1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2013 Red Hat
  4 * Author: Rob Clark <robdclark@gmail.com>
  5 */
  6
  7#include <linux/irq.h>
  8
  9#include <drm/drm_print.h>
 10#include <drm/drm_vblank.h>
 11
 12#include "msm_drv.h"
 13#include "mdp5_kms.h"
 14
 15void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
 16		uint32_t old_irqmask)
 17{
 18	mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
 19		   irqmask ^ (irqmask & old_irqmask));
 20	mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
 21}
 22
 23static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
 24{
 25	struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
 26	static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
 27	extern bool dumpstate;
 28
 29	DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
 30
 31	if (dumpstate && __ratelimit(&rs)) {
 32		struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
 33		drm_state_dump(mdp5_kms->dev, &p);
 34		if (mdp5_kms->smp)
 35			mdp5_smp_dump(mdp5_kms->smp, &p);
 36	}
 37}
 38
 39void mdp5_irq_preinstall(struct msm_kms *kms)
 40{
 41	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 42	struct device *dev = &mdp5_kms->pdev->dev;
 43
 44	pm_runtime_get_sync(dev);
 45	mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
 46	mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
 47	pm_runtime_put_sync(dev);
 48}
 49
 50int mdp5_irq_postinstall(struct msm_kms *kms)
 51{
 52	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
 53	struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
 54	struct device *dev = &mdp5_kms->pdev->dev;
 55	struct mdp_irq *error_handler = &mdp5_kms->error_handler;
 56
 57	error_handler->irq = mdp5_irq_error_handler;
 58	error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
 59			MDP5_IRQ_INTF1_UNDER_RUN |
 60			MDP5_IRQ_INTF2_UNDER_RUN |
 61			MDP5_IRQ_INTF3_UNDER_RUN;
 62
 63	pm_runtime_get_sync(dev);
 64	mdp_irq_register(mdp_kms, error_handler);
 65	pm_runtime_put_sync(dev);
 66
 67	return 0;
 68}
 69
 70void mdp5_irq_uninstall(struct msm_kms *kms)
 71{
 72	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 73	struct device *dev = &mdp5_kms->pdev->dev;
 74
 75	pm_runtime_get_sync(dev);
 76	mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
 77	pm_runtime_put_sync(dev);
 78}
 79
 80irqreturn_t mdp5_irq(struct msm_kms *kms)
 81{
 82	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
 83	struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
 84	struct drm_device *dev = mdp5_kms->dev;
 85	struct msm_drm_private *priv = dev->dev_private;
 86	unsigned int id;
 87	uint32_t status, enable;
 88
 89	enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
 90	status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
 91	mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
 92
 93	VERB("status=%08x", status);
 94
 95	mdp_dispatch_irqs(mdp_kms, status);
 96
 97	for (id = 0; id < priv->num_crtcs; id++)
 98		if (status & mdp5_crtc_vblank(priv->crtcs[id]))
 99			drm_handle_vblank(dev, id);
100
101	return IRQ_HANDLED;
102}
103
104int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
105{
106	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
107	struct device *dev = &mdp5_kms->pdev->dev;
108
109	pm_runtime_get_sync(dev);
110	mdp_update_vblank_mask(to_mdp_kms(kms),
111			mdp5_crtc_vblank(crtc), true);
112	pm_runtime_put_sync(dev);
113
114	return 0;
115}
116
117void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
118{
119	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
120	struct device *dev = &mdp5_kms->pdev->dev;
121
122	pm_runtime_get_sync(dev);
123	mdp_update_vblank_mask(to_mdp_kms(kms),
124			mdp5_crtc_vblank(crtc), false);
125	pm_runtime_put_sync(dev);
126}