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
mdp5_set_irqmask(struct mdp_kms * mdp_kms,uint32_t irqmask,uint32_t old_irqmask)23 void 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
mdp5_irq_error_handler(struct mdp_irq * irq,uint32_t irqstatus)31 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
32 {
33 DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
34 }
35
mdp5_irq_preinstall(struct msm_kms * kms)36 void 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
mdp5_irq_postinstall(struct msm_kms * kms)45 int 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
mdp5_irq_uninstall(struct msm_kms * kms)64 void 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
mdp5_irq(struct msm_kms * kms)72 irqreturn_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
mdp5_enable_vblank(struct msm_kms * kms,struct drm_crtc * crtc)96 int 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
mdp5_disable_vblank(struct msm_kms * kms,struct drm_crtc * crtc)108 void 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