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drm/i915: parse child device from VBT

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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>
This commit is contained in:
Zhao Yakui 2009-11-24 09:48:44 +08:00 committed by Eric Anholt
parent c1b5dea097
commit 6363ee6f49
4 changed files with 93 additions and 0 deletions
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9
drivers/gpu/drm/i915/i915_dma.c
View file

@ -1526,6 +1526,15 @@ int i915_driver_unload(struct drm_device *dev)
}
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
/*
* free the memory space allocated for the child device
* config parsed from VBT
*/
if (dev_priv->child_dev && dev_priv->child_dev_num) {
kfree(dev_priv->child_dev);
dev_priv->child_dev = NULL;
dev_priv->child_dev_num = 0;
}
drm_irq_uninstall(dev);
vga_client_register(dev->pdev, NULL, NULL, NULL);
}

2
drivers/gpu/drm/i915/i915_drv.h
View file

@ -545,6 +545,8 @@ typedef struct drm_i915_private {
struct timer_list idle_timer;
bool busy;
u16 orig_clock;
int child_dev_num;
struct child_device_config *child_dev;
} drm_i915_private_t;
/** driver private structure attached to each drm_gem_object */

65
drivers/gpu/drm/i915/intel_bios.c
View file

@ -404,6 +404,70 @@ parse_driver_features(struct drm_i915_private *dev_priv,
dev_priv->render_reclock_avail = true;
}
static void
parse_device_mapping(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct bdb_general_definitions *p_defs;
struct child_device_config *p_child, *child_dev_ptr;
int i, child_device_num, count;
u16 block_size;
p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
if (!p_defs) {
DRM_DEBUG_KMS("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_KMS("different child size is found. Invalid.\n");
return;
}
/* get the block size of general definitions */
block_size = get_blocksize(p_defs);
/* get the number of child device */
child_device_num = (block_size - sizeof(*p_defs)) /
sizeof(*p_child);
count = 0;
/* 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) {
/* skip the device block if device type is invalid */
continue;
}
count++;
}
if (!count) {
DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
return;
}
dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL);
if (!dev_priv->child_dev) {
DRM_DEBUG_KMS("No memory space for child device\n");
return;
}
dev_priv->child_dev_num = count;
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;
}
child_dev_ptr = dev_priv->child_dev + count;
count++;
memcpy((void *)child_dev_ptr, (void *)p_child,
sizeof(*p_child));
}
return;
}
/**
* intel_init_bios - initialize VBIOS settings & find VBT
* @dev: DRM device
@ -455,6 +519,7 @@ intel_init_bios(struct drm_device *dev)
parse_lfp_panel_data(dev_priv, bdb);
parse_sdvo_panel_data(dev_priv, bdb);
parse_sdvo_device_mapping(dev_priv, bdb);
parse_device_mapping(dev_priv, bdb);
parse_driver_features(dev_priv, bdb);
pci_unmap_rom(pdev, bios);

17
drivers/gpu/drm/i915/intel_bios.h
View file

@ -549,4 +549,21 @@ bool intel_init_bios(struct drm_device *dev);
#define SWF14_APM_STANDBY 0x1
#define SWF14_APM_RESTORE 0x0
/* Add the device class for LFP, TV, HDMI */
#define DEVICE_TYPE_INT_LFP 0x1022
#define DEVICE_TYPE_INT_TV 0x1009
#define DEVICE_TYPE_HDMI 0x60D2
#define DEVICE_TYPE_DP 0x68C6
#define DEVICE_TYPE_eDP 0x78C6
/* define the DVO port for HDMI output type */
#define DVO_B 1
#define DVO_C 2
#define DVO_D 3
/* define the PORT for DP output type */
#define PORT_IDPB 7
#define PORT_IDPC 8
#define PORT_IDPD 9
#endif /* _I830_BIOS_H_ */