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Subject[PATCH 12/20] video: msm: Add IRQ callback for MDP interface
Date
Allows interface client to setup notification for non-DMA irqs
(e.g. LCDC/TV-out frame start)

Authors:
Dima Zavin <dima@android.com>
Rebecca Schultz Zavin <rebecca@android.com>
Colin Cross <ccross@android.com>

Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>
---
drivers/video/msm/mdp.c | 41 +++++++++++++++++++++++++++++++++++++++++
drivers/video/msm/mdp_hw.h | 9 +++++++++
2 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c
index 15241b4..bdca2d9 100644
--- a/drivers/video/msm/mdp.c
+++ b/drivers/video/msm/mdp.c
@@ -130,6 +130,10 @@ static irqreturn_t mdp_isr(int irq, void *data)
}
wake_up(&out_if->dma_waitqueue);
}
+ if (status & out_if->irq_mask) {
+ out_if->irq_cb->func(out_if->irq_cb);
+ out_if->irq_cb = NULL;
+ }
}

if (status & DL0_ROI_DONE)
@@ -494,6 +498,43 @@ done:
return ret;
}

+int mdp_out_if_req_irq(struct mdp_device *mdp_dev, int interface,
+ uint32_t mask, struct msmfb_callback *cb)
+{
+ struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
+ unsigned long flags;
+ int ret = 0;
+
+ if (interface < 0 || interface >= MSM_MDP_NUM_INTERFACES) {
+ pr_err("%s: invalid interface (%d)\n", __func__, interface);
+ BUG();
+ } else if (!mdp->out_if[interface].registered) {
+ pr_err("%s: interface (%d) not registered\n", __func__,
+ interface);
+ BUG();
+ }
+
+ spin_lock_irqsave(&mdp->lock, flags);
+
+ if (mask) {
+ ret = locked_enable_mdp_irq(mdp, mask);
+ if (ret) {
+ pr_err("%s: busy\n", __func__);
+ goto done;
+ }
+ mdp->out_if[interface].irq_mask = mask;
+ mdp->out_if[interface].irq_cb = cb;
+ } else {
+ locked_disable_mdp_irq(mdp, mask);
+ mdp->out_if[interface].irq_mask = 0;
+ mdp->out_if[interface].irq_cb = NULL;
+ }
+
+done:
+ spin_unlock_irqrestore(&mdp->lock, flags);
+ return ret;
+}
+
int register_mdp_client(struct class_interface *cint)
{
if (!mdp_class) {
diff --git a/drivers/video/msm/mdp_hw.h b/drivers/video/msm/mdp_hw.h
index cc48218..acb48f5 100644
--- a/drivers/video/msm/mdp_hw.h
+++ b/drivers/video/msm/mdp_hw.h
@@ -33,6 +33,11 @@ struct mdp_out_interface {

struct msmfb_callback *dma_cb;
wait_queue_head_t dma_waitqueue;
+
+ /* If the interface client wants to be notified of non-DMA irqs,
+ * e.g. LCDC/TV-out frame start */
+ uint32_t irq_mask;
+ struct msmfb_callback *irq_cb;
};

struct mdp_info {
@@ -50,6 +55,10 @@ struct mdp_info {
extern int mdp_out_if_register(struct mdp_device *mdp_dev, int interface,
void *private_data, uint32_t dma_mask,
mdp_dma_start_func_t dma_start);
+
+extern int mdp_out_if_req_irq(struct mdp_device *mdp_dev, int interface,
+ uint32_t mask, struct msmfb_callback *cb);
+
struct mdp_blit_req;
struct mdp_device;
int mdp_ppp_blit(const struct mdp_info *mdp, struct mdp_blit_req *req,
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.


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