kernel/drivers/staging/imgtec/tc/drm_pdp_tmds.c

/* -*- mode: c; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* vi: set ts=8 sw=8 sts=8: */
/*************************************************************************/ /*!
@File
@Codingstyle    LinuxKernel
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@License        MIT

The contents of this file are subject to the MIT license as set out below.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

This License is also included in this distribution in the file called
"MIT-COPYING".

EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/ /**************************************************************************/

#include <drm/drmP.h>
#include <drm/drm_crtc.h>

#include "drm_pdp_drv.h"

#include "kernel_compatibility.h"

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

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

static void pdp_tmds_encoder_helper_prepare(struct drm_encoder *encoder)
{
}

static void pdp_tmds_encoder_helper_commit(struct drm_encoder *encoder)
{
}

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

static void pdp_tmds_encoder_destroy(struct drm_encoder *encoder)
{
	struct pdp_drm_private *dev_priv = encoder->dev->dev_private;

	DRM_DEBUG_DRIVER("[ENCODER:%d:%s]\n",
			 encoder->base.id,
			 encoder->name);

	drm_encoder_cleanup(encoder);

	kfree(encoder);
	dev_priv->encoder = NULL;
}

static const struct drm_encoder_helper_funcs pdp_tmds_encoder_helper_funcs = {
	.dpms = pdp_tmds_encoder_helper_dpms,
	.mode_fixup = pdp_tmds_encoder_helper_mode_fixup,
	.prepare = pdp_tmds_encoder_helper_prepare,
	.commit = pdp_tmds_encoder_helper_commit,
	.mode_set = pdp_tmds_encoder_helper_mode_set,
	.get_crtc = NULL,
	.detect = NULL,
	.disable = NULL,
};

static const struct drm_encoder_funcs pdp_tmds_encoder_funcs = {
	.reset = NULL,
	.destroy = pdp_tmds_encoder_destroy,
};

struct drm_encoder *
pdp_tmds_encoder_create(struct drm_device *dev)
{
	struct drm_encoder *encoder;
	int err;

	encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
	if (!encoder)
		return ERR_PTR(-ENOMEM);

	err = drm_encoder_init(dev,
			       encoder,
			       &pdp_tmds_encoder_funcs,
			       DRM_MODE_ENCODER_TMDS,
			       NULL);
	if (err) {
		DRM_ERROR("Failed to initialise encoder");
		return ERR_PTR(err);
	}
	drm_encoder_helper_add(encoder, &pdp_tmds_encoder_helper_funcs);

	/*
	 * This is a bit field that's used to determine which
	 * CRTCs can drive this encoder.
	 */
	encoder->possible_crtcs = 0x1;

	DRM_DEBUG_DRIVER("[ENCODER:%d:%s]\n",
			 encoder->base.id,
			 encoder->name);

	return encoder;
}