viafb: make single framebuffer multiple adapter mode work

This patch implementes this mode (viafb_SAMM_ON set and
viafb_dual_fb not set) in a useful way for CRT and DVI devices.
The same content is shown on both devices in different video modes.
The first (primary) resolution must not be bigger than the secondary
one and determines the visible region. The same content is shown
centered on the secondary output.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/video/via/dvi.c b/drivers/video/via/dvi.c
index 9138e517267c..3312c81e861c 100644
--- a/drivers/video/via/dvi.c
+++ b/drivers/video/via/dvi.c
@@ -172,7 +172,8 @@ static int tmds_register_read_bytes(int index, u8 *buff, int buff_len)
 }
 
 /* DVI Set Mode */
-void viafb_dvi_set_mode(const struct fb_var_screeninfo *var, int iga)
+void viafb_dvi_set_mode(const struct fb_var_screeninfo *var,
+        u16 cxres, u16 cyres, int iga)
 {
         struct fb_var_screeninfo dvi_var = *var;
         struct crt_mode_table *rb_mode;
@@ -185,7 +186,7 @@ void viafb_dvi_set_mode(const struct fb_var_screeninfo *var, int iga)
                         viafb_fill_var_timing_info(&dvi_var, rb_mode);
         }
 
-        viafb_fill_crtc_timing(&dvi_var, iga);
+        viafb_fill_crtc_timing(&dvi_var, cxres, cyres, iga);
 }
 
 /* Sense DVI Connector */