1 /* 2 * Copyright (C) 2013 Red Hat 3 * Author: Rob Clark <robdclark@gmail.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include <drm/drm_print.h> 19 20 #include "msm_drv.h" 21 #include "mdp4_kms.h" 22 23 void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask, 24 uint32_t old_irqmask) 25 { 26 mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_CLEAR, 27 irqmask ^ (irqmask & old_irqmask)); 28 mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask); 29 } 30 31 static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus) 32 { 33 struct mdp4_kms *mdp4_kms = container_of(irq, struct mdp4_kms, error_handler); 34 static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1); 35 extern bool dumpstate; 36 37 DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus); 38 39 if (dumpstate && __ratelimit(&rs)) { 40 struct drm_printer p = drm_info_printer(mdp4_kms->dev->dev); 41 drm_state_dump(mdp4_kms->dev, &p); 42 } 43 } 44 45 void mdp4_irq_preinstall(struct msm_kms *kms) 46 { 47 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 48 mdp4_enable(mdp4_kms); 49 mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff); 50 mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000); 51 mdp4_disable(mdp4_kms); 52 } 53 54 int mdp4_irq_postinstall(struct msm_kms *kms) 55 { 56 struct mdp_kms *mdp_kms = to_mdp_kms(kms); 57 struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms); 58 struct mdp_irq *error_handler = &mdp4_kms->error_handler; 59 60 error_handler->irq = mdp4_irq_error_handler; 61 error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN | 62 MDP4_IRQ_EXTERNAL_INTF_UDERRUN; 63 64 mdp_irq_register(mdp_kms, error_handler); 65 66 return 0; 67 } 68 69 void mdp4_irq_uninstall(struct msm_kms *kms) 70 { 71 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 72 mdp4_enable(mdp4_kms); 73 mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000); 74 mdp4_disable(mdp4_kms); 75 } 76 77 irqreturn_t mdp4_irq(struct msm_kms *kms) 78 { 79 struct mdp_kms *mdp_kms = to_mdp_kms(kms); 80 struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms); 81 struct drm_device *dev = mdp4_kms->dev; 82 struct msm_drm_private *priv = dev->dev_private; 83 unsigned int id; 84 uint32_t status, enable; 85 86 enable = mdp4_read(mdp4_kms, REG_MDP4_INTR_ENABLE); 87 status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS) & enable; 88 mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status); 89 90 VERB("status=%08x", status); 91 92 mdp_dispatch_irqs(mdp_kms, status); 93 94 for (id = 0; id < priv->num_crtcs; id++) 95 if (status & mdp4_crtc_vblank(priv->crtcs[id])) 96 drm_handle_vblank(dev, id); 97 98 return IRQ_HANDLED; 99 } 100 101 int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc) 102 { 103 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 104 105 mdp4_enable(mdp4_kms); 106 mdp_update_vblank_mask(to_mdp_kms(kms), 107 mdp4_crtc_vblank(crtc), true); 108 mdp4_disable(mdp4_kms); 109 110 return 0; 111 } 112 113 void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc) 114 { 115 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 116 117 mdp4_enable(mdp4_kms); 118 mdp_update_vblank_mask(to_mdp_kms(kms), 119 mdp4_crtc_vblank(crtc), false); 120 mdp4_disable(mdp4_kms); 121 } 122