3129 int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl,  in drm_edp_backlight_set_level()  argument
3135 	if (bl->lsb_reg_used) {  in drm_edp_backlight_set_level()
3155 drm_edp_backlight_set_enable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl,  in drm_edp_backlight_set_enable()  argument
3162 	if (!bl->aux_enable)  in drm_edp_backlight_set_enable()
3204 int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl,  in drm_edp_backlight_enable()  argument
3210 	if (bl->pwmgen_bit_count) {  in drm_edp_backlight_enable()
3211 		ret = drm_dp_dpcd_writeb(aux, DP_EDP_PWMGEN_BIT_COUNT, bl->pwmgen_bit_count);  in drm_edp_backlight_enable()
3217 	if (bl->pwm_freq_pre_divider) {  in drm_edp_backlight_enable()
3218 		ret = drm_dp_dpcd_writeb(aux, DP_EDP_BACKLIGHT_FREQ_SET, bl->pwm_freq_pre_divider);  in drm_edp_backlight_enable()
3234 	ret = drm_edp_backlight_set_level(aux, bl, level);  in drm_edp_backlight_enable()
3237 	ret = drm_edp_backlight_set_enable(aux, bl, true);  in drm_edp_backlight_enable()
3259 int drm_edp_backlight_disable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl)  in drm_edp_backlight_disable()  argument
3263 	ret = drm_edp_backlight_set_enable(aux, bl, false);  in drm_edp_backlight_disable()
3272 drm_edp_backlight_probe_max(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl,  in drm_edp_backlight_probe_max()  argument
3287 	bl->max = (1 << pn) - 1;  in drm_edp_backlight_probe_max()
3351 	bl->pwmgen_bit_count = pn;  in drm_edp_backlight_probe_max()
3352 	bl->max = (1 << pn) - 1;  in drm_edp_backlight_probe_max()
3355 		bl->pwm_freq_pre_divider = f;  in drm_edp_backlight_probe_max()
3364 drm_edp_backlight_probe_level(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl,  in drm_edp_backlight_probe_level()  argument
3380 		int size = 1 + bl->lsb_reg_used;  in drm_edp_backlight_probe_level()
3389 		if (bl->lsb_reg_used)  in drm_edp_backlight_probe_level()
3399 	return bl->max;  in drm_edp_backlight_probe_level()
3421 drm_edp_backlight_init(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl,  in drm_edp_backlight_init()  argument
3428 		bl->aux_enable = true;  in drm_edp_backlight_init()
3430 		bl->lsb_reg_used = true;  in drm_edp_backlight_init()
3432 	ret = drm_edp_backlight_probe_max(aux, bl, driver_pwm_freq_hz, edp_dpcd);  in drm_edp_backlight_init()
3436 	ret = drm_edp_backlight_probe_level(aux, bl, current_mode);  in drm_edp_backlight_init()
3443 		    aux->name, *current_level, bl->max, bl->pwm_freq_pre_divider, *current_mode);  in drm_edp_backlight_init()
3446 		    aux->name, bl->pwmgen_bit_count, bl->lsb_reg_used, bl->aux_enable);  in drm_edp_backlight_init()
3456 	struct dp_aux_backlight *bl = bl_get_data(bd);  in dp_aux_backlight_update_status()  local
3461 		if (!bl->enabled) {  in dp_aux_backlight_update_status()
3462 			drm_edp_backlight_enable(bl->aux, &bl->info, brightness);  in dp_aux_backlight_update_status()
3463 			bl->enabled = true;  in dp_aux_backlight_update_status()
3466 		ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness);  in dp_aux_backlight_update_status()
3468 		if (bl->enabled) {  in dp_aux_backlight_update_status()
3469 			drm_edp_backlight_disable(bl->aux, &bl->info);  in dp_aux_backlight_update_status()
3470 			bl->enabled = false;  in dp_aux_backlight_update_status()
3507 	struct dp_aux_backlight *bl;  in drm_panel_dp_aux_backlight()  local
3527 	bl = devm_kzalloc(panel->dev, sizeof(*bl), GFP_KERNEL);  in drm_panel_dp_aux_backlight()
3528 	if (!bl)  in drm_panel_dp_aux_backlight()
3531 	bl->aux = aux;  in drm_panel_dp_aux_backlight()
3533 	ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd,  in drm_panel_dp_aux_backlight()
3540 	props.max_brightness = bl->info.max;  in drm_panel_dp_aux_backlight()
3542 	bl->base = devm_backlight_device_register(panel->dev, "dp_aux_backlight",  in drm_panel_dp_aux_backlight()
3543 						  panel->dev, bl,  in drm_panel_dp_aux_backlight()
3545 	if (IS_ERR(bl->base))  in drm_panel_dp_aux_backlight()
3546 		return PTR_ERR(bl->base);  in drm_panel_dp_aux_backlight()
3548 	backlight_disable(bl->base);  in drm_panel_dp_aux_backlight()
3550 	panel->backlight = bl->base;  in drm_panel_dp_aux_backlight()