6 files changed, 52 insertions, 5 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 686a26de50f9..aa121e30d715 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -631,6 +631,11 @@ int amdgpu_display_modeset_create_props(struct amdgpu_device *adev)
 			drm_property_create_range(adev->ddev, 0, "max bpc", 8, 16);
 		if (!adev->mode_info.max_bpc_property)
 			return -ENOMEM;
+		adev->mode_info.abm_level_property =
+			drm_property_create_range(adev->ddev, 0,
+						"abm level", 0, 4);
+		if (!adev->mode_info.abm_level_property)
+			return -ENOMEM;
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 0dc2c5c57015..ef5664b403a9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -340,6 +340,8 @@ struct amdgpu_mode_info {
 	struct drm_property *dither_property;
 	/* maximum number of bits per channel for monitor color */
 	struct drm_property *max_bpc_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;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 1701225edc50..1ed079a6ca81 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2948,6 +2948,7 @@ dm_crtc_duplicate_state(struct drm_crtc *crtc)
 	state->adjust = cur->adjust;
 	state->vrr_infopacket = cur->vrr_infopacket;
 	state->freesync_enabled = cur->freesync_enabled;
+	state->abm_level = cur->abm_level;
 
 	/* TODO Duplicate dc_stream after objects are stream object is flattened */
 
@@ -3065,6 +3066,9 @@ int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
 	} else if (property == adev->mode_info.max_bpc_property) {
 		dm_new_state->max_bpc = val;
 		ret = 0;
+	} else if (property == adev->mode_info.abm_level_property) {
+		dm_new_state->abm_level = val;
+		ret = 0;
 	}
 
 	return ret;
@@ -3110,7 +3114,11 @@ int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
 	} else if (property == adev->mode_info.max_bpc_property) {
 		*val = dm_state->max_bpc;
 		ret = 0;
+	} else if (property == adev->mode_info.abm_level_property) {
+		*val = dm_state->abm_level;
+		ret = 0;
 	}
+
 	return ret;
 }
 
@@ -3175,6 +3183,7 @@ amdgpu_dm_connector_atomic_duplicate_state(struct drm_connector *connector)
 
 	new_state->freesync_capable = state->freesync_capable;
 	new_state->freesync_enable = state->freesync_enable;
+	new_state->abm_level = state->abm_level;
 
 	return &new_state->base;
 }
@@ -3924,6 +3933,11 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 				adev->mode_info.max_bpc_property,
 				0);
 
+	if (connector_type == DRM_MODE_CONNECTOR_eDP &&
+	    dc_is_dmcu_initialized(adev->dm.dc)) {
+		drm_object_attach_property(&aconnector->base.base,
+				adev->mode_info.abm_level_property, 0);
+	}
 }
 
 static int amdgpu_dm_i2c_xfer(struct i2c_adapter *i2c_adap,
@@ -4430,6 +4444,7 @@ static bool commit_planes_to_stream(
 	struct dc_stream_state *dc_stream = dm_new_crtc_state->stream;
 	struct dc_stream_update *stream_update =
 			kzalloc(sizeof(struct dc_stream_update), GFP_KERNEL);
+	unsigned int abm_level;
 
 	if (!stream_update) {
 		BREAK_TO_DEBUGGER();
@@ -4462,6 +4477,11 @@ static bool commit_planes_to_stream(
 		stream_update->adjust = &dc_stream->adjust;
 	}
 
+	if (dm_new_crtc_state->abm_level != dm_old_crtc_state->abm_level) {
+		abm_level = dm_new_crtc_state->abm_level;
+		stream_update->abm_level = &abm_level;
+	}
+
 	for (i = 0; i < new_plane_count; i++) {
 		updates[i].surface = plane_states[i];
 		updates[i].gamma =
@@ -4599,6 +4619,7 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
 
 		dc_stream_attach->adjust = acrtc_state->adjust;
 		dc_stream_attach->vrr_infopacket = acrtc_state->vrr_infopacket;
+		dc_stream_attach->abm_level = acrtc_state->abm_level;
 
 		if (false == commit_planes_to_stream(dm->dc,
 							plane_states_constructed,
@@ -4779,7 +4800,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 		}
 	}
 
-	/* Handle scaling and underscan changes*/
+	/* Handle scaling, underscan, and abm changes*/
 	for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {
 		struct dm_connector_state *dm_new_con_state = to_dm_connector_state(new_con_state);
 		struct dm_connector_state *dm_old_con_state = to_dm_connector_state(old_con_state);
@@ -4795,11 +4816,14 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 		if (!acrtc || drm_atomic_crtc_needs_modeset(new_crtc_state))
 			continue;
 
-		/* Skip anything that is not scaling or underscan changes */
-		if (!is_scaling_state_different(dm_new_con_state, dm_old_con_state))
-			continue;
 
 		dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
+		dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);
+
+		/* Skip anything that is not scaling or underscan changes */
+		if (!is_scaling_state_different(dm_new_con_state, dm_old_con_state) &&
+				(dm_new_crtc_state->abm_level == dm_old_crtc_state->abm_level))
+			continue;
 
 		update_stream_scaling_settings(&dm_new_con_state->base.crtc->mode,
 				dm_new_con_state, (struct dc_stream_state *)dm_new_crtc_state->stream);
@@ -4813,6 +4837,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 
 		dm_new_crtc_state->stream->adjust = dm_new_crtc_state->adjust;
 		dm_new_crtc_state->stream->vrr_infopacket = dm_new_crtc_state->vrr_infopacket;
+		dm_new_crtc_state->stream->abm_level = dm_new_crtc_state->abm_level;
 
 		/*TODO How it works with MPO ?*/
 		if (!commit_planes_to_stream(
@@ -5151,6 +5176,8 @@ static int dm_update_crtcs_state(struct amdgpu_display_manager *dm,
 			set_freesync_on_stream(dm, dm_new_crtc_state,
 					       dm_new_conn_state, new_stream);
 
+			dm_new_crtc_state->abm_level = dm_new_conn_state->abm_level;
+
 			if (dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) &&
 			    dc_is_stream_scaling_unchanged(new_stream, dm_old_crtc_state->stream)) {
 				new_crtc_state->mode_changed = false;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 607c3cdd7d0c..0512a9810913 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -234,6 +234,8 @@ struct dm_crtc_state {
 	bool freesync_enabled;
 	struct dc_crtc_timing_adjust adjust;
 	struct dc_info_packet vrr_infopacket;
+
+	int abm_level;
 };
 
 #define to_dm_crtc_state(x) container_of(x, struct dm_crtc_state, base)
@@ -256,6 +258,7 @@ struct dm_connector_state {
 	bool underscan_enable;
 	bool freesync_enable;
 	bool freesync_capable;
+	uint8_t abm_level;
 };
 
 #define to_dm_connector_state(x)\
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 1d8bd554869b..dba6b57830c7 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1686,6 +1686,15 @@ void dc_resume(struct dc *dc)
 		core_link_resume(dc->links[i]);
 }
 
+bool dc_is_dmcu_initialized(struct dc *dc)
+{
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+
+	if (dmcu)
+		return dmcu->funcs->is_dmcu_initialized(dmcu);
+	return false;
+}
+
 bool dc_submit_i2c(
 		struct dc *dc,
 		uint32_t link_index,
@@ -1810,4 +1819,4 @@ void get_clock_requirements_for_state(struct dc_state *state, struct AsicStateEx
 	info->dcfClockDeepSleep			= (unsigned int)state->bw.dcn.clk.dcfclk_deep_sleep_khz;
 	info->fClock					= (unsigned int)state->bw.dcn.clk.fclk_khz;
 	info->phyClock					= (unsigned int)state->bw.dcn.clk.phyclk_khz;
-}
\ No newline at end of file
+}
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 6b0988310138..dea8bc39c688 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -742,5 +742,6 @@ void dc_set_power_state(
 		struct dc *dc,
 		enum dc_acpi_cm_power_state power_state);
 void dc_resume(struct dc *dc);
+bool dc_is_dmcu_initialized(struct dc *dc);
 
 #endif /* DC_INTERFACE_H_ */