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intel_bios_reader: Read the child device size from VBT

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New stuff has been added to the end of the child device block at various
times, so using a hardcoded size for the block is a bad idea.
Fortunately the size of the block is listed in the VBT just before the
blocks themselves, so grab it from there.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
This commit is contained in:
Ville Syrjälä 2015-03-25 13:36:52 +02:00
parent c137ac7158
commit b1e756451c
2 changed files with 5 additions and 4 deletions
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2
tools/intel_bios.h
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@ -269,7 +269,7 @@ struct bdb_general_definitions {
* TV and LVDS are missing, so be careful when interpreting * TV and LVDS are missing, so be careful when interpreting
* [4] and [5]. * [4] and [5].
*/ */
struct child_device_config devices[0]; uint8_t devices[0];
/* may be another device block here on some platforms */ /* may be another device block here on some platforms */
} __attribute__ ((packed)); } __attribute__ ((packed));

7
tools/intel_bios_reader.c
View File

@ -341,7 +341,6 @@ static void dump_child_device(struct child_device_config *child)
static void dump_general_definitions(const struct bdb_block *block) static void dump_general_definitions(const struct bdb_block *block)
{ {
struct bdb_general_definitions *defs = block->data; struct bdb_general_definitions *defs = block->data;
struct child_device_config *child;
int i; int i;
int child_device_num; int child_device_num;
@ -354,9 +353,11 @@ static void dump_general_definitions(const struct bdb_block *block)
printf("\tBoot display type: 0x%02x%02x\n", defs->boot_display[1], printf("\tBoot display type: 0x%02x%02x\n", defs->boot_display[1],
defs->boot_display[0]); defs->boot_display[0]);
printf("\tTV data block present: %s\n", YESNO(tv_present)); printf("\tTV data block present: %s\n", YESNO(tv_present));
child_device_num = (block->size - sizeof(*defs)) / sizeof(*child); printf("\tChild device size: %d\n", defs->child_dev_size);
child_device_num = (block->size - sizeof(*defs)) /
defs->child_dev_size;
for (i = 0; i < child_device_num; i++) for (i = 0; i < child_device_num; i++)
dump_child_device(&defs->devices[i]); dump_child_device((void*)&defs->devices[i * defs->child_dev_size]);
} }
static void dump_child_devices(const struct bdb_block *block) static void dump_child_devices(const struct bdb_block *block)