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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <stdint.h>
#include <commonlib/helpers.h>
#include <device/device.h>
#include <device/mmio.h>
#include <device/pci_def.h>
#include <intelblocks/graphics.h>
#include <drivers/intel/gma/i915_reg.h>
#include "chip.h"
static void graphics_configure_panelpower(
const struct i915_gpu_panel_config *const panel_cfg,
uint8_t *const mmio, const unsigned int panel_idx)
{
const unsigned int offset = panel_idx * 0x100;
uint32_t reg32;
reg32 = ((DIV_ROUND_UP(panel_cfg->cycle_delay_ms, 100) + 1) & 0x1f) << 4;
reg32 |= PANEL_POWER_RESET;
write32(mmio + PCH_PP_CONTROL + offset, reg32);
reg32 = ((panel_cfg->up_delay_ms * 10) & 0x1fff) << 16;
reg32 |= (panel_cfg->backlight_on_delay_ms * 10) & 0x1fff;
write32(mmio + PCH_PP_ON_DELAYS + offset, reg32);
reg32 = ((panel_cfg->down_delay_ms * 10) & 0x1fff) << 16;
reg32 |= (panel_cfg->backlight_off_delay_ms * 10) & 0x1fff;
write32(mmio + PCH_PP_OFF_DELAYS + offset, reg32);
}
static void graphics_configure_backlight(
const struct i915_gpu_panel_config *const panel_cfg,
uint8_t *const mmio, const unsigned int panel_idx)
{
if (!panel_cfg->backlight_pwm_hz)
return;
const unsigned int pwm_period = 19200 * 1000 / panel_cfg->backlight_pwm_hz;
write32(mmio + BXT_BLC_PWM_FREQ(panel_idx), pwm_period);
write32(mmio + BXT_BLC_PWM_DUTY(panel_idx), pwm_period / 2);
write32(mmio + BXT_BLC_PWM_CTL(panel_idx),
panel_cfg->backlight_polarity ? BXT_BLC_PWM_POLARITY : 0);
/* Second backlight control uses display utility pin. */
if (panel_idx == 1) {
write32(mmio + UTIL_PIN_CTL, 0); /* Make sure it's disabled, don't know
what FSP might have done already. */
write32(mmio + UTIL_PIN_CTL, UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE);
}
}
void graphics_soc_panel_init(struct device *const dev)
{
const struct soc_intel_apollolake_config *const conf = dev->chip_info;
const struct resource *mmio_res;
void *mmio;
unsigned int i;
/* Some hardware configuration first. */
if (!conf)
return;
mmio_res = probe_resource(dev, PCI_BASE_ADDRESS_0);
if (!mmio_res || !mmio_res->base)
return;
mmio = (void *)(uintptr_t)mmio_res->base;
for (i = 0; i < ARRAY_SIZE(conf->panel_cfg); ++i)
graphics_configure_panelpower(&conf->panel_cfg[i], mmio, i);
for (i = 0; i < ARRAY_SIZE(conf->panel_cfg); ++i)
graphics_configure_backlight(&conf->panel_cfg[i], mmio, i);
}
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