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drm/msm/dpu: add helper to get IRQ-related data
In preparation to reworking IRQ indices, move irq_tbl access to a separate helper. Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Patchwork: https://patchwork.freedesktop.org/patch/550931/ Link: https://lore.kernel.org/r/20230802100426.4184892-5-dmitry.baryshkov@linaro.org
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2 changed files with 41 additions and 19 deletions
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@ -206,6 +206,12 @@ static inline bool dpu_core_irq_is_valid(struct dpu_hw_intr *intr,
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return irq_idx >= 0 && irq_idx < intr->total_irqs;
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}
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static inline struct dpu_hw_intr_entry *dpu_core_irq_get_entry(struct dpu_hw_intr *intr,
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int irq_idx)
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{
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return &intr->irq_tbl[irq_idx];
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}
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/**
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* dpu_core_irq_callback_handler - dispatch core interrupts
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* @dpu_kms: Pointer to DPU's KMS structure
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@ -213,17 +219,19 @@ static inline bool dpu_core_irq_is_valid(struct dpu_hw_intr *intr,
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*/
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static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms, int irq_idx)
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{
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struct dpu_hw_intr_entry *irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, irq_idx);
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VERB("irq_idx=%d\n", irq_idx);
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if (!dpu_kms->hw_intr->irq_tbl[irq_idx].cb)
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if (!irq_entry->cb)
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DRM_ERROR("no registered cb, idx:%d\n", irq_idx);
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atomic_inc(&dpu_kms->hw_intr->irq_tbl[irq_idx].count);
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atomic_inc(&irq_entry->count);
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/*
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* Perform registered function callback
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*/
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dpu_kms->hw_intr->irq_tbl[irq_idx].cb(dpu_kms->hw_intr->irq_tbl[irq_idx].arg);
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irq_entry->cb(irq_entry->arg);
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}
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irqreturn_t dpu_core_irq(struct msm_kms *kms)
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@ -510,6 +518,7 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
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void (*irq_cb)(void *arg),
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void *irq_arg)
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{
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struct dpu_hw_intr_entry *irq_entry;
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unsigned long irq_flags;
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int ret;
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@ -527,15 +536,16 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
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spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
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if (unlikely(WARN_ON(dpu_kms->hw_intr->irq_tbl[irq_idx].cb))) {
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irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, irq_idx);
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if (unlikely(WARN_ON(irq_entry->cb))) {
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spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
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return -EBUSY;
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}
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trace_dpu_core_irq_register_callback(irq_idx, irq_cb);
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dpu_kms->hw_intr->irq_tbl[irq_idx].arg = irq_arg;
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dpu_kms->hw_intr->irq_tbl[irq_idx].cb = irq_cb;
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irq_entry->arg = irq_arg;
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irq_entry->cb = irq_cb;
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ret = dpu_hw_intr_enable_irq_locked(
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dpu_kms->hw_intr,
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@ -552,6 +562,7 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
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int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
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{
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struct dpu_hw_intr_entry *irq_entry;
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unsigned long irq_flags;
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int ret;
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@ -570,8 +581,9 @@ int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
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DPU_ERROR("Fail to disable IRQ for irq_idx:%d: %d\n",
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irq_idx, ret);
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dpu_kms->hw_intr->irq_tbl[irq_idx].cb = NULL;
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dpu_kms->hw_intr->irq_tbl[irq_idx].arg = NULL;
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irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, irq_idx);
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irq_entry->cb = NULL;
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irq_entry->arg = NULL;
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spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
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@ -584,14 +596,16 @@ int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
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static int dpu_debugfs_core_irq_show(struct seq_file *s, void *v)
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{
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struct dpu_kms *dpu_kms = s->private;
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struct dpu_hw_intr_entry *irq_entry;
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unsigned long irq_flags;
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int i, irq_count;
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void *cb;
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for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
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spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
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irq_count = atomic_read(&dpu_kms->hw_intr->irq_tbl[i].count);
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cb = dpu_kms->hw_intr->irq_tbl[i].cb;
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irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
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irq_count = atomic_read(&irq_entry->count);
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cb = irq_entry->cb;
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spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
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if (irq_count || cb)
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@ -614,6 +628,7 @@ void dpu_debugfs_core_irq_init(struct dpu_kms *dpu_kms,
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void dpu_core_irq_preinstall(struct msm_kms *kms)
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{
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struct dpu_kms *dpu_kms = to_dpu_kms(kms);
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struct dpu_hw_intr_entry *irq_entry;
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int i;
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pm_runtime_get_sync(&dpu_kms->pdev->dev);
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@ -621,22 +636,27 @@ void dpu_core_irq_preinstall(struct msm_kms *kms)
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dpu_disable_all_irqs(dpu_kms);
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pm_runtime_put_sync(&dpu_kms->pdev->dev);
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for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++)
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atomic_set(&dpu_kms->hw_intr->irq_tbl[i].count, 0);
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for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
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irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
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atomic_set(&irq_entry->count, 0);
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}
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}
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void dpu_core_irq_uninstall(struct msm_kms *kms)
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{
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struct dpu_kms *dpu_kms = to_dpu_kms(kms);
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struct dpu_hw_intr_entry *irq_entry;
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int i;
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if (!dpu_kms->hw_intr)
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return;
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pm_runtime_get_sync(&dpu_kms->pdev->dev);
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for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++)
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if (dpu_kms->hw_intr->irq_tbl[i].cb)
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for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
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irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
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if (irq_entry->cb)
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DPU_ERROR("irq_idx=%d still enabled/registered\n", i);
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}
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dpu_clear_irqs(dpu_kms);
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dpu_disable_all_irqs(dpu_kms);
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@ -38,6 +38,12 @@ enum dpu_hw_intr_reg {
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#define DPU_IRQ_IDX(reg_idx, offset) (reg_idx * 32 + offset)
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struct dpu_hw_intr_entry {
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void (*cb)(void *arg);
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void *arg;
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atomic_t count;
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};
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/**
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* struct dpu_hw_intr: hw interrupts handling data structure
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* @hw: virtual address mapping
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@ -57,11 +63,7 @@ struct dpu_hw_intr {
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unsigned long irq_mask;
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const struct dpu_intr_reg *intr_set;
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struct {
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void (*cb)(void *arg);
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void *arg;
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atomic_t count;
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} irq_tbl[];
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struct dpu_hw_intr_entry irq_tbl[];
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};
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/**
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