viafb: split global index up

This is the first step to remove an artificial global index that was used
in two ways:

1. As a pseudo index in the mode table.  Pseudo as you had to search
   through the table to find the referenced entry.  This was replaced by
   using a pointer to the entry.

2. As a shortcut to compare a combination of horizontal and vertical
   resolution at the same time.

   This was replaced by a "(hres<<16) | vres" which is good enough for
   now and the near future.  If vres or hres become greater than 2^16 this
   might indeed cause problems but this solution allows to split this
   indexing mess up without the requirement to do even more code changes.

This is a big change that will allow more clean ups.  It should be a bit
faster but that is probably not relevant for normal operation.  No
regressions expected but as this is a relatively big step heavy testing is
appreciated.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/video/via/viamode.h b/drivers/video/via/viamode.h
index a9d6554fabdf..5b1ced86514b 100644
--- a/drivers/video/via/viamode.h
+++ b/drivers/video/via/viamode.h
@@ -32,13 +32,11 @@ struct VPITTable {
 };
 
 struct VideoModeTable {
-        int ModeIndex;
         struct crt_mode_table *crtc;
         int mode_array;
 };
 
 struct patch_table {
-        int mode_index;
         int table_length;
         struct io_reg *io_reg_table;
 };
@@ -59,13 +57,11 @@ extern int NUM_TOTAL_CX700_ModeXregs;
 extern int NUM_TOTAL_VX855_ModeXregs;
 extern int NUM_TOTAL_CLE266_ModeXregs;
 extern int NUM_TOTAL_PATCH_MODE;
-extern int NUM_TOTAL_MODETABLE;
 
 /********************/
 /* Mode Table       */
 /********************/
 
-extern struct VideoModeTable CLE266Modes[];
 extern struct crt_mode_table CEAM1280x720[];
 extern struct crt_mode_table CEAM1920x1080[];
 extern struct VideoModeTable CEA_HDMI_Modes[];
@@ -81,4 +77,8 @@ extern struct io_reg CLE266_ModeXregs[];
 extern struct io_reg PM1024x768[];
 extern struct patch_table res_patch_table[];
 extern struct VPITTable VPIT;
+
+struct VideoModeTable *viafb_get_mode(int hres, int vres);
+struct VideoModeTable *viafb_get_rb_mode(int hres, int vres);
+
 #endif /* __VIAMODE_H__ */