Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

Pull drm updates from Dave Airlie:
 "Okay this is the big one, I was stalled on the fbdev pull req as I
  stupidly let fbdev guys merge a patch I required to fix a warning with
  some patches I had, they ended up merging the patch from the wrong
  place, but the warning should be fixed.  In future I'll just take the
  patch myself!

  Outside drm:

  There are some snd changes for the HDMI audio interactions on haswell,
  they've been acked for inclusion via my tree.  This relies on the
  wound/wait tree from Ingo which is already merged.

  Major changes:

  AMD finally released the dynamic power management code for all their
  GPUs from r600->present day, this is great, off by default for now but
  also a huge amount of code, in fact it is most of this pull request.

  Since it landed there has been a lot of community testing and Alex has
  sent a lot of fixes for any bugs found so far.  I suspect radeon might
  now be the biggest kernel driver ever :-P p.s.  radeon.dpm=1 to enable
  dynamic powermanagement for anyone.

  New drivers:

  Renesas r-car display unit.

  Other highlights:

   - core: GEM CMA prime support, use new w/w mutexs for TTM
     reservations, cursor hotspot, doc updates
   - dvo chips: chrontel 7010B support
   - i915: Haswell (fbc, ips, vecs, watermarks, audio powerwell),
     Valleyview (enabled by default, rc6), lots of pll reworking, 30bpp
     support (this time for sure)
   - nouveau: async buffer object deletion, context/register init
     updates, kernel vp2 engine support, GF117 support, GK110 accel
     support (with external nvidia ucode), context cleanups.
   - exynos: memory leak fixes, Add S3C64XX SoC series support, device
     tree updates, common clock framework support,
   - qxl: cursor hotspot support, multi-monitor support, suspend/resume
     support
   - mgag200: hw cursor support, g200 mode limiting
   - shmobile: prime support
   - tegra: fixes mostly

  I've been banging on this quite a lot due to the size of it, and it
  seems to okay on everything I've tested it on."

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (811 commits)
  drm/radeon/dpm: implement vblank_too_short callback for si
  drm/radeon/dpm: implement vblank_too_short callback for cayman
  drm/radeon/dpm: implement vblank_too_short callback for btc
  drm/radeon/dpm: implement vblank_too_short callback for evergreen
  drm/radeon/dpm: implement vblank_too_short callback for 7xx
  drm/radeon/dpm: add checks against vblank time
  drm/radeon/dpm: add helper to calculate vblank time
  drm/radeon: remove stray line in old pm code
  drm/radeon/dpm: fix display_gap programming on rv7xx
  drm/nvc0/gr: fix gpc firmware regression
  drm/nouveau: fix minor thinko causing bo moves to not be async on kepler
  drm/radeon/dpm: implement force performance level for TN
  drm/radeon/dpm: implement force performance level for ON/LN
  drm/radeon/dpm: implement force performance level for SI
  drm/radeon/dpm: implement force performance level for cayman
  drm/radeon/dpm: implement force performance levels for 7xx/eg/btc
  drm/radeon/dpm: add infrastructure to force performance levels
  drm/radeon: fix surface setup on r1xx
  drm/radeon: add support for 3d perf states on older asics
  drm/radeon: set default clocks for SI when DPM is disabled
  ...

1 files changed, 94 insertions, 0 deletions

diff --git a/include/drm/drm_fixed.h b/include/drm/drm_fixed.h
index 0ead502e17d2..f5e1168c7647 100644
--- a/include/drm/drm_fixed.h
+++ b/include/drm/drm_fixed.h
@@ -20,10 +20,13 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: Dave Airlie
+ *          Christian König
  */
 #ifndef DRM_FIXED_H
 #define DRM_FIXED_H
 
+#include <linux/math64.h>
+
 typedef union dfixed {
 	u32 full;
 } fixed20_12;
@@ -65,4 +68,95 @@ static inline u32 dfixed_div(fixed20_12 A, fixed20_12 B)
 	tmp /= 2;
 	return lower_32_bits(tmp);
 }
+
+#define DRM_FIXED_POINT		32
+#define DRM_FIXED_ONE		(1ULL << DRM_FIXED_POINT)
+#define DRM_FIXED_DECIMAL_MASK	(DRM_FIXED_ONE - 1)
+#define DRM_FIXED_DIGITS_MASK	(~DRM_FIXED_DECIMAL_MASK)
+
+static inline s64 drm_int2fixp(int a)
+{
+	return ((s64)a) << DRM_FIXED_POINT;
+}
+
+static inline int drm_fixp2int(int64_t a)
+{
+	return ((s64)a) >> DRM_FIXED_POINT;
+}
+
+static inline s64 drm_fixp_msbset(int64_t a)
+{
+	unsigned shift, sign = (a >> 63) & 1;
+
+	for (shift = 62; shift > 0; --shift)
+		if ((a >> shift) != sign)
+			return shift;
+
+	return 0;
+}
+
+static inline s64 drm_fixp_mul(s64 a, s64 b)
+{
+	unsigned shift = drm_fixp_msbset(a) + drm_fixp_msbset(b);
+	s64 result;
+
+	if (shift > 63) {
+		shift = shift - 63;
+		a >>= shift >> 1;
+		b >>= shift >> 1;
+	} else
+		shift = 0;
+
+	result = a * b;
+
+	if (shift > DRM_FIXED_POINT)
+		return result << (shift - DRM_FIXED_POINT);
+
+	if (shift < DRM_FIXED_POINT)
+		return result >> (DRM_FIXED_POINT - shift);
+
+	return result;
+}
+
+static inline s64 drm_fixp_div(s64 a, s64 b)
+{
+	unsigned shift = 63 - drm_fixp_msbset(a);
+	s64 result;
+
+	a <<= shift;
+
+	if (shift < DRM_FIXED_POINT)
+		b >>= (DRM_FIXED_POINT - shift);
+
+	result = div64_s64(a, b);
+
+	if (shift > DRM_FIXED_POINT)
+		return result >> (shift - DRM_FIXED_POINT);
+
+	return result;
+}
+
+static inline s64 drm_fixp_exp(s64 x)
+{
+	s64 tolerance = div64_s64(DRM_FIXED_ONE, 1000000);
+	s64 sum = DRM_FIXED_ONE, term, y = x;
+	u64 count = 1;
+
+	if (x < 0)
+		y = -1 * x;
+
+	term = y;
+
+	while (term >= tolerance) {
+		sum = sum + term;
+		count = count + 1;
+		term = drm_fixp_mul(term, div64_s64(y, count));
+	}
+
+	if (x < 0)
+		sum = drm_fixp_div(1, sum);
+
+	return sum;
+}
+
 #endif