drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c

   1 /*
   2  * Copyright 2021 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 "reg_helper.h"
  27 #include "core_types.h"
  28 #include "dc_dmub_srv.h"
  29 #include "dcn31_panel_cntl.h"
  30 #include "atom.h"
  31
  32 #define TO_DCN31_PANEL_CNTL(panel_cntl)\
  33         container_of(panel_cntl, struct dcn31_panel_cntl, base)
  34
  35 #define CTX \
  36         dcn31_panel_cntl->base.ctx
  37
  38 #define DC_LOGGER \
  39         dcn31_panel_cntl->base.ctx->logger
  40
  41 static bool dcn31_query_backlight_info(struct panel_cntl *panel_cntl, union dmub_rb_cmd *cmd)
  42 {
  43         struct dcn31_panel_cntl *dcn31_panel_cntl = TO_DCN31_PANEL_CNTL(panel_cntl);
  44         struct dc_dmub_srv *dc_dmub_srv = panel_cntl->ctx->dmub_srv;
  45
  46         if (!dc_dmub_srv)
  47                 return false;
  48
  49         memset(cmd, 0, sizeof(*cmd));
  50         cmd->panel_cntl.header.type = DMUB_CMD__PANEL_CNTL;
  51         cmd->panel_cntl.header.sub_type = DMUB_CMD__PANEL_CNTL_QUERY_BACKLIGHT_INFO;
  52         cmd->panel_cntl.header.payload_bytes = sizeof(cmd->panel_cntl.data);
  53         cmd->panel_cntl.data.inst = dcn31_panel_cntl->base.inst;
  54
  55         return dc_dmub_srv_cmd_with_reply_data(dc_dmub_srv, cmd);
  56 }
  57
  58 static uint32_t dcn31_get_16_bit_backlight_from_pwm(struct panel_cntl *panel_cntl)
  59 {
  60         union dmub_rb_cmd cmd;
  61
  62         if (!dcn31_query_backlight_info(panel_cntl, &cmd))
  63                 return 0;
  64
  65         return cmd.panel_cntl.data.current_backlight;
  66 }
  67
  68 uint32_t dcn31_panel_cntl_hw_init(struct panel_cntl *panel_cntl)
  69 {
  70         struct dcn31_panel_cntl *dcn31_panel_cntl = TO_DCN31_PANEL_CNTL(panel_cntl);
  71         struct dc_dmub_srv *dc_dmub_srv = panel_cntl->ctx->dmub_srv;
  72         union dmub_rb_cmd cmd;
  73
  74         if (!dc_dmub_srv)
  75                 return 0;
  76
  77         memset(&cmd, 0, sizeof(cmd));
  78         cmd.panel_cntl.header.type = DMUB_CMD__PANEL_CNTL;
  79         cmd.panel_cntl.header.sub_type = DMUB_CMD__PANEL_CNTL_HW_INIT;
  80         cmd.panel_cntl.header.payload_bytes = sizeof(cmd.panel_cntl.data);
  81         cmd.panel_cntl.data.inst = dcn31_panel_cntl->base.inst;
  82         cmd.panel_cntl.data.bl_pwm_cntl = panel_cntl->stored_backlight_registers.BL_PWM_CNTL;
  83         cmd.panel_cntl.data.bl_pwm_period_cntl = panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL;
  84         cmd.panel_cntl.data.bl_pwm_ref_div1 =
  85                 panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV;
  86
  87         if (!dc_dmub_srv_cmd_with_reply_data(dc_dmub_srv, &cmd))
  88                 return 0;
  89
  90         panel_cntl->stored_backlight_registers.BL_PWM_CNTL = cmd.panel_cntl.data.bl_pwm_cntl;
  91         panel_cntl->stored_backlight_registers.BL_PWM_CNTL2 = 0; /* unused */
  92         panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL = cmd.panel_cntl.data.bl_pwm_period_cntl;
  93         panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV =
  94                 cmd.panel_cntl.data.bl_pwm_ref_div1;
  95
  96         return cmd.panel_cntl.data.current_backlight;
  97 }
  98
  99 void dcn31_panel_cntl_destroy(struct panel_cntl **panel_cntl)
 100 {
 101         struct dcn31_panel_cntl *dcn31_panel_cntl = TO_DCN31_PANEL_CNTL(*panel_cntl);
 102
 103         kfree(dcn31_panel_cntl);
 104         *panel_cntl = NULL;
 105 }
 106
 107 bool dcn31_is_panel_backlight_on(struct panel_cntl *panel_cntl)
 108 {
 109         union dmub_rb_cmd cmd;
 110
 111         if (!dcn31_query_backlight_info(panel_cntl, &cmd))
 112                 return false;
 113
 114         return cmd.panel_cntl.data.is_backlight_on;
 115 }
 116
 117 bool dcn31_is_panel_powered_on(struct panel_cntl *panel_cntl)
 118 {
 119         union dmub_rb_cmd cmd;
 120
 121         if (!dcn31_query_backlight_info(panel_cntl, &cmd))
 122                 return false;
 123
 124         return cmd.panel_cntl.data.is_powered_on;
 125 }
 126
 127 void dcn31_store_backlight_level(struct panel_cntl *panel_cntl)
 128 {
 129         union dmub_rb_cmd cmd;
 130
 131         if (!dcn31_query_backlight_info(panel_cntl, &cmd))
 132                 return;
 133
 134         panel_cntl->stored_backlight_registers.BL_PWM_CNTL = cmd.panel_cntl.data.bl_pwm_cntl;
 135         panel_cntl->stored_backlight_registers.BL_PWM_CNTL2 = 0; /* unused */
 136         panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL = cmd.panel_cntl.data.bl_pwm_period_cntl;
 137         panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV =
 138                 cmd.panel_cntl.data.bl_pwm_ref_div1;
 139 }
 140
 141 static const struct panel_cntl_funcs dcn31_link_panel_cntl_funcs = {
 142         .destroy = dcn31_panel_cntl_destroy,
 143         .hw_init = dcn31_panel_cntl_hw_init,
 144         .is_panel_backlight_on = dcn31_is_panel_backlight_on,
 145         .is_panel_powered_on = dcn31_is_panel_powered_on,
 146         .store_backlight_level = dcn31_store_backlight_level,
 147         .get_current_backlight = dcn31_get_16_bit_backlight_from_pwm,
 148 };
 149
 150 void dcn31_panel_cntl_construct(
 151         struct dcn31_panel_cntl *dcn31_panel_cntl,
 152         const struct panel_cntl_init_data *init_data)
 153 {
 154         dcn31_panel_cntl->base.funcs = &dcn31_link_panel_cntl_funcs;
 155         dcn31_panel_cntl->base.ctx = init_data->ctx;
 156         dcn31_panel_cntl->base.inst = init_data->inst;
 157 }