[PATCH v3 4/8] drm/i915: Disable framebuffer compression for i915 driver in VM

Yu Zhang
2014-11-13T12:32:35Z

Framebuffer compression is disabled when driver detects it's
running in a Intel GVT-g enlightened VM, because FBC is not
emulated and there is no stolen memory for a vGPU.

v2:
take Chris' comments:
- move the code into intel_update_fbc()

Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Signed-off-by: Jike Song <jike.song@intel.com>
Signed-off-by: Zhiyuan Lv <zhiyuan.lv@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 7a69eba..3bc5d93 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -544,6 +544,10 @@ void intel_update_fbc(struct drm_device *dev)
return;
}

+ /* disable framebuffer compression in vGPU */
+ if (intel_vgpu_active(dev))
+ i915.enable_fbc = 0;
+
/*
* If FBC is already on, we just have to verify that we can
* keep it that way...
--
1.9.1