X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fdrm_atomic.c;h=f6f2fb58eb37f583f6568964f9ad8aab8be75968;hb=06be5eefe1192eb8ce8d07497f67595b6bfe9741;hp=3134f506b762b0ba134e71403dac505ef7098659;hpb=e01e9f75a0c4e6cdbf1f139e37e9161408e49b7c;p=karo-tx-linux.git

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 3134f506b762..f6f2fb58eb37 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -289,6 +289,100 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state,
 }
 EXPORT_SYMBOL(drm_atomic_get_crtc_state);
 
+/**
+ * drm_atomic_set_mode_for_crtc - set mode for CRTC
+ * @state: the CRTC whose incoming state to update
+ * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
+ *
+ * Set a mode (originating from the kernel) on the desired CRTC state. Does
+ * not change any other state properties, including enable, active, or
+ * mode_changed.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure. Cannot return -EDEADLK.
+ */
+int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
+				 struct drm_display_mode *mode)
+{
+	struct drm_mode_modeinfo umode;
+
+	/* Early return for no change. */
+	if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
+		return 0;
+
+	if (state->mode_blob)
+		drm_property_unreference_blob(state->mode_blob);
+	state->mode_blob = NULL;
+
+	if (mode) {
+		drm_mode_convert_to_umode(&umode, mode);
+		state->mode_blob =
+			drm_property_create_blob(state->crtc->dev,
+		                                 sizeof(umode),
+		                                 &umode);
+		if (IS_ERR(state->mode_blob))
+			return PTR_ERR(state->mode_blob);
+
+		drm_mode_copy(&state->mode, mode);
+		state->enable = true;
+		DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
+				 mode->name, state);
+	} else {
+		memset(&state->mode, 0, sizeof(state->mode));
+		state->enable = false;
+		DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
+				 state);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
+
+/**
+ * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
+ * @state: the CRTC whose incoming state to update
+ * @blob: pointer to blob property to use for mode
+ *
+ * Set a mode (originating from a blob property) on the desired CRTC state.
+ * This function will take a reference on the blob property for the CRTC state,
+ * and release the reference held on the state's existing mode property, if any
+ * was set.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure. Cannot return -EDEADLK.
+ */
+int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
+                                      struct drm_property_blob *blob)
+{
+	if (blob == state->mode_blob)
+		return 0;
+
+	if (state->mode_blob)
+		drm_property_unreference_blob(state->mode_blob);
+	state->mode_blob = NULL;
+
+	if (blob) {
+		if (blob->length != sizeof(struct drm_mode_modeinfo) ||
+		    drm_mode_convert_umode(&state->mode,
+		                           (const struct drm_mode_modeinfo *)
+		                            blob->data))
+			return -EINVAL;
+
+		state->mode_blob = drm_property_reference_blob(blob);
+		state->enable = true;
+		DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
+				 state->mode.name, state);
+	} else {
+		memset(&state->mode, 0, sizeof(state->mode));
+		state->enable = false;
+		DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
+				 state);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
+
 /**
  * drm_atomic_crtc_set_property - set property on CRTC
  * @crtc: the drm CRTC to set a property on
@@ -311,10 +405,18 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_mode_config *config = &dev->mode_config;
+	int ret;
 
-	/* FIXME: Mode prop is missing, which also controls ->enable. */
 	if (property == config->prop_active)
 		state->active = val;
+	else if (property == config->prop_mode_id) {
+		struct drm_property_blob *mode =
+			drm_property_lookup_blob(dev, val);
+		ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
+		if (mode)
+			drm_property_unreference_blob(mode);
+		return ret;
+	}
 	else if (crtc->funcs->atomic_set_property)
 		return crtc->funcs->atomic_set_property(crtc, state, property, val);
 	else
@@ -339,6 +441,8 @@ int drm_atomic_crtc_get_property(struct drm_crtc *crtc,
 
 	if (property == config->prop_active)
 		*val = state->active;
+	else if (property == config->prop_mode_id)
+		*val = (state->mode_blob) ? state->mode_blob->base.id : 0;
 	else if (crtc->funcs->atomic_get_property)
 		return crtc->funcs->atomic_get_property(crtc, state, property, val);
 	else
@@ -374,6 +478,23 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
 		return -EINVAL;
 	}
 
+	/* The state->enable vs. state->mode_blob checks can be WARN_ON,
+	 * as this is a kernel-internal detail that userspace should never
+	 * be able to trigger. */
+	if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
+	    WARN_ON(state->enable && !state->mode_blob)) {
+		DRM_DEBUG_ATOMIC("[CRTC:%d] enabled without mode blob\n",
+				 crtc->base.id);
+		return -EINVAL;
+	}
+
+	if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
+	    WARN_ON(!state->enable && state->mode_blob)) {
+		DRM_DEBUG_ATOMIC("[CRTC:%d] disabled with mode blob\n",
+				 crtc->base.id);
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -1095,8 +1216,7 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
 
 	if (!state->allow_modeset) {
 		for_each_crtc_in_state(state, crtc, crtc_state, i) {
-			if (crtc_state->mode_changed ||
-			    crtc_state->active_changed) {
+			if (drm_atomic_crtc_needs_modeset(crtc_state)) {
 				DRM_DEBUG_ATOMIC("[CRTC:%d] requires full modeset\n",
 						 crtc->base.id);
 				return -EINVAL;