drm/panel: panel-samsung-s6e3ha2: Use backlight power constants

Replace FB_BLANK_ constants with their counterparts from the
backlight subsystem. The values are identical, so there's no
change in functionality or semantics.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240731122311.1143153-7-tzimmermann@suse.de

drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c

@@ -458,7 +458,7 @@ static int s6e3ha2_set_brightness(struct backlight_device *bl_dev)
 		return -EINVAL;
 	}
 
-	if (bl_dev->props.power > FB_BLANK_NORMAL)
+	if (bl_dev->props.power > BACKLIGHT_POWER_REDUCED)
 		return -EPERM;
 
 	s6e3ha2_call_write_func(ret, s6e3ha2_test_key_on_f0(ctx));
@@ -508,7 +508,7 @@ static int s6e3ha2_disable(struct drm_panel *panel)
 	s6e3ha2_call_write_func(ret, mipi_dsi_dcs_set_display_off(dsi));
 
 	msleep(40);
-	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_REDUCED;
 
 	return 0;
 }
@@ -554,7 +554,7 @@ static int s6e3ha2_prepare(struct drm_panel *panel)
 	if (ret < 0)
 		goto err;
 
-	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_REDUCED;
 
 	return 0;
 
@@ -601,7 +601,7 @@ static int s6e3ha2_enable(struct drm_panel *panel)
 	s6e3ha2_call_write_func(ret, s6e3ha2_test_key_off_f0(ctx));
 
 	s6e3ha2_call_write_func(ret, mipi_dsi_dcs_set_display_on(dsi));
-	ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_ON;
 
 	return 0;
 }
@@ -729,7 +729,7 @@ static int s6e3ha2_probe(struct mipi_dsi_device *dsi)
 
 	ctx->bl_dev->props.max_brightness = S6E3HA2_MAX_BRIGHTNESS;
 	ctx->bl_dev->props.brightness = S6E3HA2_DEFAULT_BRIGHTNESS;
-	ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_OFF;
 
 	drm_panel_init(&ctx->panel, dev, &s6e3ha2_drm_funcs,
 		       DRM_MODE_CONNECTOR_DSI);