firmware: simplify pattern generation

timvideos · Sep 1, 2015 · 17f2d10 · 17f2d10
1 parent 4a8c4a2
commit 17f2d10
Showing 1 changed file with 21 additions and 26 deletions.
diff --git a/firmware/lm32/pattern.c b/firmware/lm32/pattern.c
@@ -5,48 +5,43 @@
 #include <generated/mem.h>
 #include <hw/flags.h>
 #include <system.h>
-#include <time.h>
 
 #include "pattern.h"
 
 #define PATTERN_FRAMEBUFFER_BASE 0x02000000
-#define PATTERN_FRAMEBUFFER_SIZE 1280*720*2
 
 unsigned int pattern_framebuffer_base(void) {
 	return PATTERN_FRAMEBUFFER_BASE;
 }
 
+/* DRAM content in YCbCr 4:2:2, from pattern.py */
+static const unsigned int color_bar[8] = {
+	0x80ff80ff,
+	0x00e194e1,
+	0xabb200b2,
+	0x2b951595,
+	0xd469e969,
+	0x544cff4c,
+	0xff1d6f1d,
+	0x80108010
+};
+
+static int inc_color(int color) {
+	color++;
+	return color%8;
+}
+
 void pattern_fill_framebuffer(int h_active, int m_active)
 {
 	int i;
-	int change_color;
 	int color;
 	flush_l2_cache();
 	color = -1;
 	volatile unsigned int *framebuffer = (unsigned int *)(MAIN_RAM_BASE + PATTERN_FRAMEBUFFER_BASE);
 	for(i=0; i<h_active*m_active*2/4; i++) {
-		change_color = i%(h_active/16) == 0;
-		if(change_color)
-			color++;
-		color = color%8;
-		switch(color) {
-			case 0:
-				framebuffer[i] = 0x80ff80ff; break;
-			case 1:
-				framebuffer[i] = 0x00e194e1; break;
-			case 2:
-				framebuffer[i] = 0xabb200b2; break;
-			case 3:
-				framebuffer[i] = 0x2b951595; break;
-			case 4:
-				framebuffer[i] = 0xd469e969; break;
-			case 5:
-				framebuffer[i] = 0x544cff4c; break;
-			case 6:
-				framebuffer[i] = 0xff1d6f1d; break;
-			case 7:
-				framebuffer[i] = 0x80108010;
-				break;
-		}
+		if(i%(h_active/16) == 0)
+			inc_color(color);
+		if(color > 0)
+			framebuffer[i] = color_bar[color];
 	}
 }