diff options
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 44 | ||||
| -rw-r--r-- | include/drm/drm_modes.h | 13 |
2 files changed, 50 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index dfc8ca1e9413..9b9ba5d5ec0c 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -1531,8 +1531,10 @@ static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *conne return connector->encoder; } -static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, - const struct drm_file *file_priv) +static bool +drm_mode_expose_to_userspace(const struct drm_display_mode *mode, + const struct list_head *export_list, + const struct drm_file *file_priv) { /* * If user-space hasn't configured the driver to expose the stereo 3D @@ -1540,6 +1542,23 @@ static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, */ if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) return false; + /* + * If user-space hasn't configured the driver to expose the modes + * with aspect-ratio, don't expose them. However if such a mode + * is unique, let it be exposed, but reset the aspect-ratio flags + * while preparing the list of user-modes. + */ + if (!file_priv->aspect_ratio_allowed) { + struct drm_display_mode *mode_itr; + + list_for_each_entry(mode_itr, export_list, export_head) + if (drm_mode_match(mode_itr, mode, + DRM_MODE_MATCH_TIMINGS | + DRM_MODE_MATCH_CLOCK | + DRM_MODE_MATCH_FLAGS | + DRM_MODE_MATCH_3D_FLAGS)) + return false; + } return true; } @@ -1559,6 +1578,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, struct drm_mode_modeinfo u_mode; struct drm_mode_modeinfo __user *mode_ptr; uint32_t __user *encoder_ptr; + LIST_HEAD(export_list); if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; @@ -1607,21 +1627,31 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, /* delayed so we get modes regardless of pre-fill_modes state */ list_for_each_entry(mode, &connector->modes, head) - if (drm_mode_expose_to_userspace(mode, file_priv)) + if (drm_mode_expose_to_userspace(mode, &export_list, + file_priv)) { + list_add_tail(&mode->export_head, &export_list); mode_count++; + } /* * This ioctl is called twice, once to determine how much space is * needed, and the 2nd time to fill it. + * The modes that need to be exposed to the user are maintained in the + * 'export_list'. When the ioctl is called first time to determine the, + * space, the export_list gets filled, to find the no.of modes. In the + * 2nd time, the user modes are filled, one by one from the export_list. */ if ((out_resp->count_modes >= mode_count) && mode_count) { copied = 0; mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; - list_for_each_entry(mode, &connector->modes, head) { - if (!drm_mode_expose_to_userspace(mode, file_priv)) - continue; - + list_for_each_entry(mode, &export_list, export_head) { drm_mode_convert_to_umode(&u_mode, mode); + /* + * Reset aspect ratio flags of user-mode, if modes with + * aspect-ratio are not supported. + */ + if (!file_priv->aspect_ratio_allowed) + u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; if (copy_to_user(mode_ptr + copied, &u_mode, sizeof(u_mode))) { ret = -EFAULT; diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h index 2f78b7ee4824..b159fe07fcf9 100644 --- a/include/drm/drm_modes.h +++ b/include/drm/drm_modes.h @@ -411,6 +411,19 @@ struct drm_display_mode { * Field for setting the HDMI picture aspect ratio of a mode. */ enum hdmi_picture_aspect picture_aspect_ratio; + + /** + * @export_head: + * + * struct list_head for modes to be exposed to the userspace. + * This is to maintain a list of exposed modes while preparing + * user-mode's list in drm_mode_getconnector ioctl. The purpose of this + * list_head only lies in the ioctl function, and is not expected to be + * used outside the function. + * Once used, the stale pointers are not reset, but left as it is, to + * avoid overhead of protecting it by mode_config.mutex. + */ + struct list_head export_head; }; /** |