mdp5_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 <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	}
 35}
 36
 37void mdp5_irq_preinstall(struct msm_kms *kms)
 38{
 39	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 40	struct device *dev = &mdp5_kms->pdev->dev;
 41
 42	pm_runtime_get_sync(dev);
 43	mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
 44	mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
 45	pm_runtime_put_sync(dev);
 46}
 47
 48int mdp5_irq_postinstall(struct msm_kms *kms)
 49{
 50	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
 51	struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
 52	struct device *dev = &mdp5_kms->pdev->dev;
 53	struct mdp_irq *error_handler = &mdp5_kms->error_handler;
 54
 55	error_handler->irq = mdp5_irq_error_handler;
 56	error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
 57			MDP5_IRQ_INTF1_UNDER_RUN |
 58			MDP5_IRQ_INTF2_UNDER_RUN |
 59			MDP5_IRQ_INTF3_UNDER_RUN;
 60
 61	pm_runtime_get_sync(dev);
 62	mdp_irq_register(mdp_kms, error_handler);
 63	pm_runtime_put_sync(dev);
 64
 65	return 0;
 66}
 67
 68void mdp5_irq_uninstall(struct msm_kms *kms)
 69{
 70	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 71	struct device *dev = &mdp5_kms->pdev->dev;
 72
 73	pm_runtime_get_sync(dev);
 74	mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
 75	pm_runtime_put_sync(dev);
 76}
 77
 78irqreturn_t mdp5_irq(struct msm_kms *kms)
 79{
 80	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
 81	struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
 82	struct drm_device *dev = mdp5_kms->dev;
 83	struct drm_crtc *crtc;
 84	uint32_t status, enable;
 85
 86	enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
 87	status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
 88	mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
 89
 90	VERB("status=%08x", status);
 91
 92	mdp_dispatch_irqs(mdp_kms, status);
 93
 94	drm_for_each_crtc(crtc, dev)
 95		if (status & mdp5_crtc_vblank(crtc))
 96			drm_crtc_handle_vblank(crtc);
 97
 98	return IRQ_HANDLED;
 99}
100
101int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
102{
103	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
104	struct device *dev = &mdp5_kms->pdev->dev;
105
106	pm_runtime_get_sync(dev);
107	mdp_update_vblank_mask(to_mdp_kms(kms),
108			mdp5_crtc_vblank(crtc), true);
109	pm_runtime_put_sync(dev);
110
111	return 0;
112}
113
114void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
115{
116	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
117	struct device *dev = &mdp5_kms->pdev->dev;
118
119	pm_runtime_get_sync(dev);
120	mdp_update_vblank_mask(to_mdp_kms(kms),
121			mdp5_crtc_vblank(crtc), false);
122	pm_runtime_put_sync(dev);
123}