1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7 #include <linux/irq.h>
8
9 #include <drm/drm_print.h>
10 #include <drm/drm_vblank.h>
11
12 #include "msm_drv.h"
13 #include "mdp5_kms.h"
14
mdp5_set_irqmask(struct mdp_kms * mdp_kms,uint32_t irqmask,uint32_t old_irqmask)15 void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
16 uint32_t old_irqmask)
17 {
18 mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
19 irqmask ^ (irqmask & old_irqmask));
20 mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
21 }
22
mdp5_irq_error_handler(struct mdp_irq * irq,uint32_t irqstatus)23 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
24 {
25 struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
26 static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
27 extern bool dumpstate;
28
29 DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
30
31 if (dumpstate && __ratelimit(&rs)) {
32 struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
33 drm_state_dump(mdp5_kms->dev, &p);
34 if (mdp5_kms->smp)
35 mdp5_smp_dump(mdp5_kms->smp, &p);
36 }
37 }
38
mdp5_irq_preinstall(struct msm_kms * kms)39 void mdp5_irq_preinstall(struct msm_kms *kms)
40 {
41 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
42 struct device *dev = &mdp5_kms->pdev->dev;
43
44 pm_runtime_get_sync(dev);
45 mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
46 mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
47 pm_runtime_put_sync(dev);
48 }
49
mdp5_irq_postinstall(struct msm_kms * kms)50 int mdp5_irq_postinstall(struct msm_kms *kms)
51 {
52 struct mdp_kms *mdp_kms = to_mdp_kms(kms);
53 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
54 struct device *dev = &mdp5_kms->pdev->dev;
55 struct mdp_irq *error_handler = &mdp5_kms->error_handler;
56
57 error_handler->irq = mdp5_irq_error_handler;
58 error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
59 MDP5_IRQ_INTF1_UNDER_RUN |
60 MDP5_IRQ_INTF2_UNDER_RUN |
61 MDP5_IRQ_INTF3_UNDER_RUN;
62
63 pm_runtime_get_sync(dev);
64 mdp_irq_register(mdp_kms, error_handler);
65 pm_runtime_put_sync(dev);
66
67 return 0;
68 }
69
mdp5_irq_uninstall(struct msm_kms * kms)70 void mdp5_irq_uninstall(struct msm_kms *kms)
71 {
72 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
73 struct device *dev = &mdp5_kms->pdev->dev;
74
75 pm_runtime_get_sync(dev);
76 mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
77 pm_runtime_put_sync(dev);
78 }
79
mdp5_irq(struct msm_kms * kms)80 irqreturn_t mdp5_irq(struct msm_kms *kms)
81 {
82 struct mdp_kms *mdp_kms = to_mdp_kms(kms);
83 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
84 struct drm_device *dev = mdp5_kms->dev;
85 struct drm_crtc *crtc;
86 uint32_t status, enable;
87
88 enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
89 status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
90 mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
91
92 VERB("status=%08x", status);
93
94 mdp_dispatch_irqs(mdp_kms, status);
95
96 drm_for_each_crtc(crtc, dev)
97 if (status & mdp5_crtc_vblank(crtc))
98 drm_crtc_handle_vblank(crtc);
99
100 return IRQ_HANDLED;
101 }
102
mdp5_enable_vblank(struct msm_kms * kms,struct drm_crtc * crtc)103 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
104 {
105 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
106 struct device *dev = &mdp5_kms->pdev->dev;
107
108 pm_runtime_get_sync(dev);
109 mdp_update_vblank_mask(to_mdp_kms(kms),
110 mdp5_crtc_vblank(crtc), true);
111 pm_runtime_put_sync(dev);
112
113 return 0;
114 }
115
mdp5_disable_vblank(struct msm_kms * kms,struct drm_crtc * crtc)116 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
117 {
118 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
119 struct device *dev = &mdp5_kms->pdev->dev;
120
121 pm_runtime_get_sync(dev);
122 mdp_update_vblank_mask(to_mdp_kms(kms),
123 mdp5_crtc_vblank(crtc), false);
124 pm_runtime_put_sync(dev);
125 }
126