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From: Mans Rullgard <mans@mansr.com>
Date: Fri, 29 Aug 2008 01:45:26 +0000 (+0100)
Subject: OMAP: Enable overlay optimisation
X-Git-Url: http://git.mansr.com/?p=linux-omap;a=commitdiff_plain;h=7e052af7e4c73dc450412486ad37eb529e725dc7
OMAP: Enable overlay optimisation
This enables the overlay optimisation feature when the video
overlay is active. This reduces memory bandwidth used by the
display subsystem, improving overall performance.
Signed-off-by: Mans Rullgard <mans@mansr.com>
---
diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c
index 888d2c2..0f0b2e5 100644
--- a/drivers/video/omap/dispc.c
+++ b/drivers/video/omap/dispc.c
@@ -315,6 +315,60 @@ void omap_dispc_enable_digit_out(int enable)
}
EXPORT_SYMBOL(omap_dispc_enable_digit_out);
+#define MIN(a, b) ((a)<(b)?(a):(b))
+#define MAX(a, b) ((a)>(b)?(a):(b))
+
+static void setup_overlay_opt(void)
+{
+ struct fb_info **fbi = dispc.fbdev->fb_info;
+ struct omapfb_plane_struct *gfx, *vid;
+ struct fb_var_screeninfo *gvar;
+ unsigned gx, gx2, gy, gy2, gw, gh;
+ unsigned vx, vx2, vy, vy2, vw, vh;
+ unsigned bpp, skip;
+ static unsigned last_skip;
+
+ if (!fbi[0] || !fbi[1])
+ return;
+
+ gfx = fbi[0]->par;
+ vid = fbi[1]->par;
+ gvar = &fbi[0]->var;
+
+ gx = gfx->info.pos_x;
+ gy = gfx->info.pos_y;
+ gw = gfx->info.out_width;
+ gh = gfx->info.out_height;
+ vx = vid->info.pos_x;
+ vy = vid->info.pos_y;
+ vw = vid->info.out_width;
+ vh = vid->info.out_height;
+ gx2 = gx + gw;
+ gy2 = gy + gh;
+ vx2 = vx + vw;
+ vy2 = vy + vh;
+ bpp = gvar->bits_per_pixel / 8;
+
+ if (!gfx->info.enabled || !vid->info.enabled ||
+ dispc.color_key.key_type != OMAPFB_COLOR_KEY_DISABLED) {
+ skip = 0;
+ } else if (vx <= gx && vx2 >= gx2) {
+ unsigned y = MIN(gy2, vy2) - MAX(gy, vy);
+ skip = y * gvar->xres_virtual * bpp;
+ } else if (vx <= gx || vx2 >= gx2) {
+ unsigned x = MIN(gx2, vx2) - MAX(gx, vx);
+ skip = x * bpp;
+ } else {
+ skip = vw * bpp + 1;
+ }
+
+ if (skip != last_skip) {
+ last_skip = skip;
+ dispc_write_reg(DISPC_GFX_WINDOW_SKIP, skip);
+ MOD_REG_FLD(DISPC_CONTROL, 1<<12, !!skip<<12);
+ }
+}
+
static inline int _setup_plane(int plane, int channel_out,
u32 paddr, int screen_width,
int pos_x, int pos_y, int width, int height,
@@ -437,6 +491,9 @@ static inline int _setup_plane(int plane, int channel_out,
dispc_write_reg(ri_reg[plane], (screen_width - width) * bpp / 8 + 1);
+ if (plane < 2)
+ setup_overlay_opt();
+
MOD_REG_FLD(DISPC_CONTROL, 1<<5, 1<<5);
return height * screen_width * bpp / 8;
@@ -585,11 +642,19 @@ static int omap_dispc_enable_plane(int plane, int enable)
const u32 at_reg[] = { DISPC_GFX_ATTRIBUTES,
DISPC_VID1_BASE + DISPC_VID_ATTRIBUTES,
DISPC_VID2_BASE + DISPC_VID_ATTRIBUTES };
+ struct omapfb_plane_struct *pi;
+
if ((unsigned int)plane > dispc.mem_desc.region_cnt)
return -EINVAL;
+ pi = dispc.fbdev->fb_info[plane]->par;
+ pi->info.enabled = enable;
+
enable_lcd_clocks(1);
MOD_REG_FLD(at_reg[plane], 1, enable ? 1 : 0);
+ if (plane < 2)
+ setup_overlay_opt();
+ MOD_REG_FLD(DISPC_CONTROL, 1<<5, 1<<5);
enable_lcd_clocks(0);
return 0;
@@ -633,6 +698,7 @@ static int omap_dispc_set_color_key(struct omapfb_color_key *ck)
if (val != 0)
dispc_write_reg(tr_reg, ck->trans_key);
dispc_write_reg(df_reg, ck->background);
+ setup_overlay_opt();
enable_lcd_clocks(0);
dispc.color_key = *ck;
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