LXR linux/drivers/gpu/drm/arc/arcpgu

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * ARC PGU DRM driver.
   4 *
   5 * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
   6 */
   7
   8#include <drm/drm_crtc.h>
   9#include <drm/drm_encoder.h>
  10#include <drm/drm_device.h>
  11
  12#include "arcpgu.h"
  13
  14static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
  15        .destroy = drm_encoder_cleanup,
  16};
  17
  18int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
  19{
  20        struct drm_encoder *encoder;
  21        struct drm_bridge *bridge;
  22
  23        int ret = 0;
  24
  25        encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
  26        if (encoder == NULL)
  27                return -ENOMEM;
  28
  29        /* Locate drm bridge from the hdmi encoder DT node */
  30        bridge = of_drm_find_bridge(np);
  31        if (!bridge)
  32                return -EPROBE_DEFER;
  33
  34        encoder->possible_crtcs = 1;
  35        encoder->possible_clones = 0;
  36        ret = drm_encoder_init(drm, encoder, &arcpgu_drm_encoder_funcs,
  37                               DRM_MODE_ENCODER_TMDS, NULL);
  38        if (ret)
  39                return ret;
  40
  41        /* Link drm_bridge to encoder */
  42        ret = drm_bridge_attach(encoder, bridge, NULL);
  43        if (ret)
  44                drm_encoder_cleanup(encoder);
  45
  46        return ret;
  47}
  48