Dhaval Patel | 81e8788 | 2016-10-19 21:41:56 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved. |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 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 | |
| 13 | #define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ |
| 14 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 15 | #include <linux/debugfs.h> |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 16 | #include <linux/irqdomain.h> |
| 17 | #include <linux/irq.h> |
| 18 | #include <linux/kthread.h> |
| 19 | |
| 20 | #include "sde_core_irq.h" |
| 21 | #include "sde_power_handle.h" |
| 22 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 23 | /** |
| 24 | * sde_core_irq_callback_handler - dispatch core interrupts |
| 25 | * @arg: private data of callback handler |
| 26 | * @irq_idx: interrupt index |
| 27 | */ |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 28 | static void sde_core_irq_callback_handler(void *arg, int irq_idx) |
| 29 | { |
| 30 | struct sde_kms *sde_kms = arg; |
| 31 | struct sde_irq *irq_obj = &sde_kms->irq_obj; |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 32 | struct sde_irq_callback *cb; |
| 33 | unsigned long irq_flags; |
| 34 | |
| 35 | SDE_DEBUG("irq_idx=%d\n", irq_idx); |
| 36 | |
| 37 | if (list_empty(&irq_obj->irq_cb_tbl[irq_idx])) |
| 38 | SDE_ERROR("irq_idx=%d has no registered callback\n", irq_idx); |
| 39 | |
| 40 | atomic_inc(&irq_obj->irq_counts[irq_idx]); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 41 | |
| 42 | /* |
| 43 | * Perform registered function callback |
| 44 | */ |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 45 | spin_lock_irqsave(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 46 | list_for_each_entry(cb, &irq_obj->irq_cb_tbl[irq_idx], list) |
| 47 | if (cb->func) |
| 48 | cb->func(cb->arg, irq_idx); |
| 49 | spin_unlock_irqrestore(&sde_kms->irq_obj.cb_lock, irq_flags); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 50 | |
| 51 | /* |
| 52 | * Clear pending interrupt status in HW. |
| 53 | * NOTE: sde_core_irq_callback_handler is protected by top-level |
| 54 | * spinlock, so it is safe to clear any interrupt status here. |
| 55 | */ |
| 56 | sde_kms->hw_intr->ops.clear_interrupt_status( |
| 57 | sde_kms->hw_intr, |
| 58 | irq_idx); |
| 59 | } |
| 60 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 61 | int sde_core_irq_idx_lookup(struct sde_kms *sde_kms, |
| 62 | enum sde_intr_type intr_type, u32 instance_idx) |
| 63 | { |
| 64 | if (!sde_kms || !sde_kms->hw_intr || |
| 65 | !sde_kms->hw_intr->ops.irq_idx_lookup) |
| 66 | return -EINVAL; |
| 67 | |
| 68 | return sde_kms->hw_intr->ops.irq_idx_lookup(intr_type, |
| 69 | instance_idx); |
| 70 | } |
| 71 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 72 | /** |
| 73 | * _sde_core_irq_enable - enable core interrupt given by the index |
| 74 | * @sde_kms: Pointer to sde kms context |
| 75 | * @irq_idx: interrupt index |
| 76 | */ |
| 77 | static int _sde_core_irq_enable(struct sde_kms *sde_kms, int irq_idx) |
| 78 | { |
| 79 | unsigned long irq_flags; |
| 80 | int ret = 0; |
| 81 | |
| 82 | if (!sde_kms || !sde_kms->hw_intr || |
| 83 | !sde_kms->irq_obj.enable_counts || |
| 84 | !sde_kms->irq_obj.irq_counts) { |
| 85 | SDE_ERROR("invalid params\n"); |
| 86 | return -EINVAL; |
| 87 | } |
| 88 | |
| 89 | if (irq_idx < 0 || irq_idx >= sde_kms->hw_intr->irq_idx_tbl_size) { |
| 90 | SDE_ERROR("invalid IRQ index: [%d]\n", irq_idx); |
| 91 | return -EINVAL; |
| 92 | } |
| 93 | |
| 94 | SDE_DEBUG("irq_idx=%d enable_count=%d\n", irq_idx, |
| 95 | atomic_read(&sde_kms->irq_obj.enable_counts[irq_idx])); |
| 96 | |
| 97 | spin_lock_irqsave(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 98 | MSM_EVTMSG(sde_kms->dev, NULL, irq_idx, |
| 99 | atomic_read(&sde_kms->irq_obj.enable_counts[irq_idx])); |
| 100 | if (atomic_inc_return(&sde_kms->irq_obj.enable_counts[irq_idx]) == 1) { |
| 101 | ret = sde_kms->hw_intr->ops.enable_irq( |
| 102 | sde_kms->hw_intr, |
| 103 | irq_idx); |
| 104 | if (ret) |
| 105 | SDE_ERROR("Fail to enable IRQ for irq_idx:%d\n", |
| 106 | irq_idx); |
| 107 | |
| 108 | SDE_DEBUG("irq_idx=%d ret=%d\n", irq_idx, ret); |
| 109 | |
| 110 | /* empty callback list but interrupt is enabled */ |
| 111 | if (list_empty(&sde_kms->irq_obj.irq_cb_tbl[irq_idx])) |
| 112 | SDE_ERROR("irq_idx=%d enabled with no callback\n", |
| 113 | irq_idx); |
| 114 | } |
| 115 | spin_unlock_irqrestore(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 116 | |
| 117 | return ret; |
| 118 | } |
| 119 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 120 | int sde_core_irq_enable(struct sde_kms *sde_kms, int *irq_idxs, u32 irq_count) |
| 121 | { |
| 122 | int i; |
| 123 | int ret = 0; |
| 124 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 125 | if (!sde_kms || !irq_idxs || !irq_count) { |
| 126 | SDE_ERROR("invalid params\n"); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 127 | return -EINVAL; |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 128 | } |
| 129 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 130 | for (i = 0; (i < irq_count) && !ret; i++) |
| 131 | ret = _sde_core_irq_enable(sde_kms, irq_idxs[i]); |
| 132 | |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * _sde_core_irq_disable - disable core interrupt given by the index |
| 138 | * @sde_kms: Pointer to sde kms context |
| 139 | * @irq_idx: interrupt index |
| 140 | */ |
| 141 | static int _sde_core_irq_disable(struct sde_kms *sde_kms, int irq_idx) |
| 142 | { |
| 143 | unsigned long irq_flags; |
| 144 | int ret = 0; |
| 145 | |
| 146 | if (!sde_kms || !sde_kms->hw_intr || !sde_kms->irq_obj.enable_counts) { |
| 147 | SDE_ERROR("invalid params\n"); |
| 148 | return -EINVAL; |
| 149 | } |
| 150 | |
| 151 | if (irq_idx < 0 || irq_idx >= sde_kms->hw_intr->irq_idx_tbl_size) { |
| 152 | SDE_ERROR("invalid IRQ index: [%d]\n", irq_idx); |
| 153 | return -EINVAL; |
| 154 | } |
| 155 | |
| 156 | SDE_DEBUG("irq_idx=%d enable_count=%d\n", irq_idx, |
| 157 | atomic_read(&sde_kms->irq_obj.enable_counts[irq_idx])); |
| 158 | |
| 159 | spin_lock_irqsave(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 160 | MSM_EVTMSG(sde_kms->dev, NULL, irq_idx, |
| 161 | atomic_read(&sde_kms->irq_obj.enable_counts[irq_idx])); |
| 162 | if (atomic_dec_return(&sde_kms->irq_obj.enable_counts[irq_idx]) == 0) { |
| 163 | ret = sde_kms->hw_intr->ops.disable_irq( |
| 164 | sde_kms->hw_intr, |
| 165 | irq_idx); |
| 166 | if (ret) |
| 167 | SDE_ERROR("Fail to disable IRQ for irq_idx:%d\n", |
| 168 | irq_idx); |
| 169 | SDE_DEBUG("irq_idx=%d ret=%d\n", irq_idx, ret); |
| 170 | } |
| 171 | spin_unlock_irqrestore(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 172 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 173 | return ret; |
| 174 | } |
| 175 | |
| 176 | int sde_core_irq_disable(struct sde_kms *sde_kms, int *irq_idxs, u32 irq_count) |
| 177 | { |
| 178 | int i; |
| 179 | int ret = 0; |
| 180 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 181 | if (!sde_kms || !irq_idxs || !irq_count) { |
| 182 | SDE_ERROR("invalid params\n"); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 183 | return -EINVAL; |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 184 | } |
| 185 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 186 | for (i = 0; (i < irq_count) && !ret; i++) |
| 187 | ret = _sde_core_irq_disable(sde_kms, irq_idxs[i]); |
| 188 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 189 | return ret; |
| 190 | } |
| 191 | |
| 192 | u32 sde_core_irq_read(struct sde_kms *sde_kms, int irq_idx, bool clear) |
| 193 | { |
| 194 | if (!sde_kms || !sde_kms->hw_intr || |
| 195 | !sde_kms->hw_intr->ops.get_interrupt_status) |
| 196 | return 0; |
| 197 | |
| 198 | return sde_kms->hw_intr->ops.get_interrupt_status(sde_kms->hw_intr, |
| 199 | irq_idx, clear); |
| 200 | } |
| 201 | |
| 202 | int sde_core_irq_register_callback(struct sde_kms *sde_kms, int irq_idx, |
| 203 | struct sde_irq_callback *register_irq_cb) |
| 204 | { |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 205 | unsigned long irq_flags; |
| 206 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 207 | if (!sde_kms || !register_irq_cb || !register_irq_cb->func || |
| 208 | !sde_kms->irq_obj.irq_cb_tbl) { |
| 209 | SDE_ERROR("invalid params\n"); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 210 | return -EINVAL; |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 211 | } |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 212 | |
| 213 | if (irq_idx < 0 || irq_idx >= sde_kms->hw_intr->irq_idx_tbl_size) { |
| 214 | SDE_ERROR("invalid IRQ index: [%d]\n", irq_idx); |
| 215 | return -EINVAL; |
| 216 | } |
| 217 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 218 | SDE_DEBUG("[%pS] irq_idx=%d\n", __builtin_return_address(0), irq_idx); |
| 219 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 220 | spin_lock_irqsave(&sde_kms->irq_obj.cb_lock, irq_flags); |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 221 | MSM_EVTMSG(sde_kms->dev, NULL, irq_idx, register_irq_cb); |
| 222 | list_del_init(®ister_irq_cb->list); |
| 223 | list_add_tail(®ister_irq_cb->list, |
| 224 | &sde_kms->irq_obj.irq_cb_tbl[irq_idx]); |
| 225 | spin_unlock_irqrestore(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | int sde_core_irq_unregister_callback(struct sde_kms *sde_kms, int irq_idx, |
| 231 | struct sde_irq_callback *register_irq_cb) |
| 232 | { |
| 233 | unsigned long irq_flags; |
| 234 | |
| 235 | if (!sde_kms || !register_irq_cb || !register_irq_cb->func || |
| 236 | !sde_kms->irq_obj.irq_cb_tbl) { |
| 237 | SDE_ERROR("invalid params\n"); |
| 238 | return -EINVAL; |
| 239 | } |
| 240 | |
| 241 | if (irq_idx < 0 || irq_idx >= sde_kms->hw_intr->irq_idx_tbl_size) { |
| 242 | SDE_ERROR("invalid IRQ index: [%d]\n", irq_idx); |
| 243 | return -EINVAL; |
| 244 | } |
| 245 | |
| 246 | SDE_DEBUG("[%pS] irq_idx=%d\n", __builtin_return_address(0), irq_idx); |
| 247 | |
| 248 | spin_lock_irqsave(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 249 | MSM_EVTMSG(sde_kms->dev, NULL, irq_idx, register_irq_cb); |
| 250 | list_del_init(®ister_irq_cb->list); |
| 251 | /* empty callback list but interrupt is still enabled */ |
| 252 | if (list_empty(&sde_kms->irq_obj.irq_cb_tbl[irq_idx]) && |
| 253 | atomic_read(&sde_kms->irq_obj.enable_counts[irq_idx])) |
| 254 | SDE_ERROR("irq_idx=%d enabled with no callback\n", irq_idx); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 255 | spin_unlock_irqrestore(&sde_kms->irq_obj.cb_lock, irq_flags); |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | static void sde_clear_all_irqs(struct sde_kms *sde_kms) |
| 261 | { |
| 262 | if (!sde_kms || !sde_kms->hw_intr || |
| 263 | !sde_kms->hw_intr->ops.clear_all_irqs) |
| 264 | return; |
| 265 | |
| 266 | sde_kms->hw_intr->ops.clear_all_irqs(sde_kms->hw_intr); |
| 267 | } |
| 268 | |
| 269 | static void sde_disable_all_irqs(struct sde_kms *sde_kms) |
| 270 | { |
| 271 | if (!sde_kms || !sde_kms->hw_intr || |
| 272 | !sde_kms->hw_intr->ops.disable_all_irqs) |
| 273 | return; |
| 274 | |
| 275 | sde_kms->hw_intr->ops.disable_all_irqs(sde_kms->hw_intr); |
| 276 | } |
| 277 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 278 | #ifdef CONFIG_DEBUG_FS |
| 279 | #define DEFINE_SDE_DEBUGFS_SEQ_FOPS(__prefix) \ |
| 280 | static int __prefix ## _open(struct inode *inode, struct file *file) \ |
| 281 | { \ |
| 282 | return single_open(file, __prefix ## _show, inode->i_private); \ |
| 283 | } \ |
| 284 | static const struct file_operations __prefix ## _fops = { \ |
| 285 | .owner = THIS_MODULE, \ |
| 286 | .open = __prefix ## _open, \ |
| 287 | .release = single_release, \ |
| 288 | .read = seq_read, \ |
| 289 | .llseek = seq_lseek, \ |
| 290 | } |
| 291 | |
| 292 | static int sde_debugfs_core_irq_show(struct seq_file *s, void *v) |
| 293 | { |
| 294 | struct sde_irq *irq_obj = s->private; |
| 295 | struct sde_irq_callback *cb; |
| 296 | unsigned long irq_flags; |
| 297 | int i, irq_count, enable_count, cb_count; |
| 298 | |
| 299 | if (!irq_obj || !irq_obj->enable_counts || !irq_obj->irq_cb_tbl) { |
| 300 | SDE_ERROR("invalid parameters\n"); |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | for (i = 0; i < irq_obj->total_irqs; i++) { |
| 305 | spin_lock_irqsave(&irq_obj->cb_lock, irq_flags); |
| 306 | cb_count = 0; |
| 307 | irq_count = atomic_read(&irq_obj->irq_counts[i]); |
| 308 | enable_count = atomic_read(&irq_obj->enable_counts[i]); |
| 309 | list_for_each_entry(cb, &irq_obj->irq_cb_tbl[i], list) |
| 310 | cb_count++; |
| 311 | spin_unlock_irqrestore(&irq_obj->cb_lock, irq_flags); |
| 312 | |
| 313 | if (irq_count || enable_count || cb_count) |
| 314 | seq_printf(s, "idx:%d irq:%d enable:%d cb:%d\n", |
| 315 | i, irq_count, enable_count, cb_count); |
| 316 | } |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | DEFINE_SDE_DEBUGFS_SEQ_FOPS(sde_debugfs_core_irq); |
| 322 | |
| 323 | static int sde_debugfs_core_irq_init(struct sde_kms *sde_kms, |
| 324 | struct dentry *parent) |
| 325 | { |
| 326 | sde_kms->irq_obj.debugfs_file = debugfs_create_file("core_irq", 0644, |
| 327 | parent, &sde_kms->irq_obj, |
| 328 | &sde_debugfs_core_irq_fops); |
| 329 | |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static void sde_debugfs_core_irq_destroy(struct sde_kms *sde_kms) |
| 334 | { |
| 335 | debugfs_remove(sde_kms->irq_obj.debugfs_file); |
| 336 | sde_kms->irq_obj.debugfs_file = NULL; |
| 337 | } |
| 338 | |
| 339 | #else |
| 340 | static int sde_debugfs_core_irq_init(struct sde_kms *sde_kms, |
| 341 | struct dentry *parent) |
| 342 | { |
| 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | static void sde_debugfs_core_irq_destroy(struct sde_kms *sde_kms) |
| 347 | { |
| 348 | } |
| 349 | #endif |
| 350 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 351 | void sde_core_irq_preinstall(struct sde_kms *sde_kms) |
| 352 | { |
| 353 | struct msm_drm_private *priv; |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 354 | int i; |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 355 | |
| 356 | if (!sde_kms) { |
| 357 | SDE_ERROR("invalid sde_kms\n"); |
| 358 | return; |
| 359 | } else if (!sde_kms->dev) { |
| 360 | SDE_ERROR("invalid drm device\n"); |
| 361 | return; |
| 362 | } else if (!sde_kms->dev->dev_private) { |
| 363 | SDE_ERROR("invalid device private\n"); |
| 364 | return; |
| 365 | } |
| 366 | priv = sde_kms->dev->dev_private; |
| 367 | |
| 368 | sde_power_resource_enable(&priv->phandle, sde_kms->core_client, true); |
| 369 | sde_clear_all_irqs(sde_kms); |
| 370 | sde_disable_all_irqs(sde_kms); |
| 371 | sde_power_resource_enable(&priv->phandle, sde_kms->core_client, false); |
| 372 | |
| 373 | spin_lock_init(&sde_kms->irq_obj.cb_lock); |
| 374 | |
| 375 | /* Create irq callbacks for all possible irq_idx */ |
| 376 | sde_kms->irq_obj.total_irqs = sde_kms->hw_intr->irq_idx_tbl_size; |
| 377 | sde_kms->irq_obj.irq_cb_tbl = kcalloc(sde_kms->irq_obj.total_irqs, |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 378 | sizeof(struct list_head), GFP_KERNEL); |
| 379 | sde_kms->irq_obj.enable_counts = kcalloc(sde_kms->irq_obj.total_irqs, |
| 380 | sizeof(atomic_t), GFP_KERNEL); |
| 381 | sde_kms->irq_obj.irq_counts = kcalloc(sde_kms->irq_obj.total_irqs, |
| 382 | sizeof(atomic_t), GFP_KERNEL); |
| 383 | for (i = 0; i < sde_kms->irq_obj.total_irqs; i++) { |
| 384 | INIT_LIST_HEAD(&sde_kms->irq_obj.irq_cb_tbl[i]); |
| 385 | atomic_set(&sde_kms->irq_obj.enable_counts[i], 0); |
| 386 | atomic_set(&sde_kms->irq_obj.irq_counts[i], 0); |
| 387 | } |
| 388 | |
| 389 | sde_debugfs_core_irq_init(sde_kms, sde_kms->debugfs_root); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | int sde_core_irq_postinstall(struct sde_kms *sde_kms) |
| 393 | { |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | void sde_core_irq_uninstall(struct sde_kms *sde_kms) |
| 398 | { |
| 399 | struct msm_drm_private *priv; |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 400 | int i; |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 401 | |
| 402 | if (!sde_kms) { |
| 403 | SDE_ERROR("invalid sde_kms\n"); |
| 404 | return; |
| 405 | } else if (!sde_kms->dev) { |
| 406 | SDE_ERROR("invalid drm device\n"); |
| 407 | return; |
| 408 | } else if (!sde_kms->dev->dev_private) { |
| 409 | SDE_ERROR("invalid device private\n"); |
| 410 | return; |
| 411 | } |
| 412 | priv = sde_kms->dev->dev_private; |
| 413 | |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 414 | sde_debugfs_core_irq_destroy(sde_kms); |
| 415 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 416 | sde_power_resource_enable(&priv->phandle, sde_kms->core_client, true); |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 417 | for (i = 0; i < sde_kms->irq_obj.total_irqs; i++) |
| 418 | if (atomic_read(&sde_kms->irq_obj.enable_counts[i]) || |
| 419 | !list_empty(&sde_kms->irq_obj.irq_cb_tbl[i])) |
| 420 | SDE_ERROR("irq_idx=%d still enabled/registered\n", i); |
| 421 | |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 422 | sde_clear_all_irqs(sde_kms); |
| 423 | sde_disable_all_irqs(sde_kms); |
| 424 | sde_power_resource_enable(&priv->phandle, sde_kms->core_client, false); |
| 425 | |
| 426 | kfree(sde_kms->irq_obj.irq_cb_tbl); |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 427 | kfree(sde_kms->irq_obj.enable_counts); |
| 428 | kfree(sde_kms->irq_obj.irq_counts); |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 429 | sde_kms->irq_obj.irq_cb_tbl = NULL; |
Alan Kwong | a172ef5 | 2016-09-27 00:29:10 -0400 | [diff] [blame] | 430 | sde_kms->irq_obj.enable_counts = NULL; |
| 431 | sde_kms->irq_obj.irq_counts = NULL; |
| 432 | sde_kms->irq_obj.total_irqs = 0; |
Alan Kwong | f5dd86c | 2016-08-09 18:08:17 -0400 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | irqreturn_t sde_core_irq(struct sde_kms *sde_kms) |
| 436 | { |
| 437 | /* |
| 438 | * Read interrupt status from all sources. Interrupt status are |
| 439 | * stored within hw_intr. |
| 440 | * Function will also clear the interrupt status after reading. |
| 441 | * Individual interrupt status bit will only get stored if it |
| 442 | * is enabled. |
| 443 | */ |
| 444 | sde_kms->hw_intr->ops.get_interrupt_statuses(sde_kms->hw_intr); |
| 445 | |
| 446 | /* |
| 447 | * Dispatch to HW driver to handle interrupt lookup that is being |
| 448 | * fired. When matching interrupt is located, HW driver will call to |
| 449 | * sde_core_irq_callback_handler with the irq_idx from the lookup table. |
| 450 | * sde_core_irq_callback_handler will perform the registered function |
| 451 | * callback, and do the interrupt status clearing once the registered |
| 452 | * callback is finished. |
| 453 | */ |
| 454 | sde_kms->hw_intr->ops.dispatch_irqs( |
| 455 | sde_kms->hw_intr, |
| 456 | sde_core_irq_callback_handler, |
| 457 | sde_kms); |
| 458 | |
| 459 | return IRQ_HANDLED; |
| 460 | } |