drm/i915: Create an ivybridge_irq_preinstall

Just duplicates ironlake_irq_preinstall for now.

v2: Add new PCH_NOP check (Damien)
Add SDEIMR comment (Damien)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Update now outdated comment.]
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 0f052f90f39a97f25f74741e89675a98989b17d5..5d5bb8ce0fb40e10c2ae315270acf56d43e69d6c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2491,6 +2491,37 @@ static void ironlake_irq_preinstall(struct drm_device *dev)
        I915_WRITE(GTIER, 0x0);
        POSTING_READ(GTIER);
 
+       /* south display irq */
+       I915_WRITE(SDEIMR, 0xffffffff);
+       /*
+        * SDEIER is also touched by the interrupt handler to work around missed
+        * PCH interrupts. Hence we can't update it after the interrupt handler
+        * is enabled - instead we unconditionally enable all PCH interrupt
+        * sources here, but then only unmask them as needed with SDEIMR.
+        */
+       I915_WRITE(SDEIER, 0xffffffff);
+       POSTING_READ(SDEIER);
+}
+
+static void ivybridge_irq_preinstall(struct drm_device *dev)
+{
+       drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+
+       atomic_set(&dev_priv->irq_received, 0);
+
+       I915_WRITE(HWSTAM, 0xeffe);
+
+       /* XXX hotplug from PCH */
+
+       I915_WRITE(DEIMR, 0xffffffff);
+       I915_WRITE(DEIER, 0x0);
+       POSTING_READ(DEIER);
+
+       /* and GT */
+       I915_WRITE(GTIMR, 0xffffffff);
+       I915_WRITE(GTIER, 0x0);
+       POSTING_READ(GTIER);
+
        if (HAS_PCH_NOP(dev))
                return;
 
@@ -3494,9 +3525,9 @@ void intel_irq_init(struct drm_device *dev)
                dev->driver->disable_vblank = valleyview_disable_vblank;
                dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
        } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
-               /* Share pre & uninstall handlers with ILK/SNB */
+               /* Share uninstall handlers with ILK/SNB */
                dev->driver->irq_handler = ivybridge_irq_handler;
-               dev->driver->irq_preinstall = ironlake_irq_preinstall;
+               dev->driver->irq_preinstall = ivybridge_irq_preinstall;
                dev->driver->irq_postinstall = ivybridge_irq_postinstall;
                dev->driver->irq_uninstall = ironlake_irq_uninstall;
                dev->driver->enable_vblank = ivybridge_enable_vblank;