[PATCH 4.9 134/145] drm/i915: hide unused intel_panel_set_backlight function

From: Greg Kroah-Hartman
Date: Fri Feb 23 2018 - 14:44:38 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@xxxxxxxx>

commit fd94d53e55bd487368dfee9f1af24da78b2bb582 upstream.

Building i915 without backlight support results in a harmless warning
for intel_panel_set_backlight:

drivers/gpu/drm/i915/intel_panel.c:653:13: error: 'intel_panel_set_backlight' defined but not used [-Werror=unused-function]

This moves it into the CONFIG_BACKLIGHT_CLASS_DEVICE section that
its caller is in.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20171127151239.1813673-2-arnd@xxxxxxxx
[arnd: manually rebased to 4.9]
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_panel.c | 86 ++++++++++++++++++-------------------
1 file changed, 43 insertions(+), 43 deletions(-)

--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -544,25 +544,6 @@ static u32 pwm_get_backlight(struct inte
return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS);
}

-static u32 intel_panel_get_backlight(struct intel_connector *connector)
-{
- struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
- struct intel_panel *panel = &connector->panel;
- u32 val = 0;
-
- mutex_lock(&dev_priv->backlight_lock);
-
- if (panel->backlight.enabled) {
- val = panel->backlight.get(connector);
- val = intel_panel_compute_brightness(connector, val);
- }
-
- mutex_unlock(&dev_priv->backlight_lock);
-
- DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
- return val;
-}
-
static void lpt_set_backlight(struct intel_connector *connector, u32 level)
{
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
@@ -646,30 +627,6 @@ intel_panel_actually_set_backlight(struc
panel->backlight.set(connector, level);
}

-/* set backlight brightness to level in range [0..max], scaling wrt hw min */
-static void intel_panel_set_backlight(struct intel_connector *connector,
- u32 user_level, u32 user_max)
-{
- struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
- struct intel_panel *panel = &connector->panel;
- u32 hw_level;
-
- if (!panel->backlight.present)
- return;
-
- mutex_lock(&dev_priv->backlight_lock);
-
- WARN_ON(panel->backlight.max == 0);
-
- hw_level = scale_user_to_hw(connector, user_level, user_max);
- panel->backlight.level = hw_level;
-
- if (panel->backlight.enabled)
- intel_panel_actually_set_backlight(connector, hw_level);
-
- mutex_unlock(&dev_priv->backlight_lock);
-}
-
/* set backlight brightness to level in range [0..max], assuming hw min is
* respected.
*/
@@ -1122,6 +1079,49 @@ void intel_panel_enable_backlight(struct
}

#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
+static u32 intel_panel_get_backlight(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct intel_panel *panel = &connector->panel;
+ u32 val = 0;
+
+ mutex_lock(&dev_priv->backlight_lock);
+
+ if (panel->backlight.enabled) {
+ val = panel->backlight.get(connector);
+ val = intel_panel_compute_brightness(connector, val);
+ }
+
+ mutex_unlock(&dev_priv->backlight_lock);
+
+ DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
+ return val;
+}
+
+/* set backlight brightness to level in range [0..max], scaling wrt hw min */
+static void intel_panel_set_backlight(struct intel_connector *connector,
+ u32 user_level, u32 user_max)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct intel_panel *panel = &connector->panel;
+ u32 hw_level;
+
+ if (!panel->backlight.present)
+ return;
+
+ mutex_lock(&dev_priv->backlight_lock);
+
+ WARN_ON(panel->backlight.max == 0);
+
+ hw_level = scale_user_to_hw(connector, user_level, user_max);
+ panel->backlight.level = hw_level;
+
+ if (panel->backlight.enabled)
+ intel_panel_actually_set_backlight(connector, hw_level);
+
+ mutex_unlock(&dev_priv->backlight_lock);
+}
+
static int intel_backlight_device_update_status(struct backlight_device *bd)
{
struct intel_connector *connector = bl_get_data(bd);