PSR must be enabled after transcoder and port are running.
And it is only available for HSW.
v2: move enable/disable to intel_ddi
v3: The spec suggests PSR should be disabled even before backlight (by pzanoni)
v4: also disabling and enabling whenever panel is disabled/enabled.
CC: Paulo Zanoni <paulo.r.zanoni at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 2 ++
drivers/gpu/drm/i915/intel_dp.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 224ce25..45042c0 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1117,6 +1117,7 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
intel_dp_stop_link_train(intel_dp);
ironlake_edp_backlight_on(intel_dp);
+ intel_edp_psr_enable(intel_dp);
}
if (intel_crtc->eld_vld && type != INTEL_OUTPUT_EDP) {
@@ -1147,6 +1148,7 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
if (type == INTEL_OUTPUT_EDP) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+ intel_edp_psr_disable(intel_dp);
ironlake_edp_backlight_off(intel_dp);
}
}
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index c105236..e7cd6e0 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1603,6 +1603,7 @@ static void intel_disable_dp(struct intel_encoder *encoder)
/* Make sure the panel is off before trying to change the mode. But also
* ensure that we have vdd while we switch off the panel. */
ironlake_edp_panel_vdd_on(intel_dp);
+ intel_edp_psr_disable(intel_dp);
ironlake_edp_backlight_off(intel_dp);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
ironlake_edp_panel_off(intel_dp);
@@ -1643,6 +1644,7 @@ static void intel_enable_dp(struct intel_encoder *encoder)
intel_dp_complete_link_train(intel_dp);
intel_dp_stop_link_train(intel_dp);
ironlake_edp_backlight_on(intel_dp);
+ intel_edp_psr_enable(intel_dp);
if (IS_VALLEYVIEW(dev)) {
struct intel_digital_port *dport =
--
1.7.11.7
