| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/mmio.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <drivers/intel/gma/edid.h> |
| #include <drivers/intel/gma/opregion.h> |
| #include <drivers/intel/gma/libgfxinit.h> |
| #include <string.h> |
| #include <device/pci_ops.h> |
| #include <commonlib/helpers.h> |
| #include <types.h> |
| |
| #include "drivers/intel/gma/i915_reg.h" |
| #include "chip.h" |
| #include "gm45.h" |
| |
| static struct resource *gtt_res = NULL; |
| |
| u32 gtt_read(u32 reg) |
| { |
| return read32(res2mmio(gtt_res, reg, 0)); |
| } |
| |
| void gtt_write(u32 reg, u32 data) |
| { |
| write32(res2mmio(gtt_res, reg, 0), data); |
| } |
| |
| static u32 get_cdclk(struct device *const dev) |
| { |
| const u16 cdclk_sel = pci_read_config16(dev, GCFGC_OFFSET) & GCFGC_CD_MASK; |
| |
| switch (mchbar_read8(HPLLVCO_MCHBAR) & 0x7) { |
| case VCO_2666: |
| case VCO_4000: |
| case VCO_5333: |
| return cdclk_sel ? 333333333 : 222222222; |
| case VCO_3200: |
| return cdclk_sel ? 320000000 : 228571429; |
| default: |
| printk(BIOS_WARNING, |
| "Unknown VCO frequency, using default cdclk.\n"); |
| return 222222222; |
| } |
| } |
| |
| static u32 freq_to_blc_pwm_ctl(struct device *const dev, |
| u16 pwm_freq, u8 duty_perc) |
| { |
| u32 blc_mod; |
| |
| blc_mod = get_cdclk(dev) / (128 * pwm_freq); |
| |
| if (duty_perc <= 100) |
| return (blc_mod << 16) | (blc_mod * duty_perc / 100); |
| else |
| return (blc_mod << 16) | blc_mod; |
| } |
| |
| u16 get_blc_pwm_freq_value(const char *edid_ascii_string) |
| { |
| static u16 blc_pwm_freq; |
| const struct blc_pwm_t *blc_pwm; |
| int i; |
| int blc_array_len; |
| |
| /* Prevent null-deref on strcmp() below */ |
| if (blc_pwm_freq > 0 || !edid_ascii_string) |
| return blc_pwm_freq; |
| |
| blc_array_len = get_blc_values(&blc_pwm); |
| /* Find EDID string and pwm freq in lookup table */ |
| for (i = 0; i < blc_array_len; i++) { |
| if (!strcmp(blc_pwm[i].ascii_string, edid_ascii_string)) { |
| blc_pwm_freq = blc_pwm[i].pwm_freq; |
| printk(BIOS_DEBUG, "Found EDID string: %s in lookup table, pwm: %dHz\n", |
| blc_pwm[i].ascii_string, blc_pwm_freq); |
| break; |
| } |
| } |
| |
| if (i == blc_array_len) |
| printk(BIOS_NOTICE, "Your panels EDID `%s` wasn't found in the" |
| "lookup table.\n You may have issues with your panels" |
| "backlight.\n If you want to help improving coreboot" |
| "please report: this EDID string\n and the result" |
| "of `intel_read read BLC_PWM_CTL`" |
| "(from intel-gpu-tools)\n while running vendor BIOS\n", |
| edid_ascii_string); |
| |
| return blc_pwm_freq; |
| } |
| |
| static void gma_pm_init_post_vbios(struct device *const dev, |
| const char *edid_ascii_string) |
| { |
| const struct northbridge_intel_gm45_config *const conf = dev->chip_info; |
| |
| u32 reg32; |
| u8 reg8; |
| u16 pwm_freq; |
| |
| /* Setup Panel Power On Delays */ |
| reg32 = gtt_read(PP_ON_DELAYS); |
| if (!reg32) { |
| reg32 = (conf->gpu_panel_power_up_delay & 0x1fff) << 16; |
| reg32 |= (conf->gpu_panel_power_backlight_on_delay & 0x1fff); |
| gtt_write(PP_ON_DELAYS, reg32); |
| } |
| |
| /* Setup Panel Power Off Delays */ |
| reg32 = gtt_read(PP_OFF_DELAYS); |
| if (!reg32) { |
| reg32 = (conf->gpu_panel_power_down_delay & 0x1fff) << 16; |
| reg32 |= (conf->gpu_panel_power_backlight_off_delay & 0x1fff); |
| gtt_write(PP_OFF_DELAYS, reg32); |
| } |
| |
| /* Setup Panel Power Cycle Delay */ |
| if (conf->gpu_panel_power_cycle_delay) { |
| reg32 = (get_cdclk(dev) / 20000 - 1) |
| << PP_REFERENCE_DIVIDER_SHIFT; |
| reg32 |= conf->gpu_panel_power_cycle_delay & 0x1f; |
| gtt_write(PP_DIVISOR, reg32); |
| } |
| |
| /* Enable Backlight */ |
| gtt_write(BLC_PWM_CTL2, (1 << 31)); |
| reg8 = 100; |
| if (conf->duty_cycle != 0) |
| reg8 = conf->duty_cycle; |
| pwm_freq = get_blc_pwm_freq_value(edid_ascii_string); |
| if (pwm_freq == 0 && conf->default_pwm_freq != 0) |
| pwm_freq = conf->default_pwm_freq; |
| |
| if (pwm_freq == 0) |
| gtt_write(BLC_PWM_CTL, 0x06100610); |
| else |
| gtt_write(BLC_PWM_CTL, freq_to_blc_pwm_ctl(dev, pwm_freq, |
| reg8)); |
| } |
| |
| const char *gm45_get_lvds_edid_str(struct device *dev) |
| { |
| u8 *mmio; |
| u8 edid_data_lvds[128]; |
| struct edid edid_lvds; |
| static char edid_str[EDID_ASCII_STRING_LENGTH + 1]; |
| |
| if (edid_str[0]) |
| return edid_str; |
| if (!gtt_res) |
| gtt_res = probe_resource(dev, PCI_BASE_ADDRESS_0); |
| if (!gtt_res) |
| return NULL; |
| mmio = res2mmio(gtt_res, 0, 0); |
| |
| printk(BIOS_DEBUG, "LVDS EDID\n"); |
| intel_gmbus_read_edid(mmio + GMBUS0, GMBUS_PORT_PANEL, 0x50, |
| edid_data_lvds, sizeof(edid_data_lvds)); |
| intel_gmbus_stop(mmio + GMBUS0); |
| |
| if (decode_edid(edid_data_lvds, sizeof(edid_data_lvds), &edid_lvds) |
| != EDID_CONFORMANT) |
| return NULL; |
| memcpy(edid_str, edid_lvds.ascii_string, sizeof(edid_str)); |
| return edid_str; |
| } |
| |
| static void gma_func0_init(struct device *dev) |
| { |
| u8 *mmio; |
| const struct northbridge_intel_gm45_config *const conf = dev->chip_info; |
| const char *edid_str; |
| |
| intel_gma_init_igd_opregion(); |
| |
| edid_str = gm45_get_lvds_edid_str(dev); |
| if (!edid_str) |
| printk(BIOS_ERR, "Failed to obtain LVDS EDID string!\n"); |
| |
| /* gtt_res should have been inited in gm45_get_lvds_edid_str() */ |
| if (!gtt_res) |
| return; |
| mmio = res2mmio(gtt_res, 0, 0); |
| |
| /* |
| * GTT base is at a 2M offset and is 2M big. If GTT is smaller than 2M |
| * cycles are simply not decoded which is fine. |
| */ |
| pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER); |
| memset(mmio + 2 * MiB, 0, 2 * MiB); |
| |
| if (CONFIG(NO_GFX_INIT)) |
| pci_and_config16(dev, PCI_COMMAND, ~PCI_COMMAND_MASTER); |
| |
| if (!CONFIG(MAINBOARD_USE_LIBGFXINIT)) { |
| /* PCI Init, will run VBIOS */ |
| printk(BIOS_DEBUG, "Initialising IGD using VBIOS\n"); |
| pci_dev_init(dev); |
| } |
| |
| /* Post VBIOS init */ |
| gma_pm_init_post_vbios(dev, edid_str); |
| |
| if (CONFIG(MAINBOARD_USE_LIBGFXINIT) && !acpi_is_wakeup_s3()) { |
| int vga_disable = (pci_read_config16(dev, D0F0_GGC) & 2) >> 1; |
| if (vga_disable) { |
| printk(BIOS_INFO, |
| "IGD is not decoding legacy VGA MEM and IO: skipping NATIVE graphic init\n"); |
| } else { |
| int lightup_ok; |
| gma_gfxinit(&lightup_ok); |
| /* Linux relies on VBT for panel info. */ |
| generate_fake_intel_oprom(&conf->gfx, dev, "$VBT CANTIGA"); |
| } |
| } |
| } |
| |
| static void gma_generate_ssdt(const struct device *device) |
| { |
| const struct northbridge_intel_gm45_config *chip = device->chip_info; |
| |
| drivers_intel_gma_displays_ssdt_generate(&chip->gfx); |
| } |
| |
| static const char *gma_acpi_name(const struct device *dev) |
| { |
| return "GFX0"; |
| } |
| |
| static struct device_operations gma_func0_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .acpi_fill_ssdt = gma_generate_ssdt, |
| .init = gma_func0_init, |
| .ops_pci = &pci_dev_ops_pci, |
| .acpi_name = gma_acpi_name, |
| }; |
| |
| static const unsigned short pci_device_ids[] = |
| { |
| 0x2a42, 0 |
| }; |
| |
| static const struct pci_driver gma __pci_driver = { |
| .ops = &gma_func0_ops, |
| .vendor = PCI_VID_INTEL, |
| .devices = pci_device_ids, |
| }; |