drm/i915: interrupt & vblank support for Ivy Bridge
Add new interrupt handling functions for Ivy Bridge.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 52ecb90..0239e99 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1266,7 +1266,15 @@
intel_modeset_gem_init(dev);
- if (HAS_PCH_SPLIT(dev)) {
+ if (IS_IVYBRIDGE(dev)) {
+ /* Share pre & uninstall handlers with ILK/SNB */
+ dev->driver->irq_handler = ivybridge_irq_handler;
+ dev->driver->irq_preinstall = ironlake_irq_preinstall;
+ dev->driver->irq_postinstall = ivybridge_irq_postinstall;
+ dev->driver->irq_uninstall = ironlake_irq_uninstall;
+ dev->driver->enable_vblank = ivybridge_enable_vblank;
+ dev->driver->disable_vblank = ivybridge_disable_vblank;
+ } else if (HAS_PCH_SPLIT(dev)) {
dev->driver->irq_handler = ironlake_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ironlake_irq_postinstall;
@@ -2011,7 +2019,7 @@
dev->driver->get_vblank_counter = i915_get_vblank_counter;
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
- if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
+ if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
dev->driver->get_vblank_counter = gm45_get_vblank_counter;
}
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 356d33d..0cf65a4 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1043,6 +1043,11 @@
extern int ironlake_irq_postinstall(struct drm_device *dev);
extern void ironlake_irq_uninstall(struct drm_device *dev);
+extern irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS);
+extern void ivybridge_irq_preinstall(struct drm_device *dev);
+extern int ivybridge_irq_postinstall(struct drm_device *dev);
+extern void ivybridge_irq_uninstall(struct drm_device *dev);
+
extern int i915_vblank_pipe_set(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int i915_vblank_pipe_get(struct drm_device *dev, void *data,
@@ -1051,6 +1056,8 @@
extern void i915_disable_vblank(struct drm_device *dev, int crtc);
extern int ironlake_enable_vblank(struct drm_device *dev, int crtc);
extern void ironlake_disable_vblank(struct drm_device *dev, int crtc);
+extern int ivybridge_enable_vblank(struct drm_device *dev, int crtc);
+extern void ivybridge_disable_vblank(struct drm_device *dev, int crtc);
extern u32 i915_get_vblank_counter(struct drm_device *dev, int crtc);
extern u32 gm45_get_vblank_counter(struct drm_device *dev, int crtc);
extern int i915_vblank_swap(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 33f0bc5..349a03e 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -462,6 +462,94 @@
DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
}
+irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
+{
+ struct drm_device *dev = (struct drm_device *) arg;
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ int ret = IRQ_NONE;
+ u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
+ struct drm_i915_master_private *master_priv;
+
+ atomic_inc(&dev_priv->irq_received);
+
+ /* disable master interrupt before clearing iir */
+ de_ier = I915_READ(DEIER);
+ I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
+ POSTING_READ(DEIER);
+
+ de_iir = I915_READ(DEIIR);
+ gt_iir = I915_READ(GTIIR);
+ pch_iir = I915_READ(SDEIIR);
+ pm_iir = I915_READ(GEN6_PMIIR);
+
+ if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && pm_iir == 0)
+ goto done;
+
+ ret = IRQ_HANDLED;
+
+ if (dev->primary->master) {
+ master_priv = dev->primary->master->driver_priv;
+ if (master_priv->sarea_priv)
+ master_priv->sarea_priv->last_dispatch =
+ READ_BREADCRUMB(dev_priv);
+ }
+
+ if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
+ notify_ring(dev, &dev_priv->ring[RCS]);
+ if (gt_iir & GT_GEN6_BSD_USER_INTERRUPT)
+ notify_ring(dev, &dev_priv->ring[VCS]);
+ if (gt_iir & GT_BLT_USER_INTERRUPT)
+ notify_ring(dev, &dev_priv->ring[BCS]);
+
+ if (de_iir & DE_GSE_IVB)
+ intel_opregion_gse_intr(dev);
+
+ if (de_iir & DE_PLANEA_FLIP_DONE_IVB) {
+ intel_prepare_page_flip(dev, 0);
+ intel_finish_page_flip_plane(dev, 0);
+ }
+
+ if (de_iir & DE_PLANEB_FLIP_DONE_IVB) {
+ intel_prepare_page_flip(dev, 1);
+ intel_finish_page_flip_plane(dev, 1);
+ }
+
+ if (de_iir & DE_PIPEA_VBLANK_IVB)
+ drm_handle_vblank(dev, 0);
+
+ if (de_iir & DE_PIPEB_VBLANK_IVB);
+ drm_handle_vblank(dev, 1);
+
+ /* check event from PCH */
+ if (de_iir & DE_PCH_EVENT_IVB) {
+ if (pch_iir & SDE_HOTPLUG_MASK_CPT)
+ queue_work(dev_priv->wq, &dev_priv->hotplug_work);
+ pch_irq_handler(dev);
+ }
+
+ if (pm_iir & GEN6_PM_DEFERRED_EVENTS) {
+ unsigned long flags;
+ spin_lock_irqsave(&dev_priv->rps_lock, flags);
+ WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n");
+ I915_WRITE(GEN6_PMIMR, pm_iir);
+ dev_priv->pm_iir |= pm_iir;
+ spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
+ queue_work(dev_priv->wq, &dev_priv->rps_work);
+ }
+
+ /* should clear PCH hotplug event before clear CPU irq */
+ I915_WRITE(SDEIIR, pch_iir);
+ I915_WRITE(GTIIR, gt_iir);
+ I915_WRITE(DEIIR, de_iir);
+ I915_WRITE(GEN6_PMIIR, pm_iir);
+
+done:
+ I915_WRITE(DEIER, de_ier);
+ POSTING_READ(DEIER);
+
+ return ret;
+}
+
irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
@@ -1406,6 +1494,22 @@
return 0;
}
+int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ unsigned long irqflags;
+
+ if (!i915_pipe_enabled(dev, pipe))
+ return -EINVAL;
+
+ spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
+ ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
+ DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB);
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+
+ return 0;
+}
+
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
@@ -1436,6 +1540,17 @@
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
+void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
+ ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
+ DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB);
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+}
+
/* Set the vblank monitor pipe
*/
int i915_vblank_pipe_set(struct drm_device *dev, void *data,
@@ -1713,6 +1828,56 @@
return 0;
}
+int ivybridge_irq_postinstall(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ /* enable kind of interrupts always enabled */
+ u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
+ DE_PCH_EVENT_IVB | DE_PLANEA_FLIP_DONE_IVB |
+ DE_PLANEB_FLIP_DONE_IVB;
+ u32 render_irqs;
+ u32 hotplug_mask;
+
+ DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue);
+ if (HAS_BSD(dev))
+ DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue);
+ if (HAS_BLT(dev))
+ DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue);
+
+ dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
+ dev_priv->irq_mask = ~display_mask;
+
+ /* should always can generate irq */
+ I915_WRITE(DEIIR, I915_READ(DEIIR));
+ I915_WRITE(DEIMR, dev_priv->irq_mask);
+ I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK_IVB |
+ DE_PIPEB_VBLANK_IVB);
+ POSTING_READ(DEIER);
+
+ dev_priv->gt_irq_mask = ~0;
+
+ I915_WRITE(GTIIR, I915_READ(GTIIR));
+ I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
+
+ render_irqs = GT_USER_INTERRUPT | GT_GEN6_BSD_USER_INTERRUPT |
+ GT_BLT_USER_INTERRUPT;
+ I915_WRITE(GTIER, render_irqs);
+ POSTING_READ(GTIER);
+
+ hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
+ SDE_PORTB_HOTPLUG_CPT |
+ SDE_PORTC_HOTPLUG_CPT |
+ SDE_PORTD_HOTPLUG_CPT);
+ dev_priv->pch_irq_mask = ~hotplug_mask;
+
+ I915_WRITE(SDEIIR, I915_READ(SDEIIR));
+ I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
+ I915_WRITE(SDEIER, hotplug_mask);
+ POSTING_READ(SDEIER);
+
+ return 0;
+}
+
void i915_driver_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ea12ca0..8f70fb6 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2778,6 +2778,19 @@
#define DE_PIPEA_VSYNC (1 << 3)
#define DE_PIPEA_FIFO_UNDERRUN (1 << 0)
+/* More Ivybridge lolz */
+#define DE_ERR_DEBUG_IVB (1<<30)
+#define DE_GSE_IVB (1<<29)
+#define DE_PCH_EVENT_IVB (1<<28)
+#define DE_DP_A_HOTPLUG_IVB (1<<27)
+#define DE_AUX_CHANNEL_A_IVB (1<<26)
+#define DE_SPRITEB_FLIP_DONE_IVB (1<<9)
+#define DE_SPRITEA_FLIP_DONE_IVB (1<<4)
+#define DE_PLANEB_FLIP_DONE_IVB (1<<8)
+#define DE_PLANEA_FLIP_DONE_IVB (1<<3)
+#define DE_PIPEB_VBLANK_IVB (1<<5)
+#define DE_PIPEA_VBLANK_IVB (1<<0)
+
#define DEISR 0x44000
#define DEIMR 0x44004
#define DEIIR 0x44008
