The DP i2c initialization code does a couple of i2c transactions,
which means that an eDP panel must be powered up.
Signed-off-by: Keith Packard <keithp@xxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9829581..414aef7 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -595,10 +595,15 @@ intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
return -EREMOTEIO;
}
+static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp);
+static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp);
+
static int
intel_dp_i2c_init(struct intel_dp *intel_dp,
struct intel_connector *intel_connector, const char *name)
{
+ int ret;
+
DRM_DEBUG_KMS("i2c_init %s\n", name);
intel_dp->algo.running = false;
intel_dp->algo.address = 0;
@@ -612,7 +617,10 @@ intel_dp_i2c_init(struct intel_dp *intel_dp,
intel_dp->adapter.algo_data = &intel_dp->algo;
intel_dp->adapter.dev.parent = &intel_connector->base.kdev;
- return i2c_dp_aux_add_bus(&intel_dp->adapter);
+ ironlake_edp_panel_vdd_on(intel_dp);
+ ret = i2c_dp_aux_add_bus(&intel_dp->adapter);
+ ironlake_edp_panel_vdd_off(intel_dp);
+ return ret;
}
static bool
--
1.7.6.3
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