We may need to disable the panel when flipping to a new buffer, so check
the state here and zero it out if needed, otherwise leave it alone.
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/intel_display.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 595590c..91660b1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2304,6 +2304,25 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
if (crtc->fb)
intel_finish_fb(crtc->fb);
+ I915_WRITE(PIPESRC(intel_crtc->pipe),
+ ((crtc->mode.hdisplay - 1) << 16) |
+ (crtc->mode.vdisplay - 1));
+ if (!dev_priv->pch_pf_size &&
+ (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) ||
+ intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
+ /* Force use of hard-coded filter coefficients
+ * as some pre-programmed values are broken,
+ * e.g. x201.
+ */
+ if (IS_IVYBRIDGE(dev))
+ I915_WRITE(PF_CTL(intel_crtc->pipe), 0);
+ else
+ I915_WRITE(PF_CTL(intel_crtc->pipe), 0);
+ I915_WRITE(PF_WIN_POS(intel_crtc->pipe), 0);
+ I915_WRITE(PF_WIN_SZ(intel_crtc->pipe), 0);
+ }
+
+
ret = dev_priv->display.update_plane(crtc, fb, x, y);
if (ret) {
intel_unpin_fb_obj(to_intel_framebuffer(fb)->obj);
--
1.7.9.5
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