5 files changed, 48 insertions, 34 deletions

diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c
index 2a91d5662c07..6848e3633ed9 100644
--- a/drivers/video/omap2/displays/panel-taal.c
+++ b/drivers/video/omap2/displays/panel-taal.c
@@ -1135,7 +1135,7 @@ static int taal_update(struct omap_dss_device *dssdev,
                 goto err;
         }
 
-        r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h);
+        r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h, true);
         if (r)
                 goto err;
 
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 32297b4f7abb..d0881e948bcf 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -2860,7 +2860,8 @@ static void dsi_framedone_irq_callback(void *data, u32 mask)
 }
 
 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
-                                    u16 *x, u16 *y, u16 *w, u16 *h)
+                                    u16 *x, u16 *y, u16 *w, u16 *h,
+                                    bool enlarge_update_area)
 {
         u16 dw, dh;
 
@@ -2884,7 +2885,8 @@ int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
         dsi_perf_mark_setup();
 
         if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
-                dss_setup_partial_planes(dssdev, x, y, w, h);
+                dss_setup_partial_planes(dssdev, x, y, w, h,
+                                enlarge_update_area);
                 dispc_set_lcd_size(*w, *h);
         }
 
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 66e8e97d06a7..5c7940d5f282 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -199,7 +199,8 @@ int dss_init_overlay_managers(struct platform_device *pdev);
 void dss_uninit_overlay_managers(struct platform_device *pdev);
 int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl);
 void dss_setup_partial_planes(struct omap_dss_device *dssdev,
-                                u16 *x, u16 *y, u16 *w, u16 *h);
+                                u16 *x, u16 *y, u16 *w, u16 *h,
+                                bool enlarge_update_area);
 void dss_start_update(struct omap_dss_device *dssdev);
 
 /* overlay */
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index a1d84ef65904..4b09fcb432b3 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;
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index cc23f53cc62d..bbe62464e92d 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -886,7 +886,7 @@ int omap_rfbi_prepare_update(struct omap_dss_device *dssdev,
                 return -EINVAL;
 
         if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
-                dss_setup_partial_planes(dssdev, x, y, w, h);
+                dss_setup_partial_planes(dssdev, x, y, w, h, true);
                 dispc_set_lcd_size(*w, *h);
         }