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drm/i915: Enable eDP panel power during I2C initialization sequence 

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@keithp.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Keith Packard 2011-09-28 16:41:05 -07:00
parent 8c241fef3e
commit 0b5c541b93
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/i915/intel_dp.c
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@ -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