[Intel-gfx] [PATCH] drm/i915: Be sure to turn hsync/vsync back on at crt enable (v2)

[Adam Jackson]

f40ebd6b properly disabled the hsync/vsync logic at disable time, but
neglected to re-enable them at enable time.

v2: In the enable hook, restore the connector's expected DPMS level
instead of forcing ON.  Do this by stashing a back pointer to the
connector in the crt (suggested by danvet) since otherwise it's awkward
to look up.

Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 drivers/gpu/drm/i915/intel_crt.c | 40 +++++++++++++++++-----------------------
 1 file changed, 17 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 32a3693..498dafd 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -45,6 +45,9 @@
 
 struct intel_crt {
 	struct intel_encoder base;
+	/* DPMS state is stored in the connector, which we need in the
+	 * encoder's enable/disable callbacks */
+	struct intel_connector *connector;
 	bool force_hotplug_required;
 	u32 adpa_reg;
 };
@@ -81,29 +84,6 @@ static bool intel_crt_get_hw_state(struct intel_encoder *encoder,
 	return true;
 }
 
-static void intel_disable_crt(struct intel_encoder *encoder)
-{
-	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
-	struct intel_crt *crt = intel_encoder_to_crt(encoder);
-	u32 temp;
-
-	temp = I915_READ(crt->adpa_reg);
-	temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
-	temp &= ~ADPA_DAC_ENABLE;
-	I915_WRITE(crt->adpa_reg, temp);
-}
-
-static void intel_enable_crt(struct intel_encoder *encoder)
-{
-	struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
-	struct intel_crt *crt = intel_encoder_to_crt(encoder);
-	u32 temp;
-
-	temp = I915_READ(crt->adpa_reg);
-	temp |= ADPA_DAC_ENABLE;
-	I915_WRITE(crt->adpa_reg, temp);
-}
-
 /* Note: The caller is required to filter out dpms modes not supported by the
  * platform. */
 static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
@@ -135,6 +115,19 @@ static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
 	I915_WRITE(crt->adpa_reg, temp);
 }
 
+static void intel_disable_crt(struct intel_encoder *encoder)
+{
+	intel_crt_set_dpms(encoder, DRM_MODE_DPMS_OFF);
+}
+
+static void intel_enable_crt(struct intel_encoder *encoder)
+{
+	struct intel_crt *crt = intel_encoder_to_crt(encoder);
+
+	intel_crt_set_dpms(encoder, crt->connector->dpms);
+}
+
+
 static void intel_crt_dpms(struct drm_connector *connector, int mode)
 {
 	struct drm_device *dev = connector->dev;
@@ -746,6 +739,7 @@ void intel_crt_init(struct drm_device *dev)
 	}
 
 	connector = &intel_connector->base;
+	crt->connector = connector;
 	drm_connector_init(dev, &intel_connector->base,
 			   &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 
-- 
1.8.1.4