diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-10-04 20:32:25 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-10-10 12:46:57 +0200 |
| commit | e1553faa904f3f8bdd734ee1404ce39c652bc9c6 (patch) | |
| tree | 17267c8c11966a72b59f1af46b47c30992b93c4c /drivers/gpu/drm/i915/intel_display.c | |
| parent | f01b796283e0fb2aa70b7cceb7067340f8ec6626 (diff) | |
drm/i915: Fix VGA_DISP_DISABLE check
The VGACNTRL register contains a bunch of other stuff besides
the VGA_DISP_DISABLE bit. When we write the register we always set those
other bits to zero, so normally the current check would work.
However on HSW disabling and re-enabling the power well will reset the
VGACNTRL register to its default value, which has several of the other
bits set as well.
So only look at the VGA_DISP_DISABLE bit when checking whether the VGA
plane needs re-disabling.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 183eb82e9be..a003bc572a0 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -10663,7 +10663,7 @@ void i915_redisable_vga(struct drm_device *dev) (I915_READ(HSW_PWR_WELL_DRIVER) & HSW_PWR_WELL_STATE_ENABLED) == 0) return; - if (I915_READ(vga_reg) != VGA_DISP_DISABLE) { + if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) { DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n"); i915_disable_vga(dev); i915_disable_vga_mem(dev); |