diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 |
3 files changed, 12 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 6ed73ae2133a..d988cc350f66 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -348,12 +348,17 @@ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) { - int loop = 500; - u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); - while (fifo < 20 && loop--) { - udelay(10); - fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); + if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES ) { + int loop = 500; + u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); + while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) { + udelay(10); + fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); + } + WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES); + dev_priv->gt_fifo_count = fifo; } + dev_priv->gt_fifo_count--; } static int i915_drm_freeze(struct drm_device *dev) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 00dc59a51ccd..b37146c4526f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -277,6 +277,7 @@ typedef struct drm_i915_private { int relative_constants_mode; void __iomem *regs; + u32 gt_fifo_count; struct intel_gmbus { struct i2c_adapter adapter; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 96fb0fa47c40..02db299f621a 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3361,6 +3361,7 @@ #define FORCEWAKE_ACK 0x130090 #define GT_FIFO_FREE_ENTRIES 0x120008 +#define GT_FIFO_NUM_RESERVED_ENTRIES 20 #define GEN6_RPNSWREQ 0xA008 #define GEN6_TURBO_DISABLE (1<<31) |