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ff9b47a02a
Attach the panel-bridge created by drm_panel_bridge_add() to the
parallel RGB encoder.
Fixes: 96160a8071 ("drm/atmel-hlcdc: Replace the panel usage with drm_panel_bridge.")
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1496748866-17165-1-git-send-email-boris.brezillon@free-electrons.com
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
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* Copyright (C) 2014 Traphandler
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* Copyright (C) 2014 Free Electrons
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* Copyright (C) 2014 Atmel
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*
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* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
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* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_of.h>
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#include <drm/drm_bridge.h>
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#include "atmel_hlcdc_dc.h"
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static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
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const struct device_node *np)
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{
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struct drm_encoder *encoder;
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struct drm_panel *panel;
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struct drm_bridge *bridge;
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int ret;
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encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
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if (!encoder)
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return -EINVAL;
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ret = drm_encoder_init(dev, encoder,
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&atmel_hlcdc_panel_encoder_funcs,
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DRM_MODE_ENCODER_NONE, NULL);
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if (ret)
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return ret;
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encoder->possible_crtcs = 0x1;
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ret = drm_of_find_panel_or_bridge(np, 0, 0, &panel, &bridge);
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if (ret)
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return ret;
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if (panel) {
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bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_Unknown);
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if (IS_ERR(bridge))
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return PTR_ERR(bridge);
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}
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if (bridge) {
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ret = drm_bridge_attach(encoder, bridge, NULL);
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if (!ret)
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return 0;
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if (panel)
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drm_panel_bridge_remove(bridge);
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}
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drm_encoder_cleanup(encoder);
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return ret;
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}
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int atmel_hlcdc_create_outputs(struct drm_device *dev)
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{
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struct device_node *remote;
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int ret = -ENODEV;
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int endpoint = 0;
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while (true) {
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/* Loop thru possible multiple connections to the output */
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remote = of_graph_get_remote_node(dev->dev->of_node, 0,
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endpoint++);
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if (!remote)
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break;
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ret = atmel_hlcdc_attach_endpoint(dev, remote);
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of_node_put(remote);
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if (ret)
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return ret;
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}
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return ret;
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}
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