From 321cb431c5027d83257d8fbfd957f9d90b469e74 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Wed, 2 Dec 2009 08:16:55 +0100 Subject: drm/fb: fix FBIOGET/PUT_VSCREENINFO pixel clock handling commit 5349ef3127c77075ff70b2014f17ae0fbcaaf199 upstream 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 Tested-by: Paulius Zaleckas Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_fb.c | 8 ++++---- drivers/gpu/drm/radeon/radeon_fb.c | 6 +++--- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c index 1d30802e773e..75a9b83fd7d3 100644 --- a/drivers/gpu/drm/i915/intel_fb.c +++ b/drivers/gpu/drm/i915/intel_fb.c @@ -114,7 +114,7 @@ static int intelfb_check_var(struct fb_var_screeninfo *var, struct drm_framebuffer *fb = &intel_fb->base; int depth; - if (var->pixclock == -1 || !var->pixclock) + if (var->pixclock != 0) return -EINVAL; /* Need to resize the fb object !!! */ @@ -205,7 +205,7 @@ static int intelfb_set_par(struct fb_info *info) DRM_DEBUG("%d %d\n", var->xres, var->pixclock); - if (var->pixclock != -1) { + if (var->pixclock != 0) { DRM_ERROR("PIXEL CLOCK SET\n"); return -EINVAL; @@ -692,7 +692,7 @@ static int intelfb_multi_fb_probe_crtc(struct drm_device *dev, struct drm_crtc * par->crtc_count = 1; if (new_fb) { - info->var.pixclock = -1; + info->var.pixclock = 0; if (register_framebuffer(info) < 0) return -EINVAL; } else @@ -846,7 +846,7 @@ static int intelfb_single_fb_probe(struct drm_device *dev) par->crtc_count = crtc_count; if (new_fb) { - info->var.pixclock = -1; + info->var.pixclock = 0; if (register_framebuffer(info) < 0) return -EINVAL; } else diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c index ec383edf5f38..f1d6d3d4519f 100644 --- a/drivers/gpu/drm/radeon/radeon_fb.c +++ b/drivers/gpu/drm/radeon/radeon_fb.c @@ -120,7 +120,7 @@ static int radeonfb_check_var(struct fb_var_screeninfo *var, struct drm_framebuffer *fb = &rfb->base; int depth; - if (var->pixclock == -1 || !var->pixclock) { + if (var->pixclock != 0) { return -EINVAL; } /* Need to resize the fb object !!! */ @@ -234,7 +234,7 @@ static int radeonfb_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; } @@ -828,7 +828,7 @@ static int radeonfb_single_fb_probe(struct radeon_device *rdev) rfbdev->crtc_count = crtc_count; if (new_fb) { - info->var.pixclock = -1; + info->var.pixclock = 0; if (register_framebuffer(info) < 0) return -EINVAL; } else { -- cgit v1.2.3