mdp4_irq.c

  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 <drm/drm_print.h>
  8#include <drm/drm_vblank.h>
  9
 10#include "msm_drv.h"
 11#include "mdp4_kms.h"
 12
 13void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
 14		uint32_t old_irqmask)
 15{
 16	mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_CLEAR,
 17		irqmask ^ (irqmask & old_irqmask));
 18	mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);
 19}
 20
 21static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
 22{
 23	struct mdp4_kms *mdp4_kms = container_of(irq, struct mdp4_kms, error_handler);
 24	static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
 25	extern bool dumpstate;
 26
 27	DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
 28
 29	if (dumpstate && __ratelimit(&rs)) {
 30		struct drm_printer p = drm_info_printer(mdp4_kms->dev->dev);
 31		drm_state_dump(mdp4_kms->dev, &p);
 32	}
 33}
 34
 35void mdp4_irq_preinstall(struct msm_kms *kms)
 36{
 37	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 38	mdp4_enable(mdp4_kms);
 39	mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);
 40	mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
 41	mdp4_disable(mdp4_kms);
 42}
 43
 44int mdp4_irq_postinstall(struct msm_kms *kms)
 45{
 46	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
 47	struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
 48	struct mdp_irq *error_handler = &mdp4_kms->error_handler;
 49
 50	error_handler->irq = mdp4_irq_error_handler;
 51	error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
 52			MDP4_IRQ_EXTERNAL_INTF_UDERRUN;
 53
 54	mdp_irq_register(mdp_kms, error_handler);
 55
 56	return 0;
 57}
 58
 59void mdp4_irq_uninstall(struct msm_kms *kms)
 60{
 61	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 62	mdp4_enable(mdp4_kms);
 63	mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
 64	mdp4_disable(mdp4_kms);
 65}
 66
 67irqreturn_t mdp4_irq(struct msm_kms *kms)
 68{
 69	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
 70	struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
 71	struct drm_device *dev = mdp4_kms->dev;
 72	struct drm_crtc *crtc;
 73	uint32_t status, enable;
 74
 75	enable = mdp4_read(mdp4_kms, REG_MDP4_INTR_ENABLE);
 76	status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS) & enable;
 77	mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
 78
 79	VERB("status=%08x", status);
 80
 81	mdp_dispatch_irqs(mdp_kms, status);
 82
 83	drm_for_each_crtc(crtc, dev)
 84		if (status & mdp4_crtc_vblank(crtc))
 85			drm_crtc_handle_vblank(crtc);
 86
 87	return IRQ_HANDLED;
 88}
 89
 90int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 91{
 92	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 93
 94	mdp4_enable(mdp4_kms);
 95	mdp_update_vblank_mask(to_mdp_kms(kms),
 96			mdp4_crtc_vblank(crtc), true);
 97	mdp4_disable(mdp4_kms);
 98
 99	return 0;
100}
101
102void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
103{
104	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
105
106	mdp4_enable(mdp4_kms);
107	mdp_update_vblank_mask(to_mdp_kms(kms),
108			mdp4_crtc_vblank(crtc), false);
109	mdp4_disable(mdp4_kms);
110}