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tools/intel_bios_reader: Decode the device type bits

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Each bit in the device type is supposed to mean something. Decode their
meaning.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
This commit is contained in:
Ville Syrjälä 2015-09-11 15:01:16 +03:00
parent a02305260e
commit d8313c3002
2 changed files with 50 additions and 0 deletions
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18
tools/intel_bios.h
View File

@ -142,6 +142,24 @@ struct bdb_general_features {
#define DEVICE_HANDLE_LPF1 0x08
#define DEVICE_HANDLE_LFP2 0x80
/* device type bits */
#define DEVICE_TYPE_CLASS_EXTENSION 15
#define DEVICE_TYPE_POWER_MANAGEMENT 14
#define DEVICE_TYPE_HOTPLUG_SIGNALING 13
#define DEVICE_TYPE_INTERNAL_CONNECTOR 12
#define DEVICE_TYPE_NOT_HDMI_OUTPUT 11
#define DEVICE_TYPE_MIPI_OUTPUT 10
#define DEVICE_TYPE_COMPOSITE_OUTPUT 9
#define DEVICE_TYPE_DIAL_CHANNEL 8
#define DEVICE_TYPE_CONTENT_PROTECTION 7
#define DEVICE_TYPE_HIGH_SPEED_LINK 6
#define DEVICE_TYPE_LVDS_SIGNALING 5
#define DEVICE_TYPE_TMDS_DVI_SIGNALING 4
#define DEVICE_TYPE_VIDEO_SIGNALING 3
#define DEVICE_TYPE_DISPLAYPORT_OUTPUT 2
#define DEVICE_TYPE_DIGITAL_OUTPUT 1
#define DEVICE_TYPE_ANALOG_OUTPUT 0
/* Pre 915 */
#define DEVICE_TYPE_NONE 0x00
#define DEVICE_TYPE_CRT 0x01

32
tools/intel_bios_reader.c
View File

@ -254,6 +254,37 @@ static const char *child_device_type(unsigned short type)
return "unknown";
}
static const char * const child_device_type_bits[] = {
[DEVICE_TYPE_CLASS_EXTENSION] = "Class extension",
[DEVICE_TYPE_POWER_MANAGEMENT] = "Power management",
[DEVICE_TYPE_HOTPLUG_SIGNALING] = "Hotplug signaling",
[DEVICE_TYPE_INTERNAL_CONNECTOR] = "Internal connector",
[DEVICE_TYPE_NOT_HDMI_OUTPUT] = "HDMI output", /* decoded as inverse */
[DEVICE_TYPE_MIPI_OUTPUT] = "MIPI output",
[DEVICE_TYPE_COMPOSITE_OUTPUT] = "Composite output",
[DEVICE_TYPE_DIAL_CHANNEL] = "Dual channel",
[DEVICE_TYPE_CONTENT_PROTECTION] = "Content protection",
[DEVICE_TYPE_HIGH_SPEED_LINK] = "High speel link",
[DEVICE_TYPE_LVDS_SIGNALING] = "LVDS signaling",
[DEVICE_TYPE_TMDS_DVI_SIGNALING] = "TMDS/DVI signaling",
[DEVICE_TYPE_VIDEO_SIGNALING] = "Video signaling",
[DEVICE_TYPE_DISPLAYPORT_OUTPUT] = "DisplayPort output",
[DEVICE_TYPE_DIGITAL_OUTPUT] = "Digital output",
[DEVICE_TYPE_ANALOG_OUTPUT] = "Analog output",
};
static void dump_child_device_type_bits(uint16_t type)
{
int bit;
type ^= 1 << DEVICE_TYPE_NOT_HDMI_OUTPUT;
for (bit = 15; bit >= 0; bit--) {
if (type & (1 << bit))
printf("\t\t\t%s\n", child_device_type_bits[bit]);
}
}
static const struct {
unsigned char handle;
const char *name;
@ -354,6 +385,7 @@ static void dump_child_device(struct child_device_config *child)
child_device_handle(efp->handle));
printf("\t\tDevice type: 0x%04x (%s)\n", efp->device_type,
child_device_type(efp->device_type));
dump_child_device_type_bits(efp->device_type);
printf("\t\tPort: 0x%02x (%s)\n", efp->port,
efp_port(efp->port));
printf("\t\tDDC pin: 0x%02x\n", efp->ddc_pin);