OMAP: DSS2: change manual update scaling setup

Currently the update area on manual update displays is automatically
enlargened to fully cover scaled overlays. This patch makes that
optional, allowing the panel driver to choose if it's used or not.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

1 files changed, 40 insertions, 29 deletions

diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index a1d84ef6590..4b09fcb432b 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -440,6 +440,10 @@ struct manager_cache_data {
 
 	/* manual update region */
 	u16 x, y, w, h;
+
+	/* enlarge the update area if the update area contains scaled
+	 * overlays */
+	bool enlarge_update_area;
 };
 
 static struct {
@@ -721,6 +725,7 @@ static int configure_overlay(enum omap_plane plane)
 	u16 x, y, w, h;
 	u32 paddr;
 	int r;
+	u16 orig_w, orig_h, orig_outw, orig_outh;
 
 	DSSDBGF("%d", plane);
 
@@ -741,8 +746,16 @@ static int configure_overlay(enum omap_plane plane)
 	outh = c->out_height == 0 ? c->height : c->out_height;
 	paddr = c->paddr;
 
+	orig_w = w;
+	orig_h = h;
+	orig_outw = outw;
+	orig_outh = outh;
+
 	if (c->manual_update && mc->do_manual_update) {
 		unsigned bpp;
+		unsigned scale_x_m = w, scale_x_d = outw;
+		unsigned scale_y_m = h, scale_y_d = outh;
+
 		/* If the overlay is outside the update region, disable it */
 		if (!rectangle_intersects(mc->x, mc->y, mc->w, mc->h,
 					x, y, outw, outh)) {
@@ -773,39 +786,33 @@ static int configure_overlay(enum omap_plane plane)
 			BUG();
 		}
 
-		if (dispc_is_overlay_scaled(c)) {
-			/* If the overlay is scaled, the update area has
-			 * already been enlarged to cover the whole overlay. We
-			 * only need to adjust x/y here */
-			x = c->pos_x - mc->x;
-			y = c->pos_y - mc->y;
+		if (mc->x > c->pos_x) {
+			x = 0;
+			outw -= (mc->x - c->pos_x);
+			paddr += (mc->x - c->pos_x) *
+				scale_x_m / scale_x_d * bpp / 8;
 		} else {
-			if (mc->x > c->pos_x) {
-				x = 0;
-				w -= (mc->x - c->pos_x);
-				paddr += (mc->x - c->pos_x) * bpp / 8;
-			} else {
-				x = c->pos_x - mc->x;
-			}
+			x = c->pos_x - mc->x;
+		}
 
-			if (mc->y > c->pos_y) {
-				y = 0;
-				h -= (mc->y - c->pos_y);
-				paddr += (mc->y - c->pos_y) * c->screen_width *
-					bpp / 8;
-			} else {
-				y = c->pos_y - mc->y;
-			}
+		if (mc->y > c->pos_y) {
+			y = 0;
+			outh -= (mc->y - c->pos_y);
+			paddr += (mc->y - c->pos_y) *
+				scale_y_m / scale_y_d *
+				c->screen_width * bpp / 8;
+		} else {
+			y = c->pos_y - mc->y;
+		}
 
-			if (mc->w < (x+w))
-				w -= (x+w) - (mc->w);
+		if (mc->w < (x + outw))
+			outw -= (x + outw) - (mc->w);
 
-			if (mc->h < (y+h))
-				h -= (y+h) - (mc->h);
+		if (mc->h < (y + outh))
+			outh -= (y + outh) - (mc->h);
 
-			outw = w;
-			outh = h;
-		}
+		w = w * outw / orig_outw;
+		h = h * outh / orig_outh;
 	}
 
 	r = dispc_setup_plane(plane,
@@ -963,7 +970,7 @@ static void make_even(u16 *x, u16 *w)
 /* Configure dispc for partial update. Return possibly modified update
  * area */
 void dss_setup_partial_planes(struct omap_dss_device *dssdev,
-		u16 *xi, u16 *yi, u16 *wi, u16 *hi)
+		u16 *xi, u16 *yi, u16 *wi, u16 *hi, bool enlarge_update_area)
 {
 	struct overlay_cache_data *oc;
 	struct manager_cache_data *mc;
@@ -1015,6 +1022,9 @@ void dss_setup_partial_planes(struct omap_dss_device *dssdev,
 
 			oc->dirty = true;
 
+			if (!enlarge_update_area)
+				continue;
+
 			if (!oc->enabled)
 				continue;
 
@@ -1074,6 +1084,7 @@ void dss_setup_partial_planes(struct omap_dss_device *dssdev,
 
 	mc = &dss_cache.manager_cache[mgr->id];
 	mc->do_manual_update = true;
+	mc->enlarge_update_area = enlarge_update_area;
 	mc->x = x;
 	mc->y = y;
 	mc->w = w;