From f24eeb191229b040deb3e813913e06a4316c6d3f Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Fri, 19 Dec 2014 19:33:27 +0200 Subject: [PATCH] drm/i915: vlv: sanitize RPS interrupt mask during GPU idling We apply the RPS interrupt workaround on VLV everywhere except when writing the mask directly during idling the GPU. For consistency do this also there. While at it also extend the code comment about affected platforms. I couldn't reproduce the issue on VLV fixed by this workaround, by removing the workaround from everywhere, while it's 100% reproducible on SNB using igt/gem_reset_stats/ban-ctx-render. So also add a note that it hasn't been verified if the workaround really applies to VLV/CHV. Suggested-by: Daniel Vetter Signed-off-by: Imre Deak Reviewed-by: Daniel Vetter Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/i915_irq.c | 4 +++- drivers/gpu/drm/i915/intel_pm.c | 3 ++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index ba86dc330547..b051a238baf9 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -295,8 +295,10 @@ void gen6_enable_rps_interrupts(struct drm_device *dev) u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask) { /* - * IVB and SNB hard hangs on looping batchbuffer + * SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer * if GEN6_PM_UP_EI_EXPIRED is masked. + * + * TODO: verify if this can be reproduced on VLV,CHV. */ if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv)) mask &= ~GEN6_PM_RP_UP_EI_EXPIRED; diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 3801ff59595f..bf814a64582a 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4432,7 +4432,8 @@ static void vlv_set_rps_idle(struct drm_i915_private *dev_priv) return; /* Mask turbo interrupt so that they will not come in between */ - I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); + I915_WRITE(GEN6_PMINTRMSK, + gen6_sanitize_rps_pm_mask(dev_priv, ~0)); vlv_force_gfx_clock(dev_priv, true); -- 2.20.1