LXR linux/drivers/gpu/drm/msm/disp/mdp5/mdp5

   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 <linux/irq.h>
  19
  20#include <drm/drm_print.h>
  21
  22#include "msm_drv.h"
  23#include "mdp5_kms.h"
  24
  25void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  26                uint32_t old_irqmask)
  27{
  28        mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
  29                   irqmask ^ (irqmask & old_irqmask));
  30        mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
  31}
  32
  33static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  34{
  35        struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
  36        static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
  37        extern bool dumpstate;
  38
  39        DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  40
  41        if (dumpstate && __ratelimit(&rs)) {
  42                struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
  43                drm_state_dump(mdp5_kms->dev, &p);
  44                if (mdp5_kms->smp)
  45                        mdp5_smp_dump(mdp5_kms->smp, &p);
  46        }
  47}
  48
  49void mdp5_irq_preinstall(struct msm_kms *kms)
  50{
  51        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  52        struct device *dev = &mdp5_kms->pdev->dev;
  53
  54        pm_runtime_get_sync(dev);
  55        mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
  56        mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  57        pm_runtime_put_sync(dev);
  58}
  59
  60int mdp5_irq_postinstall(struct msm_kms *kms)
  61{
  62        struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  63        struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  64        struct device *dev = &mdp5_kms->pdev->dev;
  65        struct mdp_irq *error_handler = &mdp5_kms->error_handler;
  66
  67        error_handler->irq = mdp5_irq_error_handler;
  68        error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
  69                        MDP5_IRQ_INTF1_UNDER_RUN |
  70                        MDP5_IRQ_INTF2_UNDER_RUN |
  71                        MDP5_IRQ_INTF3_UNDER_RUN;
  72
  73        pm_runtime_get_sync(dev);
  74        mdp_irq_register(mdp_kms, error_handler);
  75        pm_runtime_put_sync(dev);
  76
  77        return 0;
  78}
  79
  80void mdp5_irq_uninstall(struct msm_kms *kms)
  81{
  82        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  83        struct device *dev = &mdp5_kms->pdev->dev;
  84
  85        pm_runtime_get_sync(dev);
  86        mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  87        pm_runtime_put_sync(dev);
  88}
  89
  90irqreturn_t mdp5_irq(struct msm_kms *kms)
  91{
  92        struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  93        struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  94        struct drm_device *dev = mdp5_kms->dev;
  95        struct msm_drm_private *priv = dev->dev_private;
  96        unsigned int id;
  97        uint32_t status, enable;
  98
  99        enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
 100        status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
 101        mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
 102
 103        VERB("status=%08x", status);
 104
 105        mdp_dispatch_irqs(mdp_kms, status);
 106
 107        for (id = 0; id < priv->num_crtcs; id++)
 108                if (status & mdp5_crtc_vblank(priv->crtcs[id]))
 109                        drm_handle_vblank(dev, id);
 110
 111        return IRQ_HANDLED;
 112}
 113
 114int mdp5_enable_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), true);
 122        pm_runtime_put_sync(dev);
 123
 124        return 0;
 125}
 126
 127void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 128{
 129        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 130        struct device *dev = &mdp5_kms->pdev->dev;
 131
 132        pm_runtime_get_sync(dev);
 133        mdp_update_vblank_mask(to_mdp_kms(kms),
 134                        mdp5_crtc_vblank(crtc), false);
 135        pm_runtime_put_sync(dev);
 136}
 137