LXR linux/drivers/gpu/drm/amd/display/dc/irq/irq

   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
  58void 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
  70void 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
  82static 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
  92void 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
 105bool 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 && 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
 130void 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
 142bool 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 && 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
 164enum 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}
 174