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 }
35 }
36
mdp5_irq_preinstall(struct msm_kms * kms)37 void mdp5_irq_preinstall(struct msm_kms *kms)
38 {
39 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
40 struct device *dev = &mdp5_kms->pdev->dev;
41
42 pm_runtime_get_sync(dev);
43 mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
44 mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
45 pm_runtime_put_sync(dev);
46 }
47
mdp5_irq_postinstall(struct msm_kms * kms)48 int mdp5_irq_postinstall(struct msm_kms *kms)
49 {
50 struct mdp_kms *mdp_kms = to_mdp_kms(kms);
51 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
52 struct device *dev = &mdp5_kms->pdev->dev;
53 struct mdp_irq *error_handler = &mdp5_kms->error_handler;
54
55 error_handler->irq = mdp5_irq_error_handler;
56 error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
57 MDP5_IRQ_INTF1_UNDER_RUN |
58 MDP5_IRQ_INTF2_UNDER_RUN |
59 MDP5_IRQ_INTF3_UNDER_RUN;
60
61 pm_runtime_get_sync(dev);
62 mdp_irq_register(mdp_kms, error_handler);
63 pm_runtime_put_sync(dev);
64
65 return 0;
66 }
67
mdp5_irq_uninstall(struct msm_kms * kms)68 void mdp5_irq_uninstall(struct msm_kms *kms)
69 {
70 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
71 struct device *dev = &mdp5_kms->pdev->dev;
72
73 pm_runtime_get_sync(dev);
74 mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
75 pm_runtime_put_sync(dev);
76 }
77
mdp5_irq(struct msm_kms * kms)78 irqreturn_t mdp5_irq(struct msm_kms *kms)
79 {
80 struct mdp_kms *mdp_kms = to_mdp_kms(kms);
81 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
82 struct drm_device *dev = mdp5_kms->dev;
83 struct drm_crtc *crtc;
84 uint32_t status, enable;
85
86 enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
87 status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
88 mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
89
90 VERB("status=%08x", status);
91
92 mdp_dispatch_irqs(mdp_kms, status);
93
94 drm_for_each_crtc(crtc, dev)
95 if (status & mdp5_crtc_vblank(crtc))
96 drm_crtc_handle_vblank(crtc);
97
98 return IRQ_HANDLED;
99 }
100
mdp5_enable_vblank(struct msm_kms * kms,struct drm_crtc * crtc)101 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
102 {
103 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
104 struct device *dev = &mdp5_kms->pdev->dev;
105
106 pm_runtime_get_sync(dev);
107 mdp_update_vblank_mask(to_mdp_kms(kms),
108 mdp5_crtc_vblank(crtc), true);
109 pm_runtime_put_sync(dev);
110
111 return 0;
112 }
113
mdp5_disable_vblank(struct msm_kms * kms,struct drm_crtc * crtc)114 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
115 {
116 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
117 struct device *dev = &mdp5_kms->pdev->dev;
118
119 pm_runtime_get_sync(dev);
120 mdp_update_vblank_mask(to_mdp_kms(kms),
121 mdp5_crtc_vblank(crtc), false);
122 pm_runtime_put_sync(dev);
123 }
124