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path: root/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c
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Diffstat (limited to 'drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c')
-rw-r--r--drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c
new file mode 100644
index 000000000000..b764d7f10312
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_irq.c
@@ -0,0 +1,121 @@
+/*
+ * 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 <drm/drm_print.h>
+
+#include "msm_drv.h"
+#include "mdp4_kms.h"
+
+void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
+ uint32_t old_irqmask)
+{
+ mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_CLEAR,
+ irqmask ^ (irqmask & old_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)
+{
+ struct mdp4_kms *mdp4_kms = container_of(irq, struct mdp4_kms, error_handler);
+ static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
+ extern bool dumpstate;
+
+ DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
+
+ if (dumpstate && __ratelimit(&rs)) {
+ struct drm_printer p = drm_info_printer(mdp4_kms->dev->dev);
+ drm_state_dump(mdp4_kms->dev, &p);
+ }
+}
+
+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, enable;
+
+ enable = mdp4_read(mdp4_kms, REG_MDP4_INTR_ENABLE);
+ status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS) & enable;
+ 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)
+{
+ struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+
+ mdp4_enable(mdp4_kms);
+ mdp_update_vblank_mask(to_mdp_kms(kms),
+ mdp4_crtc_vblank(crtc), true);
+ mdp4_disable(mdp4_kms);
+
+ return 0;
+}
+
+void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
+{
+ struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+
+ mdp4_enable(mdp4_kms);
+ mdp_update_vblank_mask(to_mdp_kms(kms),
+ mdp4_crtc_vblank(crtc), false);
+ mdp4_disable(mdp4_kms);
+}