mirror of
https://gitee.com/open-loongarch/linux-5.10.git
synced 2026-10-28 22:17:12 +08:00
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2022 Loongson Corporation
|
|
*/
|
|
|
|
/*
|
|
* Authors:
|
|
* Sui Jingfeng <suijingfeng@loongson.cn>
|
|
*/
|
|
|
|
#include <drm/drm_vblank.h>
|
|
|
|
#include "lsdc_drv.h"
|
|
#include "lsdc_regs.h"
|
|
#include "lsdc_irq.h"
|
|
|
|
/* Function to be called in a threaded interrupt context. */
|
|
irqreturn_t lsdc_irq_thread_cb(int irq, void *arg)
|
|
{
|
|
struct drm_device *ddev = arg;
|
|
struct lsdc_device *ldev = to_lsdc(ddev);
|
|
struct drm_crtc *crtc;
|
|
|
|
/* trigger the vblank event */
|
|
if (ldev->irq_status & INT_CRTC0_VS) {
|
|
crtc = drm_crtc_from_index(ddev, 0);
|
|
drm_crtc_handle_vblank(crtc);
|
|
}
|
|
|
|
if (ldev->irq_status & INT_CRTC1_VS) {
|
|
crtc = drm_crtc_from_index(ddev, 1);
|
|
drm_crtc_handle_vblank(crtc);
|
|
}
|
|
|
|
writel(INT_CRTC0_VS_EN | INT_CRTC1_VS_EN, ldev->reg_base + LSDC_INT_REG);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* Function to be called when the IRQ occurs */
|
|
irqreturn_t lsdc_irq_handler_cb(int irq, void *arg)
|
|
{
|
|
struct drm_device *ddev = arg;
|
|
struct lsdc_device *ldev = to_lsdc(ddev);
|
|
|
|
/* Read & Clear the interrupt status */
|
|
ldev->irq_status = readl(ldev->reg_base + LSDC_INT_REG);
|
|
if ((ldev->irq_status & INT_STATUS_MASK) == 0) {
|
|
drm_warn(ddev, "no interrupt occurs\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/* clear all interrupt */
|
|
writel(ldev->irq_status, ldev->reg_base + LSDC_INT_REG);
|
|
|
|
return IRQ_WAKE_THREAD;
|
|
}
|