drm/i915: don't enable self-refresh on Ironlake

We don't know how to enable it safely, especially as outputs turn on and
off.  When disabling LP1 we also need to make sure LP2 and 3 are already
disabled.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29173
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29082
Reported-by: Chris Lord <chris@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d094e9129223..4f5e15577e89 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2206,9 +2206,17 @@
 #define  WM1_LP_SR_EN           (1<<31)
 #define  WM1_LP_LATENCY_SHIFT   24
 #define  WM1_LP_LATENCY_MASK    (0x7f<<24)
+#define  WM1_LP_FBC_LP1_MASK    (0xf<<20)
+#define  WM1_LP_FBC_LP1_SHIFT   20
 #define  WM1_LP_SR_MASK         (0x1ff<<8)
 #define  WM1_LP_SR_SHIFT        8
 #define  WM1_LP_CURSOR_MASK     (0x3f)
+#define WM2_LP_ILK              0x4510c
+#define  WM2_LP_EN              (1<<31)
+#define WM3_LP_ILK              0x45110
+#define  WM3_LP_EN              (1<<31)
+#define WM1S_LP_ILK             0x45120
+#define  WM1S_LP_EN             (1<<31)
 
 /* Memory latency timer register */
 #define MLTR_ILK                0x11222