59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* ARC PGU DRM driver.
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*
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* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <drm/drm_crtc.h>
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#include <drm/drm_encoder_slave.h>
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#include "arcpgu.h"
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static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
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{
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struct drm_encoder *encoder;
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struct drm_bridge *bridge;
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int ret = 0;
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encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
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if (encoder == NULL)
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return -ENOMEM;
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/* Locate drm bridge from the hdmi encoder DT node */
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bridge = of_drm_find_bridge(np);
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if (!bridge)
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return -EPROBE_DEFER;
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encoder->possible_crtcs = 1;
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encoder->possible_clones = 0;
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ret = drm_encoder_init(drm, encoder, &arcpgu_drm_encoder_funcs,
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DRM_MODE_ENCODER_TMDS, NULL);
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if (ret)
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return ret;
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/* Link drm_bridge to encoder */
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bridge->encoder = encoder;
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encoder->bridge = bridge;
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ret = drm_bridge_attach(drm, bridge);
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if (ret)
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drm_encoder_cleanup(encoder);
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return ret;
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}
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