From: liu chuansheng chuansheng.liu@intel.com Subject: [PATCH] drm: Adding the option IRQ_ONESHOT to support irq oneshot
For some platforms, we want the irq is handled as one shot, then even when we use the irq thread, with this option, the new irq will come until the irq thread finished.
So we have the requirement for IRQ_ONESHOT.
Signed-off-by: liu chuansheng chuansheng.liu@intel.com --- drivers/gpu/drm/drm_irq.c | 3 +++ include/drm/drmP.h | 1 + 2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 03f16f3..7a8a581 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -345,6 +345,9 @@ int drm_irq_install(struct drm_device *dev) if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED)) sh_flags = IRQF_SHARED;
+ if (drm_core_check_feature(dev, DRIVER_IRQ_ONESHOT)) + sh_flags |= IRQF_ONESHOT; + if (dev->devname) irqname = dev->devname; else diff --git a/include/drm/drmP.h b/include/drm/drmP.h index d6b67bb..dfede31 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -152,6 +152,7 @@ int drm_err(const char *func, const char *format, ...); #define DRIVER_GEM 0x1000 #define DRIVER_MODESET 0x2000 #define DRIVER_PRIME 0x4000 +#define DRIVER_IRQ_ONESHOT 0x8000
#define DRIVER_BUS_PCI 0x1 #define DRIVER_BUS_PLATFORM 0x2