drm/i915: move backlight to display.backlight

Move display backlight related members under drm_i915_private display
sub-struct.

Prefer adding anonymous sub-structs even for single members that aren't
our own structs.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/026241565dad12e0024c443419fa5e0caac41b2d.1661779055.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_backlight.c

@@ -305,7 +305,7 @@ void intel_backlight_set_acpi(const struct drm_connector_state *conn_state,
 	if (!panel->backlight.present || !conn_state->crtc)
 		return;
 
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 
 	drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0);
 
@@ -321,7 +321,7 @@ void intel_backlight_set_acpi(const struct drm_connector_state *conn_state,
 	if (panel->backlight.enabled)
 		intel_panel_actually_set_backlight(conn_state, hw_level);
 
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 }
 
 static void lpt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level)
@@ -465,14 +465,14 @@ void intel_backlight_disable(const struct drm_connector_state *old_conn_state)
 		return;
 	}
 
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 
 	if (panel->backlight.device)
 		panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
 	panel->backlight.enabled = false;
 	panel->backlight.funcs->disable(old_conn_state, 0);
 
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 }
 
 static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state,
@@ -815,11 +815,11 @@ void intel_backlight_enable(const struct intel_crtc_state *crtc_state,
 
 	drm_dbg_kms(&dev_priv->drm, "pipe %c\n", pipe_name(pipe));
 
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 
 	__intel_backlight_enable(crtc_state, conn_state);
 
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 }
 
 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
@@ -829,12 +829,12 @@ static u32 intel_panel_get_backlight(struct intel_connector *connector)
 	struct intel_panel *panel = &connector->panel;
 	u32 val = 0;
 
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 
 	if (panel->backlight.enabled)
 		val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector));
 
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 
 	drm_dbg_kms(&dev_priv->drm, "get backlight PWM = %d\n", val);
 	return val;
@@ -862,7 +862,7 @@ static void intel_panel_set_backlight(const struct drm_connector_state *conn_sta
 	if (!panel->backlight.present)
 		return;
 
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 
 	drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0);
 
@@ -872,7 +872,7 @@ static void intel_panel_set_backlight(const struct drm_connector_state *conn_sta
 	if (panel->backlight.enabled)
 		intel_panel_actually_set_backlight(conn_state, hw_level);
 
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 }
 
 static int intel_backlight_device_update_status(struct backlight_device *bd)
@@ -1591,11 +1591,11 @@ void intel_backlight_update(struct intel_atomic_state *state,
 	if (!panel->backlight.present)
 		return;
 
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 	if (!panel->backlight.enabled)
 		__intel_backlight_enable(crtc_state, conn_state);
 
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 }
 
 int intel_backlight_setup(struct intel_connector *connector, enum pipe pipe)
@@ -1620,9 +1620,9 @@ int intel_backlight_setup(struct intel_connector *connector, enum pipe pipe)
 		return -ENODEV;
 
 	/* set level and max in panel struct */
-	mutex_lock(&dev_priv->backlight_lock);
+	mutex_lock(&dev_priv->display.backlight.lock);
 	ret = panel->backlight.funcs->setup(connector, pipe);
-	mutex_unlock(&dev_priv->backlight_lock);
+	mutex_unlock(&dev_priv->display.backlight.lock);
 
 	if (ret) {
 		drm_dbg_kms(&dev_priv->drm,

drivers/gpu/drm/i915/display/intel_display_core.h

@@ -218,6 +218,11 @@ struct intel_display {
 	} funcs;
 
 	/* Grouping using anonymous structs. Keep sorted. */
+	struct {
+		/* backlight registers and fields in struct intel_panel */
+		struct mutex lock;
+	} backlight;
+
 	struct {
 		struct intel_global_obj obj;
 

drivers/gpu/drm/i915/i915_driver.c

@@ -330,7 +330,7 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv)
 
 	spin_lock_init(&dev_priv->irq_lock);
 	spin_lock_init(&dev_priv->gpu_error.lock);
-	mutex_init(&dev_priv->backlight_lock);
+	mutex_init(&dev_priv->display.backlight.lock);
 
 	mutex_init(&dev_priv->sb_lock);
 	cpu_latency_qos_add_request(&dev_priv->sb_qos, PM_QOS_DEFAULT_VALUE);

drivers/gpu/drm/i915/i915_drv.h

@@ -330,9 +330,6 @@ struct drm_i915_private {
 
 	bool preserve_bios_swizzle;
 
-	/* backlight registers and fields in struct intel_panel */
-	struct mutex backlight_lock;
-
 	unsigned int fsb_freq, mem_freq, is_ddr3;
 	unsigned int skl_preferred_vco_freq;