From 0b5c541b93792ddd7fe34a450c76377ffad7bef3 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Wed, 28 Sep 2011 16:41:05 -0700 Subject: [PATCH] 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 Reviewed-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 320c37963745..2b4acfda21cc 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 -- 2.34.1