diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2009-11-04 09:42:52 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-11-19 13:02:46 +1000 |
| commit | cda6be1ce27d721a88cb90543a1e6d0f41baeaa4 (patch) | |
| tree | 3a30d44004a75a526719fbe7082a59327e44449a | |
| parent | 731b5a15a3b1474a41c2ca29b4c32b0f21bc852e (diff) | |
| download | blackbird-op-linux-cda6be1ce27d721a88cb90543a1e6d0f41baeaa4.tar.gz blackbird-op-linux-cda6be1ce27d721a88cb90543a1e6d0f41baeaa4.zip | |
drm/fb: fix FBIOGET/PUT_VSCREENINFO pixel clock handling
When the framebuffer driver does not publish detailed timing information
for the current video mode, the correct value for the pixclock field is
zero, not -1.
Since pixclock is actually unsigned, the value -1 would be interpreted
as 4294967295 picoseconds (i.e., about 4 milliseconds) by
register_framebuffer() and userspace programs.
This patch allows X.org's fbdev driver to work.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index ea336d2f6529..e812babe2122 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -602,7 +602,7 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, struct drm_framebuffer *fb = fb_helper->fb; int depth; - if (var->pixclock == -1 || !var->pixclock) + if (var->pixclock != 0) return -EINVAL; /* Need to resize the fb object !!! */ @@ -694,7 +694,7 @@ int drm_fb_helper_set_par(struct fb_info *info) int ret; int i; - if (var->pixclock != -1) { + if (var->pixclock != 0) { DRM_ERROR("PIXEL CLCOK SET\n"); return -EINVAL; } @@ -907,7 +907,7 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev, fb_helper->fb = fb; if (new_fb) { - info->var.pixclock = -1; + info->var.pixclock = 0; if (register_framebuffer(info) < 0) return -EINVAL; } else { |
