[linux-2.6-block.git] / drivers / gpu / drm / tidss / tidss_irq.c

// 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);
}
Commit	Line	Data
32a1795f JS	1	// SPDX-License-Identifier: GPL-2.0
32a1795f JS	2	/*
9410113f	3	* Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
32a1795f JS	4	* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
	5	*/
	6
5518572d TZ	7	#include <linux/platform_device.h>
	8
	9	#include <drm/drm_drv.h>
32a1795f JS	10	#include <drm/drm_print.h>
	11
	12	#include "tidss_crtc.h"
	13	#include "tidss_dispc.h"
	14	#include "tidss_drv.h"
	15	#include "tidss_irq.h"
	16	#include "tidss_plane.h"
	17
	18	/* call with wait_lock and dispc runtime held */
	19	static void tidss_irq_update(struct tidss_device *tidss)
	20	{
	21	assert_spin_locked(&tidss->wait_lock);
	22
	23	dispc_set_irqenable(tidss->dispc, tidss->irq_mask);
	24	}
	25
	26	void tidss_irq_enable_vblank(struct drm_crtc *crtc)
	27	{
	28	struct drm_device *ddev = crtc->dev;
02bb1317	29	struct tidss_device *tidss = to_tidss(ddev);
32a1795f JS	30	struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
	31	u32 hw_videoport = tcrtc->hw_videoport;
	32	unsigned long flags;
	33
	34	spin_lock_irqsave(&tidss->wait_lock, flags);
	35	tidss->irq_mask \|= DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) \|
	36	DSS_IRQ_VP_VSYNC_ODD(hw_videoport);
	37	tidss_irq_update(tidss);
	38	spin_unlock_irqrestore(&tidss->wait_lock, flags);
	39	}
	40
	41	void tidss_irq_disable_vblank(struct drm_crtc *crtc)
	42	{
	43	struct drm_device *ddev = crtc->dev;
02bb1317	44	struct tidss_device *tidss = to_tidss(ddev);
32a1795f JS	45	struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
	46	u32 hw_videoport = tcrtc->hw_videoport;
	47	unsigned long flags;
	48
	49	spin_lock_irqsave(&tidss->wait_lock, flags);
	50	tidss->irq_mask &= ~(DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) \|
	51	DSS_IRQ_VP_VSYNC_ODD(hw_videoport));
	52	tidss_irq_update(tidss);
	53	spin_unlock_irqrestore(&tidss->wait_lock, flags);
	54	}
	55
5518572d	56	static irqreturn_t tidss_irq_handler(int irq, void *arg)
32a1795f JS	57	{
32a1795f JS	58	struct drm_device ddev = (struct drm_device )arg;
02bb1317	59	struct tidss_device *tidss = to_tidss(ddev);
32a1795f JS	60	unsigned int id;
	61	dispc_irq_t irqstatus;
	62
32a1795f JS	63	irqstatus = dispc_read_and_clear_irqstatus(tidss->dispc);
	64
	65	for (id = 0; id < tidss->num_crtcs; id++) {
	66	struct drm_crtc *crtc = tidss->crtcs[id];
	67	struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
	68	u32 hw_videoport = tcrtc->hw_videoport;
	69
	70	if (irqstatus & (DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) \|
	71	DSS_IRQ_VP_VSYNC_ODD(hw_videoport)))
	72	tidss_crtc_vblank_irq(crtc);
	73
	74	if (irqstatus & (DSS_IRQ_VP_FRAME_DONE(hw_videoport)))
	75	tidss_crtc_framedone_irq(crtc);
	76
	77	if (irqstatus & DSS_IRQ_VP_SYNC_LOST(hw_videoport))
	78	tidss_crtc_error_irq(crtc, irqstatus);
	79	}
	80
	81	if (irqstatus & DSS_IRQ_DEVICE_OCP_ERR)
	82	dev_err_ratelimited(tidss->dev, "OCP error\n");
	83
	84	return IRQ_HANDLED;
	85	}
	86
	87	void tidss_irq_resume(struct tidss_device *tidss)
	88	{
	89	unsigned long flags;
	90
	91	spin_lock_irqsave(&tidss->wait_lock, flags);
	92	tidss_irq_update(tidss);
	93	spin_unlock_irqrestore(&tidss->wait_lock, flags);
	94	}
	95
5518572d	96	static void tidss_irq_preinstall(struct drm_device *ddev)
32a1795f	97	{
02bb1317	98	struct tidss_device *tidss = to_tidss(ddev);
32a1795f JS	99
	100	spin_lock_init(&tidss->wait_lock);
	101
	102	tidss_runtime_get(tidss);
	103
	104	dispc_set_irqenable(tidss->dispc, 0);
	105	dispc_read_and_clear_irqstatus(tidss->dispc);
	106
	107	tidss_runtime_put(tidss);
	108	}
	109
5518572d	110	static void tidss_irq_postinstall(struct drm_device *ddev)
32a1795f	111	{
02bb1317	112	struct tidss_device *tidss = to_tidss(ddev);
32a1795f JS	113	unsigned long flags;
	114	unsigned int i;
	115
	116	tidss_runtime_get(tidss);
	117
	118	spin_lock_irqsave(&tidss->wait_lock, flags);
	119
	120	tidss->irq_mask = DSS_IRQ_DEVICE_OCP_ERR;
	121
	122	for (i = 0; i < tidss->num_crtcs; ++i) {
	123	struct tidss_crtc *tcrtc = to_tidss_crtc(tidss->crtcs[i]);
	124
	125	tidss->irq_mask \|= DSS_IRQ_VP_SYNC_LOST(tcrtc->hw_videoport);
	126
	127	tidss->irq_mask \|= DSS_IRQ_VP_FRAME_DONE(tcrtc->hw_videoport);
	128	}
	129
	130	tidss_irq_update(tidss);
	131
	132	spin_unlock_irqrestore(&tidss->wait_lock, flags);
	133
	134	tidss_runtime_put(tidss);
5518572d TZ	135	}
	136
	137	int tidss_irq_install(struct drm_device *ddev, unsigned int irq)
	138	{
	139	int ret;
	140
	141	if (irq == IRQ_NOTCONNECTED)
	142	return -ENOTCONN;
	143
	144	tidss_irq_preinstall(ddev);
	145
	146	ret = request_irq(irq, tidss_irq_handler, 0, ddev->driver->name, ddev);
	147	if (ret)
	148	return ret;
	149
	150	tidss_irq_postinstall(ddev);
32a1795f JS	151
	152	return 0;
	153	}
	154
	155	void tidss_irq_uninstall(struct drm_device *ddev)
	156	{
02bb1317	157	struct tidss_device *tidss = to_tidss(ddev);
32a1795f JS	158
	159	tidss_runtime_get(tidss);
	160	dispc_set_irqenable(tidss->dispc, 0);
	161	tidss_runtime_put(tidss);
5518572d TZ	162
5518572d TZ	163	free_irq(tidss->irq, ddev);
32a1795f	164	}