drm/radeon/kms: add pageflip ioctl support (v3)
This adds support for dri2 pageflipping.
v2: precision updates from Mario Kleiner.
v3: Multihead fixes from Mario Kleiner; missing crtc offset
add note about update pending bit on pre-avivo chips
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index a108c7e..e0d1c6d 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -71,8 +71,10 @@
rdev->irq.gui_idle = false;
for (i = 0; i < rdev->num_crtc; i++)
rdev->irq.crtc_vblank_int[i] = false;
- for (i = 0; i < 6; i++)
+ for (i = 0; i < 6; i++) {
rdev->irq.hpd[i] = false;
+ rdev->irq.pflip[i] = false;
+ }
radeon_irq_set(rdev);
/* Clear bits */
radeon_irq_process(rdev);
@@ -101,8 +103,10 @@
rdev->irq.gui_idle = false;
for (i = 0; i < rdev->num_crtc; i++)
rdev->irq.crtc_vblank_int[i] = false;
- for (i = 0; i < 6; i++)
+ for (i = 0; i < 6; i++) {
rdev->irq.hpd[i] = false;
+ rdev->irq.pflip[i] = false;
+ }
radeon_irq_set(rdev);
}
@@ -175,3 +179,34 @@
spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
}
+void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
+{
+ unsigned long irqflags;
+
+ if (crtc < 0 || crtc >= rdev->num_crtc)
+ return;
+
+ spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
+ if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) {
+ rdev->irq.pflip[crtc] = true;
+ radeon_irq_set(rdev);
+ }
+ spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
+}
+
+void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
+{
+ unsigned long irqflags;
+
+ if (crtc < 0 || crtc >= rdev->num_crtc)
+ return;
+
+ spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
+ BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0);
+ if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) {
+ rdev->irq.pflip[crtc] = false;
+ radeon_irq_set(rdev);
+ }
+ spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
+}
+