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path: root/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
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Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_kms.c')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_kms.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 29bec974464c..26c2e9edb2b6 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -2095,3 +2095,95 @@ int vmw_kms_fbdev_init_data(struct vmw_private *dev_priv,
return 0;
}
+
+/**
+ * vmw_kms_del_active - unregister a crtc binding to the implicit framebuffer
+ *
+ * @dev_priv: Pointer to a device private struct.
+ * @du: The display unit of the crtc.
+ */
+void vmw_kms_del_active(struct vmw_private *dev_priv,
+ struct vmw_display_unit *du)
+{
+ lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex);
+
+ if (du->active_implicit) {
+ if (--(dev_priv->num_implicit) == 0)
+ dev_priv->implicit_fb = NULL;
+ du->active_implicit = false;
+ }
+}
+
+/**
+ * vmw_kms_add_active - register a crtc binding to an implicit framebuffer
+ *
+ * @vmw_priv: Pointer to a device private struct.
+ * @du: The display unit of the crtc.
+ * @vfb: The implicit framebuffer
+ *
+ * Registers a binding to an implicit framebuffer.
+ */
+void vmw_kms_add_active(struct vmw_private *dev_priv,
+ struct vmw_display_unit *du,
+ struct vmw_framebuffer *vfb)
+{
+ lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex);
+
+ WARN_ON_ONCE(!dev_priv->num_implicit && dev_priv->implicit_fb);
+
+ if (!du->active_implicit && du->is_implicit) {
+ dev_priv->implicit_fb = vfb;
+ du->active_implicit = true;
+ dev_priv->num_implicit++;
+ }
+}
+
+/**
+ * vmw_kms_screen_object_flippable - Check whether we can page-flip a crtc.
+ *
+ * @dev_priv: Pointer to device-private struct.
+ * @crtc: The crtc we want to flip.
+ *
+ * Returns true or false depending whether it's OK to flip this crtc
+ * based on the criterion that we must not have more than one implicit
+ * frame-buffer at any one time.
+ */
+bool vmw_kms_crtc_flippable(struct vmw_private *dev_priv,
+ struct drm_crtc *crtc)
+{
+ struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+
+ lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex);
+
+ if (!du->is_implicit)
+ return true;
+
+ if (dev_priv->num_implicit != 1)
+ return false;
+
+ return true;
+}
+
+/**
+ * vmw_kms_update_implicit_fb - Update the implicit fb.
+ *
+ * @dev_priv: Pointer to device-private struct.
+ * @crtc: The crtc the new implicit frame-buffer is bound to.
+ */
+void vmw_kms_update_implicit_fb(struct vmw_private *dev_priv,
+ struct drm_crtc *crtc)
+{
+ struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+ struct vmw_framebuffer *vfb;
+
+ lockdep_assert_held_once(&dev_priv->dev->mode_config.mutex);
+
+ if (!du->is_implicit)
+ return;
+
+ vfb = vmw_framebuffer_to_vfb(crtc->primary->fb);
+ WARN_ON_ONCE(dev_priv->num_implicit != 1 &&
+ dev_priv->implicit_fb != vfb);
+
+ dev_priv->implicit_fb = vfb;
+}