drm/nv50: add function to control GPIO IRQ reporting

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv50_gpio.c b/drivers/gpu/drm/nouveau/nv50_gpio.c
index bb47ad737267..88715c5003c1 100644
--- a/drivers/gpu/drm/nouveau/nv50_gpio.c
+++ b/drivers/gpu/drm/nouveau/nv50_gpio.c
@@ -74,3 +74,22 @@ nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
         nv_wr32(dev, r, v);
         return 0;
 }
+
+void
+nv50_gpio_irq_enable(struct drm_device *dev, enum dcb_gpio_tag tag, bool on)
+{
+        struct dcb_gpio_entry *gpio;
+        u32 reg, mask;
+
+        gpio = nouveau_bios_gpio_entry(dev, tag);
+        if (!gpio) {
+                NV_ERROR(dev, "gpio tag 0x%02x not found\n", tag);
+                return;
+        }
+
+        reg  = gpio->line < 16 ? 0xe050 : 0xe070;
+        mask = 0x00010001 << (gpio->line & 0xf);
+
+        nv_wr32(dev, reg + 4, mask);
+        nv_mask(dev, reg + 0, mask, on ? mask : 0);
+}