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author | Libreboot Contributor <contributor@libreboot.org> | 2020-03-18 17:20:14 +0100 |
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committer | Libreboot Contributor <contributor@libreboot.org> | 2020-03-18 17:20:27 +0100 |
commit | 0f6ea1c9e0a25a9b7546f96f27cef8841f0d09b5 (patch) | |
tree | a28b9403123dd6204eb2dd8cb44eada12c169f4b /i18n/fr_FR/resources/utilities/i945gpu | |
parent | 6e5bdd1271059a9c61c80b21001fd3d14ff25045 (diff) | |
download | librebootfr-0f6ea1c9e0a25a9b7546f96f27cef8841f0d09b5.tar.gz librebootfr-0f6ea1c9e0a25a9b7546f96f27cef8841f0d09b5.zip |
Creation of i18n folder containing translations of the libreboot project. Added french one, not finished.
Diffstat (limited to 'i18n/fr_FR/resources/utilities/i945gpu')
-rwxr-xr-x | i18n/fr_FR/resources/utilities/i945gpu/intel-regs.py | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/i18n/fr_FR/resources/utilities/i945gpu/intel-regs.py b/i18n/fr_FR/resources/utilities/i945gpu/intel-regs.py new file mode 100755 index 00000000..5767d4a5 --- /dev/null +++ b/i18n/fr_FR/resources/utilities/i945gpu/intel-regs.py @@ -0,0 +1,108 @@ +#!/usr/bin/env python2 +# -*- coding: utf-8 -*- +# Copyright (C) 2014 Michał Masłowski <mtjm@mtjm.eu> +# +# Licensed under copyleft-next version 0.3.0. See +# https://gitorious.org/copyleft-next/copyleft-next/raw/master:Releases/copyleft-next-0.3.0 +# for more information. + +"""Get values of interesting i945 graphics parameters from a running system. + +This script might show the values for GPU registers specified in +devicetree.cb on coreboot mainboard ports using i945 native VGA init +from <http://review.coreboot.org/#/c/5320/>. + +Run as root. +""" + + +import mmap +import re +import struct +import subprocess + + +_MEMORY = re.compile(r"^\s+Memory\s+at\s+([0-9a-f]+)\s+\(32-bit, non-prefetchable\)\s+\[size=[0-9]+K\]$") + + +def get_pci_data(): + # lspci has a machine readable format, but it doesn't have the needed data. + for devid in ("8086:27a2",): + lspci = subprocess.Popen(("lspci", "-vn", "-d", devid), + stdout=subprocess.PIPE, + stderr=subprocess.PIPE) + address = None + memory = None + for line in lspci.communicate()[0].split("\n"): + if line and line[0] == "0": + address = line.split()[0] + match = _MEMORY.match(line) + if match is not None: + memory = int(match.group(1), 16) + break + yield (address, memory) + + +def config_byte(address, offset): + """Return byte at specified offset in PCI config space of device + identified by address.""" + with open("/sys/bus/pci/devices/0000:%s/config" % address, "rb") as f: + f.seek(offset) + return struct.unpack("=B", f.read(1)) + + +addr0, func0 = list(get_pci_data())[0] + + +def read32(fo, base, offset): + memory = mmap.mmap(fo.fileno(), offset + 4, + mmap.MAP_SHARED, mmap.ACCESS_READ, + offset=base) + try: + memory.seek(offset) + val = memory.read(4) + return struct.unpack("=I", val)[0] + finally: + memory.close() + +# Some i915 register names. +PORT_HOTPLUG_EN = 0x61110 +BLC_PWM_CTL = 0x61254 +LVDS = 0x61180 + +# Bits in LVDS. +LVDS_CLOCK_B_POWERUP_ALL = 3 << 4 +LVDS_CLOCK_BOTH_POWERUP_ALL = 3 << 2 + +# Expansion of DPLL(1). +DPLL1 = ((0x06014) + (1)*((0x06018)-(0x06014))) + +# Bits there. +DPLL_INTEGRATED_CLOCK_VLV = (1<<13) +DPLL_INTEGRATED_CRI_CLK_VLV = (1<<14) + +if __name__ == "__main__": + with open("/dev/mem", "rb") as mem: + print "gpu_hotplug = 0x%08x" % read32(mem, func0, PORT_HOTPLUG_EN) + dpll = read32(mem, func0, DPLL1) + spread_spectrum = dpll & (DPLL_INTEGRATED_CLOCK_VLV \ + | DPLL_INTEGRATED_CRI_CLK_VLV) + if spread_spectrum != 0: + spread_spectrum = 1 + print "gpu_lvds_use_spread_spectrum_clock = %d" % spread_spectrum + lvds = read32(mem, func0, LVDS) + dual_channel = lvds & (LVDS_CLOCK_B_POWERUP_ALL \ + | LVDS_CLOCK_BOTH_POWERUP_ALL) + if dual_channel != 0: + dual_channel = 1 + print "gpu_lvds_is_dual_channel = %d" % dual_channel + backlight = read32(mem, func0, BLC_PWM_CTL) + print "gpu_backlight = 0x%08x" % backlight + # Using display clock from i945_get_display_clock_speed in + # drivers/gpu/drm/i915/intel_display.c. Result multiplied by + # two to match BIOS-reported PWM frequency on my X60t. + mod_freq = 2 * 400000000 / ((backlight >> 16) * 128.0) + print "backlight modulation frequency = %f Hz" % mod_freq + print "duty cycle = %d%%" % (100.0 * (backlight & 0xffff) + / (backlight >> 16)) + print "legacy backlight brightness = 0x%02x" % config_byte(addr0, 0xf4) |