Fix wrong display in console driver

kernel/src/arch/aarch64/board/raspi3/mod.rs

@@ -78,5 +78,10 @@ pub fn probe_fb_info(width: u32, height: u32, depth: u32) -> FramebufferResult {
         ))?;
     }
 
-    Ok((info, fb::ColorConfig::BGRA8888, vaddr))
+    let color_config = match info.depth {
+        16 => ColorConfig::RGB565,
+        32 => ColorConfig::BGRA8888,
+        _ => Err(format!("unsupported color depth {}", info.depth))?,
+    };
+    Ok((info, color_config, vaddr))
 }

kernel/src/drivers/console/mod.rs

@@ -28,7 +28,7 @@ pub struct ConsoleChar {
 impl Default for ConsoleChar {
     fn default() -> Self {
         ConsoleChar {
-            ascii_char: 0,
+            ascii_char: b' ',
             attr: CharacterAttribute::default(),
         }
     }
@@ -152,7 +152,7 @@ impl<F: Font> Console<F> {
 
     fn new_line(&mut self) {
         let attr_blank = ConsoleChar {
-            ascii_char: 0,
+            ascii_char: b' ',
             attr: self.parser.char_attribute(),
         };
         for j in self.col..self.buf.num_col {

kernel/src/util/escape_parser.rs

@@ -156,8 +156,12 @@ impl EscapeParser {
                     }
                     let csi = CSI::new(byte, &self.params);
                     if csi == CSI::SGR {
-                        for &param in self.params.iter() {
+                        if self.params.is_empty() {
-                            self.char_attr.apply_sgr(param);
+                            self.char_attr.apply_sgr(0);
+                        } else {
+                            for &param in self.params.iter() {
+                                self.char_attr.apply_sgr(param);
+                            }
                         }
                     }
                     self.status = ParseStatus::Text;