drm/nv50: rework PGPIO IRQ handling and hotplug detection

Allows callers to install their own handlers for when a GPIO line
changes state (such as for hotplug detect).

This also fixes a bug where we weren't acknowledging the GPIO IRQ
until after the bottom half had run, causing a severe IRQ storm
in some cases.

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index 262545b58d9..b26b34c419c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -396,6 +396,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->gpio.takedown           = nv50_gpio_fini;
                 engine->gpio.get                = nv50_gpio_get;
                 engine->gpio.set                = nv50_gpio_set;
+                engine->gpio.irq_register       = nv50_gpio_irq_register;
+                engine->gpio.irq_unregister     = nv50_gpio_irq_unregister;
                 engine->gpio.irq_enable         = nv50_gpio_irq_enable;
                 switch (dev_priv->chipset) {
                 case 0x84:
@@ -487,6 +489,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->gpio.takedown           = nouveau_stub_takedown;
                 engine->gpio.get                = nv50_gpio_get;
                 engine->gpio.set                = nv50_gpio_set;
+                engine->gpio.irq_register       = nv50_gpio_irq_register;
+                engine->gpio.irq_unregister     = nv50_gpio_irq_unregister;
                 engine->gpio.irq_enable         = nv50_gpio_irq_enable;
                 engine->crypt.init              = nouveau_stub_init;
                 engine->crypt.takedown          = nouveau_stub_takedown;