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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2013 Red Hat4 * 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}111