drm/amd/display: Add set backlight to hw sequencer.

[Why & How]
Add set backlight to hw sequencer, dmu communication will
be handled in hw sequencer for new asics.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -2509,35 +2509,21 @@ bool dc_link_set_backlight_level(const struct dc_link *link,
 		uint32_t frame_ramp)
 {
 	struct dc  *dc = link->ctx->dc;
-	struct abm *abm = get_abm_from_stream_res(link);
-	struct dmcu *dmcu = dc->res_pool->dmcu;
-	unsigned int controller_id = 0;
-	bool fw_set_brightness = true;
 	int i;
-	DC_LOGGER_INIT(link->ctx->logger);
-
-	if (abm == NULL || (abm->funcs->set_backlight_level_pwm == NULL))
-		return false;
-
-	if (dmcu)
-		fw_set_brightness = dmcu->funcs->is_dmcu_initialized(dmcu);
 
+	DC_LOGGER_INIT(link->ctx->logger);
 	DC_LOG_BACKLIGHT("New Backlight level: %d (0x%X)\n",
 			backlight_pwm_u16_16, backlight_pwm_u16_16);
 
 	if (dc_is_embedded_signal(link->connector_signal)) {
+		struct pipe_ctx *pipe_ctx = NULL;
+
 		for (i = 0; i < MAX_PIPES; i++) {
 			if (dc->current_state->res_ctx.pipe_ctx[i].stream) {
 				if (dc->current_state->res_ctx.
 						pipe_ctx[i].stream->link
 						== link) {
-					/* DMCU -1 for all controller id values,
-					 * therefore +1 here
-					 */
-					controller_id =
-						dc->current_state->
-						res_ctx.pipe_ctx[i].stream_res.tg->inst +
-						1;
+					pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];
 
 					/* Disable brightness ramping when the display is blanked
 					 * as it can hang the DMCU
@@ -2547,13 +2533,14 @@ bool dc_link_set_backlight_level(const struct dc_link *link,
 				}
 			}
 		}
-		abm->funcs->set_backlight_level_pwm(
-				abm,
+
+		if (pipe_ctx == NULL)
+			ASSERT(false);
+
+		dc->hwss.set_backlight_level(
+				pipe_ctx,
 				backlight_pwm_u16_16,
-				frame_ramp,
-				controller_id,
-				link->panel_cntl->inst,
-				fw_set_brightness);
+				frame_ramp);
 	}
 
 	return true;

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -2714,6 +2714,37 @@ void dce110_set_cursor_attribute(struct pipe_ctx *pipe_ctx)
 				pipe_ctx->plane_res.xfm, attributes);
 }
 
+bool dce110_set_backlight_level(struct pipe_ctx *pipe_ctx,
+		uint32_t backlight_pwm_u16_16,
+		uint32_t frame_ramp)
+{
+	struct dc_link *link = pipe_ctx->stream->link;
+	struct dc  *dc = link->ctx->dc;
+	struct abm *abm = pipe_ctx->stream_res.abm;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	bool fw_set_brightness = true;
+	/* DMCU -1 for all controller id values,
+	 * therefore +1 here
+	 */
+	uint32_t controller_id = pipe_ctx->stream_res.tg->inst + 1;
+
+	if (abm == NULL || (abm->funcs->set_backlight_level_pwm == NULL))
+		return false;
+
+	if (dmcu)
+		fw_set_brightness = dmcu->funcs->is_dmcu_initialized(dmcu);
+
+	abm->funcs->set_backlight_level_pwm(
+			abm,
+			backlight_pwm_u16_16,
+			frame_ramp,
+			controller_id,
+			link->panel_cntl->inst,
+			fw_set_brightness);
+
+	return true;
+}
+
 static const struct hw_sequencer_funcs dce110_funcs = {
 	.program_gamut_remap = program_gamut_remap,
 	.program_output_csc = program_output_csc,
@@ -2747,7 +2778,8 @@ static const struct hw_sequencer_funcs dce110_funcs = {
 	.edp_power_control = dce110_edp_power_control,
 	.edp_wait_for_hpd_ready = dce110_edp_wait_for_hpd_ready,
 	.set_cursor_position = dce110_set_cursor_position,
-	.set_cursor_attribute = dce110_set_cursor_attribute
+	.set_cursor_attribute = dce110_set_cursor_attribute,
+	.set_backlight_level = dce110_set_backlight_level,
 };
 
 static const struct hwseq_private_funcs dce110_private_funcs = {

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h

@@ -85,5 +85,9 @@ void dce110_edp_wait_for_hpd_ready(
 		struct dc_link *link,
 		bool power_up);
 
+bool dce110_set_backlight_level(struct pipe_ctx *pipe_ctx,
+		uint32_t backlight_pwm_u16_16,
+		uint32_t frame_ramp);
+
 #endif /* __DC_HWSS_DCE110_H__ */
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c

@@ -71,6 +71,7 @@ static const struct hw_sequencer_funcs dcn10_funcs = {
 	.set_clock = dcn10_set_clock,
 	.get_clock = dcn10_get_clock,
 	.get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync,
+	.set_backlight_level = dce110_set_backlight_level,
 };
 
 static const struct hwseq_private_funcs dcn10_private_funcs = {

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c

@@ -82,6 +82,7 @@ static const struct hw_sequencer_funcs dcn20_funcs = {
 	.init_vm_ctx = dcn20_init_vm_ctx,
 	.set_flip_control_gsl = dcn20_set_flip_control_gsl,
 	.get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync,
+	.set_backlight_level = dce110_set_backlight_level,
 };
 
 static const struct hwseq_private_funcs dcn20_private_funcs = {

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c

@@ -91,6 +91,7 @@ static const struct hw_sequencer_funcs dcn21_funcs = {
 	.optimize_pwr_state = dcn21_optimize_pwr_state,
 	.exit_optimized_pwr_state = dcn21_exit_optimized_pwr_state,
 	.power_down = dce110_power_down,
+	.set_backlight_level = dce110_set_backlight_level,
 };
 
 static const struct hwseq_private_funcs dcn21_private_funcs = {

drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h

@@ -191,6 +191,10 @@ struct hw_sequencer_funcs {
 			unsigned int bufSize, unsigned int mask);
 	void (*clear_status_bits)(struct dc *dc, unsigned int mask);
 
+	bool (*set_backlight_level)(struct pipe_ctx *pipe_ctx,
+			uint32_t backlight_pwm_u16_16,
+			uint32_t frame_ramp);
+
 
 };