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-rw-r--r--drivers/video/fbdev/sm712fb.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/video/fbdev/sm712fb.c b/drivers/video/fbdev/sm712fb.c
index 502d0de2feec..d05379affa32 100644
--- a/drivers/video/fbdev/sm712fb.c
+++ b/drivers/video/fbdev/sm712fb.c
@@ -1171,8 +1171,12 @@ static void sm7xx_set_timing(struct smtcfb_info *sfb)
smtc_crtcw(i, vgamode[j].init_cr00_cr18[i]);
/* init CRTC register CR30 - CR4D */
- for (i = 0; i < SIZE_CR30_CR4D; i++)
+ for (i = 0; i < SIZE_CR30_CR4D; i++) {
+ if ((i + 0x30) >= 0x3B && (i + 0x30) <= 0x3F)
+ /* side-effect, don't write to CR3B-CR3F */
+ continue;
smtc_crtcw(i + 0x30, vgamode[j].init_cr30_cr4d[i]);
+ }
/* init CRTC register CR90 - CRA7 */
for (i = 0; i < SIZE_CR90_CRA7; i++)