/* SPDX-License-Identifier: GPL-2.0-only */ #include <commonlib/helpers.h> #include <device/mmio.h> #include <device/pci_rom.h> #include <device/resource.h> #include <drivers/intel/gma/i915.h> #include <drivers/intel/gma/i915_reg.h> #include <intelblocks/graphics.h> #include <soc/ramstage.h> #include <soc/systemagent.h> #include <types.h> void graphics_soc_panel_init(struct device *dev) { struct soc_intel_skylake_config *conf = config_of(dev); const struct i915_gpu_panel_config *panel_cfg; struct resource *mmio_res; uint8_t *base; u32 reg32; if (!conf) return; panel_cfg = &conf->panel_cfg; mmio_res = probe_resource(dev, PCI_BASE_ADDRESS_0); if (!mmio_res || !mmio_res->base) return; base = (void *)(uintptr_t)mmio_res->base; reg32 = ((panel_cfg->up_delay_ms * 10) & 0x1fff) << 16; reg32 |= (panel_cfg->backlight_on_delay_ms * 10) & 0x1fff; write32(base + PCH_PP_ON_DELAYS, reg32); reg32 = ((panel_cfg->down_delay_ms * 10) & 0x1fff) << 16; reg32 |= (panel_cfg->backlight_off_delay_ms * 10) & 0x1fff; write32(base + PCH_PP_OFF_DELAYS, reg32); reg32 = read32(base + PCH_PP_DIVISOR); reg32 &= ~0x1f; reg32 |= (DIV_ROUND_UP(panel_cfg->cycle_delay_ms, 100) + 1) & 0x1f; write32(base + PCH_PP_DIVISOR, reg32); /* So far all devices seem to use the PCH PWM function. The CPU PWM registers are all zero after reset. */ if (panel_cfg->backlight_pwm_hz) { /* Reference clock is 24MHz. We can choose either a 16 or a 128 step increment. Use 16 if we would have less than 100 steps otherwise. */ const unsigned int hz_limit = 24 * 1000 * 1000 / 128 / 100; unsigned int pwm_increment, pwm_period; u32 south_chicken1; south_chicken1 = read32(base + SOUTH_CHICKEN1); if (panel_cfg->backlight_pwm_hz > hz_limit) { pwm_increment = 16; south_chicken1 &= ~1; } else { pwm_increment = 128; south_chicken1 |= 1; } write32(base + SOUTH_CHICKEN1, south_chicken1); pwm_period = 24 * 1000 * 1000 / pwm_increment / panel_cfg->backlight_pwm_hz; /* Start with a 50% duty cycle. */ write32(base + BLC_PWM_PCH_CTL2, pwm_period << 16 | pwm_period / 2); write32(base + BLC_PWM_PCH_CTL1, !!panel_cfg->backlight_polarity << 29 | BLM_PCH_PWM_ENABLE); } } const struct i915_gpu_controller_info * intel_igd_get_controller_info(const struct device *device) { struct soc_intel_skylake_config *chip = device->chip_info; return &chip->gfx; } /* * Some VGA option roms are used for several chipsets but they only have one PCI ID in their * header. If we encounter such an option rom, we need to do the mapping ourselves. */ u32 map_oprom_vendev(u32 vendev) { u32 new_vendev = vendev; switch (vendev) { case 0x80865916: /* PCI_DID_INTEL_KBL_GT2_SULTM */ case 0x80865917: /* PCI_DID_INTEL_KBL_GT2_SULTMR */ new_vendev = SA_IGD_OPROM_VENDEV; break; } return new_vendev; }