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| author | Alex Shi <alex.shi@linaro.org> | 2016-05-24 12:18:13 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-05-24 12:18:13 +0800 |
| commit | 0a296a966f183e4ef1fcb37940940e8df8c4f258 (patch) | |
| tree | f3715d78e72389582ce2ad5dc5c59051f1814b4b /drivers/gpu/drm/i915/i915_reg.h | |
| parent | 03d8016839b087e141e26472fabcf860bc05cf7d (diff) | |
| parent | e429f243df2823451c92227317e5fce5f310b674 (diff) | |
Merge tag 'v4.1.25' into linux-linaro-lsk-v4.1lsk-v4.1-16.05
This is the 4.1.25 stable release
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a30db4b4050e..d20d818620c6 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2452,7 +2452,14 @@ enum skl_disp_power_wells { #define GEN6_RP_STATE_LIMITS (MCHBAR_MIRROR_BASE_SNB + 0x5994) #define GEN6_RP_STATE_CAP (MCHBAR_MIRROR_BASE_SNB + 0x5998) -#define INTERVAL_1_28_US(us) (((us) * 100) >> 7) +/* + * Make these a multiple of magic 25 to avoid SNB (eg. Dell XPS + * 8300) freezing up around GPU hangs. Looks as if even + * scheduling/timer interrupts start misbehaving if the RPS + * EI/thresholds are "bad", leading to a very sluggish or even + * frozen machine. + */ +#define INTERVAL_1_28_US(us) roundup(((us) * 100) >> 7, 25) #define INTERVAL_1_33_US(us) (((us) * 3) >> 2) #define GT_INTERVAL_FROM_US(dev_priv, us) (IS_GEN9(dev_priv) ? \ INTERVAL_1_33_US(us) : \ |