drm/i915/skl: Make gen8_irq_power_well_post_enable() take a pipe mask

While we only need to restore pipe B/C interrupt registers on BDW when
enabling the power well, skylake a bit more flexible and we'll also need
to restore the pipe A registers as it has its own power well that can be
toggled.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 9baecb7..d77a4b6 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3169,15 +3169,20 @@ static void gen8_irq_reset(struct drm_device *dev)
        ibx_irq_reset(dev);
 }
 
-void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv)
+void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
+                                    unsigned int pipe_mask)
 {
        uint32_t extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
 
        spin_lock_irq(&dev_priv->irq_lock);
-       GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_B, dev_priv->de_irq_mask[PIPE_B],
-                         ~dev_priv->de_irq_mask[PIPE_B] | extra_ier);
-       GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_C, dev_priv->de_irq_mask[PIPE_C],
-                         ~dev_priv->de_irq_mask[PIPE_C] | extra_ier);
+       if (pipe_mask & 1 << PIPE_B)
+               GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_B,
+                                 dev_priv->de_irq_mask[PIPE_B],
+                                 ~dev_priv->de_irq_mask[PIPE_B] | extra_ier);
+       if (pipe_mask & 1 << PIPE_C)
+               GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_C,
+                                 dev_priv->de_irq_mask[PIPE_C],
+                                 ~dev_priv->de_irq_mask[PIPE_C] | extra_ier);
        spin_unlock_irq(&dev_priv->irq_lock);
 }
 

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index ff79dca..c77128c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -840,7 +840,8 @@ static inline bool intel_irqs_enabled(struct drm_i915_private *dev_priv)
 }
 
 int intel_get_crtc_scanline(struct intel_crtc *crtc);
-void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv);
+void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
+                                    unsigned int pipe_mask);
 
 /* intel_crt.c */
 void intel_crt_init(struct drm_device *dev);

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 6d8e29a..35e0cb6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -195,7 +195,8 @@ static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
        vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
 
        if (IS_BROADWELL(dev) || (INTEL_INFO(dev)->gen >= 9))
-               gen8_irq_power_well_post_enable(dev_priv);
+               gen8_irq_power_well_post_enable(dev_priv,
+                                               1 << PIPE_C | 1 << PIPE_B);
 }
 
 static void hsw_set_power_well(struct drm_i915_private *dev_priv,