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path: root/drivers/gpu/drm/i915/intel_bios.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.c')
-rw-r--r--drivers/gpu/drm/i915/intel_bios.c86
1 files changed, 85 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 9d78cff..754dd22 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -30,6 +30,8 @@
#include "i915_drv.h"
#include "intel_bios.h"
+#define SLAVE_ADDR1 0x70
+#define SLAVE_ADDR2 0x72
static void *
find_section(struct bdb_header *bdb, int section_id)
@@ -193,6 +195,88 @@ parse_general_features(struct drm_i915_private *dev_priv,
}
}
+static void
+parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct sdvo_device_mapping *p_mapping;
+ struct bdb_general_definitions *p_defs;
+ struct child_device_config *p_child;
+ int i, child_device_num, count;
+ u16 block_size, *block_ptr;
+
+ p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
+ if (!p_defs) {
+ DRM_DEBUG("No general definition block is found\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
+ */
+ if (p_defs->child_dev_size != sizeof(*p_child)) {
+ /* different child dev size . Ignore it */
+ DRM_DEBUG("different child size is found. Invalid.\n");
+ return;
+ }
+ /* get the block size of general definitions */
+ block_ptr = (u16 *)((char *)p_defs - 2);
+ block_size = *block_ptr;
+ /* get the number of child device */
+ child_device_num = (block_size - sizeof(*p_defs)) /
+ sizeof(*p_child);
+ count = 0;
+ for (i = 0; i < child_device_num; i++) {
+ p_child = &(p_defs->devices[i]);
+ if (!p_child->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 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) {
+ /* skip the incorrect SDVO port */
+ DRM_DEBUG("Incorrect SDVO port. Skip it \n");
+ continue;
+ }
+ DRM_DEBUG("the SDVO device with slave addr %2x is found on "
+ "%s port\n",
+ p_child->slave_addr,
+ (p_child->dvo_port == DEVICE_PORT_DVOB) ?
+ "SDVOB" : "SDVOC");
+ p_mapping = &(dev_priv->sdvo_mappings[p_child->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->initialized = 1;
+ } else {
+ DRM_DEBUG("Maybe one SDVO port is shared by "
+ "two SDVO device.\n");
+ }
+ if (p_child->slave2_addr) {
+ /* Maybe this is a SDVO device with multiple inputs */
+ /* And the mapping info is not added */
+ DRM_DEBUG("there exists the slave2_addr. Maybe this "
+ "is a SDVO device with multiple inputs.\n");
+ }
+ count++;
+ }
+
+ if (!count) {
+ /* No SDVO device info is found */
+ DRM_DEBUG("No SDVO device info is found in VBT\n");
+ }
+ return;
+}
/**
* intel_init_bios - initialize VBIOS settings & find VBT
* @dev: DRM device
@@ -242,7 +326,7 @@ intel_init_bios(struct drm_device *dev)
parse_general_features(dev_priv, bdb);
parse_lfp_panel_data(dev_priv, bdb);
parse_sdvo_panel_data(dev_priv, bdb);
-
+ parse_sdvo_device_mapping(dev_priv, bdb);
pci_unmap_rom(pdev, bios);
return 0;
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