drm/i915: VBT's child_device_config changes over time
We currently treat the child_device_config as a simple struct, but
this is not correct: new BDB versions change the meaning of some
offsets, so the struct needs to be adjusted for each version.
Since there are too many changes (today we're in version 170!), making
a big versioned union would be too complicated, so child_device_config
is now a union of 3 things: (i) a "raw" byte array that's safe to use
anywhere; (ii) an "old" structure that's the one we've been using and
should be safe to keep in the SDVO and TV code; and (iii) a "common"
structure that should contain only fields that are common for all the
known VBT versions.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 6668873..33003b9 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -389,7 +389,7 @@
{
struct sdvo_device_mapping *p_mapping;
struct bdb_general_definitions *p_defs;
- struct child_device_config *p_child;
+ union child_device_config *p_child;
int i, child_device_num, count;
u16 block_size;
@@ -416,36 +416,36 @@
count = 0;
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
- if (!p_child->device_type) {
+ if (!p_child->old.device_type) {
/* skip the device block if device type is invalid */
continue;
}
- if (p_child->slave_addr != SLAVE_ADDR1 &&
- p_child->slave_addr != SLAVE_ADDR2) {
+ if (p_child->old.slave_addr != SLAVE_ADDR1 &&
+ p_child->old.slave_addr != SLAVE_ADDR2) {
/*
* If the slave address is neither 0x70 nor 0x72,
* it is not a SDVO device. Skip it.
*/
continue;
}
- if (p_child->dvo_port != DEVICE_PORT_DVOB &&
- p_child->dvo_port != DEVICE_PORT_DVOC) {
+ if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
+ p_child->old.dvo_port != DEVICE_PORT_DVOC) {
/* skip the incorrect SDVO port */
DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
continue;
}
DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
" %s port\n",
- p_child->slave_addr,
- (p_child->dvo_port == DEVICE_PORT_DVOB) ?
+ p_child->old.slave_addr,
+ (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
"SDVOB" : "SDVOC");
- p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
+ p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
if (!p_mapping->initialized) {
- p_mapping->dvo_port = p_child->dvo_port;
- p_mapping->slave_addr = p_child->slave_addr;
- p_mapping->dvo_wiring = p_child->dvo_wiring;
- p_mapping->ddc_pin = p_child->ddc_pin;
- p_mapping->i2c_pin = p_child->i2c_pin;
+ p_mapping->dvo_port = p_child->old.dvo_port;
+ p_mapping->slave_addr = p_child->old.slave_addr;
+ p_mapping->dvo_wiring = p_child->old.dvo_wiring;
+ p_mapping->ddc_pin = p_child->old.ddc_pin;
+ p_mapping->i2c_pin = p_child->old.i2c_pin;
p_mapping->initialized = 1;
DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
p_mapping->dvo_port,
@@ -457,7 +457,7 @@
DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
"two SDVO device.\n");
}
- if (p_child->slave2_addr) {
+ if (p_child->old.slave2_addr) {
/* Maybe this is a SDVO device with multiple inputs */
/* And the mapping info is not added */
DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
@@ -588,7 +588,7 @@
struct bdb_header *bdb)
{
struct bdb_general_definitions *p_defs;
- struct child_device_config *p_child, *child_dev_ptr;
+ union child_device_config *p_child, *child_dev_ptr;
int i, child_device_num, count;
u16 block_size;
@@ -616,7 +616,7 @@
/* get the number of child device that is present */
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
- if (!p_child->device_type) {
+ if (!p_child->common.device_type) {
/* skip the device block if device type is invalid */
continue;
}
@@ -636,7 +636,7 @@
count = 0;
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
- if (!p_child->device_type) {
+ if (!p_child->common.device_type) {
/* skip the device block if device type is invalid */
continue;
}