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drm/i915: add fbc enable flag, but disable by default

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FBC has too many corner cases that we don't currently deal with, so
disable it by default so we can enable more important features like RC6,
which conflicts in some configurations.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31742
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Jesse Barnes
2011-05-05 15:24:21 -07:00
committed by Keith Packard
parent 8547920fc6
commit c1a9f04763
4 changed files with 14 additions and 1 deletions
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5
drivers/gpu/drm/i915/intel_display.c
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@@ -1731,6 +1731,11 @@ static void intel_update_fbc(struct drm_device *dev)
intel_fb = to_intel_framebuffer(fb);
obj = intel_fb->obj;
if (!i915_enable_fbc) {
DRM_DEBUG_KMS("fbc disabled per module param (default off)\n");
dev_priv->no_fbc_reason = FBC_MODULE_PARAM;
goto out_disable;
}
if (intel_fb->obj->base.size > dev_priv->cfb_size) {
DRM_DEBUG_KMS("framebuffer too large, disabling "
"compression\n");