diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 67 |
1 files changed, 62 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 87b6b603469e..ee7ce7b78cf7 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -48,10 +48,6 @@ /** Interrupts that we mask and unmask at runtime. */ #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT) -/** These are all of the interrupts used by the driver */ -#define I915_INTERRUPT_ENABLE_MASK (I915_INTERRUPT_ENABLE_FIX | \ - I915_INTERRUPT_ENABLE_VAR) - #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ PIPE_VBLANK_INTERRUPT_STATUS) @@ -187,6 +183,19 @@ u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) return I915_READ(reg); } +/* + * Handle hotplug events outside the interrupt handler proper. + */ +static void i915_hotplug_work_func(struct work_struct *work) +{ + drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, + hotplug_work); + struct drm_device *dev = dev_priv->dev; + + /* Just fire off a uevent and let userspace tell us what to do */ + drm_sysfs_hotplug_event(dev); +} + irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; @@ -244,6 +253,20 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) ret = IRQ_HANDLED; + /* Consume port. Then clear IIR or we'll miss events */ + if ((I915_HAS_HOTPLUG(dev)) && + (iir & I915_DISPLAY_PORT_INTERRUPT)) { + u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); + + DRM_DEBUG("hotplug event received, stat 0x%08x\n", + hotplug_status); + if (hotplug_status & dev_priv->hotplug_supported_mask) + schedule_work(&dev_priv->hotplug_work); + + I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); + I915_READ(PORT_HOTPLUG_STAT); + } + I915_WRITE(IIR, iir); new_iir = I915_READ(IIR); /* Flush posted writes */ @@ -528,17 +551,24 @@ void i915_driver_irq_preinstall(struct drm_device * dev) atomic_set(&dev_priv->irq_received, 0); + if (I915_HAS_HOTPLUG(dev)) { + I915_WRITE(PORT_HOTPLUG_EN, 0); + I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); + } + I915_WRITE(HWSTAM, 0xeffe); I915_WRITE(PIPEASTAT, 0); I915_WRITE(PIPEBSTAT, 0); I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); (void) I915_READ(IER); + INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); } int i915_driver_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; + u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; @@ -550,13 +580,35 @@ int i915_driver_irq_postinstall(struct drm_device *dev) dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; + if (I915_HAS_HOTPLUG(dev)) { + u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); + + /* Leave other bits alone */ + hotplug_en |= HOTPLUG_EN_MASK; + I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); + + dev_priv->hotplug_supported_mask = CRT_HOTPLUG_INT_STATUS | + TV_HOTPLUG_INT_STATUS | SDVOC_HOTPLUG_INT_STATUS | + SDVOB_HOTPLUG_INT_STATUS; + if (IS_G4X(dev)) { + dev_priv->hotplug_supported_mask |= + HDMIB_HOTPLUG_INT_STATUS | + HDMIC_HOTPLUG_INT_STATUS | + HDMID_HOTPLUG_INT_STATUS; + } + /* Enable in IER... */ + enable_mask |= I915_DISPLAY_PORT_INTERRUPT; + /* and unmask in IMR */ + i915_enable_irq(dev_priv, I915_DISPLAY_PORT_INTERRUPT); + } + /* Disable pipe interrupt enables, clear pending pipe status */ I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); /* Clear pending interrupt status */ I915_WRITE(IIR, I915_READ(IIR)); - I915_WRITE(IER, I915_INTERRUPT_ENABLE_MASK); + I915_WRITE(IER, enable_mask); I915_WRITE(IMR, dev_priv->irq_mask_reg); (void) I915_READ(IER); @@ -575,6 +627,11 @@ void i915_driver_irq_uninstall(struct drm_device * dev) dev_priv->vblank_pipe = 0; + if (I915_HAS_HOTPLUG(dev)) { + I915_WRITE(PORT_HOTPLUG_EN, 0); + I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); + } + I915_WRITE(HWSTAM, 0xffffffff); I915_WRITE(PIPEASTAT, 0); I915_WRITE(PIPEBSTAT, 0); |