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, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 60ee6a8b4f7f..7e55647f118e 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -570,6 +570,11 @@ int radeon_device_init(struct radeon_device *rdev,
         rwlock_init(&rdev->fence_drv.lock);
         INIT_LIST_HEAD(&rdev->gem.objects);
 
+        /* setup workqueue */
+        rdev->wq = create_workqueue("radeon");
+        if (rdev->wq == NULL)
+                return -ENOMEM;
+
         /* Set asic functions */
         r = radeon_asic_init(rdev);
         if (r) {
@@ -643,6 +648,7 @@ void radeon_device_fini(struct radeon_device *rdev)
         DRM_INFO("radeon: finishing device.\n");
         rdev->shutdown = true;
         radeon_fini(rdev);
+        destroy_workqueue(rdev->wq);
         vga_client_register(rdev->pdev, NULL, NULL, NULL);
         iounmap(rdev->rmmio);
         rdev->rmmio = NULL;
@@ -689,6 +695,7 @@ int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
         radeon_save_bios_scratch_regs(rdev);
 
         radeon_suspend(rdev);
+        radeon_hpd_fini(rdev);
         /* evict remaining vram memory */
         radeon_bo_evict_vram(rdev);
 
@@ -723,6 +730,8 @@ int radeon_resume_kms(struct drm_device *dev)
         fb_set_suspend(rdev->fbdev_info, 0);
         release_console_sem();
 
+        /* reset hpd state */
+        radeon_hpd_init(rdev);
         /* blat the mode back in */
         drm_helper_resume_force_mode(dev);
         return 0;