drm/i915: Fix up the bdw pipe interrupt enable lists

- Pipe underrun can't just be enabled, we need some support code like
  on ilk-hsw to make this happen. So drop it for now.
- CRC error is a special mode of the CRC hardware that we don't use,
  so again drop it. Real CRC support for bdw will be added later.
- All the other error bits are about faults, so rename the #define and
  adjust the output.

v2: Use pipe_name as pointed out by Ville. Ville's comment was on a
previous patch, but it was easier to squash in here.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 10 insertions, 9 deletions

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index c04fbbf0acf7..e1bfc85d1789 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1793,8 +1793,11 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg)
                         intel_finish_page_flip_plane(dev, pipe);
                 }
 
-                if (pipe_iir & GEN8_DE_PIPE_IRQ_ERRORS)
-                        DRM_ERROR("Errors on pipe %c\n", 'A' + pipe);
+                if (pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS) {
+                        DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
+                                  pipe_name(pipe),
+                                  pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS);
+                }
 
                 if (pipe_iir) {
                         ret = IRQ_HANDLED;
@@ -2863,9 +2866,8 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
 {
         struct drm_device *dev = dev_priv->dev;
         uint32_t de_pipe_enables = GEN8_PIPE_FLIP_DONE |
-                                   GEN8_PIPE_SCAN_LINE_EVENT |
                                    GEN8_PIPE_VBLANK |
-                                   GEN8_DE_PIPE_IRQ_ERRORS;
+                                   GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
         int pipe;
         dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_enables;
         dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_enables;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f150edaa64ca..9e7588345017 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4064,11 +4064,10 @@
 #define  GEN8_PIPE_SCAN_LINE_EVENT      (1 << 2)
 #define  GEN8_PIPE_VSYNC                (1 << 1)
 #define  GEN8_PIPE_VBLANK               (1 << 0)
-#define GEN8_DE_PIPE_IRQ_ERRORS (GEN8_PIPE_UNDERRUN | \
-                                 GEN8_PIPE_CDCLK_CRC_ERROR | \
-                                 GEN8_PIPE_CURSOR_FAULT | \
-                                 GEN8_PIPE_SPRITE_FAULT | \
-                                 GEN8_PIPE_PRIMARY_FAULT)
+#define GEN8_DE_PIPE_IRQ_FAULT_ERRORS \
+        (GEN8_PIPE_CURSOR_FAULT | \
+         GEN8_PIPE_SPRITE_FAULT | \
+         GEN8_PIPE_PRIMARY_FAULT)
 
 #define GEN8_DE_PORT_ISR 0x44440
 #define GEN8_DE_PORT_IMR 0x44444