[PATCH 14/17] drm/i915: Warn if stealing non pipe A/B power sequencer

ville.syrjala
2014-10-16T18:29:59Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

There's no power sequencer on pipe C on VLV/CHV so scream a bit if we
try to steal one from pipes other than A and B.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 103468c..74a6514 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2728,6 +2728,9 @@ static void vlv_steal_power_sequencer(struct drm_device *dev,

lockdep_assert_held(&dev_priv->pps_mutex);

+ if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
+ return;
+
list_for_each_entry(encoder, &dev->mode_config.encoder_list,
base.head) {
struct intel_dp *intel_dp;
--
2.0.4