) | x);
-	} else {
-		unsigned long offset;
-
-		offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
-		I915_WRITE(SPRLINOFF(pipe), offset);
-	}
+	else
+		I915_WRITE(SPRLINOFF(pipe), linear_offset);
 
 	I915_WRITE(SPRSIZE(pipe), (crtc_h << 16) | crtc_w);
 	if (intel_plane->can_scale)
 		I915_WRITE(SPRSCALE(pipe), sprscale);
 	I915_WRITE(SPRCTL(pipe), sprctl);
-	I915_MODIFY_DISPBASE(SPRSURF(pipe), obj->gtt_offset);
+	I915_MODIFY_DISPBASE(SPRSURF(pipe), obj->gtt_offset + sprsurf_offset);
 	POSTING_READ(SPRSURF(pipe));
 }
 
@@ -234,6 +238,7 @@ ilk_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(plane);
 	int pipe = intel_plane->pipe, pixel_size;
+	unsigned long dvssurf_offset, linear_offset;
 	u32 dvscntr, dvsscale;
 
 	dvscntr = I915_READ(DVSCNTR(pipe));
@@ -297,18 +302,23 @@ ilk_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,
 
 	I915_WRITE(DVSSTRIDE(pipe), fb->pitches[0]);
 	I915_WRITE(DVSPOS(pipe), (crtc_y << 16) | crtc_x);
-	if (obj->tiling_mode != I915_TILING_NONE) {
+
+	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
+	dvssurf_offset =
+		intel_gen4_compute_offset_xtiled(&x, &y,
+						 fb->bits_per_pixel / 8,
+						 fb->pitches[0]);
+	linear_offset -= dvssurf_offset;
+
+	if (obj->tiling_mode != I915_TILING_NONE)
 		I915_WRITE(DVSTILEOFF(pipe), (y << 16) | x);
-	} else {
-		unsigned long offset;
+	else
+		I915_WRITE(DVSLINOFF(pipe), linear_offset);
 
-		offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
-		I915_WRITE(DVSLINOFF(pipe), offset);
-	}
 	I915_WRITE(DVSSIZE(pipe), (crtc_h << 16) | crtc_w);
 	I915_WRITE(DVSSCALE(pipe), dvsscale);
 	I915_WRITE(DVSCNTR(pipe), dvscntr);
-	I915_MODIFY_DISPBASE(DVSSURF(pipe), obj->gtt_offset);
+	I915_MODIFY_DISPBASE(DVSSURF(pipe), obj->gtt_offset + dvssurf_offset);
 	POSTING_READ(DVSSURF(pipe));
 }