commit 75067ddecf21271631bc018d2fb23ddd09b66aae
Author: Antti Koskipaa <antti.koskipaa@xxxxxxxxxxxxxxx>
Date: Fri Jul 10 14:10:55 2015 +0300
drm/i915: Per-DDI I_boost override
increased size of union child_device_config without taking into account
the size check in parse_sdvo_device_mapping(). Switch the function over
to using the legacy struct only.
Fixes: 75067ddecf21 ("drm/i915: Per-DDI I_boost override")
Cc: Antti Koskipaa <antti.koskipaa@xxxxxxxxxxxxxxx>
Cc: David Weinehall <david.weinehall@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_bios.c | 50 +++++++++++++++++++--------------------
1 file changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 8e46149bafdd..1b7e1a591a37 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -401,7 +401,7 @@ parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
{
struct sdvo_device_mapping *p_mapping;
const struct bdb_general_definitions *p_defs;
- const union child_device_config *p_child;
+ const struct old_child_dev_config *child; /* legacy */
int i, child_device_num, count;
u16 block_size;
@@ -410,14 +410,14 @@ parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
return;
}
- /* judge whether the size of child device meets the requirements.
- * If the child device size obtained from general definition block
- * is different with sizeof(struct child_device_config), skip the
- * parsing of sdvo device info
+
+ /*
+ * Only parse SDVO mappings when the general definitions block child
+ * device size matches that of the *legacy* child device config
+ * struct. Thus, SDVO mapping will be skipped for newer VBT.
*/
- if (p_defs->child_dev_size != sizeof(*p_child)) {
- /* different child dev size . Ignore it */
- DRM_DEBUG_KMS("different child size is found. Invalid.\n");
+ if (p_defs->child_dev_size != sizeof(*child)) {
+ DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
return;
}
/* get the block size of general definitions */
@@ -427,37 +427,37 @@ parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
p_defs->child_dev_size;
count = 0;
for (i = 0; i < child_device_num; i++) {
- p_child = child_device_ptr(p_defs, i);
- if (!p_child->old.device_type) {
+ child = &child_device_ptr(p_defs, i)->old;
+ if (!child->device_type) {
/* skip the device block if device type is invalid */
continue;
}
- if (p_child->old.slave_addr != SLAVE_ADDR1 &&
- p_child->old.slave_addr != SLAVE_ADDR2) {
+ if (child->slave_addr != SLAVE_ADDR1 &&
+ child->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->old.dvo_port != DEVICE_PORT_DVOB &&
- p_child->old.dvo_port != DEVICE_PORT_DVOC) {
+ if (child->dvo_port != DEVICE_PORT_DVOB &&
+ child->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->old.slave_addr,
- (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
- "SDVOB" : "SDVOC");
- p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
+ " %s port\n",
+ child->slave_addr,
+ (child->dvo_port == DEVICE_PORT_DVOB) ?
+ "SDVOB" : "SDVOC");
+ p_mapping = &(dev_priv->sdvo_mappings[child->dvo_port - 1]);
if (!p_mapping->initialized) {
- 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->dvo_port = child->dvo_port;
+ p_mapping->slave_addr = child->slave_addr;
+ p_mapping->dvo_wiring = child->dvo_wiring;
+ p_mapping->ddc_pin = child->ddc_pin;
+ p_mapping->i2c_pin = child->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,
@@ -469,7 +469,7 @@ parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
"two SDVO device.\n");
}
- if (p_child->old.slave2_addr) {
+ if (child->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"
--
2.1.4
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