video: fbdev: mx3fb: Fix kernel-doc, set but not used and string warn…

…ings

Fix W=1 warnings:
- Fix kernel-doc
- Drop unused code/variables
- Use memcpy to copy a string without zero-termination
  strncpy() generates a warning

v2:
  - Updated subject (Lee)

Signed-off-by: Sam Ravnborg <[email protected]>
Acked-by: Thomas Zimmermann <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Xiaofei Tan <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Lee Jones <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

drivers/video/fbdev/mx3fb.c

@@ -445,15 +445,14 @@ static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
 static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
 {
 	struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
-	uint32_t enabled;
 	unsigned long flags;
 
 	if (mx3_fbi->txd == NULL)
 		return;
 
 	spin_lock_irqsave(&mx3fb->lock, flags);
 
-	enabled = sdc_fb_uninit(mx3_fbi);
+	sdc_fb_uninit(mx3_fbi);
 
 	spin_unlock_irqrestore(&mx3fb->lock, flags);
 
@@ -732,15 +731,15 @@ static int mx3fb_unmap_video_memory(struct fb_info *fbi);
 
 /**
  * mx3fb_set_fix() - set fixed framebuffer parameters from variable settings.
- * @info:	framebuffer information pointer
+ * @fbi:	framebuffer information pointer
  * @return:	0 on success or negative error code on failure.
  */
 static int mx3fb_set_fix(struct fb_info *fbi)
 {
 	struct fb_fix_screeninfo *fix = &fbi->fix;
 	struct fb_var_screeninfo *var = &fbi->var;
 
-	strncpy(fix->id, "DISP3 BG", 8);
+	memcpy(fix->id, "DISP3 BG", 8);
 
 	fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 
@@ -1105,6 +1104,8 @@ static void __blank(int blank, struct fb_info *fbi)
 
 /**
  * mx3fb_blank() - blank the display.
+ * @blank:	blank value for the panel
+ * @fbi:	framebuffer information pointer
  */
 static int mx3fb_blank(int blank, struct fb_info *fbi)
 {
@@ -1126,7 +1127,7 @@ static int mx3fb_blank(int blank, struct fb_info *fbi)
 /**
  * mx3fb_pan_display() - pan or wrap the display
  * @var:	variable screen buffer information.
- * @info:	framebuffer information pointer.
+ * @fbi:	framebuffer information pointer.
  *
  * We look only at xoffset, yoffset and the FB_VMODE_YWRAP flag
  */
@@ -1387,6 +1388,8 @@ static int mx3fb_unmap_video_memory(struct fb_info *fbi)
 
 /**
  * mx3fb_init_fbinfo() - initialize framebuffer information object.
+ * @dev: the device
+ * @ops:	framebuffer device operations
  * @return:	initialized framebuffer structure.
  */
 static struct fb_info *mx3fb_init_fbinfo(struct device *dev,