LXR linux/drivers/gpu/drm/msm/mdp/mdp4/mdp4

   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
  19#include "msm_drv.h"
  20#include "mdp4_kms.h"
  21
  22void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  23                uint32_t old_irqmask)
  24{
  25        mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_CLEAR,
  26                irqmask ^ (irqmask & old_irqmask));
  27        mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);
  28}
  29
  30static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  31{
  32        DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  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 msm_drm_private *priv = dev->dev_private;
  73        unsigned int id;
  74        uint32_t status, enable;
  75
  76        enable = mdp4_read(mdp4_kms, REG_MDP4_INTR_ENABLE);
  77        status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS) & enable;
  78        mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
  79
  80        VERB("status=%08x", status);
  81
  82        mdp_dispatch_irqs(mdp_kms, status);
  83
  84        for (id = 0; id < priv->num_crtcs; id++)
  85                if (status & mdp4_crtc_vblank(priv->crtcs[id]))
  86                        drm_handle_vblank(dev, id);
  87
  88        return IRQ_HANDLED;
  89}
  90
  91int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  92{
  93        struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  94
  95        mdp4_enable(mdp4_kms);
  96        mdp_update_vblank_mask(to_mdp_kms(kms),
  97                        mdp4_crtc_vblank(crtc), true);
  98        mdp4_disable(mdp4_kms);
  99
 100        return 0;
 101}
 102
 103void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 104{
 105        struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 106
 107        mdp4_enable(mdp4_kms);
 108        mdp_update_vblank_mask(to_mdp_kms(kms),
 109                        mdp4_crtc_vblank(crtc), false);
 110        mdp4_disable(mdp4_kms);
 111}
 112