diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_drv.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index 62080cf0f2da..6623ee4e3277 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -18,6 +18,7 @@ #include <drm/drm_managed.h> #include <drm/drm_module.h> #include <drm/drm_pciids.h> +#include <drm/drm_vblank.h> #include "mgag200_drv.h" @@ -84,6 +85,34 @@ resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size) return offset - 65536; } +static irqreturn_t mgag200_irq_handler(int irq, void *arg) +{ + struct drm_device *dev = arg; + struct mga_device *mdev = to_mga_device(dev); + struct drm_crtc *crtc; + u32 status, ien; + + status = RREG32(MGAREG_STATUS); + + if (status & MGAREG_STATUS_VLINEPEN) { + ien = RREG32(MGAREG_IEN); + if (!(ien & MGAREG_IEN_VLINEIEN)) + goto out; + + crtc = drm_crtc_from_index(dev, 0); + if (WARN_ON_ONCE(!crtc)) + goto out; + drm_crtc_handle_vblank(crtc); + + WREG32(MGAREG_ICLEAR, MGAREG_ICLEAR_VLINEICLR); + + return IRQ_HANDLED; + } + +out: + return IRQ_NONE; +} + /* * DRM driver */ @@ -167,6 +196,7 @@ int mgag200_device_init(struct mga_device *mdev, const struct mgag200_device_funcs *funcs) { struct drm_device *dev = &mdev->base; + struct pci_dev *pdev = to_pci_dev(dev->dev); u8 crtcext3, misc; int ret; @@ -192,6 +222,16 @@ int mgag200_device_init(struct mga_device *mdev, mutex_unlock(&mdev->rmmio_lock); + WREG32(MGAREG_IEN, 0); + WREG32(MGAREG_ICLEAR, MGAREG_ICLEAR_VLINEICLR); + + ret = devm_request_irq(&pdev->dev, pdev->irq, mgag200_irq_handler, IRQF_SHARED, + dev->driver->name, dev); + if (ret) { + drm_err(dev, "Failed to acquire interrupt, error %d\n", ret); + return ret; + } + return 0; } |