fbcon: font setting should check limitation of driver

fbcon_set_font() will now check if the new font dimensions can be drawn by the
driver (by checking pixmap.blit_x and blit_y).  Similarly, add 2 new
parameters to get_default_font(), font_w and font_h, to further aid in the
font selection process.

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/video/console/fonts.c b/drivers/video/console/fonts.c
index c960728b7e82..a6828d0a4c56 100644
--- a/drivers/video/console/fonts.c
+++ b/drivers/video/console/fonts.c
@@ -98,6 +98,8 @@ const struct font_desc *find_font(const char *name)
  *      get_default_font - get default font
  *      @xres: screen size of X
  *      @yres: screen size of Y
+ *      @font_w: bit array of supported widths (1 - 32)
+ *      @font_h: bit array of supported heights (1 - 32)
  *
  *      Get the default font for a specified screen size.
  *      Dimensions are in pixels.
@@ -107,7 +109,8 @@ const struct font_desc *find_font(const char *name)
  *
  */
 
-const struct font_desc *get_default_font(int xres, int yres)
+const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
+                                         u32 font_h)
 {
     int i, c, cc;
     const struct font_desc *f, *g;
@@ -129,6 +132,11 @@ const struct font_desc *get_default_font(int xres, int yres)
 #endif
         if ((yres < 400) == (f->height <= 8))
             c += 1000;
+
+        if (!(font_w & (1 << (f->width - 1))) ||
+            !(font_w & (1 << (f->height - 1))))
+            c += 1000;
+
         if (c > cc) {
             cc = c;
             g = f;