diff options
Diffstat (limited to 'drivers/gpu/drm/mxsfb/mxsfb_out.c')
| -rw-r--r-- | drivers/gpu/drm/mxsfb/mxsfb_out.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_out.c b/drivers/gpu/drm/mxsfb/mxsfb_out.c new file mode 100644 index 000000000000..fa8d17399407 --- /dev/null +++ b/drivers/gpu/drm/mxsfb/mxsfb_out.c @@ -0,0 +1,131 @@ +/* + * Copyright (C) 2016 Marek Vasut <marex@denx.de> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/of_graph.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_panel.h> +#include <drm/drm_plane_helper.h> +#include <drm/drm_simple_kms_helper.h> +#include <drm/drmP.h> + +#include "mxsfb_drv.h" + +static struct mxsfb_drm_private * +drm_connector_to_mxsfb_drm_private(struct drm_connector *connector) +{ + return container_of(connector, struct mxsfb_drm_private, connector); +} + +static int mxsfb_panel_get_modes(struct drm_connector *connector) +{ + struct mxsfb_drm_private *mxsfb = + drm_connector_to_mxsfb_drm_private(connector); + + if (mxsfb->panel) + return mxsfb->panel->funcs->get_modes(mxsfb->panel); + + return 0; +} + +static const struct +drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = { + .get_modes = mxsfb_panel_get_modes, +}; + +static enum drm_connector_status +mxsfb_panel_connector_detect(struct drm_connector *connector, bool force) +{ + struct mxsfb_drm_private *mxsfb = + drm_connector_to_mxsfb_drm_private(connector); + + if (mxsfb->panel) + return connector_status_connected; + + return connector_status_disconnected; +} + +static void mxsfb_panel_connector_destroy(struct drm_connector *connector) +{ + struct mxsfb_drm_private *mxsfb = + drm_connector_to_mxsfb_drm_private(connector); + + if (mxsfb->panel) + drm_panel_detach(mxsfb->panel); + + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs mxsfb_panel_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = mxsfb_panel_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = mxsfb_panel_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int mxsfb_attach_endpoint(struct drm_device *drm, + const struct of_endpoint *ep) +{ + struct mxsfb_drm_private *mxsfb = drm->dev_private; + struct device_node *np; + struct drm_panel *panel; + int ret = -EPROBE_DEFER; + + np = of_graph_get_remote_port_parent(ep->local_node); + panel = of_drm_find_panel(np); + of_node_put(np); + + if (!panel) + return -EPROBE_DEFER; + + mxsfb->connector.dpms = DRM_MODE_DPMS_OFF; + mxsfb->connector.polled = 0; + drm_connector_helper_add(&mxsfb->connector, + &mxsfb_panel_connector_helper_funcs); + ret = drm_connector_init(drm, &mxsfb->connector, + &mxsfb_panel_connector_funcs, + DRM_MODE_CONNECTOR_Unknown); + if (!ret) + mxsfb->panel = panel; + + return ret; +} + +int mxsfb_create_output(struct drm_device *drm) +{ + struct device_node *ep_np = NULL; + struct of_endpoint ep; + int ret; + + for_each_endpoint_of_node(drm->dev->of_node, ep_np) { + ret = of_graph_parse_endpoint(ep_np, &ep); + if (!ret) + ret = mxsfb_attach_endpoint(drm, &ep); + + if (ret) { + of_node_put(ep_np); + return ret; + } + } + + return 0; +} |