viafb: remove duplicated clock information
This patch removes the direct lookup table for resolution+refresh and
pixclock by calculating this information from the mode table. Removes a
lot of dupllication and error potential by just doing a little more
calculations on each mode change.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index 9ecf4862..8c1393e 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -2608,35 +2608,43 @@
int viafb_get_pixclock(int hres, int vres, int vmode_refresh)
{
int i;
+ struct crt_mode_table *best;
+ struct VideoModeTable *vmode = viafb_get_mode(hres, vres);
- for (i = 0; i < NUM_TOTAL_RES_MAP_REFRESH; i++) {
- if ((hres == res_map_refresh_tbl[i].hres)
- && (vres == res_map_refresh_tbl[i].vres)
- && (vmode_refresh == res_map_refresh_tbl[i].vmode_refresh))
- return res_map_refresh_tbl[i].pixclock;
+ if (!vmode)
+ return RES_640X480_60HZ_PIXCLOCK;
+
+ best = &vmode->crtc[0];
+ for (i = 1; i < vmode->mode_array; i++) {
+ if (abs(vmode->crtc[i].refresh_rate - vmode_refresh)
+ < abs(best->refresh_rate - vmode_refresh))
+ best = &vmode->crtc[i];
}
- return RES_640X480_60HZ_PIXCLOCK;
+ return 1000000000 / (best->crtc.hor_total * best->crtc.ver_total)
+ * 1000 / best->refresh_rate;
}
int viafb_get_refresh(int hres, int vres, u32 long_refresh)
{
-#define REFRESH_TOLERANCE 3
- int i, nearest = -1, diff = REFRESH_TOLERANCE;
- for (i = 0; i < NUM_TOTAL_RES_MAP_REFRESH; i++) {
- if ((hres == res_map_refresh_tbl[i].hres)
- && (vres == res_map_refresh_tbl[i].vres)
- && (diff > (abs(long_refresh -
- res_map_refresh_tbl[i].vmode_refresh)))) {
- diff = abs(long_refresh - res_map_refresh_tbl[i].
- vmode_refresh);
- nearest = i;
- }
+ int i;
+ struct crt_mode_table *best;
+ struct VideoModeTable *vmode = viafb_get_mode(hres, vres);
+
+ if (!vmode)
+ return 60;
+
+ best = &vmode->crtc[0];
+ for (i = 1; i < vmode->mode_array; i++) {
+ if (abs(vmode->crtc[i].refresh_rate - long_refresh)
+ < abs(best->refresh_rate - long_refresh))
+ best = &vmode->crtc[i];
}
-#undef REFRESH_TOLERANCE
- if (nearest > 0)
- return res_map_refresh_tbl[nearest].vmode_refresh;
- return 60;
+
+ if (abs(best->refresh_rate - long_refresh) > 3)
+ return 60;
+
+ return best->refresh_rate;
}
static void device_off(void)