You give me too much credit. I just gave you an explanation of what the
hardware does, then you ran with it.
On Thu, Jun 19, 2014 at 12:06:13PM -0700, Ben Widawsky wrote:
+ DRM_INFO("Reducing the compressed framebuffer size. This may
lead to increased power. Try to increase stolen memory size if available in
BIOS.\n");
I prefer "This may lead to less power savings than a non-reduced size." since
FBC is still going to save power.
dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane);
if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
+ dev_priv->fbc.threshold++;
+
+ switch (dev_priv->fbc.threshold) {
+ case 4:
+ dpfc_ctl |= DPFC_CTL_LIMIT_4X;
+ break;
+ case 2:
dpfc_ctl |= DPFC_CTL_LIMIT_2X;
- else
+ break;
+ case 1:
dpfc_ctl |= DPFC_CTL_LIMIT_1X;
+ break;
+ }
I Am Not A Coder, but at a glance it looks like the ++ could lead to undefined
case 3 when you want case 4.
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