diff options
| -rw-r--r-- | drivers/video/intelfb/intelfbhw.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c index 270f6552603c..a02ee24f3668 100644 --- a/drivers/video/intelfb/intelfbhw.c +++ b/drivers/video/intelfb/intelfbhw.c @@ -317,6 +317,14 @@ int intelfbhw_validate_mode(struct intelfb_info *dinfo, var->yres, VACTIVE_MASK + 1); return 1; } + if (var->xres < 4) { + WRN_MSG("X resolution too small (%d vs 4).\n", var->xres); + return 1; + } + if (var->yres < 4) { + WRN_MSG("Y resolution too small (%d vs 4).\n", var->yres); + return 1; + } /* Check for doublescan modes. */ if (var->vmode & FB_VMODE_DOUBLE) { @@ -324,6 +332,11 @@ int intelfbhw_validate_mode(struct intelfb_info *dinfo, return 1; } + if ((var->vmode & FB_VMODE_INTERLACED) && (var->yres & 1)) { + WRN_MSG("Odd number of lines in interlaced mode\n"); + return 1; + } + /* Check if clock is OK. */ tmp = 1000000000 / var->pixclock; if (tmp < MIN_CLOCK) { @@ -1127,6 +1140,8 @@ int intelfbhw_mode_to_hw(struct intelfb_info *dinfo, hblank_end); vactive = var->yres; + if (var->vmode & FB_VMODE_INTERLACED) + vactive--; /* the chip adds 2 halflines automatically */ vsync_start = vactive + var->lower_margin; vsync_end = vsync_start + var->vsync_len; vtotal = vsync_end + var->upper_margin; |