disp/mdp5/mdp5_irq.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) 2013 Red Hat
0004  * Author: Rob Clark <robdclark@gmail.com>
0005  */
0006
0007 #include <linux/irq.h>
0008
0009 #include <drm/drm_print.h>
0010 #include <drm/drm_vblank.h>
0011
0012 #include "msm_drv.h"
0013 #include "mdp5_kms.h"
0014
0015 void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
0016         uint32_t old_irqmask)
0017 {
0018     mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
0019            irqmask ^ (irqmask & old_irqmask));
0020     mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
0021 }
0022
0023 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
0024 {
0025     struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
0026     static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
0027     extern bool dumpstate;
0028
0029     DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
0030
0031     if (dumpstate && __ratelimit(&rs)) {
0032         struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
0033         drm_state_dump(mdp5_kms->dev, &p);
0034         if (mdp5_kms->smp)
0035             mdp5_smp_dump(mdp5_kms->smp, &p);
0036     }
0037 }
0038
0039 void mdp5_irq_preinstall(struct msm_kms *kms)
0040 {
0041     struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
0042     struct device *dev = &mdp5_kms->pdev->dev;
0043
0044     pm_runtime_get_sync(dev);
0045     mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
0046     mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
0047     pm_runtime_put_sync(dev);
0048 }
0049
0050 int mdp5_irq_postinstall(struct msm_kms *kms)
0051 {
0052     struct mdp_kms *mdp_kms = to_mdp_kms(kms);
0053     struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
0054     struct device *dev = &mdp5_kms->pdev->dev;
0055     struct mdp_irq *error_handler = &mdp5_kms->error_handler;
0056
0057     error_handler->irq = mdp5_irq_error_handler;
0058     error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
0059             MDP5_IRQ_INTF1_UNDER_RUN |
0060             MDP5_IRQ_INTF2_UNDER_RUN |
0061             MDP5_IRQ_INTF3_UNDER_RUN;
0062
0063     pm_runtime_get_sync(dev);
0064     mdp_irq_register(mdp_kms, error_handler);
0065     pm_runtime_put_sync(dev);
0066
0067     return 0;
0068 }
0069
0070 void mdp5_irq_uninstall(struct msm_kms *kms)
0071 {
0072     struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
0073     struct device *dev = &mdp5_kms->pdev->dev;
0074
0075     pm_runtime_get_sync(dev);
0076     mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
0077     pm_runtime_put_sync(dev);
0078 }
0079
0080 irqreturn_t mdp5_irq(struct msm_kms *kms)
0081 {
0082     struct mdp_kms *mdp_kms = to_mdp_kms(kms);
0083     struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
0084     struct drm_device *dev = mdp5_kms->dev;
0085     struct msm_drm_private *priv = dev->dev_private;
0086     unsigned int id;
0087     uint32_t status, enable;
0088
0089     enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
0090     status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
0091     mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
0092
0093     VERB("status=%08x", status);
0094
0095     mdp_dispatch_irqs(mdp_kms, status);
0096
0097     for (id = 0; id < priv->num_crtcs; id++)
0098         if (status & mdp5_crtc_vblank(priv->crtcs[id]))
0099             drm_handle_vblank(dev, id);
0100
0101     return IRQ_HANDLED;
0102 }
0103
0104 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
0105 {
0106     struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
0107     struct device *dev = &mdp5_kms->pdev->dev;
0108
0109     pm_runtime_get_sync(dev);
0110     mdp_update_vblank_mask(to_mdp_kms(kms),
0111             mdp5_crtc_vblank(crtc), true);
0112     pm_runtime_put_sync(dev);
0113
0114     return 0;
0115 }
0116
0117 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
0118 {
0119     struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
0120     struct device *dev = &mdp5_kms->pdev->dev;
0121
0122     pm_runtime_get_sync(dev);
0123     mdp_update_vblank_mask(to_mdp_kms(kms),
0124             mdp5_crtc_vblank(crtc), false);
0125     pm_runtime_put_sync(dev);
0126 }