drivers/gpu/drm/amd/display/dc/irq/irq_service.c

   1 /*
   2  * Copyright 2012-15 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: AMD
  23  *
  24  */
  25
  26 #include <linux/slab.h>
  27
  28 #include "dm_services.h"
  29
  30 #include "include/irq_service_interface.h"
  31 #include "include/logger_interface.h"
  32
  33 #include "dce110/irq_service_dce110.h"
  34
  35
  36 #include "dce80/irq_service_dce80.h"
  37
  38 #include "dce120/irq_service_dce120.h"
  39
  40
  41 #if defined(CONFIG_DRM_AMD_DC_DCN)
  42 #include "dcn10/irq_service_dcn10.h"
  43 #endif
  44
  45 #include "reg_helper.h"
  46 #include "irq_service.h"
  47
  48
  49
  50 #define CTX \
  51                 irq_service->ctx
  52 #define DC_LOGGER \
  53         irq_service->ctx->logger
  54
  55 void dal_irq_service_construct(
  56         struct irq_service *irq_service,
  57         struct irq_service_init_data *init_data)
  58 {
  59         if (!init_data || !init_data->ctx) {
  60                 BREAK_TO_DEBUGGER();
  61                 return;
  62         }
  63
  64         irq_service->ctx = init_data->ctx;
  65 }
  66
  67 void dal_irq_service_destroy(struct irq_service **irq_service)
  68 {
  69         if (!irq_service || !*irq_service) {
  70                 BREAK_TO_DEBUGGER();
  71                 return;
  72         }
  73
  74         kfree(*irq_service);
  75
  76         *irq_service = NULL;
  77 }
  78
  79 const struct irq_source_info *find_irq_source_info(
  80         struct irq_service *irq_service,
  81         enum dc_irq_source source)
  82 {
  83         if (source >= DAL_IRQ_SOURCES_NUMBER || source < DC_IRQ_SOURCE_INVALID)
  84                 return NULL;
  85
  86         return &irq_service->info[source];
  87 }
  88
  89 void dal_irq_service_set_generic(
  90         struct irq_service *irq_service,
  91         const struct irq_source_info *info,
  92         bool enable)
  93 {
  94         uint32_t addr = info->enable_reg;
  95         uint32_t value = dm_read_reg(irq_service->ctx, addr);
  96
  97         value = (value & ~info->enable_mask) |
  98                 (info->enable_value[enable ? 0 : 1] & info->enable_mask);
  99         dm_write_reg(irq_service->ctx, addr, value);
 100 }
 101
 102 bool dal_irq_service_set(
 103         struct irq_service *irq_service,
 104         enum dc_irq_source source,
 105         bool enable)
 106 {
 107         const struct irq_source_info *info =
 108                 find_irq_source_info(irq_service, source);
 109
 110         if (!info) {
 111                 DC_LOG_ERROR("%s: cannot find irq info table entry for %d\n",
 112                         __func__,
 113                         source);
 114                 return false;
 115         }
 116
 117         dal_irq_service_ack(irq_service, source);
 118
 119         if (info->funcs->set)
 120                 return info->funcs->set(irq_service, info, enable);
 121
 122         dal_irq_service_set_generic(irq_service, info, enable);
 123
 124         return true;
 125 }
 126
 127 void dal_irq_service_ack_generic(
 128         struct irq_service *irq_service,
 129         const struct irq_source_info *info)
 130 {
 131         uint32_t addr = info->ack_reg;
 132         uint32_t value = dm_read_reg(irq_service->ctx, addr);
 133
 134         value = (value & ~info->ack_mask) |
 135                 (info->ack_value & info->ack_mask);
 136         dm_write_reg(irq_service->ctx, addr, value);
 137 }
 138
 139 bool dal_irq_service_ack(
 140         struct irq_service *irq_service,
 141         enum dc_irq_source source)
 142 {
 143         const struct irq_source_info *info =
 144                 find_irq_source_info(irq_service, source);
 145
 146         if (!info) {
 147                 DC_LOG_ERROR("%s: cannot find irq info table entry for %d\n",
 148                         __func__,
 149                         source);
 150                 return false;
 151         }
 152
 153         if (info->funcs->ack)
 154                 return info->funcs->ack(irq_service, info);
 155
 156         dal_irq_service_ack_generic(irq_service, info);
 157
 158         return true;
 159 }
 160
 161 enum dc_irq_source dal_irq_service_to_irq_source(
 162                 struct irq_service *irq_service,
 163                 uint32_t src_id,
 164                 uint32_t ext_id)
 165 {
 166         return irq_service->funcs->to_dal_irq_source(
 167                 irq_service,
 168                 src_id,
 169                 ext_id);
 170 }