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path: root/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
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Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c')
-rw-r--r--drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c56
1 files changed, 55 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
index 6a0a74832fb6..49bd77a755aa 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
@@ -223,9 +223,11 @@ static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms, unsigned int
VERB("IRQ=[%d, %d]\n", DPU_IRQ_REG(irq_idx), DPU_IRQ_BIT(irq_idx));
- if (!irq_entry->cb)
+ if (!irq_entry->cb) {
DRM_ERROR("no registered cb, IRQ=[%d, %d]\n",
DPU_IRQ_REG(irq_idx), DPU_IRQ_BIT(irq_idx));
+ return;
+ }
atomic_inc(&irq_entry->count);
@@ -235,6 +237,11 @@ static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms, unsigned int
irq_entry->cb(irq_entry->arg);
}
+/**
+ * dpu_core_irq - core IRQ handler
+ * @kms: MSM KMS handle
+ * @return: interrupt handling status
+ */
irqreturn_t dpu_core_irq(struct msm_kms *kms)
{
struct dpu_kms *dpu_kms = to_dpu_kms(kms);
@@ -440,6 +447,12 @@ static void dpu_disable_all_irqs(struct dpu_kms *dpu_kms)
wmb();
}
+/**
+ * dpu_core_irq_read - IRQ helper function for reading IRQ status
+ * @dpu_kms: DPU handle
+ * @irq_idx: irq index
+ * @return: non-zero if irq detected; otherwise no irq detected
+ */
u32 dpu_core_irq_read(struct dpu_kms *dpu_kms,
unsigned int irq_idx)
{
@@ -474,6 +487,12 @@ u32 dpu_core_irq_read(struct dpu_kms *dpu_kms,
return intr_status;
}
+/**
+ * dpu_hw_intr_init(): Initializes the interrupts hw object
+ * @dev: Corresponding device for devres management
+ * @addr: mapped register io address of MDP
+ * @m: pointer to MDSS catalog data
+ */
struct dpu_hw_intr *dpu_hw_intr_init(struct drm_device *dev,
void __iomem *addr,
const struct dpu_mdss_cfg *m)
@@ -515,6 +534,17 @@ struct dpu_hw_intr *dpu_hw_intr_init(struct drm_device *dev,
return intr;
}
+/**
+ * dpu_core_irq_register_callback - For registering callback function on IRQ
+ * interrupt
+ * @dpu_kms: DPU handle
+ * @irq_idx: irq index
+ * @irq_cb: IRQ callback function.
+ * @irq_arg: IRQ callback argument.
+ * @return: 0 for success registering callback, otherwise failure
+ *
+ * This function supports registration of multiple callbacks for each interrupt.
+ */
int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms,
unsigned int irq_idx,
void (*irq_cb)(void *arg),
@@ -565,6 +595,15 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms,
return 0;
}
+/**
+ * dpu_core_irq_unregister_callback - For unregistering callback function on IRQ
+ * interrupt
+ * @dpu_kms: DPU handle
+ * @irq_idx: irq index
+ * @return: 0 for success registering callback, otherwise failure
+ *
+ * This function supports registration of multiple callbacks for each interrupt.
+ */
int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms,
unsigned int irq_idx)
{
@@ -626,6 +665,11 @@ static int dpu_debugfs_core_irq_show(struct seq_file *s, void *v)
DEFINE_SHOW_ATTRIBUTE(dpu_debugfs_core_irq);
+/**
+ * dpu_debugfs_core_irq_init - register core irq debugfs
+ * @dpu_kms: pointer to kms
+ * @parent: debugfs directory root
+ */
void dpu_debugfs_core_irq_init(struct dpu_kms *dpu_kms,
struct dentry *parent)
{
@@ -634,6 +678,11 @@ void dpu_debugfs_core_irq_init(struct dpu_kms *dpu_kms,
}
#endif
+/**
+ * dpu_core_irq_preinstall - perform pre-installation of core IRQ handler
+ * @kms: MSM KMS handle
+ * @return: none
+ */
void dpu_core_irq_preinstall(struct msm_kms *kms)
{
struct dpu_kms *dpu_kms = to_dpu_kms(kms);
@@ -651,6 +700,11 @@ void dpu_core_irq_preinstall(struct msm_kms *kms)
}
}
+/**
+ * dpu_core_irq_uninstall - uninstall core IRQ handler
+ * @kms: MSM KMS handle
+ * @return: none
+ */
void dpu_core_irq_uninstall(struct msm_kms *kms)
{
struct dpu_kms *dpu_kms = to_dpu_kms(kms);