udl_encoder.c

Go to the documentation of this file.

/*
 * Copyright (C) 2012 Red Hat
 * based in parts on udlfb.c:
 * Copyright (C) 2009 Roberto De Ioris <[email protected]>
 * Copyright (C) 2009 Jaya Kumar <[email protected]>
 * Copyright (C) 2009 Bernie Thompson <[email protected]>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License v2. See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "udl_drv.h"

/* dummy encoder */
static void udl_enc_destroy(struct drm_encoder *encoder)
{
    drm_encoder_cleanup(encoder);
    kfree(encoder);
}

static void udl_encoder_disable(struct drm_encoder *encoder)
{
}

static bool udl_mode_fixup(struct drm_encoder *encoder,
               const struct drm_display_mode *mode,
               struct drm_display_mode *adjusted_mode)
{
    return true;
}

static void udl_encoder_prepare(struct drm_encoder *encoder)
{
}

static void udl_encoder_commit(struct drm_encoder *encoder)
{
}

static void udl_encoder_mode_set(struct drm_encoder *encoder,
                 struct drm_display_mode *mode,
                 struct drm_display_mode *adjusted_mode)
{
}

static void
udl_encoder_dpms(struct drm_encoder *encoder, int mode)
{
}

static const struct drm_encoder_helper_funcs udl_helper_funcs = {
    .dpms = udl_encoder_dpms,
    .mode_fixup = udl_mode_fixup,
    .prepare = udl_encoder_prepare,
    .mode_set = udl_encoder_mode_set,
    .commit = udl_encoder_commit,
    .disable = udl_encoder_disable,
};

static const struct drm_encoder_funcs udl_enc_funcs = {
    .destroy = udl_enc_destroy,
};

struct drm_encoder *udl_encoder_init(struct drm_device *dev)
{
    struct drm_encoder *encoder;

    encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL);
    if (!encoder)
        return NULL;

    drm_encoder_init(dev, encoder, &udl_enc_funcs, DRM_MODE_ENCODER_TMDS);
    drm_encoder_helper_add(encoder, &udl_helper_funcs);
    encoder->possible_crtcs = 1;
    return encoder;
}