Greyscale library: Optionally put the greyscale ISR on COP on portalplayertargets (only use with the grey_info structure in IRAM atm\!). This speeds up doom by ~50%, and makes mpegplayer work without stuttering audio on targets using it (measured on iPod 2nd Gen and Mini 2nd Gen). It needs corelocking certain functions in the LCD driver on 1st/2nd Gen.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16973 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/doom/i_video.c

@@ -696,7 +696,7 @@ void I_InitGraphics(void)
 
 #ifndef HAVE_LCD_COLOR
    gbuf=malloc(GREYBUFSIZE);
-   grey_init(rb, gbuf, GREYBUFSIZE, 0, LCD_WIDTH, LCD_HEIGHT, NULL);
+   grey_init(rb, gbuf, GREYBUFSIZE, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL);
    /* switch on greyscale overlay */
    grey_show(true);
 #endif

apps/plugins/lib/grey.h

@@ -45,8 +45,10 @@
 #define GREY_INFO_STRUCT_IRAM struct _grey_info _grey_info IBSS_ATTR;
 
 /* Features you can request on library init (ORed together): */
-#define GREY_BUFFERED  0x0001
-#define GREY_RAWMAPPED 0x0002
+#define GREY_BUFFERED  0x0001  /* Use a chunky buffer */
+#define GREY_RAWMAPPED 0x0002  /* No gamma & LCD linearisation */
+#define GREY_ON_COP    0x0004  /* Run ISR on COP (PP targets) */
+        /* TODO: only usable in conjunction with GREY_INFO_STRUCT_IRAM atm */
 
 /* Library initialisation and release */
 bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,

apps/plugins/lib/grey_core.c

@@ -495,11 +495,12 @@ bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
 #endif
 
     plane_size = _GREY_MULUQ(width, height);
-#ifdef CPU_COLDFIRE
-    plane_size += (-plane_size) & 0xf; /* All buffers should be line aligned */
+#if defined(CPU_COLDFIRE)              /* Buffers should be line aligned */  \
+ || defined(CPU_PP) && (NUM_CORES > 1) /* Buffers must be cache line aligned */
+    plane_size += (-plane_size) & 0xf;
     buftaken    = (-(long)gbuf) & 0xf;
-#else
-    buftaken    = (-(long)gbuf) & 3;   /* All buffers must be long aligned. */
+#else                                  /* Buffers must be 32 bit aligned. */
+    buftaken    = (-(long)gbuf) & 3;   
 #endif
     gbuf += buftaken;
 
@@ -509,6 +510,10 @@ bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
         gbuf     += plane_size;
         buftaken += plane_size;
     }
+#if NUM_CORES > 1  /* Values and phases must be uncached when running on COP */
+    if (features & GREY_ON_COP)
+        gbuf = UNCACHED_ADDR(gbuf);
+#endif
     _grey_info.values = gbuf;
     gbuf += plane_size;
     _grey_info.phases = gbuf;
@@ -602,8 +607,14 @@ void grey_show(bool enable)
 #ifdef NEED_BOOST
         _grey_info.rb->cpu_boost(true);
 #endif
+#if NUM_CORES > 1
+        _grey_info.rb->timer_register(1, NULL, TIMER_FREQ / LCD_SCANRATE,
+                                      1, _timer_isr,
+                                      (_grey_info.flags & GREY_ON_COP) ? COP : CPU);
+#else
         _grey_info.rb->timer_register(1, NULL, TIMER_FREQ / LCD_SCANRATE, 1,
-                                      _timer_isr IF_COP(, CPU));
+                                      _timer_isr);
+#endif
 #endif /* !SIMULATOR */
         _grey_info.rb->screen_dump_set_hook(grey_screendump_hook);
     }

apps/plugins/mpegplayer/stream_mgr.c

@@ -1005,7 +1005,7 @@ int stream_init(void)
     graymem = mem;
 #endif
 
-    success = grey_init(rb, graymem, memsize, GREY_BUFFERED,
+    success = grey_init(rb, graymem, memsize, GREY_BUFFERED|GREY_ON_COP,
                         LCD_WIDTH, LCD_HEIGHT, &graysize);
 
     /* This can run on another processor - align size */

apps/plugins/test_fps.c

@@ -286,7 +286,7 @@ static void time_greyscale(void)
     int fps, load;
 
     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
-    if (!grey_init(rb, gbuf, gbuf_size, 0, LCD_WIDTH, LCD_HEIGHT, NULL))
+    if (!grey_init(rb, gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL))
     {
         log_text("greylib: out of memory.");
         return;

apps/plugins/zxbox/zxbox.c

@@ -74,9 +74,10 @@ enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
     /* get the remainder of the plugin buffer */
     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
 #ifdef USE_BUFFERED_GREY
-    grey_init(rb, gbuf, gbuf_size, GREY_BUFFERED, LCD_WIDTH, LCD_HEIGHT, NULL);
+    grey_init(rb, gbuf, gbuf_size, GREY_BUFFERED|GREY_ON_COP, LCD_WIDTH,
+              LCD_HEIGHT, NULL);
 #else
-    grey_init(rb, gbuf, gbuf_size, 0, LCD_WIDTH, LCD_HEIGHT, NULL);
+    grey_init(rb, gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL);
 #endif /* USE_BUFFERED_GREY */
     /* switch on greyscale overlay */
     grey_show(true);

firmware/target/arm/ipod/lcd-gray.c

@@ -53,6 +53,10 @@
 /* The backlight makes the LCD appear negative on the 1st/2nd gen */
 static bool lcd_inverted = false;
 static bool lcd_backlit = false;
+#if NUM_CORES > 1
+/* invert_display() and the lcd_blit_* functions need to be corelocked */
+static struct corelock cl IBSS_ATTR;
+#endif
 static void invert_display(void);
 #endif
 
@@ -112,7 +116,9 @@ static void lcd_cmd_and_data(unsigned cmd, unsigned data)
 /* LCD init */
 void lcd_init_device(void)
 {
-
+#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
+    corelock_init(&cl);
+#endif
 #ifdef IPOD_MINI2G /* serial LCD hookup */
     lcd_wait_write();
     LCD1_CONTROL = 0x01730084; /* fastest setting */
@@ -167,7 +173,13 @@ static void invert_display(void)
     if (new_invert != last_invert)
     {
         int oldlevel = disable_irq_save();
+#if NUM_CORES > 1
+        corelock_lock(&cl);
         lcd_cmd_and_data(R_DISPLAY_CONTROL, new_invert? 0x0017 : 0x0015);
+        corelock_unlock(&cl);
+#else
+        lcd_cmd_and_data(R_DISPLAY_CONTROL, new_invert? 0x0017 : 0x0015);
+#endif
         restore_irq(oldlevel);
         last_invert = new_invert;
     }
@@ -254,14 +266,19 @@ void lcd_mono_data(const unsigned char *data, int count);
 void lcd_blit_mono(const unsigned char *data, int bx, int y, int bwidth,
                    int height, int stride)
 {
+#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
+    corelock_lock(&cl);
+#endif
     while (height--)
     {
         lcd_cmd_and_data(R_RAM_ADDR_SET, (y++ << 5) + addr_offset - bx);
         lcd_prepare_cmd(R_RAM_DATA);
-
         lcd_mono_data(data, bwidth);
         data += stride;
     }
+#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
+    corelock_unlock(&cl);
+#endif
 }
 
 /* Helper function for lcd_grey_phase_blit(). */
@@ -272,15 +289,20 @@ void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
                          int bx, int y, int bwidth, int height, int stride)
 {
+#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
+    corelock_lock(&cl);
+#endif
     while (height--)
     {
         lcd_cmd_and_data(R_RAM_ADDR_SET, (y++ << 5) + addr_offset - bx);
         lcd_prepare_cmd(R_RAM_DATA);
-
         lcd_grey_data(values, phases, bwidth);
         values += stride;
         phases += stride;
     }
+#if (NUM_CORES > 1) && defined(HAVE_BACKLIGHT_INVERSION)
+    corelock_unlock(&cl);
+#endif
 }
 
 void lcd_update_rect(int x, int y, int width, int height)