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Subject[PATCHv3 1/8] drm/omap: add framedone interrupt support
Date
This prepares framedone interrupt handling for
manual display update support.

Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
---
drivers/gpu/drm/omapdrm/omap_crtc.c | 48 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/omapdrm/omap_crtc.h | 1 +
drivers/gpu/drm/omapdrm/omap_irq.c | 25 +++++++++++++++++++
drivers/gpu/drm/omapdrm/omap_irq.h | 1 +
4 files changed, 75 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 6c4d40b824e4..b893985e4efb 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -51,6 +51,9 @@ struct omap_crtc {
bool pending;
wait_queue_head_t pending_wait;
struct drm_pending_vblank_event *event;
+
+ void (*framedone_handler)(void *);
+ void *framedone_handler_data;
};

/* -----------------------------------------------------------------------------
@@ -256,6 +259,17 @@ static int omap_crtc_dss_register_framedone(
struct omap_drm_private *priv, enum omap_channel channel,
void (*handler)(void *), void *data)
{
+ struct omap_crtc *omap_crtc = omap_crtcs[channel];
+ struct drm_device *dev = omap_crtc->base.dev;
+
+ if (omap_crtc->framedone_handler)
+ return -EBUSY;
+
+ dev_dbg(dev->dev, "register framedone %s", omap_crtc->name);
+
+ omap_crtc->framedone_handler = handler;
+ omap_crtc->framedone_handler_data = data;
+
return 0;
}

@@ -263,6 +277,16 @@ static void omap_crtc_dss_unregister_framedone(
struct omap_drm_private *priv, enum omap_channel channel,
void (*handler)(void *), void *data)
{
+ struct omap_crtc *omap_crtc = omap_crtcs[channel];
+ struct drm_device *dev = omap_crtc->base.dev;
+
+ dev_dbg(dev->dev, "unregister framedone %s", omap_crtc->name);
+
+ WARN_ON(omap_crtc->framedone_handler != handler);
+ WARN_ON(omap_crtc->framedone_handler_data != data);
+
+ omap_crtc->framedone_handler = NULL;
+ omap_crtc->framedone_handler_data = NULL;
}

static const struct dss_mgr_ops mgr_ops = {
@@ -330,6 +354,30 @@ void omap_crtc_vblank_irq(struct drm_crtc *crtc)
DBG("%s: apply done", omap_crtc->name);
}

+void omap_crtc_framedone_irq(struct drm_crtc *crtc, uint32_t irqstatus)
+{
+ struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
+
+ if (!omap_crtc->framedone_handler) {
+ dev_warn(omap_crtc->base.dev->dev, "no framedone handler?");
+ return;
+ }
+
+ omap_crtc->framedone_handler(omap_crtc->framedone_handler_data);
+
+ spin_lock(&crtc->dev->event_lock);
+ /* Send the vblank event if one has been requested. */
+ if (omap_crtc->event) {
+ drm_crtc_send_vblank_event(crtc, omap_crtc->event);
+ omap_crtc->event = NULL;
+ }
+ omap_crtc->pending = false;
+ spin_unlock(&crtc->dev->event_lock);
+
+ /* Wake up omap_atomic_complete. */
+ wake_up(&omap_crtc->pending_wait);
+}
+
static void omap_crtc_write_crtc_properties(struct drm_crtc *crtc)
{
struct omap_drm_private *priv = crtc->dev->dev_private;
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.h b/drivers/gpu/drm/omapdrm/omap_crtc.h
index eaab2d7f0324..c748adc91665 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.h
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.h
@@ -39,5 +39,6 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
int omap_crtc_wait_pending(struct drm_crtc *crtc);
void omap_crtc_error_irq(struct drm_crtc *crtc, u32 irqstatus);
void omap_crtc_vblank_irq(struct drm_crtc *crtc);
+void omap_crtc_framedone_irq(struct drm_crtc *crtc, uint32_t irqstatus);

#endif /* __OMAPDRM_CRTC_H__ */
diff --git a/drivers/gpu/drm/omapdrm/omap_irq.c b/drivers/gpu/drm/omapdrm/omap_irq.c
index c85115049f86..0171e5e74aac 100644
--- a/drivers/gpu/drm/omapdrm/omap_irq.c
+++ b/drivers/gpu/drm/omapdrm/omap_irq.c
@@ -85,6 +85,28 @@ int omap_irq_wait(struct drm_device *dev, struct omap_irq_wait *wait,
return ret == 0 ? -1 : 0;
}

+int omap_irq_enable_framedone(struct drm_crtc *crtc, bool enable)
+{
+ struct drm_device *dev = crtc->dev;
+ struct omap_drm_private *priv = dev->dev_private;
+ unsigned long flags;
+ enum omap_channel channel = omap_crtc_channel(crtc);
+ int framedone_irq =
+ priv->dispc_ops->mgr_get_framedone_irq(priv->dispc, channel);
+
+ DBG("dev=%p, crtc=%u, enable=%d", dev, channel, enable);
+
+ spin_lock_irqsave(&priv->wait_lock, flags);
+ if (enable)
+ priv->irq_mask |= framedone_irq;
+ else
+ priv->irq_mask &= ~framedone_irq;
+ omap_irq_update(dev);
+ spin_unlock_irqrestore(&priv->wait_lock, flags);
+
+ return 0;
+}
+
/**
* enable_vblank - enable vblank interrupt events
* @dev: DRM device
@@ -217,6 +239,9 @@ static irqreturn_t omap_irq_handler(int irq, void *arg)

if (irqstatus & priv->dispc_ops->mgr_get_sync_lost_irq(priv->dispc, channel))
omap_crtc_error_irq(crtc, irqstatus);
+
+ if (irqstatus & priv->dispc_ops->mgr_get_framedone_irq(priv->dispc, channel))
+ omap_crtc_framedone_irq(crtc, irqstatus);
}

omap_irq_ocp_error_handler(dev, irqstatus);
diff --git a/drivers/gpu/drm/omapdrm/omap_irq.h b/drivers/gpu/drm/omapdrm/omap_irq.h
index 9d5441468eca..02abb4ed9813 100644
--- a/drivers/gpu/drm/omapdrm/omap_irq.h
+++ b/drivers/gpu/drm/omapdrm/omap_irq.h
@@ -27,6 +27,7 @@ struct drm_device;
struct omap_irq_wait;

int omap_irq_enable_vblank(struct drm_crtc *crtc);
+int omap_irq_enable_framedone(struct drm_crtc *crtc, bool enable);
void omap_irq_disable_vblank(struct drm_crtc *crtc);
void omap_drm_irq_uninstall(struct drm_device *dev);
int omap_drm_irq_install(struct drm_device *dev);
--
2.16.2
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