1 /* 2 * Copyright 2020 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 "dcn301_panel_cntl.h" 30 #include "atom.h" 31 32 #define TO_DCN301_PANEL_CNTL(panel_cntl)\ 33 container_of(panel_cntl, struct dcn301_panel_cntl, base) 34 35 #define CTX \ 36 dcn301_panel_cntl->base.ctx 37 38 #define DC_LOGGER \ 39 dcn301_panel_cntl->base.ctx->logger 40 41 #define REG(reg)\ 42 dcn301_panel_cntl->regs->reg 43 44 #undef FN 45 #define FN(reg_name, field_name) \ 46 dcn301_panel_cntl->shift->field_name, dcn301_panel_cntl->mask->field_name 47 48 static unsigned int dcn301_get_16_bit_backlight_from_pwm(struct panel_cntl *panel_cntl) 49 { 50 uint64_t current_backlight; 51 uint32_t round_result; 52 uint32_t bl_period, bl_int_count; 53 uint32_t bl_pwm, fractional_duty_cycle_en; 54 uint32_t bl_period_mask, bl_pwm_mask; 55 struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl); 56 57 REG_GET(BL_PWM_PERIOD_CNTL, BL_PWM_PERIOD, &bl_period); 58 REG_GET(BL_PWM_PERIOD_CNTL, BL_PWM_PERIOD_BITCNT, &bl_int_count); 59 60 REG_GET(BL_PWM_CNTL, BL_ACTIVE_INT_FRAC_CNT, &bl_pwm); 61 REG_GET(BL_PWM_CNTL, BL_PWM_FRACTIONAL_EN, &fractional_duty_cycle_en); 62 63 if (bl_int_count == 0) 64 bl_int_count = 16; 65 66 bl_period_mask = (1 << bl_int_count) - 1; 67 bl_period &= bl_period_mask; 68 69 bl_pwm_mask = bl_period_mask << (16 - bl_int_count); 70 71 if (fractional_duty_cycle_en == 0) 72 bl_pwm &= bl_pwm_mask; 73 else 74 bl_pwm &= 0xFFFF; 75 76 current_backlight = (uint64_t)bl_pwm << (1 + bl_int_count); 77 78 if (bl_period == 0) 79 bl_period = 0xFFFF; 80 81 current_backlight = div_u64(current_backlight, bl_period); 82 current_backlight = (current_backlight + 1) >> 1; 83 84 current_backlight = (uint64_t)(current_backlight) * bl_period; 85 86 round_result = (uint32_t)(current_backlight & 0xFFFFFFFF); 87 88 round_result = (round_result >> (bl_int_count-1)) & 1; 89 90 current_backlight >>= bl_int_count; 91 current_backlight += round_result; 92 93 return (uint32_t)(current_backlight); 94 } 95 96 static uint32_t dcn301_panel_cntl_hw_init(struct panel_cntl *panel_cntl) 97 { 98 struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl); 99 uint32_t value; 100 uint32_t current_backlight; 101 102 /* It must not be 0, so we have to restore them 103 * Bios bug w/a - period resets to zero, 104 * restoring to cache values which is always correct 105 */ 106 REG_GET(BL_PWM_CNTL, BL_ACTIVE_INT_FRAC_CNT, &value); 107 108 if (value == 0 || value == 1) { 109 if (panel_cntl->stored_backlight_registers.BL_PWM_CNTL != 0) { 110 REG_WRITE(BL_PWM_CNTL, 111 panel_cntl->stored_backlight_registers.BL_PWM_CNTL); 112 REG_WRITE(BL_PWM_CNTL2, 113 panel_cntl->stored_backlight_registers.BL_PWM_CNTL2); 114 REG_WRITE(BL_PWM_PERIOD_CNTL, 115 panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL); 116 REG_UPDATE(PWRSEQ_REF_DIV, 117 BL_PWM_REF_DIV, 118 panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV); 119 } else { 120 /* TODO: Note: This should not really happen since VBIOS 121 * should have initialized PWM registers on boot. 122 */ 123 REG_WRITE(BL_PWM_CNTL, 0xC000FA00); 124 REG_WRITE(BL_PWM_PERIOD_CNTL, 0x000C0FA0); 125 } 126 } else { 127 panel_cntl->stored_backlight_registers.BL_PWM_CNTL = 128 REG_READ(BL_PWM_CNTL); 129 panel_cntl->stored_backlight_registers.BL_PWM_CNTL2 = 130 REG_READ(BL_PWM_CNTL2); 131 panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL = 132 REG_READ(BL_PWM_PERIOD_CNTL); 133 134 REG_GET(PWRSEQ_REF_DIV, BL_PWM_REF_DIV, 135 &panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV); 136 } 137 138 // Enable the backlight output 139 REG_UPDATE(BL_PWM_CNTL, BL_PWM_EN, 1); 140 141 // Unlock group 2 backlight registers 142 REG_UPDATE(BL_PWM_GRP1_REG_LOCK, 143 BL_PWM_GRP1_REG_LOCK, 0); 144 145 current_backlight = dcn301_get_16_bit_backlight_from_pwm(panel_cntl); 146 147 return current_backlight; 148 } 149 150 static void dcn301_panel_cntl_destroy(struct panel_cntl **panel_cntl) 151 { 152 struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(*panel_cntl); 153 154 kfree(dcn301_panel_cntl); 155 *panel_cntl = NULL; 156 } 157 158 static bool dcn301_is_panel_backlight_on(struct panel_cntl *panel_cntl) 159 { 160 struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl); 161 uint32_t value; 162 163 REG_GET(PWRSEQ_CNTL, PANEL_BLON, &value); 164 165 return value; 166 } 167 168 static bool dcn301_is_panel_powered_on(struct panel_cntl *panel_cntl) 169 { 170 struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl); 171 uint32_t pwr_seq_state, dig_on, dig_on_ovrd; 172 173 REG_GET(PWRSEQ_STATE, PANEL_PWRSEQ_TARGET_STATE_R, &pwr_seq_state); 174 175 REG_GET_2(PWRSEQ_CNTL, PANEL_DIGON, &dig_on, PANEL_DIGON_OVRD, &dig_on_ovrd); 176 177 return (pwr_seq_state == 1) || (dig_on == 1 && dig_on_ovrd == 1); 178 } 179 180 static void dcn301_store_backlight_level(struct panel_cntl *panel_cntl) 181 { 182 struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl); 183 184 panel_cntl->stored_backlight_registers.BL_PWM_CNTL = 185 REG_READ(BL_PWM_CNTL); 186 panel_cntl->stored_backlight_registers.BL_PWM_CNTL2 = 187 REG_READ(BL_PWM_CNTL2); 188 panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL = 189 REG_READ(BL_PWM_PERIOD_CNTL); 190 191 REG_GET(PWRSEQ_REF_DIV, BL_PWM_REF_DIV, 192 &panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV); 193 } 194 195 static const struct panel_cntl_funcs dcn301_link_panel_cntl_funcs = { 196 .destroy = dcn301_panel_cntl_destroy, 197 .hw_init = dcn301_panel_cntl_hw_init, 198 .is_panel_backlight_on = dcn301_is_panel_backlight_on, 199 .is_panel_powered_on = dcn301_is_panel_powered_on, 200 .store_backlight_level = dcn301_store_backlight_level, 201 .get_current_backlight = dcn301_get_16_bit_backlight_from_pwm, 202 }; 203 204 void dcn301_panel_cntl_construct( 205 struct dcn301_panel_cntl *dcn301_panel_cntl, 206 const struct panel_cntl_init_data *init_data, 207 const struct dce_panel_cntl_registers *regs, 208 const struct dcn301_panel_cntl_shift *shift, 209 const struct dcn301_panel_cntl_mask *mask) 210 { 211 dcn301_panel_cntl->regs = regs; 212 dcn301_panel_cntl->shift = shift; 213 dcn301_panel_cntl->mask = mask; 214 215 dcn301_panel_cntl->base.funcs = &dcn301_link_panel_cntl_funcs; 216 dcn301_panel_cntl->base.ctx = init_data->ctx; 217 dcn301_panel_cntl->base.inst = init_data->inst; 218 dcn301_panel_cntl->base.pwrseq_inst = 0; 219 } 220