firmware: add color bar pattern

timvideos · Sep 1, 2015 · 4a8c4a2 · 4a8c4a2
1 parent e025fa0
commit 4a8c4a2
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Showing 4 changed files with 60 additions and 5 deletions.
diff --git a/firmware/lm32/pattern.c b/firmware/lm32/pattern.c
@@ -16,12 +16,37 @@ unsigned int pattern_framebuffer_base(void) {
 	return PATTERN_FRAMEBUFFER_BASE;
 }
 
-void pattern_fill_framebuffer(void)
+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<PATTERN_FRAMEBUFFER_SIZE/4; i++) {
-			framebuffer[i] = 0xf0296e29; /* blue in YCbCr 4:2:2 */
+	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;
+		}
 	}
 }
diff --git a/firmware/lm32/pattern.h b/firmware/lm32/pattern.h
@@ -3,6 +3,6 @@
 
 unsigned int pattern_framebuffer_base(void);
 
-void pattern_fill_framebuffer(void);
+void pattern_fill_framebuffer(int h_active, int m_active);
 
 #endif /* __PATTERN_H */
diff --git a/firmware/lm32/pattern.py b/firmware/lm32/pattern.py
@@ -0,0 +1,30 @@
+def rgb2ycbcr(r, g, b):
+    y = int(0.299*r + 0.587*g + 0.114*b)
+    cb = int(-0.1687*r - 0.3313*g + 0.5*b + 128)
+    cr = int(0.5*r - 0.4187*g - 0.0813*b + 128)
+    return y, cb, cr
+
+color_bars_rgb = [
+    [255, 255, 255],
+    [255, 255,   0],
+    [0,   255, 255],
+    [0,   255,   0],
+    [255,   0, 255],
+    [255,   0,   0],
+    [0,     0, 255],
+    [0,     0,   0],
+]
+
+color_bars_ycbcr = []
+for color_bar_rgb in color_bars_rgb:
+    r, g, b = color_bar_rgb
+    y, cb, cr = rgb2ycbcr(r, g, b)
+    color_bars_ycbcr.append([y, cb, cr])
+
+for color_bar_ycbcr in color_bars_ycbcr:
+    y, cb, cr = color_bar_ycbcr
+    value  = y
+    value |= cr << 8
+    value |= y  << 16
+    value |= cb << 24
+    print("%08x" %value)
diff --git a/firmware/lm32/processor.c b/firmware/lm32/processor.c
@@ -287,7 +287,7 @@ void processor_start(int mode)
 	hdmi_in1_disable();
 	hdmi_in0_clear_framebuffers();
 	hdmi_in1_clear_framebuffers();
-	pattern_fill_framebuffer();
+	pattern_fill_framebuffer(m->h_active, m->v_active);
 
 	pll_config_for_clock(m->pixel_clock);
 	fb_set_mode(m);