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 13 void 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 21 static 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 35 void 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 44 int 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 59 void 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 67 irqreturn_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 90 int 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 } 101 102 void 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