drm/radeon: add runtime PM support (v2)

This hooks radeon up to the runtime PM system to enable
dynamic power management for secondary GPUs in switchable
and powerxpress laptops.

v2: agd5f: clean up, add module parameter

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index cc9e8482cf30..ec6240b00469 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -32,6 +32,8 @@
 #include "radeon.h"
 #include "atom.h"
 
+#include <linux/pm_runtime.h>
+
 #define RADEON_WAIT_IDLE_TIMEOUT 200
 
 /**
@@ -47,8 +49,12 @@ irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
 {
         struct drm_device *dev = (struct drm_device *) arg;
         struct radeon_device *rdev = dev->dev_private;
+        irqreturn_t ret;
 
-        return radeon_irq_process(rdev);
+        ret = radeon_irq_process(rdev);
+        if (ret == IRQ_HANDLED)
+                pm_runtime_mark_last_busy(dev->dev);
+        return ret;
 }
 
 /*