From: Chris Wilson Date: Sun, 20 Jan 2013 16:33:32 +0000 (+0000) Subject: drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits X-Git-Tag: v3.8-rc6~10^2^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f05bb0c7b624252a5e768287e340e8e45df96e42;p=pandora-kernel.git drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits On SNB, if bit 13 of GFX_MODE, Flush TLB Invalidate Mode, is not set to 1, the hardware can not program the scanline values. Those scanline values then control when the signal is sent from the display engine to the render ring for MI_WAIT_FOR_EVENTs. Note setting this bit means that TLB invalidations must be performed explicitly through the appropriate bits being set in PIPE_CONTROL. References: https://bugzilla.kernel.org/show_bug.cgi?id=52311 Signed-off-by: Chris Wilson Cc: stable@vger.kernel.org Reviewed-by: Ben Widawsky Signed-off-by: Daniel Vetter --- Reading git-diff-tree failed