diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c deleted file mode 100644 index d2457490930b..000000000000 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c +++ /dev/null @@ -1,256 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. - */ - -#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ - -#include <linux/debugfs.h> -#include <linux/irqdomain.h> -#include <linux/irq.h> -#include <linux/kthread.h> - -#include "dpu_core_irq.h" -#include "dpu_trace.h" - -/** - * dpu_core_irq_callback_handler - dispatch core interrupts - * @arg: private data of callback handler - * @irq_idx: interrupt index - */ -static void dpu_core_irq_callback_handler(void *arg, int irq_idx) -{ - struct dpu_kms *dpu_kms = arg; - struct dpu_irq *irq_obj = &dpu_kms->irq_obj; - struct dpu_irq_callback *cb; - - VERB("irq_idx=%d\n", irq_idx); - - if (list_empty(&irq_obj->irq_cb_tbl[irq_idx])) - DRM_ERROR("no registered cb, idx:%d\n", irq_idx); - - atomic_inc(&irq_obj->irq_counts[irq_idx]); - - /* - * Perform registered function callback - */ - list_for_each_entry(cb, &irq_obj->irq_cb_tbl[irq_idx], list) - if (cb->func) - cb->func(cb->arg, irq_idx); -} - -u32 dpu_core_irq_read(struct dpu_kms *dpu_kms, int irq_idx, bool clear) -{ - if (!dpu_kms->hw_intr || - !dpu_kms->hw_intr->ops.get_interrupt_status) - return 0; - - if (irq_idx < 0) { - DPU_ERROR("[%pS] invalid irq_idx=%d\n", - __builtin_return_address(0), irq_idx); - return 0; - } - - return dpu_kms->hw_intr->ops.get_interrupt_status(dpu_kms->hw_intr, - irq_idx, clear); -} - -int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx, - struct dpu_irq_callback *register_irq_cb) -{ - unsigned long irq_flags; - - if (!dpu_kms->irq_obj.irq_cb_tbl) { - DPU_ERROR("invalid params\n"); - return -EINVAL; - } - - if (!register_irq_cb || !register_irq_cb->func) { - DPU_ERROR("invalid irq_cb:%d func:%d\n", - register_irq_cb != NULL, - register_irq_cb ? - register_irq_cb->func != NULL : -1); - return -EINVAL; - } - - if (irq_idx < 0 || irq_idx >= dpu_kms->hw_intr->total_irqs) { - DPU_ERROR("invalid IRQ index: [%d]\n", irq_idx); - return -EINVAL; - } - - VERB("[%pS] irq_idx=%d\n", __builtin_return_address(0), irq_idx); - - irq_flags = dpu_kms->hw_intr->ops.lock(dpu_kms->hw_intr); - trace_dpu_core_irq_register_callback(irq_idx, register_irq_cb); - list_del_init(®ister_irq_cb->list); - list_add_tail(®ister_irq_cb->list, - &dpu_kms->irq_obj.irq_cb_tbl[irq_idx]); - if (list_is_first(®ister_irq_cb->list, - &dpu_kms->irq_obj.irq_cb_tbl[irq_idx])) { - int ret = dpu_kms->hw_intr->ops.enable_irq_locked( - dpu_kms->hw_intr, - irq_idx); - if (ret) - DPU_ERROR("Fail to enable IRQ for irq_idx:%d\n", - irq_idx); - } - dpu_kms->hw_intr->ops.unlock(dpu_kms->hw_intr, irq_flags); - - return 0; -} - -int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx, - struct dpu_irq_callback *register_irq_cb) -{ - unsigned long irq_flags; - - if (!dpu_kms->irq_obj.irq_cb_tbl) { - DPU_ERROR("invalid params\n"); - return -EINVAL; - } - - if (!register_irq_cb || !register_irq_cb->func) { - DPU_ERROR("invalid irq_cb:%d func:%d\n", - register_irq_cb != NULL, - register_irq_cb ? - register_irq_cb->func != NULL : -1); - return -EINVAL; - } - - if (irq_idx < 0 || irq_idx >= dpu_kms->hw_intr->total_irqs) { - DPU_ERROR("invalid IRQ index: [%d]\n", irq_idx); - return -EINVAL; - } - - VERB("[%pS] irq_idx=%d\n", __builtin_return_address(0), irq_idx); - - irq_flags = dpu_kms->hw_intr->ops.lock(dpu_kms->hw_intr); - trace_dpu_core_irq_unregister_callback(irq_idx, register_irq_cb); - list_del_init(®ister_irq_cb->list); - /* empty callback list but interrupt is still enabled */ - if (list_empty(&dpu_kms->irq_obj.irq_cb_tbl[irq_idx])) { - int ret = dpu_kms->hw_intr->ops.disable_irq_locked( - dpu_kms->hw_intr, - irq_idx); - if (ret) - DPU_ERROR("Fail to disable IRQ for irq_idx:%d\n", - irq_idx); - VERB("irq_idx=%d ret=%d\n", irq_idx, ret); - } - dpu_kms->hw_intr->ops.unlock(dpu_kms->hw_intr, irq_flags); - - return 0; -} - -static void dpu_clear_all_irqs(struct dpu_kms *dpu_kms) -{ - if (!dpu_kms->hw_intr || !dpu_kms->hw_intr->ops.clear_all_irqs) - return; - - dpu_kms->hw_intr->ops.clear_all_irqs(dpu_kms->hw_intr); -} - -static void dpu_disable_all_irqs(struct dpu_kms *dpu_kms) -{ - if (!dpu_kms->hw_intr || !dpu_kms->hw_intr->ops.disable_all_irqs) - return; - - dpu_kms->hw_intr->ops.disable_all_irqs(dpu_kms->hw_intr); -} - -#ifdef CONFIG_DEBUG_FS -static int dpu_debugfs_core_irq_show(struct seq_file *s, void *v) -{ - struct dpu_kms *dpu_kms = s->private; - struct dpu_irq *irq_obj = &dpu_kms->irq_obj; - struct dpu_irq_callback *cb; - unsigned long irq_flags; - int i, irq_count, cb_count; - - if (WARN_ON(!irq_obj->irq_cb_tbl)) - return 0; - - for (i = 0; i < irq_obj->total_irqs; i++) { - irq_flags = dpu_kms->hw_intr->ops.lock(dpu_kms->hw_intr); - cb_count = 0; - irq_count = atomic_read(&irq_obj->irq_counts[i]); - list_for_each_entry(cb, &irq_obj->irq_cb_tbl[i], list) - cb_count++; - dpu_kms->hw_intr->ops.unlock(dpu_kms->hw_intr, irq_flags); - - if (irq_count || cb_count) - seq_printf(s, "idx:%d irq:%d cb:%d\n", - i, irq_count, cb_count); - } - - return 0; -} - -DEFINE_SHOW_ATTRIBUTE(dpu_debugfs_core_irq); - -void dpu_debugfs_core_irq_init(struct dpu_kms *dpu_kms, - struct dentry *parent) -{ - debugfs_create_file("core_irq", 0600, parent, dpu_kms, - &dpu_debugfs_core_irq_fops); -} -#endif - -void dpu_core_irq_preinstall(struct dpu_kms *dpu_kms) -{ - int i; - - pm_runtime_get_sync(&dpu_kms->pdev->dev); - dpu_clear_all_irqs(dpu_kms); - dpu_disable_all_irqs(dpu_kms); - pm_runtime_put_sync(&dpu_kms->pdev->dev); - - /* Create irq callbacks for all possible irq_idx */ - dpu_kms->irq_obj.total_irqs = dpu_kms->hw_intr->total_irqs; - dpu_kms->irq_obj.irq_cb_tbl = kcalloc(dpu_kms->irq_obj.total_irqs, - sizeof(struct list_head), GFP_KERNEL); - dpu_kms->irq_obj.irq_counts = kcalloc(dpu_kms->irq_obj.total_irqs, - sizeof(atomic_t), GFP_KERNEL); - for (i = 0; i < dpu_kms->irq_obj.total_irqs; i++) { - INIT_LIST_HEAD(&dpu_kms->irq_obj.irq_cb_tbl[i]); - atomic_set(&dpu_kms->irq_obj.irq_counts[i], 0); - } -} - -void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms) -{ - int i; - - pm_runtime_get_sync(&dpu_kms->pdev->dev); - for (i = 0; i < dpu_kms->irq_obj.total_irqs; i++) - if (!list_empty(&dpu_kms->irq_obj.irq_cb_tbl[i])) - DPU_ERROR("irq_idx=%d still enabled/registered\n", i); - - dpu_clear_all_irqs(dpu_kms); - dpu_disable_all_irqs(dpu_kms); - pm_runtime_put_sync(&dpu_kms->pdev->dev); - - kfree(dpu_kms->irq_obj.irq_cb_tbl); - kfree(dpu_kms->irq_obj.irq_counts); - dpu_kms->irq_obj.irq_cb_tbl = NULL; - dpu_kms->irq_obj.irq_counts = NULL; - dpu_kms->irq_obj.total_irqs = 0; -} - -irqreturn_t dpu_core_irq(struct dpu_kms *dpu_kms) -{ - /* - * Dispatch to HW driver to handle interrupt lookup that is being - * fired. When matching interrupt is located, HW driver will call to - * dpu_core_irq_callback_handler with the irq_idx from the lookup table. - * dpu_core_irq_callback_handler will perform the registered function - * callback, and do the interrupt status clearing once the registered - * callback is finished. - * Function will also clear the interrupt status after reading. - */ - dpu_kms->hw_intr->ops.dispatch_irqs( - dpu_kms->hw_intr, - dpu_core_irq_callback_handler, - dpu_kms); - - return IRQ_HANDLED; -} |