diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 305be115319e..886124a720e9 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4873,6 +4873,8 @@ static void lpt_init_pch_refclk(struct drm_device *dev) if (!has_vga) return; + mutex_lock(&dev_priv->dpio_lock); + /* XXX: Rip out SDV support once Haswell ships for real. */ if (IS_HASWELL(dev) && (dev->pci_device & 0xFF00) == 0x0C00) is_sdv = true; @@ -5015,6 +5017,8 @@ static void lpt_init_pch_refclk(struct drm_device *dev) tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK); tmp |= SBI_DBUFF0_ENABLE; intel_sbi_write(dev_priv, SBI_DBUFF0, tmp, SBI_ICLK); + + mutex_unlock(&dev_priv->dpio_lock); } /* |