drm/radeon/kms: enable hpd support

This enabled interrupt driven hpd support for all
radeon chips.  Assuming the hpd pin is wired up
correctly, the driver will generate uevents on
digital monitor connect and disconnect and retrain
DP monitors automatically.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 2b534c528aaf..b7baf16c11d7 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -289,6 +289,7 @@ static inline uint32_t r100_irq_ack(struct radeon_device *rdev)
 int r100_irq_process(struct radeon_device *rdev)
 {
         uint32_t status, msi_rearm;
+        bool queue_hotplug = false;
 
         status = r100_irq_ack(rdev);
         if (!status) {
@@ -310,13 +311,17 @@ int r100_irq_process(struct radeon_device *rdev)
                         drm_handle_vblank(rdev->ddev, 1);
                 }
                 if (status & RADEON_FP_DETECT_STAT) {
-                        DRM_INFO("HPD1\n");
+                        queue_hotplug = true;
+                        DRM_DEBUG("HPD1\n");
                 }
                 if (status & RADEON_FP2_DETECT_STAT) {
-                        DRM_INFO("HPD2\n");
+                        queue_hotplug = true;
+                        DRM_DEBUG("HPD2\n");
                 }
                 status = r100_irq_ack(rdev);
         }
+        if (queue_hotplug)
+                queue_work(rdev->wq, &rdev->hotplug_work);
         if (rdev->msi_enabled) {
                 switch (rdev->family) {
                 case CHIP_RS400: