This reverts commit 885a50147f00a8a80108904bf58a18af357717f3.
We actually *do* need to track DPMS state so that on hotplug, we don't
retrain the link until DPMS is disabled.
However, that code had a small bug -- it wouldn't set the dpms_mode at
mode set time, and so link retraining would not actually occur on
monitor hotplug until the monitor had gone through a DPMS off/DPMS on
cycle. Setting dpms_mode to DRM_MODE_DPMS_ON in intel_dp_commit fixes that.
Signed-off-by: Keith Packard <keithp at keithp.com>
---
drivers/gpu/drm/i915/intel_dp.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9f134d2..4493641 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -50,6 +50,7 @@ struct intel_dp {
bool has_audio;
int force_audio;
uint32_t color_range;
+ int dpms_mode;
uint8_t link_bw;
uint8_t lane_count;
uint8_t dpcd[8];
@@ -1011,6 +1012,8 @@ static void intel_dp_commit(struct drm_encoder *encoder)
if (is_edp(intel_dp))
ironlake_edp_backlight_on(dev);
+
+ intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
}
static void
@@ -1045,6 +1048,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
if (is_edp(intel_dp))
ironlake_edp_backlight_on(dev);
}
+ intel_dp->dpms_mode = mode;
}
/*
@@ -1591,6 +1595,9 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
static void
intel_dp_check_link_status(struct intel_dp *intel_dp)
{
+ if (intel_dp->dpms_mode != DRM_MODE_DPMS_ON)
+ return;
+
if (!intel_dp->base.base.crtc)
return;
@@ -1939,6 +1946,7 @@ intel_dp_init(struct drm_device *dev, int output_reg)
return;
intel_dp->output_reg = output_reg;
+ intel_dp->dpms_mode = -1;
intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
if (!intel_connector) {
--
1.7.5.4
--
keith.packard at intel.com
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