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#include <drm/drm_print.h>
  19
  20#include "msm_drv.h"
  21#include "mdp4_kms.h"
  22
  23void 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
  31static 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
  45void 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
  54int 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
  69void 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
  77irqreturn_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
 101int 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
 113void 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