diff options
| author | Krzysztof Halasa <khc@pm.waw.pl> | 2007-10-16 01:29:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:20 -0700 |
| commit | 28ebe4f66beda8f142569d24fe3b168f8a08a6a6 (patch) | |
| tree | 7a5a448996ad6dbf98634a2dce6ffa54cc28a130 /drivers/video | |
| parent | ee5618f4937dcbff15e504663d81a7adb3d849bf (diff) | |
Intel FB: force even line count in interlaced mode
Intel FB: the chip adds two halflines automatically in interlaced mode,
force even line count for the right timings.
Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: <sylvain.meyer@worldonline.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
| -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; |