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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
*/
#include <linux/platform_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_print.h>
#include "tidss_crtc.h"
#include "tidss_dispc.h"
#include "tidss_drv.h"
#include "tidss_irq.h"
#include "tidss_plane.h"
/* call with wait_lock and dispc runtime held */
static void tidss_irq_update(struct tidss_device *tidss)
{
assert_spin_locked(&tidss->wait_lock);
dispc_set_irqenable(tidss->dispc, tidss->irq_mask);
}
void tidss_irq_enable_vblank(struct drm_crtc *crtc)
{
struct drm_device *ddev = crtc->dev;
struct tidss_device *tidss = to_tidss(ddev);
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
u32 hw_videoport = tcrtc->hw_videoport;
unsigned long flags;
spin_lock_irqsave(&tidss->wait_lock, flags);
tidss->irq_mask |= DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) |
DSS_IRQ_VP_VSYNC_ODD(hw_videoport);
tidss_irq_update(tidss);
spin_unlock_irqrestore(&tidss->wait_lock, flags);
}
void tidss_irq_disable_vblank(struct drm_crtc *crtc)
{
struct drm_device *ddev = crtc->dev;
struct tidss_device *tidss = to_tidss(ddev);
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
u32 hw_videoport = tcrtc->hw_videoport;
unsigned long flags;
spin_lock_irqsave(&tidss->wait_lock, flags);
tidss->irq_mask &= ~(DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) |
DSS_IRQ_VP_VSYNC_ODD(hw_videoport));
tidss_irq_update(tidss);
spin_unlock_irqrestore(&tidss->wait_lock, flags);
}
static irqreturn_t tidss_irq_handler(int irq, void *arg)
{
struct drm_device *ddev = (struct drm_device *)arg;
struct tidss_device *tidss = to_tidss(ddev);
unsigned int id;
dispc_irq_t irqstatus;
irqstatus = dispc_read_and_clear_irqstatus(tidss->dispc);
for (id = 0; id < tidss->num_crtcs; id++) {
struct drm_crtc *crtc = tidss->crtcs[id];
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
u32 hw_videoport = tcrtc->hw_videoport;
if (irqstatus & (DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) |
DSS_IRQ_VP_VSYNC_ODD(hw_videoport)))
tidss_crtc_vblank_irq(crtc);
if (irqstatus & (DSS_IRQ_VP_FRAME_DONE(hw_videoport)))
tidss_crtc_framedone_irq(crtc);
if (irqstatus & DSS_IRQ_VP_SYNC_LOST(hw_videoport))
tidss_crtc_error_irq(crtc, irqstatus);
}
if (irqstatus & DSS_IRQ_DEVICE_OCP_ERR)
dev_err_ratelimited(tidss->dev, "OCP error\n");
return IRQ_HANDLED;
}
void tidss_irq_resume(struct tidss_device *tidss)
{
unsigned long flags;
spin_lock_irqsave(&tidss->wait_lock, flags);
tidss_irq_update(tidss);
spin_unlock_irqrestore(&tidss->wait_lock, flags);
}
static void tidss_irq_preinstall(struct drm_device *ddev)
{
struct tidss_device *tidss = to_tidss(ddev);
spin_lock_init(&tidss->wait_lock);
tidss_runtime_get(tidss);
dispc_set_irqenable(tidss->dispc, 0);
dispc_read_and_clear_irqstatus(tidss->dispc);
tidss_runtime_put(tidss);
}
static void tidss_irq_postinstall(struct drm_device *ddev)
{
struct tidss_device *tidss = to_tidss(ddev);
unsigned long flags;
unsigned int i;
tidss_runtime_get(tidss);
spin_lock_irqsave(&tidss->wait_lock, flags);
tidss->irq_mask = DSS_IRQ_DEVICE_OCP_ERR;
for (i = 0; i < tidss->num_crtcs; ++i) {
struct tidss_crtc *tcrtc = to_tidss_crtc(tidss->crtcs[i]);
tidss->irq_mask |= DSS_IRQ_VP_SYNC_LOST(tcrtc->hw_videoport);
tidss->irq_mask |= DSS_IRQ_VP_FRAME_DONE(tcrtc->hw_videoport);
}
tidss_irq_update(tidss);
spin_unlock_irqrestore(&tidss->wait_lock, flags);
tidss_runtime_put(tidss);
}
int tidss_irq_install(struct drm_device *ddev, unsigned int irq)
{
int ret;
if (irq == IRQ_NOTCONNECTED)
return -ENOTCONN;
tidss_irq_preinstall(ddev);
ret = request_irq(irq, tidss_irq_handler, 0, ddev->driver->name, ddev);
if (ret)
return ret;
tidss_irq_postinstall(ddev);
return 0;
}
void tidss_irq_uninstall(struct drm_device *ddev)
{
struct tidss_device *tidss = to_tidss(ddev);
tidss_runtime_get(tidss);
dispc_set_irqenable(tidss->dispc, 0);
tidss_runtime_put(tidss);
free_irq(tidss->irq, ddev);
}
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