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drm/i915: parse child device from VBT
On some laptops there is no HDMI/DP. But the xrandr still reports several disconnected HDMI/display ports. In such case the user will be confused. >DVI1 disconnected (normal left inverted right x axis y axis) >DP1 disconnected (normal left inverted right x axis y axis) >DVI2 disconnected (normal left inverted right x axis y axis) >DP2 disconnected (normal left inverted right x axis y axis) >DP3 disconnected (normal left inverted right x axis y axis) This patch set is to use the child device parsed in VBT to decide whether the HDMI/DP/LVDS/TV should be initialized. Parse the child device from VBT. The device class type is also added for LFP, TV, HDMI, DP output. https://bugs.freedesktop.org/show_bug.cgi?id=22785 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Eric Anholt <eric@anholt.net>
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@ -1526,6 +1526,15 @@ int i915_driver_unload(struct drm_device *dev)
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}
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if (drm_core_check_feature(dev, DRIVER_MODESET)) {
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/*
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* free the memory space allocated for the child device
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* config parsed from VBT
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*/
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if (dev_priv->child_dev && dev_priv->child_dev_num) {
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kfree(dev_priv->child_dev);
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dev_priv->child_dev = NULL;
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dev_priv->child_dev_num = 0;
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}
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drm_irq_uninstall(dev);
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vga_client_register(dev->pdev, NULL, NULL, NULL);
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}
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@ -545,6 +545,8 @@ typedef struct drm_i915_private {
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struct timer_list idle_timer;
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bool busy;
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u16 orig_clock;
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int child_dev_num;
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struct child_device_config *child_dev;
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} drm_i915_private_t;
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/** driver private structure attached to each drm_gem_object */
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@ -404,6 +404,70 @@ parse_driver_features(struct drm_i915_private *dev_priv,
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dev_priv->render_reclock_avail = true;
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}
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static void
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parse_device_mapping(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct bdb_general_definitions *p_defs;
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struct child_device_config *p_child, *child_dev_ptr;
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int i, child_device_num, count;
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u16 block_size;
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p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
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if (!p_defs) {
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DRM_DEBUG_KMS("No general definition block is found\n");
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return;
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}
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/* judge whether the size of child device meets the requirements.
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* If the child device size obtained from general definition block
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* is different with sizeof(struct child_device_config), skip the
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* parsing of sdvo device info
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*/
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if (p_defs->child_dev_size != sizeof(*p_child)) {
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/* different child dev size . Ignore it */
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DRM_DEBUG_KMS("different child size is found. Invalid.\n");
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return;
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}
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/* get the block size of general definitions */
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block_size = get_blocksize(p_defs);
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/* get the number of child device */
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child_device_num = (block_size - sizeof(*p_defs)) /
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sizeof(*p_child);
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count = 0;
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/* get the number of child device that is present */
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for (i = 0; i < child_device_num; i++) {
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p_child = &(p_defs->devices[i]);
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if (!p_child->device_type) {
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/* skip the device block if device type is invalid */
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continue;
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}
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count++;
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}
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if (!count) {
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DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
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return;
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}
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dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL);
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if (!dev_priv->child_dev) {
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DRM_DEBUG_KMS("No memory space for child device\n");
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return;
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}
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dev_priv->child_dev_num = count;
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count = 0;
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for (i = 0; i < child_device_num; i++) {
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p_child = &(p_defs->devices[i]);
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if (!p_child->device_type) {
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/* skip the device block if device type is invalid */
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continue;
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}
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child_dev_ptr = dev_priv->child_dev + count;
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count++;
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memcpy((void *)child_dev_ptr, (void *)p_child,
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sizeof(*p_child));
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}
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return;
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}
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/**
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* intel_init_bios - initialize VBIOS settings & find VBT
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* @dev: DRM device
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@ -455,6 +519,7 @@ intel_init_bios(struct drm_device *dev)
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parse_lfp_panel_data(dev_priv, bdb);
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parse_sdvo_panel_data(dev_priv, bdb);
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parse_sdvo_device_mapping(dev_priv, bdb);
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parse_device_mapping(dev_priv, bdb);
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parse_driver_features(dev_priv, bdb);
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pci_unmap_rom(pdev, bios);
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@ -549,4 +549,21 @@ bool intel_init_bios(struct drm_device *dev);
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#define SWF14_APM_STANDBY 0x1
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#define SWF14_APM_RESTORE 0x0
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/* Add the device class for LFP, TV, HDMI */
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#define DEVICE_TYPE_INT_LFP 0x1022
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#define DEVICE_TYPE_INT_TV 0x1009
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#define DEVICE_TYPE_HDMI 0x60D2
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#define DEVICE_TYPE_DP 0x68C6
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#define DEVICE_TYPE_eDP 0x78C6
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/* define the DVO port for HDMI output type */
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#define DVO_B 1
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#define DVO_C 2
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#define DVO_D 3
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/* define the PORT for DP output type */
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#define PORT_IDPB 7
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#define PORT_IDPC 8
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#define PORT_IDPD 9
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#endif /* _I830_BIOS_H_ */
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