If no PCH was detected in intel_detect_pch() don't touch the
handshake registers.
Cc: Lucas De Marchi <lucas.demar...@intel.com>
Cc: Jani Nikula <jani.nik...@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
---
drivers/gpu/drm/i915/intel_runtime_pm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c
b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 1c2de9b69a19..f33f335d6106 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -3325,6 +3325,9 @@ static void intel_pch_reset_handshake(struct
drm_i915_private *dev_priv,
i915_reg_t reg;
u32 reset_bits, val;
+ if (!HAS_PCH_SPLIT(dev_priv))
+ return;
+
if (IS_IVYBRIDGE(dev_priv)) {
reg = GEN7_MSG_CTL;
reset_bits = WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK;
--
2.19.1
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