1/*
2 * drivers/staging/omapdrm/omap_encoder.c
3 *
4 * Copyright (C) 2011 Texas Instruments
5 * Author: Rob Clark <rob@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program.  If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include "omap_drv.h"
21
22#include "drm_crtc.h"
23#include "drm_crtc_helper.h"
24
25/*
26 * encoder funcs
27 */
28
29#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
30
31struct omap_encoder {
32	struct drm_encoder base;
33	struct omap_overlay_manager *mgr;
34};
35
36static void omap_encoder_destroy(struct drm_encoder *encoder)
37{
38	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
39	DBG("%s", omap_encoder->mgr->name);
40	drm_encoder_cleanup(encoder);
41	kfree(omap_encoder);
42}
43
44static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
45{
46	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
47	DBG("%s: %d", omap_encoder->mgr->name, mode);
48}
49
50static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
51				  struct drm_display_mode *mode,
52				  struct drm_display_mode *adjusted_mode)
53{
54	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
55	DBG("%s", omap_encoder->mgr->name);
56	return true;
57}
58
59static void omap_encoder_mode_set(struct drm_encoder *encoder,
60				struct drm_display_mode *mode,
61				struct drm_display_mode *adjusted_mode)
62{
63	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
64	struct drm_device *dev = encoder->dev;
65	struct omap_drm_private *priv = dev->dev_private;
66	int i;
67
68	mode = adjusted_mode;
69
70	DBG("%s: set mode: %dx%d", omap_encoder->mgr->name,
71			mode->hdisplay, mode->vdisplay);
72
73	for (i = 0; i < priv->num_connectors; i++) {
74		struct drm_connector *connector = priv->connectors[i];
75		if (connector->encoder == encoder) {
76			omap_connector_mode_set(connector, mode);
77		}
78	}
79}
80
81static void omap_encoder_prepare(struct drm_encoder *encoder)
82{
83	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
84	struct drm_encoder_helper_funcs *encoder_funcs =
85				encoder->helper_private;
86	DBG("%s", omap_encoder->mgr->name);
87	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
88}
89
90static void omap_encoder_commit(struct drm_encoder *encoder)
91{
92	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
93	struct drm_encoder_helper_funcs *encoder_funcs =
94				encoder->helper_private;
95	DBG("%s", omap_encoder->mgr->name);
96	omap_encoder->mgr->apply(omap_encoder->mgr);
97	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
98}
99
100static const struct drm_encoder_funcs omap_encoder_funcs = {
101	.destroy = omap_encoder_destroy,
102};
103
104static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
105	.dpms = omap_encoder_dpms,
106	.mode_fixup = omap_encoder_mode_fixup,
107	.mode_set = omap_encoder_mode_set,
108	.prepare = omap_encoder_prepare,
109	.commit = omap_encoder_commit,
110};
111
112struct omap_overlay_manager *omap_encoder_get_manager(
113		struct drm_encoder *encoder)
114{
115	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
116	return omap_encoder->mgr;
117}
118
119/* initialize encoder */
120struct drm_encoder *omap_encoder_init(struct drm_device *dev,
121		struct omap_overlay_manager *mgr)
122{
123	struct drm_encoder *encoder = NULL;
124	struct omap_encoder *omap_encoder;
125	struct omap_overlay_manager_info info;
126	int ret;
127
128	DBG("%s", mgr->name);
129
130	omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
131	if (!omap_encoder) {
132		dev_err(dev->dev, "could not allocate encoder\n");
133		goto fail;
134	}
135
136	omap_encoder->mgr = mgr;
137	encoder = &omap_encoder->base;
138
139	drm_encoder_init(dev, encoder, &omap_encoder_funcs,
140			 DRM_MODE_ENCODER_TMDS);
141	drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
142
143	mgr->get_manager_info(mgr, &info);
144
145	/* TODO: fix hard-coded setup.. */
146	info.default_color = 0x00000000;
147	info.trans_key = 0x00000000;
148	info.trans_key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
149	info.trans_enabled = false;
150
151	ret = mgr->set_manager_info(mgr, &info);
152	if (ret) {
153		dev_err(dev->dev, "could not set manager info\n");
154		goto fail;
155	}
156
157	ret = mgr->apply(mgr);
158	if (ret) {
159		dev_err(dev->dev, "could not apply\n");
160		goto fail;
161	}
162
163	return encoder;
164
165fail:
166	if (encoder) {
167		omap_encoder_destroy(encoder);
168	}
169
170	return NULL;
171}
172