From 45ac22c81b1088f5ac08dc5367f78c192d68d756 Mon Sep 17 00:00:00 2001 From: Li Peng Date: Sat, 12 Jun 2010 23:38:35 +0800 Subject: drm/i915: Turn on 945 self-refresh only if single CRTC is active Enable self-refresh on 945 when just one CRTC is activated. Otherwise user would get display flicker with dual display. This fixes https://bugs.freedesktop.org/show_bug.cgi?id=27667 Signed-off-by: Li Peng Reviewed-by: Adam Jackson Signed-off-by: Eric Anholt --- drivers/gpu/drm/i915/intel_display.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index a8d65b7..fdeff43 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4483,6 +4483,7 @@ static void intel_idle_update(struct work_struct *work) struct drm_device *dev = dev_priv->dev; struct drm_crtc *crtc; struct intel_crtc *intel_crtc; + int enabled = 0; if (!i915_powersave) return; @@ -4491,21 +4492,22 @@ static void intel_idle_update(struct work_struct *work) i915_update_gfx_val(dev_priv); - if (IS_I945G(dev) || IS_I945GM(dev)) { - DRM_DEBUG_DRIVER("enable memory self refresh on 945\n"); - I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN); - } - list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { /* Skip inactive CRTCs */ if (!crtc->fb) continue; + enabled++; intel_crtc = to_intel_crtc(crtc); if (!intel_crtc->busy) intel_decrease_pllclock(crtc); } + if ((enabled == 1) && (IS_I945G(dev) || IS_I945GM(dev))) { + DRM_DEBUG_DRIVER("enable memory self refresh on 945\n"); + I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN); + } + mutex_unlock(&dev->struct_mutex); } -- cgit v1.1