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 15 void 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 23 static 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 37 void 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 48 int 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 68 void 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 78 irqreturn_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 } 100 101 int 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 } 113 114 void 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 } 124