Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 13 | #define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ |
| 14 | |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 15 | #include <linux/irqdomain.h> |
| 16 | #include <linux/irq.h> |
Ben Chan | 78647cd | 2016-06-26 22:02:47 -0400 | [diff] [blame] | 17 | #include <linux/kthread.h> |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 18 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 19 | #include "sde_irq.h" |
| 20 | #include "sde_core_irq.h" |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 21 | |
| 22 | irqreturn_t sde_irq(struct msm_kms *kms) |
| 23 | { |
Ben Chan | 78647cd | 2016-06-26 22:02:47 -0400 | [diff] [blame] | 24 | struct sde_kms *sde_kms = to_sde_kms(kms); |
| 25 | u32 interrupts; |
| 26 | |
| 27 | sde_kms->hw_intr->ops.get_interrupt_sources(sde_kms->hw_intr, |
| 28 | &interrupts); |
| 29 | |
| 30 | /* |
| 31 | * Taking care of MDP interrupt |
| 32 | */ |
| 33 | if (interrupts & IRQ_SOURCE_MDP) { |
| 34 | interrupts &= ~IRQ_SOURCE_MDP; |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 35 | sde_core_irq(sde_kms); |
Ben Chan | 78647cd | 2016-06-26 22:02:47 -0400 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | /* |
| 39 | * Routing all other interrupts to external drivers |
| 40 | */ |
| 41 | while (interrupts) { |
| 42 | irq_hw_number_t hwirq = fls(interrupts) - 1; |
| 43 | |
| 44 | generic_handle_irq(irq_find_mapping( |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 45 | sde_kms->irq_controller.domain, hwirq)); |
Ben Chan | 78647cd | 2016-06-26 22:02:47 -0400 | [diff] [blame] | 46 | interrupts &= ~(1 << hwirq); |
| 47 | } |
| 48 | |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 49 | return IRQ_HANDLED; |
| 50 | } |
| 51 | |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 52 | static void sde_hw_irq_mask(struct irq_data *irqd) |
| 53 | { |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 54 | struct sde_kms *sde_kms; |
| 55 | |
| 56 | if (!irqd || !irq_data_get_irq_chip_data(irqd)) { |
| 57 | SDE_ERROR("invalid parameters irqd %d\n", irqd != 0); |
| 58 | return; |
| 59 | } |
| 60 | sde_kms = irq_data_get_irq_chip_data(irqd); |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 61 | |
| 62 | /* memory barrier */ |
| 63 | smp_mb__before_atomic(); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 64 | clear_bit(irqd->hwirq, &sde_kms->irq_controller.enabled_mask); |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 65 | /* memory barrier */ |
| 66 | smp_mb__after_atomic(); |
| 67 | } |
| 68 | |
| 69 | static void sde_hw_irq_unmask(struct irq_data *irqd) |
| 70 | { |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 71 | struct sde_kms *sde_kms; |
| 72 | |
| 73 | if (!irqd || !irq_data_get_irq_chip_data(irqd)) { |
| 74 | SDE_ERROR("invalid parameters irqd %d\n", irqd != 0); |
| 75 | return; |
| 76 | } |
| 77 | sde_kms = irq_data_get_irq_chip_data(irqd); |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 78 | |
| 79 | /* memory barrier */ |
| 80 | smp_mb__before_atomic(); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 81 | set_bit(irqd->hwirq, &sde_kms->irq_controller.enabled_mask); |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 82 | /* memory barrier */ |
| 83 | smp_mb__after_atomic(); |
| 84 | } |
| 85 | |
| 86 | static struct irq_chip sde_hw_irq_chip = { |
| 87 | .name = "sde", |
| 88 | .irq_mask = sde_hw_irq_mask, |
| 89 | .irq_unmask = sde_hw_irq_unmask, |
| 90 | }; |
| 91 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 92 | static int sde_hw_irqdomain_map(struct irq_domain *domain, |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 93 | unsigned int irq, irq_hw_number_t hwirq) |
| 94 | { |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 95 | struct sde_kms *sde_kms; |
| 96 | int rc; |
Ben Chan | 78647cd | 2016-06-26 22:02:47 -0400 | [diff] [blame] | 97 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 98 | if (!domain || !domain->host_data) { |
| 99 | SDE_ERROR("invalid parameters domain %d\n", domain != 0); |
| 100 | return -EINVAL; |
| 101 | } |
| 102 | sde_kms = domain->host_data; |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 103 | |
| 104 | irq_set_chip_and_handler(irq, &sde_hw_irq_chip, handle_level_irq); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 105 | rc = irq_set_chip_data(irq, sde_kms); |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 106 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 107 | return rc; |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | static const struct irq_domain_ops sde_hw_irqdomain_ops = { |
| 111 | .map = sde_hw_irqdomain_map, |
| 112 | .xlate = irq_domain_xlate_onecell, |
| 113 | }; |
| 114 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 115 | void sde_irq_preinstall(struct msm_kms *kms) |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 116 | { |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 117 | struct sde_kms *sde_kms = to_sde_kms(kms); |
| 118 | struct device *dev; |
| 119 | struct irq_domain *domain; |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 120 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 121 | if (!sde_kms->dev || !sde_kms->dev->dev) { |
| 122 | pr_err("invalid device handles\n"); |
| 123 | return; |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 124 | } |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 125 | dev = sde_kms->dev->dev; |
| 126 | |
| 127 | domain = irq_domain_add_linear(dev->of_node, 32, |
| 128 | &sde_hw_irqdomain_ops, sde_kms); |
| 129 | if (!domain) { |
| 130 | pr_err("failed to add irq_domain\n"); |
| 131 | return; |
| 132 | } |
| 133 | |
| 134 | sde_kms->irq_controller.enabled_mask = 0; |
| 135 | sde_kms->irq_controller.domain = domain; |
| 136 | |
| 137 | sde_core_irq_preinstall(sde_kms); |
Narendra Muppalla | 1b0b335 | 2015-09-29 10:16:51 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 140 | int sde_irq_postinstall(struct msm_kms *kms) |
| 141 | { |
| 142 | struct sde_kms *sde_kms = to_sde_kms(kms); |
| 143 | int rc; |
| 144 | |
| 145 | if (!kms) { |
| 146 | SDE_ERROR("invalid parameters\n"); |
| 147 | return -EINVAL; |
| 148 | } |
| 149 | |
| 150 | rc = sde_core_irq_postinstall(sde_kms); |
| 151 | |
| 152 | return rc; |
| 153 | } |
| 154 | |
| 155 | void sde_irq_uninstall(struct msm_kms *kms) |
| 156 | { |
| 157 | struct sde_kms *sde_kms = to_sde_kms(kms); |
| 158 | |
| 159 | if (!kms) { |
| 160 | SDE_ERROR("invalid parameters\n"); |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | sde_core_irq_uninstall(sde_kms); |
| 165 | |
| 166 | if (sde_kms->irq_controller.domain) { |
| 167 | irq_domain_remove(sde_kms->irq_controller.domain); |
| 168 | sde_kms->irq_controller.domain = NULL; |
| 169 | } |
| 170 | } |