From: Imre Deak Date: Thu, 31 Jul 2014 11:03:36 +0000 (+0300) Subject: drm/i915: fix VDD state tracking after system resume X-Git-Tag: v3.17-rc1~81^2~15 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=6d93c0c41760c018ca02bf4c9164b9fda2184670;p=linux.git drm/i915: fix VDD state tracking after system resume Just like during booting the BIOS can leave the VDD bit enabled after system resume. So apply the same state sanitization there too. This fixes a problem where after resume the port power domain refcount gets unbalanced. v2: - unchanged v3: - call edp sanitizing from the encoder reset handler (Daniel) Reported-and-tested-by: Jarkko Nikula Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 71294b5b860c..874143981072 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4002,6 +4002,11 @@ void intel_dp_encoder_destroy(struct drm_encoder *encoder) kfree(intel_dig_port); } +static void intel_dp_encoder_reset(struct drm_encoder *encoder) +{ + intel_edp_panel_vdd_sanitize(to_intel_encoder(encoder)); +} + static const struct drm_connector_funcs intel_dp_connector_funcs = { .dpms = intel_connector_dpms, .detect = intel_dp_detect, @@ -4017,6 +4022,7 @@ static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = }; static const struct drm_encoder_funcs intel_dp_enc_funcs = { + .reset = intel_dp_encoder_reset, .destroy = intel_dp_encoder_destroy, };