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>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index c11715fb..250ec3f 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2674,6 +2674,7 @@
u32 last_entry = rdev->ih.ring_size - 16;
u32 ring_index, disp_int, disp_int_cont, disp_int_cont2;
unsigned long flags;
+ bool queue_hotplug = false;
DRM_DEBUG("r600_irq_process start: rptr %d, wptr %d\n", rptr, wptr);
@@ -2745,37 +2746,43 @@
case 0:
if (disp_int & DC_HPD1_INTERRUPT) {
disp_int &= ~DC_HPD1_INTERRUPT;
- DRM_INFO("IH: HPD1\n");
+ queue_hotplug = true;
+ DRM_DEBUG("IH: HPD1\n");
}
break;
case 1:
if (disp_int & DC_HPD2_INTERRUPT) {
disp_int &= ~DC_HPD2_INTERRUPT;
- DRM_INFO("IH: HPD2\n");
+ queue_hotplug = true;
+ DRM_DEBUG("IH: HPD2\n");
}
break;
case 4:
if (disp_int_cont & DC_HPD3_INTERRUPT) {
disp_int_cont &= ~DC_HPD3_INTERRUPT;
- DRM_INFO("IH: HPD3\n");
+ queue_hotplug = true;
+ DRM_DEBUG("IH: HPD3\n");
}
break;
case 5:
if (disp_int_cont & DC_HPD4_INTERRUPT) {
disp_int_cont &= ~DC_HPD4_INTERRUPT;
- DRM_INFO("IH: HPD4\n");
+ queue_hotplug = true;
+ DRM_DEBUG("IH: HPD4\n");
}
break;
case 10:
if (disp_int_cont2 & DC_HPD5_INTERRUPT) {
disp_int_cont &= ~DC_HPD5_INTERRUPT;
- DRM_INFO("IH: HPD5\n");
+ queue_hotplug = true;
+ DRM_DEBUG("IH: HPD5\n");
}
break;
case 12:
if (disp_int_cont2 & DC_HPD6_INTERRUPT) {
disp_int_cont &= ~DC_HPD6_INTERRUPT;
- DRM_INFO("IH: HPD6\n");
+ queue_hotplug = true;
+ DRM_DEBUG("IH: HPD6\n");
}
break;
default:
@@ -2807,6 +2814,8 @@
wptr = r600_get_ih_wptr(rdev);
if (wptr != rdev->ih.wptr)
goto restart_ih;
+ if (queue_hotplug)
+ queue_work(rdev->wq, &rdev->hotplug_work);
rdev->ih.rptr = rptr;
WREG32(IH_RB_RPTR, rdev->ih.rptr);
spin_unlock_irqrestore(&rdev->ih.lock, flags);
