From: Paulo Zanoni Date: Fri, 3 May 2013 20:23:45 +0000 (-0300) Subject: drm/i915: set FORCE_ARB_IDLE_PLANES workaround X-Git-Tag: v3.11-rc1~65^2~105^2~61 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=90a8864320b2a9f91e5b5d561924a4bb70b90dcc;p=pandora-kernel.git drm/i915: set FORCE_ARB_IDLE_PLANES workaround Commit 1544d9d57396d5c0c6b7644ed5ae1f4d6caad07a added a workaround inside haswell_init_clock_gating and mentioned it is "a workaround for early silicon revisions and should be removed later". This workaround is documented in bit 31 of PRI_CTL. I asked Arthur and he mentioned that setting FORCE_ARB_IDLE_PLANES replaces that workaround for the newer machines. So use the new one. Also notice that there's still another workaround for PRI_CTL that involves WM_DBG, but it's not the one we're reverting. And notice that we were previously setting WM_DBG_DISALLOW_MULTIPIPE_LP which disables the LP watermarks when more than one pipe is used, and we really don't want this because we need the LP watermarks if we want to reach deeper PC states. Signed-off-by: Paulo Zanoni Reviewed-by: Ville Syrjälä [danvet: Add a comment for the w/a name Ville dug out of Bspec.] Signed-off-by: Daniel Vetter --- Reading git-diff-tree failed