From: Siarhei Siamashka Date: Thu, 9 Oct 2008 09:52:14 +0000 (+0300) Subject: FB: OMAP: Blizzard: Properly disable zoom when necessary X-Git-Tag: v2.6.27-omap1~49 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=73422a657df7ea16a6635a8ef80d257d561d188c;p=linux-2.6-omap-h63xx.git FB: OMAP: Blizzard: Properly disable zoom when necessary The problem is related to the following notice in the documentation: "Once a destructive window with up-scaling is created, it can only be disabled by creating a background window.". With the current omapfb driver code, if you try to do a partial screen update (show menu or dialog) after a scaled screen update (video overlay), scaling setting are not reset properly and you see this "magnifying glass" effect if a part of new update overlaps previously scaled area. Signed-off-by: Siarhei Siamashka Signed-off-by: Daniel Stone Signed-off-by: Tony Lindgren --- diff --git a/drivers/video/omap/blizzard.c b/drivers/video/omap/blizzard.c index 6031b89573b..f60a2338ef9 100644 --- a/drivers/video/omap/blizzard.c +++ b/drivers/video/omap/blizzard.c @@ -163,6 +163,10 @@ struct blizzard_struct { int vid_scaled; int last_color_mode; int zoom_on; + int zoom_area_gx1; + int zoom_area_gx2; + int zoom_area_gy1; + int zoom_area_gy2; int screen_width; int screen_height; unsigned te_connected:1; @@ -514,6 +518,12 @@ static int do_full_screen_update(struct blizzard_request *req) return REQ_PENDING; } +static int check_1d_intersect(int a1, int a2, int b1, int b2) +{ + if (a2 <= b1 || b2 <= a1) return 0; + return 1; +} + /* Setup all planes with an overlapping area with the update window. */ static int do_partial_update(struct blizzard_request *req, int plane, int x, int y, int w, int h, @@ -526,6 +536,7 @@ static int do_partial_update(struct blizzard_request *req, int plane, int color_mode; int flags; int zoom_off; + int have_zoom_for_this_update = 0; /* Global coordinates, relative to pixel 0,0 of the LCD */ gx1 = x + blizzard.plane[plane].pos_x; @@ -545,10 +556,6 @@ static int do_partial_update(struct blizzard_request *req, int plane, gx2_out = gx1_out + w_out; gy2_out = gy1_out + h_out; } - zoom_off = blizzard.zoom_on && gx1 == 0 && gy1 == 0 && - w == blizzard.screen_width && h == blizzard.screen_height; - blizzard.zoom_on = (!zoom_off && blizzard.zoom_on) || - (w < w_out || h < h_out); for (i = 0; i < OMAPFB_PLANE_NUM; i++) { struct plane_info *p = &blizzard.plane[i]; @@ -654,8 +661,49 @@ static int do_partial_update(struct blizzard_request *req, int plane, else disable_tearsync(); + if ((gx2_out - gx1_out) != (gx2 - gx1) || + (gy2_out - gy1_out) != (gy2 - gy1)) + have_zoom_for_this_update = 1; + + /* 'background' type of screen update (as opposed to 'destructive') + can be used to disable scaling if scaling is active */ + zoom_off = blizzard.zoom_on && !have_zoom_for_this_update && + (gx1_out == 0) && (gx2_out == blizzard.screen_width) && + (gy1_out == 0) && (gy2_out == blizzard.screen_height) && + (gx1 == 0) && (gy1 == 0); + + if (blizzard.zoom_on && !have_zoom_for_this_update && !zoom_off && + check_1d_intersect(blizzard.zoom_area_gx1, blizzard.zoom_area_gx2, + gx1_out, gx2_out) && + check_1d_intersect(blizzard.zoom_area_gy1, blizzard.zoom_area_gy2, + gy1_out, gy2_out)) { + /* Previous screen update was using scaling, current update + * is not using it. Additionally, current screen update is + * going to overlap with the scaled area. Scaling needs to be + * disabled in order to avoid 'magnifying glass' effect. + * Dummy setup of background window can be used for this. + */ + set_window_regs(0, 0, blizzard.screen_width, + blizzard.screen_height, + 0, 0, blizzard.screen_width, + blizzard.screen_height, + BLIZZARD_COLOR_RGB565, 1, flags); + blizzard.zoom_on = 0; + } + + /* remember scaling settings if we have scaled update */ + if (have_zoom_for_this_update) { + blizzard.zoom_on = 1; + blizzard.zoom_area_gx1 = gx1_out; + blizzard.zoom_area_gx2 = gx2_out; + blizzard.zoom_area_gy1 = gy1_out; + blizzard.zoom_area_gy2 = gy2_out; + } + set_window_regs(gx1, gy1, gx2, gy2, gx1_out, gy1_out, gx2_out, gy2_out, color_mode, zoom_off, flags); + if (zoom_off) + blizzard.zoom_on = 0; blizzard.extif->set_bits_per_cycle(16); /* set_window_regs has left the register index at the right