1 files changed, 0 insertions, 108 deletions

diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
index 4fa1e3bb1b78..f634371c717a 100644
--- a/drivers/gpu/drm/drm_panel.c
+++ b/drivers/gpu/drm/drm_panel.c
@@ -26,20 +26,12 @@
 #include <linux/module.h>
 
 #include <drm/drm_crtc.h>
-#include <drm/drm_dp_helper.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 
 static DEFINE_MUTEX(panel_lock);
 static LIST_HEAD(panel_list);
 
-struct dp_aux_backlight {
-	struct backlight_device *base;
-	struct drm_dp_aux *aux;
-	struct drm_edp_backlight_info info;
-	bool enabled;
-};
-
 /**
  * DOC: drm panel
  *
@@ -350,106 +342,6 @@ int drm_panel_of_backlight(struct drm_panel *panel)
 	return 0;
 }
 EXPORT_SYMBOL(drm_panel_of_backlight);
-
-static int dp_aux_backlight_update_status(struct backlight_device *bd)
-{
-	struct dp_aux_backlight *bl = bl_get_data(bd);
-	u16 brightness = backlight_get_brightness(bd);
-	int ret = 0;
-
-	if (!backlight_is_blank(bd)) {
-		if (!bl->enabled) {
-			drm_edp_backlight_enable(bl->aux, &bl->info, brightness);
-			bl->enabled = true;
-			return 0;
-		}
-		ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness);
-	} else {
-		if (bl->enabled) {
-			drm_edp_backlight_disable(bl->aux, &bl->info);
-			bl->enabled = false;
-		}
-	}
-
-	return ret;
-}
-
-static const struct backlight_ops dp_aux_bl_ops = {
-	.update_status = dp_aux_backlight_update_status,
-};
-
-/**
- * drm_panel_dp_aux_backlight - create and use DP AUX backlight
- * @panel: DRM panel
- * @aux: The DP AUX channel to use
- *
- * Use this function to create and handle backlight if your panel
- * supports backlight control over DP AUX channel using DPCD
- * registers as per VESA's standard backlight control interface.
- *
- * When the panel is enabled backlight will be enabled after a
- * successful call to &drm_panel_funcs.enable()
- *
- * When the panel is disabled backlight will be disabled before the
- * call to &drm_panel_funcs.disable().
- *
- * A typical implementation for a panel driver supporting backlight
- * control over DP AUX will call this function at probe time.
- * Backlight will then be handled transparently without requiring
- * any intervention from the driver.
- *
- * drm_panel_dp_aux_backlight() must be called after the call to drm_panel_init().
- *
- * Return: 0 on success or a negative error code on failure.
- */
-int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux)
-{
-	struct dp_aux_backlight *bl;
-	struct backlight_properties props = { 0 };
-	u16 current_level;
-	u8 current_mode;
-	u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE];
-	int ret;
-
-	if (!panel || !panel->dev || !aux)
-		return -EINVAL;
-
-	ret = drm_dp_dpcd_read(aux, DP_EDP_DPCD_REV, edp_dpcd,
-			       EDP_DISPLAY_CTL_CAP_SIZE);
-	if (ret < 0)
-		return ret;
-
-	if (!drm_edp_backlight_supported(edp_dpcd)) {
-		DRM_DEV_INFO(panel->dev, "DP AUX backlight is not supported\n");
-		return 0;
-	}
-
-	bl = devm_kzalloc(panel->dev, sizeof(*bl), GFP_KERNEL);
-	if (!bl)
-		return -ENOMEM;
-
-	bl->aux = aux;
-
-	ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd,
-				     &current_level, &current_mode);
-	if (ret < 0)
-		return ret;
-
-	props.type = BACKLIGHT_RAW;
-	props.brightness = current_level;
-	props.max_brightness = bl->info.max;
-
-	bl->base = devm_backlight_device_register(panel->dev, "dp_aux_backlight",
-						  panel->dev, bl,
-						  &dp_aux_bl_ops, &props);
-	if (IS_ERR(bl->base))
-		return PTR_ERR(bl->base);
-
-	panel->backlight = bl->base;
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_panel_dp_aux_backlight);
 #endif
 
 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");