From: Jesse Barnes Date: Fri, 8 Mar 2013 18:45:53 +0000 (-0800) Subject: drm/i915: allow force wake at init time on VLV v2 X-Git-Tag: next-20130320~58^2~18 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d62b4892f3d9f7dd2002e5309be10719d6805b0f;p=karo-tx-linux.git drm/i915: allow force wake at init time on VLV v2 We need to set the 'allow force wake' bit to enable forcewake handling later on. v2: split from clock gating patch (Jani) check for allowwakeack (Ville) Signed-off-by: Jesse Barnes Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 1417fc6c28ee..d554b2171df0 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4010,7 +4010,16 @@ int i915_gem_init(struct drm_device *dev) int ret; mutex_lock(&dev->struct_mutex); + + if (IS_VALLEYVIEW(dev)) { + /* VLVA0 (potential hack), BIOS isn't actually waking us */ + I915_WRITE(VLV_GTLC_WAKE_CTRL, 1); + if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) & 1) == 1, 10)) + DRM_DEBUG_DRIVER("allow wake ack timed out\n"); + } + i915_gem_init_global_gtt(dev); + ret = i915_gem_init_hw(dev); mutex_unlock(&dev->struct_mutex); if (ret) { diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 4cf3eceb5153..f187b60739ed 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4150,6 +4150,8 @@ #define FORCEWAKE_ACK_VLV 0x1300b4 #define FORCEWAKE_ACK_HSW 0x130044 #define FORCEWAKE_ACK 0x130090 +#define VLV_GTLC_WAKE_CTRL 0x130090 +#define VLV_GTLC_PW_STATUS 0x130094 #define FORCEWAKE_MT 0xa188 /* multi-threaded */ #define FORCEWAKE_KERNEL 0x1 #define FORCEWAKE_USER 0x2