LXR linux/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel

   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
  41static 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
  58static 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
  68uint32_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
  99void 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
 107bool 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
 117bool 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
 127void 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
 141static 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
 150void 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}
 158