diff options
Diffstat (limited to 'resources/utilities/i945gpu/intel-regs.py')
| -rwxr-xr-x | resources/utilities/i945gpu/intel-regs.py | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/resources/utilities/i945gpu/intel-regs.py b/resources/utilities/i945gpu/intel-regs.py index f16a8d7..5767d4a 100755 --- a/resources/utilities/i945gpu/intel-regs.py +++ b/resources/utilities/i945gpu/intel-regs.py @@ -27,17 +27,31 @@ _MEMORY = re.compile(r"^\s+Memory\s+at\s+([0-9a-f]+)\s+\(32-bit, non-prefetchabl def get_pci_data(): # lspci has a machine readable format, but it doesn't have the needed data. - for devid in "8086:27a2", "8086:27a6": + 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: - yield int(match.group(1), 16) + memory = int(match.group(1), 16) break + yield (address, memory) -func0, func1 = list(get_pci_data()) + +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): @@ -91,3 +105,4 @@ if __name__ == "__main__": 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) |