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/*
* Copyright 2020 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: AMD
*
*/
#include "reg_helper.h"
#include "core_types.h"
#include "dc_dmub_srv.h"
#include "dcn301_panel_cntl.h"
#include "atom.h"
#define TO_DCN301_PANEL_CNTL(panel_cntl)\
container_of(panel_cntl, struct dcn301_panel_cntl, base)
#define CTX \
dcn301_panel_cntl->base.ctx
#define DC_LOGGER \
dcn301_panel_cntl->base.ctx->logger
#define REG(reg)\
dcn301_panel_cntl->regs->reg
#undef FN
#define FN(reg_name, field_name) \
dcn301_panel_cntl->shift->field_name, dcn301_panel_cntl->mask->field_name
static unsigned int dcn301_get_16_bit_backlight_from_pwm(struct panel_cntl *panel_cntl)
{
uint64_t current_backlight;
uint32_t round_result;
uint32_t bl_period, bl_int_count;
uint32_t bl_pwm, fractional_duty_cycle_en;
uint32_t bl_period_mask, bl_pwm_mask;
struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl);
REG_GET(BL_PWM_PERIOD_CNTL, BL_PWM_PERIOD, &bl_period);
REG_GET(BL_PWM_PERIOD_CNTL, BL_PWM_PERIOD_BITCNT, &bl_int_count);
REG_GET(BL_PWM_CNTL, BL_ACTIVE_INT_FRAC_CNT, &bl_pwm);
REG_GET(BL_PWM_CNTL, BL_PWM_FRACTIONAL_EN, &fractional_duty_cycle_en);
if (bl_int_count == 0)
bl_int_count = 16;
bl_period_mask = (1 << bl_int_count) - 1;
bl_period &= bl_period_mask;
bl_pwm_mask = bl_period_mask << (16 - bl_int_count);
if (fractional_duty_cycle_en == 0)
bl_pwm &= bl_pwm_mask;
else
bl_pwm &= 0xFFFF;
current_backlight = (uint64_t)bl_pwm << (1 + bl_int_count);
if (bl_period == 0)
bl_period = 0xFFFF;
current_backlight = div_u64(current_backlight, bl_period);
current_backlight = (current_backlight + 1) >> 1;
current_backlight = (uint64_t)(current_backlight) * bl_period;
round_result = (uint32_t)(current_backlight & 0xFFFFFFFF);
round_result = (round_result >> (bl_int_count-1)) & 1;
current_backlight >>= bl_int_count;
current_backlight += round_result;
return (uint32_t)(current_backlight);
}
static uint32_t dcn301_panel_cntl_hw_init(struct panel_cntl *panel_cntl)
{
struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl);
uint32_t value;
uint32_t current_backlight;
/* It must not be 0, so we have to restore them
* Bios bug w/a - period resets to zero,
* restoring to cache values which is always correct
*/
REG_GET(BL_PWM_CNTL, BL_ACTIVE_INT_FRAC_CNT, &value);
if (value == 0 || value == 1) {
if (panel_cntl->stored_backlight_registers.BL_PWM_CNTL != 0) {
REG_WRITE(BL_PWM_CNTL,
panel_cntl->stored_backlight_registers.BL_PWM_CNTL);
REG_WRITE(BL_PWM_CNTL2,
panel_cntl->stored_backlight_registers.BL_PWM_CNTL2);
REG_WRITE(BL_PWM_PERIOD_CNTL,
panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL);
REG_UPDATE(PWRSEQ_REF_DIV,
BL_PWM_REF_DIV,
panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV);
} else {
/* TODO: Note: This should not really happen since VBIOS
* should have initialized PWM registers on boot.
*/
REG_WRITE(BL_PWM_CNTL, 0xC000FA00);
REG_WRITE(BL_PWM_PERIOD_CNTL, 0x000C0FA0);
}
} else {
panel_cntl->stored_backlight_registers.BL_PWM_CNTL =
REG_READ(BL_PWM_CNTL);
panel_cntl->stored_backlight_registers.BL_PWM_CNTL2 =
REG_READ(BL_PWM_CNTL2);
panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL =
REG_READ(BL_PWM_PERIOD_CNTL);
REG_GET(PWRSEQ_REF_DIV, BL_PWM_REF_DIV,
&panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV);
}
// Enable the backlight output
REG_UPDATE(BL_PWM_CNTL, BL_PWM_EN, 1);
// Unlock group 2 backlight registers
REG_UPDATE(BL_PWM_GRP1_REG_LOCK,
BL_PWM_GRP1_REG_LOCK, 0);
current_backlight = dcn301_get_16_bit_backlight_from_pwm(panel_cntl);
return current_backlight;
}
static void dcn301_panel_cntl_destroy(struct panel_cntl **panel_cntl)
{
struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(*panel_cntl);
kfree(dcn301_panel_cntl);
*panel_cntl = NULL;
}
static bool dcn301_is_panel_backlight_on(struct panel_cntl *panel_cntl)
{
struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl);
uint32_t value;
REG_GET(PWRSEQ_CNTL, PANEL_BLON, &value);
return value;
}
static bool dcn301_is_panel_powered_on(struct panel_cntl *panel_cntl)
{
struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl);
uint32_t pwr_seq_state, dig_on, dig_on_ovrd;
REG_GET(PWRSEQ_STATE, PANEL_PWRSEQ_TARGET_STATE_R, &pwr_seq_state);
REG_GET_2(PWRSEQ_CNTL, PANEL_DIGON, &dig_on, PANEL_DIGON_OVRD, &dig_on_ovrd);
return (pwr_seq_state == 1) || (dig_on == 1 && dig_on_ovrd == 1);
}
static void dcn301_store_backlight_level(struct panel_cntl *panel_cntl)
{
struct dcn301_panel_cntl *dcn301_panel_cntl = TO_DCN301_PANEL_CNTL(panel_cntl);
panel_cntl->stored_backlight_registers.BL_PWM_CNTL =
REG_READ(BL_PWM_CNTL);
panel_cntl->stored_backlight_registers.BL_PWM_CNTL2 =
REG_READ(BL_PWM_CNTL2);
panel_cntl->stored_backlight_registers.BL_PWM_PERIOD_CNTL =
REG_READ(BL_PWM_PERIOD_CNTL);
REG_GET(PWRSEQ_REF_DIV, BL_PWM_REF_DIV,
&panel_cntl->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV);
}
static const struct panel_cntl_funcs dcn301_link_panel_cntl_funcs = {
.destroy = dcn301_panel_cntl_destroy,
.hw_init = dcn301_panel_cntl_hw_init,
.is_panel_backlight_on = dcn301_is_panel_backlight_on,
.is_panel_powered_on = dcn301_is_panel_powered_on,
.store_backlight_level = dcn301_store_backlight_level,
.get_current_backlight = dcn301_get_16_bit_backlight_from_pwm,
};
void dcn301_panel_cntl_construct(
struct dcn301_panel_cntl *dcn301_panel_cntl,
const struct panel_cntl_init_data *init_data,
const struct dce_panel_cntl_registers *regs,
const struct dcn301_panel_cntl_shift *shift,
const struct dcn301_panel_cntl_mask *mask)
{
dcn301_panel_cntl->regs = regs;
dcn301_panel_cntl->shift = shift;
dcn301_panel_cntl->mask = mask;
dcn301_panel_cntl->base.funcs = &dcn301_link_panel_cntl_funcs;
dcn301_panel_cntl->base.ctx = init_data->ctx;
dcn301_panel_cntl->base.inst = init_data->inst;
}
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