From: Paulo Zanoni <paulo.r.zanoni at intel.com>
But only the first 2048 lines will be compressed. No problem.
With this I can finally see FBC on my 2560x1440 DP monitor, which
gives me a boost on the PC7 residency.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 6fdfd1a..190bae5 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -431,7 +431,7 @@ void intel_disable_fbc(struct drm_device *dev)
* - no pixel mulitply/line duplication
* - no alpha buffer discard
* - no dual wide
- * - framebuffer <= 2048 in width, 1536 in height
+ * - framebuffer <= max_hdisplay in width, max_vdisplay in height
*
* We can't assume that any compression will take place (worst case),
* so the compressed buffer has to be the same size as the uncompressed
@@ -449,6 +449,7 @@ void intel_update_fbc(struct drm_device *dev)
struct intel_framebuffer *intel_fb;
struct drm_i915_gem_object *obj;
int enable_fbc;
+ unsigned int max_vdisplay, max_hdisplay;
if (!i915_powersave)
return;
@@ -507,8 +508,17 @@ void intel_update_fbc(struct drm_device *dev)
dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE;
goto out_disable;
}
- if ((crtc->mode.hdisplay > 2048) ||
- (crtc->mode.vdisplay > 1536)) {
+
+ if (INTEL_INFO(dev)->gen < 7 || IS_IVYBRIDGE(dev) ||
+ IS_VALLEYVIEW(dev)) {
+ max_hdisplay = 2048;
+ max_vdisplay = 1536;
+ } else {
+ max_hdisplay = 4096;
+ max_vdisplay = 4096;
+ }
+ if ((crtc->mode.hdisplay > max_hdisplay) ||
+ (crtc->mode.vdisplay > max_vdisplay)) {
DRM_DEBUG_KMS("mode too large for compression, disabling\n");
dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
goto out_disable;
--
1.8.1.2
