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path: root/linux-core/drm_crtc_helper.c
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Diffstat (limited to 'linux-core/drm_crtc_helper.c')
-rw-r--r--linux-core/drm_crtc_helper.c68
1 files changed, 59 insertions, 9 deletions
diff --git a/linux-core/drm_crtc_helper.c b/linux-core/drm_crtc_helper.c
index a4168f68..2ceaa860 100644
--- a/linux-core/drm_crtc_helper.c
+++ b/linux-core/drm_crtc_helper.c
@@ -386,7 +386,7 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mo
if (encoder->crtc != crtc)
continue;
- encoder_funcs = encoder->helper_private;
+ encoder_funcs = encoder->helper_private;
if (!(ret = encoder_funcs->mode_fixup(encoder, mode, adjusted_mode))) {
goto done;
}
@@ -475,12 +475,14 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
{
struct drm_device *dev;
struct drm_crtc **save_crtcs, *new_crtc;
+ struct drm_encoder **save_encoders, *new_encoder;
bool save_enabled;
bool changed = false;
bool flip_or_move = false;
struct drm_connector *connector;
- int count = 0, ro;
+ int count = 0, ro, fail = 0;
struct drm_crtc_helper_funcs *crtc_funcs;
+ int ret = 0;
DRM_DEBUG("\n");
@@ -506,6 +508,12 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
if (!save_crtcs)
return -ENOMEM;
+ save_encoders = kzalloc(dev->mode_config.num_connector * sizeof(struct drm_encoders *), GFP_KERNEL);
+ if (!save_encoders) {
+ kfree(save_crtcs);
+ return -ENOMEM;
+ }
+
/* We should be able to check here if the fb has the same properties
* and then just flip_or_move it */
if (set->crtc->fb != set->fb)
@@ -521,6 +529,35 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
changed = true;
}
+ /* a) traverse passed in connector list and get encoders for them */
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
+ save_encoders[count++] = connector->encoder;
+ new_encoder = NULL;
+ for (ro = 0; ro < set->num_connectors; ro++) {
+ if (set->connectors[ro] == connector) {
+ new_encoder = connector_funcs->best_encoder(connector);
+ /* if we can't get an encoder for a connector
+ we are setting now - then fail */
+ if (new_encoder == NULL)
+ /* don't break so fail path works correct */
+ fail = 1;
+ break;
+ }
+ }
+
+ if (new_encoder != connector->encoder) {
+ changed = true;
+ connector->encoder = new_encoder;
+ }
+ }
+
+ if (fail) {
+ ret = -EINVAL;
+ goto fail_no_encoder;
+ }
+
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (!connector->encoder)
continue;
@@ -553,13 +590,9 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
DRM_DEBUG("attempting to set mode from userspace\n");
drm_mode_debug_printmodeline(set->mode);
if (!drm_crtc_helper_set_mode(set->crtc, set->mode, set->x,
- set->y)) {
- set->crtc->enabled = save_enabled;
- count = 0;
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
- connector->encoder->crtc = save_crtcs[count++];
- kfree(save_crtcs);
- return -EINVAL;
+ set->y)) {
+ ret = -EINVAL;
+ goto fail_set_mode;
}
/* TODO are these needed? */
set->crtc->desired_x = set->x;
@@ -573,8 +606,25 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
crtc_funcs->mode_set_base(set->crtc, set->x, set->y);
}
+ kfree(save_encoders);
kfree(save_crtcs);
return 0;
+
+fail_set_mode:
+ set->crtc->enabled = save_enabled;
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ connector->encoder->crtc = save_crtcs[count++];
+fail_no_encoder:
+ kfree(save_crtcs);
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ connector->encoder = save_encoders[count++];
+ }
+ kfree(save_encoders);
+ return ret;
+
+
}
EXPORT_SYMBOL(drm_crtc_helper_set_config);