Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / msm / mdp / mdp4 / mdp4_irq.c

diff --git a/kernel/drivers/gpu/drm/msm/mdp/mdp4/mdp4_irq.c b/kernel/drivers/gpu/drm/msm/mdp/mdp4/mdp4_irq.c
new file mode 100644 (file)
index 0000000..7369ee7
--- /dev/null
+++ b/kernel/drivers/gpu/drm/msm/mdp/mdp4/mdp4_irq.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "msm_drv.h"
+#include "mdp4_kms.h"
+
+void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask)
+{
+       mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);
+}
+
+static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
+{
+       DRM_ERROR("errors: %08x\n", irqstatus);
+}
+
+void mdp4_irq_preinstall(struct msm_kms *kms)
+{
+       struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+       mdp4_enable(mdp4_kms);
+       mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);
+       mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
+       mdp4_disable(mdp4_kms);
+}
+
+int mdp4_irq_postinstall(struct msm_kms *kms)
+{
+       struct mdp_kms *mdp_kms = to_mdp_kms(kms);
+       struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
+       struct mdp_irq *error_handler = &mdp4_kms->error_handler;
+
+       error_handler->irq = mdp4_irq_error_handler;
+       error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
+                       MDP4_IRQ_EXTERNAL_INTF_UDERRUN;
+
+       mdp_irq_register(mdp_kms, error_handler);
+
+       return 0;
+}
+
+void mdp4_irq_uninstall(struct msm_kms *kms)
+{
+       struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+       mdp4_enable(mdp4_kms);
+       mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
+       mdp4_disable(mdp4_kms);
+}
+
+irqreturn_t mdp4_irq(struct msm_kms *kms)
+{
+       struct mdp_kms *mdp_kms = to_mdp_kms(kms);
+       struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
+       struct drm_device *dev = mdp4_kms->dev;
+       struct msm_drm_private *priv = dev->dev_private;
+       unsigned int id;
+       uint32_t status;
+
+       status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS);
+       mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
+
+       VERB("status=%08x", status);
+
+       mdp_dispatch_irqs(mdp_kms, status);
+
+       for (id = 0; id < priv->num_crtcs; id++)
+               if (status & mdp4_crtc_vblank(priv->crtcs[id]))
+                       drm_handle_vblank(dev, id);
+
+       return IRQ_HANDLED;
+}
+
+int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
+{
+       mdp_update_vblank_mask(to_mdp_kms(kms),
+                       mdp4_crtc_vblank(crtc), true);
+       return 0;
+}
+
+void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
+{
+       mdp_update_vblank_mask(to_mdp_kms(kms),
+                       mdp4_crtc_vblank(crtc), false);
+}