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
19#include "msm_drv.h"
20#include "mdp4_kms.h"
21
22void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask)
23{
24	mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);
25}
26
27static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
28{
29	DRM_ERROR("errors: %08x\n", irqstatus);
30}
31
32void mdp4_irq_preinstall(struct msm_kms *kms)
33{
34	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
35	mdp4_enable(mdp4_kms);
36	mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);
37	mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
38	mdp4_disable(mdp4_kms);
39}
40
41int mdp4_irq_postinstall(struct msm_kms *kms)
42{
43	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
44	struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
45	struct mdp_irq *error_handler = &mdp4_kms->error_handler;
46
47	error_handler->irq = mdp4_irq_error_handler;
48	error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
49			MDP4_IRQ_EXTERNAL_INTF_UDERRUN;
50
51	mdp_irq_register(mdp_kms, error_handler);
52
53	return 0;
54}
55
56void mdp4_irq_uninstall(struct msm_kms *kms)
57{
58	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
59	mdp4_enable(mdp4_kms);
60	mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
61	mdp4_disable(mdp4_kms);
62}
63
64irqreturn_t mdp4_irq(struct msm_kms *kms)
65{
66	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
67	struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
68	struct drm_device *dev = mdp4_kms->dev;
69	struct msm_drm_private *priv = dev->dev_private;
70	unsigned int id;
71	uint32_t status;
72
73	status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS);
74	mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
75
76	VERB("status=%08x", status);
77
78	mdp_dispatch_irqs(mdp_kms, status);
79
80	for (id = 0; id < priv->num_crtcs; id++)
81		if (status & mdp4_crtc_vblank(priv->crtcs[id]))
82			drm_handle_vblank(dev, id);
83
84	return IRQ_HANDLED;
85}
86
87int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
88{
89	mdp_update_vblank_mask(to_mdp_kms(kms),
90			mdp4_crtc_vblank(crtc), true);
91	return 0;
92}
93
94void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
95{
96	mdp_update_vblank_mask(to_mdp_kms(kms),
97			mdp4_crtc_vblank(crtc), false);
98}
99