drm/i915: Don't store temporary load-detect variables in the generic encoder

Keep all the state required for undoing and restoring the previous pipe
configuration together in a single struct passed from
intel_get_load_detect_pipe() to intel_release_load_detect_pipe() rather
than stuffing them inside the common encoder structure.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

drivers/gpu/drm/i915/intel_crt.c

@@ -430,7 +430,6 @@ intel_crt_detect(struct drm_connector *connector, bool force)
 	struct drm_device *dev = connector->dev;
 	struct intel_crt *crt = intel_attached_crt(connector);
 	struct drm_crtc *crtc;
-	int dpms_mode;
 	enum drm_connector_status status;
 
 	if (I915_HAS_HOTPLUG(dev)) {
@@ -454,14 +453,16 @@ intel_crt_detect(struct drm_connector *connector, bool force)
 	if (crtc && crtc->enabled) {
 		status = intel_crt_load_detect(crt);
 	} else {
-		if (intel_get_load_detect_pipe(&crt->base, connector,
-					       NULL, &dpms_mode)) {
+		struct intel_load_detect_pipe tmp;
+
+		if (intel_get_load_detect_pipe(&crt->base, connector, NULL,
+					       &tmp)) {
 			if (intel_crt_detect_ddc(connector))
 				status = connector_status_connected;
 			else
 				status = intel_crt_load_detect(crt);
-			intel_release_load_detect_pipe(&crt->base,
-						       connector, dpms_mode);
+			intel_release_load_detect_pipe(&crt->base, connector,
+						       &tmp);
 		} else
 			status = connector_status_unknown;
 	}

drivers/gpu/drm/i915/intel_display.c

@@ -5484,7 +5484,7 @@ static struct drm_display_mode load_detect_mode = {
 bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 				struct drm_connector *connector,
 				struct drm_display_mode *mode,
-				int *dpms_mode)
+				struct intel_load_detect_pipe *old)
 {
 	struct intel_crtc *intel_crtc;
 	struct drm_crtc *possible_crtc;
@@ -5509,14 +5509,18 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 	/* See if we already have a CRTC for this connector */
 	if (encoder->crtc) {
 		crtc = encoder->crtc;
-		/* Make sure the crtc and connector are running */
+
 		intel_crtc = to_intel_crtc(crtc);
-		*dpms_mode = intel_crtc->dpms_mode;
+		old->dpms_mode = intel_crtc->dpms_mode;
+		old->load_detect_temp = false;
+
+		/* Make sure the crtc and connector are running */
 		if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
 			crtc_funcs = crtc->helper_private;
 			crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 			encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 		}
+
 		return true;
 	}
 
@@ -5543,10 +5547,10 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 
 	encoder->crtc = crtc;
 	connector->encoder = encoder;
-	intel_encoder->load_detect_temp = true;
 
 	intel_crtc = to_intel_crtc(crtc);
-	*dpms_mode = intel_crtc->dpms_mode;
+	old->dpms_mode = intel_crtc->dpms_mode;
+	old->load_detect_temp = true;
 
 	if (!crtc->enabled) {
 		if (!mode)
@@ -5574,7 +5578,8 @@ bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 }
 
 void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
-				    struct drm_connector *connector, int dpms_mode)
+				    struct drm_connector *connector,
+				    struct intel_load_detect_pipe *old)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_device *dev = encoder->dev;
@@ -5582,19 +5587,18 @@ void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
 	struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
 	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 
-	if (intel_encoder->load_detect_temp) {
+	if (old->load_detect_temp) {
 		encoder->crtc = NULL;
 		connector->encoder = NULL;
-		intel_encoder->load_detect_temp = false;
 		crtc->enabled = drm_helper_crtc_in_use(crtc);
 		drm_helper_disable_unused_functions(dev);
 	}
 
 	/* Switch crtc and encoder back off if necessary */
-	if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
+	if (crtc->enabled && old->dpms_mode != DRM_MODE_DPMS_ON) {
 		if (encoder->crtc == crtc)
-			encoder_funcs->dpms(encoder, dpms_mode);
-		crtc_funcs->dpms(crtc, dpms_mode);
+			encoder_funcs->dpms(encoder, old->dpms_mode);
+		crtc_funcs->dpms(crtc, old->dpms_mode);
 	}
 }
 

drivers/gpu/drm/i915/intel_drv.h

@@ -140,7 +140,6 @@ struct intel_fbdev {
 struct intel_encoder {
 	struct drm_encoder base;
 	int type;
-	bool load_detect_temp;
 	bool needs_tv_clock;
 	void (*hot_plug)(struct intel_encoder *);
 	int crtc_mask;
@@ -291,13 +290,18 @@ int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
 				struct drm_file *file_priv);
 extern void intel_wait_for_vblank(struct drm_device *dev, int pipe);
 extern void intel_wait_for_pipe_off(struct drm_device *dev, int pipe);
+
+struct intel_load_detect_pipe {
+	bool load_detect_temp;
+	int dpms_mode;
+};
 extern bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 				       struct drm_connector *connector,
 				       struct drm_display_mode *mode,
-				       int *dpms_mode);
+				       struct intel_load_detect_pipe *old);
 extern void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
 					   struct drm_connector *connector,
-					   int dpms_mode);
+					   struct intel_load_detect_pipe *old);
 
 extern struct drm_connector* intel_sdvo_find(struct drm_device *dev, int sdvoB);
 extern int intel_sdvo_supports_hotplug(struct drm_connector *connector);

drivers/gpu/drm/i915/intel_tv.c

@@ -1361,13 +1361,14 @@ intel_tv_detect(struct drm_connector *connector, bool force)
 	if (intel_tv->base.base.crtc && intel_tv->base.base.crtc->enabled) {
 		type = intel_tv_detect_type(intel_tv, connector);
 	} else if (force) {
-		int dpms_mode;
+		struct intel_load_detect_pipe tmp;
 
 		if (intel_get_load_detect_pipe(&intel_tv->base, connector,
-					       &mode, &dpms_mode)) {
+					       &mode, &tmp)) {
 			type = intel_tv_detect_type(intel_tv, connector);
-			intel_release_load_detect_pipe(&intel_tv->base, connector,
-						       dpms_mode);
+			intel_release_load_detect_pipe(&intel_tv->base,
+						       connector,
+						       &tmp);
 		} else
 			return connector_status_unknown;
 	} else