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From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 1/7] drm/i915: fix eDP detection
Date: Wed,  8 Sep 2010 12:41:59 -0700	[thread overview]
Message-ID: <1283974925-2913-2-git-send-email-jbarnes@virtuousgeek.org> (raw)
In-Reply-To: <1283974925-2913-1-git-send-email-jbarnes@virtuousgeek.org>

Panel needs to be powered up.
---
 drivers/gpu/drm/i915/intel_dp.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 51d1429..625b480 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -754,13 +754,14 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 	}
 }
 
-static void ironlake_edp_panel_on (struct drm_device *dev)
+/* Returns true if the panel was already on when called */
+static bool ironlake_edp_panel_on (struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 pp;
 
 	if (I915_READ(PCH_PP_STATUS) & PP_ON)
-		return;
+		return true;
 
 	pp = I915_READ(PCH_PP_CONTROL);
 
@@ -780,6 +781,8 @@ static void ironlake_edp_panel_on (struct drm_device *dev)
 	pp |= PANEL_POWER_RESET; /* restore panel reset bit */
 	I915_WRITE(PCH_PP_CONTROL, pp);
 	POSTING_READ(PCH_PP_CONTROL);
+
+	return false;
 }
 
 static void ironlake_edp_panel_off (struct drm_device *dev)
@@ -860,7 +863,7 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
-	if (IS_eDP(intel_dp)) {
+	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
 		ironlake_edp_backlight_off(dev);
 		ironlake_edp_panel_on(dev);
 		ironlake_edp_pll_on(encoder);
@@ -1365,7 +1368,11 @@ ironlake_dp_detect(struct drm_connector *connector)
 	struct drm_encoder *encoder = intel_attached_encoder(connector);
 	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 	enum drm_connector_status status;
+	bool was_on = false;
 
+	/* Panel needs power for AUX to work */
+	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+		was_on = ironlake_edp_panel_on(connector->dev);
 	status = connector_status_disconnected;
 	if (intel_dp_aux_native_read(intel_dp,
 				     0x000, intel_dp->dpcd,
@@ -1376,6 +1383,8 @@ ironlake_dp_detect(struct drm_connector *connector)
 	}
 	DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0],
 		      intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]);
+	if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) && !was_on)
+		ironlake_edp_panel_off(connector->dev);
 	return status;
 }
 
-- 
1.6.3.3

  reply	other threads:[~2010-09-08 19:42 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-08 19:41 eDP fixes Jesse Barnes
2010-09-08 19:41 ` Jesse Barnes [this message]
2010-09-08 19:42 ` [PATCH 2/7] drm/i915: use 125MHz reference clock for PCH attached eDP Jesse Barnes
2010-09-08 19:42 ` [PATCH 3/7] drm/i915: use VDD AUX for panel power around detection and in prepare Jesse Barnes
2010-09-08 19:42 ` [PATCH 4/7] drm/i915: split DP link training across panel power sequencing Jesse Barnes
2010-09-08 19:42 ` [PATCH 5/7] drm/i915: don't change VDD AUX status in panel power functions Jesse Barnes
2010-09-08 19:42 ` [PATCH 6/7] drm/i915: make sure VDD AUX power has time to settle Jesse Barnes
2010-09-08 19:42 ` [PATCH 7/7] drm/i915: make sure panel is sequenced off when starting a mode set Jesse Barnes
2010-09-08 20:11   ` Chris Wilson

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