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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/video/fbdev/core/fbcon.h
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@@ -25,11 +25,13 @@
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     *    low-level frame buffer device
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     */
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-struct display {
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+struct fbcon_display {
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     /* Filled in by the low-level console driver */
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     const u_char *fontdata;
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     int userfont;                   /* != 0 if fontdata kmalloc()ed */
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-    u_short scrollmode;             /* Scroll Method */
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+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
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+    u_short scrollmode;             /* Scroll Method, use fb_scrollmode() */
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+#endif
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     u_short inverse;                /* != 0 text black on white as default */
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     short yscroll;                  /* Hardware scrolling */
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     int vrows;                      /* number of virtual rows */
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@@ -68,7 +70,7 @@
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 	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
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 	struct timer_list cursor_timer; /* Cursor timer */
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 	struct fb_cursor cursor_state;
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-	struct display *p;
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+	struct fbcon_display *p;
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 	struct fb_info *info;
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         int    currcon;	                /* Current VC. */
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 	int    cur_blink_jiffies;
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@@ -208,6 +210,17 @@
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 #define SCROLL_REDRAW	   0x004
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 #define SCROLL_PAN_REDRAW  0x005
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+static inline u_short fb_scrollmode(struct fbcon_display *fb)
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+{
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+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
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+	return fb->scrollmode;
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+#else
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+	/* hardcoded to SCROLL_REDRAW if acceleration was disabled. */
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+	return SCROLL_REDRAW;
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+#endif
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+}
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+
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+
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 #ifdef CONFIG_FB_TILEBLITTING
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 extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
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 #endif
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@@ -218,7 +231,7 @@
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 #define FBCON_ATTRIBUTE_REVERSE   2
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 #define FBCON_ATTRIBUTE_BOLD      4
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-static inline int real_y(struct display *p, int ypos)
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+static inline int real_y(struct fbcon_display *p, int ypos)
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 {
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 	int rows = p->vrows;
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