From f97108d1d0facc7902134ebc453b226bbd4d1cdb Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 29 Jan 2010 11:27:07 -0800 Subject: drm/i915: add dynamic performance control support for Ironlake Ironlake (and 965GM, which this patch doesn't support) supports a hardware performance and power management feature that allows it to adjust to changes in GPU load over time with software help. The goal if this is to maximize performance/power for a given workload. This patch enables that feature, which is also a requirement for supporting Intelligent Power Sharing, a feature which allows for dynamic budgeting of power between the CPU and GPU in Arrandale platforms. Tested-by: ykzhao [anholt: Resolved against the irq handler loop removal] Signed-off-by: Jesse Barnes Signed-off-by: Eric Anholt --- drivers/gpu/drm/i915/i915_suspend.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/gpu/drm/i915/i915_suspend.c') diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index a3b90c9561dc..2c346645acfa 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -682,6 +682,7 @@ void i915_restore_display(struct drm_device *dev) I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS); I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR); I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL); + I915_WRITE(RSTDBYCTL, dev_priv->saveRSTDBYCTL); } else { I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS); I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL); @@ -745,11 +746,15 @@ int i915_save_state(struct drm_device *dev) dev_priv->saveGTIMR = I915_READ(GTIMR); dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR); dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR); + dev_priv->saveRSTDBYCTL = I915_READ(RSTDBYCTL); } else { dev_priv->saveIER = I915_READ(IER); dev_priv->saveIMR = I915_READ(IMR); } + if (IS_IRONLAKE_M(dev)) + ironlake_disable_drps(dev); + /* Cache mode state */ dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0); @@ -820,6 +825,9 @@ int i915_restore_state(struct drm_device *dev) /* Clock gating state */ intel_init_clock_gating(dev); + if (IS_IRONLAKE_M(dev)) + ironlake_enable_drps(dev); + /* Cache mode state */ I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000); -- cgit v1.2.3