The patch titled
fbdev: More accurate sync range extrapolation
has been added to the -mm tree. Its filename is
fbdev-more-accurate-sync-range-extrapolation.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: "Antonino A. Daplas" <adaplas@xxxxxxxxx>
The EDID block should specify the display's operating limits (vertical and
horizontal sync ranges, and maximum dot clock). If not given by the EDID
block, the ranges are extrapolated from the modelist. However, the
computation used is only a rough approximation, and the resulting values may
not reflect the actual capability of the display. This problem is frequently
encountered when the EDID block has a single entry, the single mode entry will
fail validation.
To prevent this, calculate the values based on the same method used in
fb_validate_mode().
Signed-off-by: Antonino Daplas <adaplas@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/video/fbmon.c | 28 ++++++++++++++++++++++++----
1 files changed, 24 insertions(+), 4 deletions(-)
diff -puN drivers/video/fbmon.c~fbdev-more-accurate-sync-range-extrapolation drivers/video/fbmon.c
--- devel/drivers/video/fbmon.c~fbdev-more-accurate-sync-range-extrapolation 2006-04-29 00:04:19.000000000 -0700
+++ devel-akpm/drivers/video/fbmon.c 2006-04-29 00:04:19.000000000 -0700
@@ -605,6 +605,7 @@ static int fb_get_monitor_limits(unsigne
block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
DPRINTK(" Monitor Operating Limits: ");
+
for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
if (edid_is_limits_block(block)) {
specs->hfmin = H_MIN_RATE * 1000;
@@ -618,11 +619,12 @@ static int fb_get_monitor_limits(unsigne
break;
}
}
-
+
/* estimate monitor limits based on modes supported */
if (retval) {
- struct fb_videomode *modes;
+ struct fb_videomode *modes, *mode;
int num_modes, i, hz, hscan, pixclock;
+ int vtotal, htotal;
modes = fb_create_modedb(edid, &num_modes);
if (!modes) {
@@ -632,20 +634,38 @@ static int fb_get_monitor_limits(unsigne
retval = 0;
for (i = 0; i < num_modes; i++) {
- hz = modes[i].refresh;
+ mode = &modes[i];
pixclock = PICOS2KHZ(modes[i].pixclock) * 1000;
- hscan = (modes[i].yres * 105 * hz + 5000)/100;
+ htotal = mode->xres + mode->right_margin + mode->hsync_len
+ + mode->left_margin;
+ vtotal = mode->yres + mode->lower_margin + mode->vsync_len
+ + mode->upper_margin;
+
+ if (mode->vmode & FB_VMODE_INTERLACED)
+ vtotal /= 2;
+
+ if (mode->vmode & FB_VMODE_DOUBLE)
+ vtotal *= 2;
+
+ hscan = (pixclock + htotal / 2) / htotal;
+ hscan = (hscan + 500) / 1000 * 1000;
+ hz = (hscan + vtotal / 2) / vtotal;
if (specs->dclkmax == 0 || specs->dclkmax < pixclock)
specs->dclkmax = pixclock;
+
if (specs->dclkmin == 0 || specs->dclkmin > pixclock)
specs->dclkmin = pixclock;
+
if (specs->hfmax == 0 || specs->hfmax < hscan)
specs->hfmax = hscan;
+
if (specs->hfmin == 0 || specs->hfmin > hscan)
specs->hfmin = hscan;
+
if (specs->vfmax == 0 || specs->vfmax < hz)
specs->vfmax = hz;
+
if (specs->vfmin == 0 || specs->vfmin > hz)
specs->vfmin = hz;
}
_
Patches currently in -mm which might be from adaplas@xxxxxxxxx are
origin.patch
savagefb-allocate-space-for-current-and-saved-register.patch
savagefb-add-state-save-and_restore-hooks.patch
savagefb-add-state-save-and_restore-hooks-fix.patch
fbdev-more-accurate-sync-range-extrapolation.patch
nvidiafb-revise-pci_device_id-table.patch
atyfb-fix-hardware-cursor-handling.patch
atyfb-remove-unneeded-calls-to-wait_for_idle.patch
atyfb-set-correct-acceleration-flags.patch
epson1355fb-update-platform-code.patch
vesafb-update-platform-code.patch
vfb-update-platform-code.patch
vga16fb-update-platform-code.patch
fbdev-static-pseudocolor-with-depth-less-than-4-does.patch
savagefb-whitespace-cleanup.patch
fbdev-firmware-edid-fixes.patch
-
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