From: Carl Worth Date: Mon, 17 May 2010 16:46:05 +0000 (-0700) Subject: Revert "drm/i915: Don't enable pipe/plane/VCO early (wait for DPMS on)." X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0d7168bcf45fa5b6307726091ea77fd4ab16d1ab;p=deliverable%2Flinux.git Revert "drm/i915: Don't enable pipe/plane/VCO early (wait for DPMS on)." This reverts commit cfecde435dda78248d6fcdc424bed68d5db6be0b. The commit was first created as an attempt to fix LVDS initialiazation on Ironlake. Testing revealed that it didn't fix that, but it was assumed to still be correct anyway. Subsequent testing has revealed that this commit has caused other regressions: * Change in VBlank interrupt frequency causing 60% 3D performance regression http://bugs.freedesktop.org/show_bug.cgi?id=27698 * Black screen on G45 http://bugs.freedesktop.org/show_bug.cgi?id=27733 So revert this buggy code for now to revisit later when we can fix actual bugs without causing these regressions. Signed-off-by: Carl Worth Signed-off-by: Eric Anholt --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 88a1ab7c05ce..b40155fe5122 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3653,6 +3653,11 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, pipeconf &= ~PIPEACONF_DOUBLE_WIDE; } + dspcntr |= DISPLAY_PLANE_ENABLE; + pipeconf |= PIPEACONF_ENABLE; + dpll |= DPLL_VCO_ENABLE; + + /* Disable the panel fitter if it was on our pipe */ if (!HAS_PCH_SPLIT(dev) && intel_panel_fitter_pipe(dev) == pipe) I915_WRITE(PFIT_CONTROL, 0);