drm/i915: Do not unmask PSR interruption in IRQ postinstall

No need to unmask PSR interrutpion if PSR is not enabled, better move
the call to intel_psr_enable_source().

v2: Renamed intel_psr_irq_control() to psr_irq_control() (Lucas)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190820223325.27490-3-jose.souza@intel.com

drivers/gpu/drm/i915/display/intel_psr.c

@@ -105,7 +105,7 @@ static int edp_psr_shift(enum transcoder cpu_transcoder)
 	}
 }
 
-void intel_psr_irq_control(struct drm_i915_private *dev_priv, u32 debug)
+static void psr_irq_control(struct drm_i915_private *dev_priv, u32 debug)
 {
 	u32 debug_mask, mask;
 	enum transcoder cpu_transcoder;
@@ -736,6 +736,8 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 		mask |= EDP_PSR_DEBUG_MASK_DISP_REG_WRITE;
 
 	I915_WRITE(EDP_PSR_DEBUG(dev_priv->psr.transcoder), mask);
+
+	psr_irq_control(dev_priv, dev_priv->psr.debug);
 }
 
 static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
@@ -1108,7 +1110,7 @@ int intel_psr_debug_set(struct drm_i915_private *dev_priv, u64 val)
 
 	old_mode = dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK;
 	dev_priv->psr.debug = val;
-	intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
+	psr_irq_control(dev_priv, dev_priv->psr.debug);
 
 	mutex_unlock(&dev_priv->psr.lock);
 

drivers/gpu/drm/i915/display/intel_psr.h

@@ -30,7 +30,6 @@ void intel_psr_flush(struct drm_i915_private *dev_priv,
 void intel_psr_init(struct drm_i915_private *dev_priv);
 void intel_psr_compute_config(struct intel_dp *intel_dp,
 			      struct intel_crtc_state *crtc_state);
-void intel_psr_irq_control(struct drm_i915_private *dev_priv, u32 debug);
 void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir);
 void intel_psr_short_pulse(struct intel_dp *intel_dp);
 int intel_psr_wait_for_idle(const struct intel_crtc_state *new_crtc_state,

drivers/gpu/drm/i915/i915_irq.c

@@ -3684,7 +3684,6 @@ static void ironlake_irq_postinstall(struct drm_i915_private *dev_priv)
 
 	if (IS_HASWELL(dev_priv)) {
 		gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
-		intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
 		display_mask |= DE_EDP_PSR_INT_HSW;
 	}
 
@@ -3795,7 +3794,6 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
 		de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
 
 	gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
-	intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
 
 	for_each_pipe(dev_priv, pipe) {
 		dev_priv->de_irq_mask[pipe] = ~de_pipe_masked;