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 #if defined(CONFIG_DRM_AMD_DC_SI)
  36 #include "dce60/irq_service_dce60.h"
  37 #endif
  38
  39 #include "dce80/irq_service_dce80.h"
  40
  41 #include "dce120/irq_service_dce120.h"
  42
  43
  44 #if defined(CONFIG_DRM_AMD_DC_DCN)
  45 #include "dcn10/irq_service_dcn10.h"
  46 #endif
  47
  48 #include "reg_helper.h"
  49 #include "irq_service.h"
  50
  51
  52
  53 #define CTX \
  54                 irq_service->ctx
  55 #define DC_LOGGER \
  56         irq_service->ctx->logger
  57
  58 void dal_irq_service_construct(
  59         struct irq_service *irq_service,
  60         struct irq_service_init_data *init_data)
  61 {
  62         if (!init_data || !init_data->ctx) {
  63                 BREAK_TO_DEBUGGER();
  64                 return;
  65         }
  66
  67         irq_service->ctx = init_data->ctx;
  68 }
  69
  70 void dal_irq_service_destroy(struct irq_service **irq_service)
  71 {
  72         if (!irq_service || !*irq_service) {
  73                 BREAK_TO_DEBUGGER();
  74                 return;
  75         }
  76
  77         kfree(*irq_service);
  78
  79         *irq_service = NULL;
  80 }
  81
  82 static const struct irq_source_info *find_irq_source_info(
  83         struct irq_service *irq_service,
  84         enum dc_irq_source source)
  85 {
  86         if (source >= DAL_IRQ_SOURCES_NUMBER || source < DC_IRQ_SOURCE_INVALID)
  87                 return NULL;
  88
  89         return &irq_service->info[source];
  90 }
  91
  92 void dal_irq_service_set_generic(
  93         struct irq_service *irq_service,
  94         const struct irq_source_info *info,
  95         bool enable)
  96 {
  97         uint32_t addr = info->enable_reg;
  98         uint32_t value = dm_read_reg(irq_service->ctx, addr);
  99
 100         value = (value & ~info->enable_mask) |
 101                 (info->enable_value[enable ? 0 : 1] & info->enable_mask);
 102         dm_write_reg(irq_service->ctx, addr, value);
 103 }
 104
 105 bool dal_irq_service_set(
 106         struct irq_service *irq_service,
 107         enum dc_irq_source source,
 108         bool enable)
 109 {
 110         const struct irq_source_info *info =
 111                 find_irq_source_info(irq_service, source);
 112
 113         if (!info) {
 114                 DC_LOG_ERROR("%s: cannot find irq info table entry for %d\n",
 115                         __func__,
 116                         source);
 117                 return false;
 118         }
 119
 120         dal_irq_service_ack(irq_service, source);
 121
 122         if (info->funcs->set)
 123                 return info->funcs->set(irq_service, info, enable);
 124
 125         dal_irq_service_set_generic(irq_service, info, enable);
 126
 127         return true;
 128 }
 129
 130 void dal_irq_service_ack_generic(
 131         struct irq_service *irq_service,
 132         const struct irq_source_info *info)
 133 {
 134         uint32_t addr = info->ack_reg;
 135         uint32_t value = dm_read_reg(irq_service->ctx, addr);
 136
 137         value = (value & ~info->ack_mask) |
 138                 (info->ack_value & info->ack_mask);
 139         dm_write_reg(irq_service->ctx, addr, value);
 140 }
 141
 142 bool dal_irq_service_ack(
 143         struct irq_service *irq_service,
 144         enum dc_irq_source source)
 145 {
 146         const struct irq_source_info *info =
 147                 find_irq_source_info(irq_service, source);
 148
 149         if (!info) {
 150                 DC_LOG_ERROR("%s: cannot find irq info table entry for %d\n",
 151                         __func__,
 152                         source);
 153                 return false;
 154         }
 155
 156         if (info->funcs->ack)
 157                 return info->funcs->ack(irq_service, info);
 158
 159         dal_irq_service_ack_generic(irq_service, info);
 160
 161         return true;
 162 }
 163
 164 enum dc_irq_source dal_irq_service_to_irq_source(
 165                 struct irq_service *irq_service,
 166                 uint32_t src_id,
 167                 uint32_t ext_id)
 168 {
 169         return irq_service->funcs->to_dal_irq_source(
 170                 irq_service,
 171                 src_id,
 172                 ext_id);
 173 }