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drm/amd/display: Only register backlight device if embedded panel connected 

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2018-03-12 11:16:47 -04:00 committed by Alex Deucher
parent c3d7bad88e
commit 89fc8d4e95
1 changed files with 33 additions and 25 deletions
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58
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -1403,6 +1403,28 @@ static int initialize_plane(struct amdgpu_display_manager *dm,
return ret;
}
static void register_backlight_device(struct amdgpu_display_manager *dm,
struct dc_link *link)
{
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
if ((link->connector_signal & (SIGNAL_TYPE_EDP | SIGNAL_TYPE_LVDS)) &&
link->type != dc_connection_none) {
/* Event if registration failed, we should continue with
* DM initialization because not having a backlight control
* is better then a black screen.
*/
amdgpu_dm_register_backlight_device(dm);
if (dm->backlight_dev)
dm->backlight_link = link;
}
#endif
}
/* In this architecture, the association
* connector -> encoder -> crtc
* id not really requried. The crtc and connector will hold the
@ -1456,6 +1478,7 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
/* loops over all connectors on the board */
for (i = 0; i < link_cnt; i++) {
struct dc_link *link = NULL;
if (i > AMDGPU_DM_MAX_DISPLAY_INDEX) {
DRM_ERROR(
@ -1482,9 +1505,14 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
goto fail;
}
if (dc_link_detect(dc_get_link_at_index(dm->dc, i),
DETECT_REASON_BOOT))
link = dc_get_link_at_index(dm->dc, i);
if (dc_link_detect(link, DETECT_REASON_BOOT)) {
amdgpu_dm_update_connector_after_detect(aconnector);
register_backlight_device(dm, link);
}
}
/* Software is initialized. Now we can register interrupt handlers. */
@ -2685,7 +2713,8 @@ static void amdgpu_dm_connector_destroy(struct drm_connector *connector)
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
if (link->connector_signal & (SIGNAL_TYPE_EDP | SIGNAL_TYPE_LVDS)) {
if ((link->connector_signal & (SIGNAL_TYPE_EDP | SIGNAL_TYPE_LVDS)) &&
link->type != dc_connection_none) {
amdgpu_dm_register_backlight_device(dm);
if (dm->backlight_dev) {
@ -3561,6 +3590,7 @@ create_i2c(struct ddc_service *ddc_service,
return i2c;
}
/* Note: this function assumes that dc_link_detect() was called for the
* dc_link which will be represented by this aconnector.
*/
@ -3630,28 +3660,6 @@ static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
|| connector_type == DRM_MODE_CONNECTOR_eDP)
amdgpu_dm_initialize_dp_connector(dm, aconnector);
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
/* NOTE: this currently will create backlight device even if a panel
* is not connected to the eDP/LVDS connector.
*
* This is less than ideal but we don't have sink information at this
* stage since detection happens after. We can't do detection earlier
* since MST detection needs connectors to be created first.
*/
if (link->connector_signal & (SIGNAL_TYPE_EDP | SIGNAL_TYPE_LVDS)) {
/* Event if registration failed, we should continue with
* DM initialization because not having a backlight control
* is better then a black screen.
*/
amdgpu_dm_register_backlight_device(dm);
if (dm->backlight_dev)
dm->backlight_link = link;
}
#endif
out_free:
if (res) {
kfree(i2c);