LXR linux/drivers/gpu/drm/msm/mdp/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 "msm_drv.h"
  21#include "mdp5_kms.h"
  22
  23void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  24                uint32_t old_irqmask)
  25{
  26        mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
  27                   irqmask ^ (irqmask & old_irqmask));
  28        mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
  29}
  30
  31static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  32{
  33        DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  34}
  35
  36void mdp5_irq_preinstall(struct msm_kms *kms)
  37{
  38        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  39        mdp5_enable(mdp5_kms);
  40        mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
  41        mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  42        mdp5_disable(mdp5_kms);
  43}
  44
  45int mdp5_irq_postinstall(struct msm_kms *kms)
  46{
  47        struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  48        struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  49        struct mdp_irq *error_handler = &mdp5_kms->error_handler;
  50
  51        error_handler->irq = mdp5_irq_error_handler;
  52        error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
  53                        MDP5_IRQ_INTF1_UNDER_RUN |
  54                        MDP5_IRQ_INTF2_UNDER_RUN |
  55                        MDP5_IRQ_INTF3_UNDER_RUN;
  56
  57        mdp5_enable(mdp5_kms);
  58        mdp_irq_register(mdp_kms, error_handler);
  59        mdp5_disable(mdp5_kms);
  60
  61        return 0;
  62}
  63
  64void mdp5_irq_uninstall(struct msm_kms *kms)
  65{
  66        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  67        mdp5_enable(mdp5_kms);
  68        mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  69        mdp5_disable(mdp5_kms);
  70}
  71
  72irqreturn_t mdp5_irq(struct msm_kms *kms)
  73{
  74        struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  75        struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  76        struct drm_device *dev = mdp5_kms->dev;
  77        struct msm_drm_private *priv = dev->dev_private;
  78        unsigned int id;
  79        uint32_t status, enable;
  80
  81        enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
  82        status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
  83        mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
  84
  85        VERB("status=%08x", status);
  86
  87        mdp_dispatch_irqs(mdp_kms, status);
  88
  89        for (id = 0; id < priv->num_crtcs; id++)
  90                if (status & mdp5_crtc_vblank(priv->crtcs[id]))
  91                        drm_handle_vblank(dev, id);
  92
  93        return IRQ_HANDLED;
  94}
  95
  96int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  97{
  98        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  99
 100        mdp5_enable(mdp5_kms);
 101        mdp_update_vblank_mask(to_mdp_kms(kms),
 102                        mdp5_crtc_vblank(crtc), true);
 103        mdp5_disable(mdp5_kms);
 104
 105        return 0;
 106}
 107
 108void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 109{
 110        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 111
 112        mdp5_enable(mdp5_kms);
 113        mdp_update_vblank_mask(to_mdp_kms(kms),
 114                        mdp5_crtc_vblank(crtc), false);
 115        mdp5_disable(mdp5_kms);
 116}
 117