From: Ville Syrjälä Date: Thu, 5 Dec 2013 13:51:31 +0000 (+0200) Subject: Revert "drm/i915/sprite: Always enable the scaler on IronLake" X-Git-Tag: firefly_0821_release~176^2~4523^2~16^2~37 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8368f0148fa95fb5720e0fbeb4a91d738f06a4b4;p=firefly-linux-kernel-4.4.55.git Revert "drm/i915/sprite: Always enable the scaler on IronLake" Apparently always enabling the sprite scaler magically made sprites work on ILK in the past. I think the real reason for the failure was missing sprite watermark programming, and enabling the scaler effectively disabled LP1+ watermarks, which was enough to keep things going. Or it might be that the hardware more or less ignores watermarks for scaled sprites since things seem to work even if I leave sprite watermarks at 0 and disable all other planes except the sprite. In any case, we left the scaler always on but then failed to check whether we might be exceeding the scaler's source size limits. That caused the sprite to fail when a sufficiently large unscaled image was being displayed. Now that we're getting proper watermark programming for ILK, we can keep the scaler disabled unless we need to do actual scaling. This reverts commit 8aaa81a166d80ac9bf2813984e5b4c2503d0fe08. Signed-off-by: Ville Syrjälä Reviewed-by: Imre Deak Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index 606c27b7ae8f..fe4de89c374c 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -469,7 +469,7 @@ ilk_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, crtc_h--; dvsscale = 0; - if (IS_GEN5(dev) || crtc_w != src_w || crtc_h != src_h) + if (crtc_w != src_w || crtc_h != src_h) dvsscale = DVS_SCALE_ENABLE | (src_w << 16) | src_h; I915_WRITE(DVSSTRIDE(pipe), fb->pitches[0]);