drm/amd: Drop abm_level property

This vendor specific property has never been used by userspace
software and conflicts with the panel_power_savings sysfs file.
That is a compositor and user could fight over the same data.

Fixes: 63d0b87 ("drm/amd/display: add panel_power_savings sysfs entry to eDP connectors")
Suggested-by: Harry Wentland <Harry.Wentland@amd.com>
Cc: Hamza Mahfooz <Hamza.Mahfooz@amd.com>
Cc: "Sun peng Li (Leo)" <Sunpeng.Li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

@@ -1350,14 +1350,6 @@ int amdgpu_display_modeset_create_props(struct amdgpu_device *adev)
 					 "dither",
 					 amdgpu_dither_enum_list, sz);
 
-	if (adev->dc_enabled) {
-		adev->mode_info.abm_level_property =
-			drm_property_create_range(adev_to_drm(adev), 0,
-						  "abm level", 0, 4);
-		if (!adev->mode_info.abm_level_property)
-			return -ENOMEM;
-	}
-
 	return 0;
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h

@@ -324,8 +324,6 @@ struct amdgpu_mode_info {
 	struct drm_property *audio_property;
 	/* FMT dithering */
 	struct drm_property *dither_property;
-	/* Adaptive Backlight Modulation (power feature) */
-	struct drm_property *abm_level_property;
 	/* hardcoded DFP edid from BIOS */
 	struct edid *bios_hardcoded_edid;
 	int bios_hardcoded_edid_size;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -6393,9 +6393,6 @@ int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
 	} else if (property == adev->mode_info.underscan_property) {
 		dm_new_state->underscan_enable = val;
 		ret = 0;
-	} else if (property == adev->mode_info.abm_level_property) {
-		dm_new_state->abm_level = val ?: ABM_LEVEL_IMMEDIATE_DISABLE;
-		ret = 0;
 	}
 
 	return ret;
@@ -6438,10 +6435,6 @@ int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
 	} else if (property == adev->mode_info.underscan_property) {
 		*val = dm_state->underscan_enable;
 		ret = 0;
-	} else if (property == adev->mode_info.abm_level_property) {
-		*val = (dm_state->abm_level != ABM_LEVEL_IMMEDIATE_DISABLE) ?
-			dm_state->abm_level : 0;
-		ret = 0;
 	}
 
 	return ret;
@@ -7668,13 +7661,6 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 	aconnector->base.state->max_bpc = 16;
 	aconnector->base.state->max_requested_bpc = aconnector->base.state->max_bpc;
 
-	if (connector_type == DRM_MODE_CONNECTOR_eDP &&
-	    (dc_is_dmcu_initialized(adev->dm.dc) ||
-	     adev->dm.dc->ctx->dmub_srv) && amdgpu_dm_abm_level < 0) {
-		drm_object_attach_property(&aconnector->base.base,
-				adev->mode_info.abm_level_property, 0);
-	}
-
 	if (connector_type == DRM_MODE_CONNECTOR_HDMIA) {
 		/* Content Type is currently only implemented for HDMI. */
 		drm_connector_attach_content_type_property(&aconnector->base);