rk27xx: Slightly refactor lcd_set_gram_area()

Change-Id: I1040164220dd87b19b58be560eb5b628857bc284

1 files changed, 11 insertions, 10 deletions

diff --git a/firmware/target/arm/rk27xx/ma/lcd-ma.c b/firmware/target/arm/rk27xx/ma/lcd-ma.c
index ad67352eb7..3c3d9fb097 100644
--- a/firmware/target/arm/rk27xx/ma/lcd-ma.c
+++ b/firmware/target/arm/rk27xx/ma/lcd-ma.c
@@ -151,21 +151,22 @@ void lcd_enable (bool on)
     LCDC_CTRL &= ~RGB24B;
 }
 
-void lcd_set_gram_area(int x, int y, int width, int height)
+void lcd_set_gram_area(int x_start, int y_start,
+                       int x_end, int y_end)
 {
     lcdctrl_bypass(1);
     LCDC_CTRL |= RGB24B;
 
     lcd_cmd(0x002A);
-    lcd_data((x&0xff00)>>8);
-    lcd_data(x&0x00ff);
-    lcd_data(((width-1)&0xff00)>>8);
-    lcd_data((width-1)&0x00ff);
+    lcd_data((x_start&0xff00)>>8);
+    lcd_data(x_start&0x00ff);
+    lcd_data((x_end&0xff00)>>8);
+    lcd_data(x_end&0x00ff);
     lcd_cmd(0x002B);
-    lcd_data((y&0xff00)>>8);
-    lcd_data(y&0x00ff);
-    lcd_data(((height-1)&0xff00)>>8);
-    lcd_data((height-1)&0x00ff);
+    lcd_data((y_start&0xff00)>>8);
+    lcd_data(y_start&0x00ff);
+    lcd_data((y_end&0xff00)>>8);
+    lcd_data(y_end&0x00ff);
 
     lcd_cmd(0x2c);
     LCDC_CTRL &= ~RGB24B;
@@ -176,7 +177,7 @@ void lcd_update_rect(int x, int y, int width, int height)
     int px = x, py = y;
     int pxmax = x + width, pymax = y + height;
 
-    lcd_set_gram_area(x, y, pxmax, pymax);
+    lcd_set_gram_area(x, y, pxmax-1, pymax-1);
 
     for (py = y; py < pymax; py++)
         for (px = x; px < pxmax; px++)