2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
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.
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
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/>.
18 #include <linux/irqdomain.h>
19 #include <linux/irq.h>
24 void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask)
26 mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
29 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
31 DRM_ERROR("errors: %08x\n", irqstatus);
34 void mdp5_irq_preinstall(struct msm_kms *kms)
36 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
37 mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
40 int mdp5_irq_postinstall(struct msm_kms *kms)
42 struct mdp_kms *mdp_kms = to_mdp_kms(kms);
43 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
44 struct mdp_irq *error_handler = &mdp5_kms->error_handler;
46 error_handler->irq = mdp5_irq_error_handler;
47 error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
48 MDP5_IRQ_INTF1_UNDER_RUN |
49 MDP5_IRQ_INTF2_UNDER_RUN |
50 MDP5_IRQ_INTF3_UNDER_RUN;
52 mdp_irq_register(mdp_kms, error_handler);
57 void mdp5_irq_uninstall(struct msm_kms *kms)
59 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
60 mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
63 static void mdp5_irq_mdp(struct mdp_kms *mdp_kms)
65 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
66 struct drm_device *dev = mdp5_kms->dev;
67 struct msm_drm_private *priv = dev->dev_private;
71 status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS);
72 mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
74 VERB("status=%08x", status);
76 mdp_dispatch_irqs(mdp_kms, status);
78 for (id = 0; id < priv->num_crtcs; id++)
79 if (status & mdp5_crtc_vblank(priv->crtcs[id]))
80 drm_handle_vblank(dev, id);
83 irqreturn_t mdp5_irq(struct msm_kms *kms)
85 struct mdp_kms *mdp_kms = to_mdp_kms(kms);
86 struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
89 intr = mdp5_read(mdp5_kms, REG_MDP5_HW_INTR_STATUS);
91 VERB("intr=%08x", intr);
93 if (intr & MDP5_HW_INTR_STATUS_INTR_MDP) {
94 mdp5_irq_mdp(mdp_kms);
95 intr &= ~MDP5_HW_INTR_STATUS_INTR_MDP;
99 irq_hw_number_t hwirq = fls(intr) - 1;
100 generic_handle_irq(irq_find_mapping(
101 mdp5_kms->irqcontroller.domain, hwirq));
102 intr &= ~(1 << hwirq);
108 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
110 mdp_update_vblank_mask(to_mdp_kms(kms),
111 mdp5_crtc_vblank(crtc), true);
115 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
117 mdp_update_vblank_mask(to_mdp_kms(kms),
118 mdp5_crtc_vblank(crtc), false);
122 * interrupt-controller implementation, so sub-blocks (hdmi/eDP/dsi/etc)
123 * can register to get their irq's delivered
126 #define VALID_IRQS (MDP5_HW_INTR_STATUS_INTR_DSI0 | \
127 MDP5_HW_INTR_STATUS_INTR_DSI1 | \
128 MDP5_HW_INTR_STATUS_INTR_HDMI | \
129 MDP5_HW_INTR_STATUS_INTR_EDP)
131 static void mdp5_hw_mask_irq(struct irq_data *irqd)
133 struct mdp5_kms *mdp5_kms = irq_data_get_irq_chip_data(irqd);
134 smp_mb__before_atomic();
135 clear_bit(irqd->hwirq, &mdp5_kms->irqcontroller.enabled_mask);
136 smp_mb__after_atomic();
139 static void mdp5_hw_unmask_irq(struct irq_data *irqd)
141 struct mdp5_kms *mdp5_kms = irq_data_get_irq_chip_data(irqd);
142 smp_mb__before_atomic();
143 set_bit(irqd->hwirq, &mdp5_kms->irqcontroller.enabled_mask);
144 smp_mb__after_atomic();
147 static struct irq_chip mdp5_hw_irq_chip = {
149 .irq_mask = mdp5_hw_mask_irq,
150 .irq_unmask = mdp5_hw_unmask_irq,
153 static int mdp5_hw_irqdomain_map(struct irq_domain *d,
154 unsigned int irq, irq_hw_number_t hwirq)
156 struct mdp5_kms *mdp5_kms = d->host_data;
158 if (!(VALID_IRQS & (1 << hwirq)))
161 irq_set_chip_and_handler(irq, &mdp5_hw_irq_chip, handle_level_irq);
162 irq_set_chip_data(irq, mdp5_kms);
163 set_irq_flags(irq, IRQF_VALID);
168 static struct irq_domain_ops mdp5_hw_irqdomain_ops = {
169 .map = mdp5_hw_irqdomain_map,
170 .xlate = irq_domain_xlate_onecell,
174 int mdp5_irq_domain_init(struct mdp5_kms *mdp5_kms)
176 struct device *dev = mdp5_kms->dev->dev;
177 struct irq_domain *d;
179 d = irq_domain_add_linear(dev->of_node, 32,
180 &mdp5_hw_irqdomain_ops, mdp5_kms);
182 dev_err(dev, "mdp5 irq domain add failed\n");
186 mdp5_kms->irqcontroller.enabled_mask = 0;
187 mdp5_kms->irqcontroller.domain = d;
192 void mdp5_irq_domain_fini(struct mdp5_kms *mdp5_kms)
194 if (mdp5_kms->irqcontroller.domain) {
195 irq_domain_remove(mdp5_kms->irqcontroller.domain);
196 mdp5_kms->irqcontroller.domain = NULL;