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1/*
2 * drivers/gpu/drm/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 <linux/list.h>
21
22#include <drm/drm_crtc.h>
23#include <drm/drm_crtc_helper.h>
24#include <drm/drm_edid.h>
25
26#include "omap_drv.h"
27
28/*
29 * encoder funcs
30 */
31
32#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
33
34/* The encoder and connector both map to same dssdev.. the encoder
35 * handles the 'active' parts, ie. anything the modifies the state
36 * of the hw, and the connector handles the 'read-only' parts, like
37 * detecting connection and reading edid.
38 */
39struct omap_encoder {
40 struct drm_encoder base;
41 struct omap_dss_device *dssdev;
42};
43
44struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder)
45{
46 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
47
48 return omap_encoder->dssdev;
49}
50
51static void omap_encoder_destroy(struct drm_encoder *encoder)
52{
53 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
54
55 drm_encoder_cleanup(encoder);
56 kfree(omap_encoder);
57}
58
59static const struct drm_encoder_funcs omap_encoder_funcs = {
60 .destroy = omap_encoder_destroy,
61};
62
63static void omap_encoder_mode_set(struct drm_encoder *encoder,
64 struct drm_display_mode *mode,
65 struct drm_display_mode *adjusted_mode)
66{
67 struct drm_device *dev = encoder->dev;
68 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
69 struct omap_dss_device *dssdev = omap_encoder->dssdev;
70 struct drm_connector *connector;
71 bool hdmi_mode;
72 int r;
73
74 hdmi_mode = false;
75 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
76 if (connector->encoder == encoder) {
77 hdmi_mode = omap_connector_get_hdmi_mode(connector);
78 break;
79 }
80 }
81
82 if (dssdev->driver->set_hdmi_mode)
83 dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode);
84
85 if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) {
86 struct hdmi_avi_infoframe avi;
87
88 r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode);
89 if (r == 0)
90 dssdev->driver->set_hdmi_infoframe(dssdev, &avi);
91 }
92}
93
94static void omap_encoder_disable(struct drm_encoder *encoder)
95{
96 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
97 struct omap_dss_device *dssdev = omap_encoder->dssdev;
98 struct omap_dss_driver *dssdrv = dssdev->driver;
99
100 dssdrv->disable(dssdev);
101}
102
103static int omap_encoder_update(struct drm_encoder *encoder,
104 enum omap_channel channel,
105 struct omap_video_timings *timings)
106{
107 struct drm_device *dev = encoder->dev;
108 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
109 struct omap_dss_device *dssdev = omap_encoder->dssdev;
110 struct omap_dss_driver *dssdrv = dssdev->driver;
111 int ret;
112
113 if (dssdrv->check_timings) {
114 ret = dssdrv->check_timings(dssdev, timings);
115 } else {
116 struct omap_video_timings t = {0};
117
118 dssdrv->get_timings(dssdev, &t);
119
120 if (memcmp(timings, &t, sizeof(struct omap_video_timings)))
121 ret = -EINVAL;
122 else
123 ret = 0;
124 }
125
126 if (ret) {
127 dev_err(dev->dev, "could not set timings: %d\n", ret);
128 return ret;
129 }
130
131 if (dssdrv->set_timings)
132 dssdrv->set_timings(dssdev, timings);
133
134 return 0;
135}
136
137static void omap_encoder_enable(struct drm_encoder *encoder)
138{
139 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
140 struct omap_dss_device *dssdev = omap_encoder->dssdev;
141 struct omap_dss_driver *dssdrv = dssdev->driver;
142 int r;
143
144 omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc),
145 omap_crtc_timings(encoder->crtc));
146
147 r = dssdrv->enable(dssdev);
148 if (r)
149 dev_err(encoder->dev->dev,
150 "Failed to enable display '%s': %d\n",
151 dssdev->name, r);
152}
153
154static int omap_encoder_atomic_check(struct drm_encoder *encoder,
155 struct drm_crtc_state *crtc_state,
156 struct drm_connector_state *conn_state)
157{
158 return 0;
159}
160
161static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
162 .mode_set = omap_encoder_mode_set,
163 .disable = omap_encoder_disable,
164 .enable = omap_encoder_enable,
165 .atomic_check = omap_encoder_atomic_check,
166};
167
168/* initialize encoder */
169struct drm_encoder *omap_encoder_init(struct drm_device *dev,
170 struct omap_dss_device *dssdev)
171{
172 struct drm_encoder *encoder = NULL;
173 struct omap_encoder *omap_encoder;
174
175 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
176 if (!omap_encoder)
177 goto fail;
178
179 omap_encoder->dssdev = dssdev;
180
181 encoder = &omap_encoder->base;
182
183 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
184 DRM_MODE_ENCODER_TMDS, NULL);
185 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
186
187 return encoder;
188
189fail:
190 if (encoder)
191 omap_encoder_destroy(encoder);
192
193 return NULL;
194}
1/*
2 * drivers/gpu/drm/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#include <linux/list.h>
26
27
28/*
29 * encoder funcs
30 */
31
32#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
33
34/* The encoder and connector both map to same dssdev.. the encoder
35 * handles the 'active' parts, ie. anything the modifies the state
36 * of the hw, and the connector handles the 'read-only' parts, like
37 * detecting connection and reading edid.
38 */
39struct omap_encoder {
40 struct drm_encoder base;
41 struct omap_dss_device *dssdev;
42};
43
44struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder)
45{
46 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
47
48 return omap_encoder->dssdev;
49}
50
51static void omap_encoder_destroy(struct drm_encoder *encoder)
52{
53 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
54
55 omap_encoder_set_enabled(encoder, false);
56
57 drm_encoder_cleanup(encoder);
58 kfree(omap_encoder);
59}
60
61static const struct drm_encoder_funcs omap_encoder_funcs = {
62 .destroy = omap_encoder_destroy,
63};
64
65/*
66 * The CRTC drm_crtc_helper_set_mode() doesn't really give us the right
67 * order.. the easiest way to work around this for now is to make all
68 * the encoder-helper's no-op's and have the omap_crtc code take care
69 * of the sequencing and call us in the right points.
70 *
71 * Eventually to handle connecting CRTCs to different encoders properly,
72 * either the CRTC helpers need to change or we need to replace
73 * drm_crtc_helper_set_mode(), but lets wait until atomic-modeset for
74 * that.
75 */
76
77static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
78{
79}
80
81static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
82 const struct drm_display_mode *mode,
83 struct drm_display_mode *adjusted_mode)
84{
85 return true;
86}
87
88static void omap_encoder_mode_set(struct drm_encoder *encoder,
89 struct drm_display_mode *mode,
90 struct drm_display_mode *adjusted_mode)
91{
92}
93
94static void omap_encoder_prepare(struct drm_encoder *encoder)
95{
96}
97
98static void omap_encoder_commit(struct drm_encoder *encoder)
99{
100}
101
102static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
103 .dpms = omap_encoder_dpms,
104 .mode_fixup = omap_encoder_mode_fixup,
105 .mode_set = omap_encoder_mode_set,
106 .prepare = omap_encoder_prepare,
107 .commit = omap_encoder_commit,
108};
109
110/*
111 * Instead of relying on the helpers for modeset, the omap_crtc code
112 * calls these functions in the proper sequence.
113 */
114
115int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled)
116{
117 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
118 struct omap_dss_device *dssdev = omap_encoder->dssdev;
119 struct omap_dss_driver *dssdrv = dssdev->driver;
120
121 if (enabled) {
122 return dssdrv->enable(dssdev);
123 } else {
124 dssdrv->disable(dssdev);
125 return 0;
126 }
127}
128
129int omap_encoder_update(struct drm_encoder *encoder,
130 struct omap_overlay_manager *mgr,
131 struct omap_video_timings *timings)
132{
133 struct drm_device *dev = encoder->dev;
134 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
135 struct omap_dss_device *dssdev = omap_encoder->dssdev;
136 struct omap_dss_driver *dssdrv = dssdev->driver;
137 int ret;
138
139 dssdev->src->manager = mgr;
140
141 if (dssdrv->check_timings) {
142 ret = dssdrv->check_timings(dssdev, timings);
143 } else {
144 struct omap_video_timings t = {0};
145
146 dssdrv->get_timings(dssdev, &t);
147
148 if (memcmp(timings, &t, sizeof(struct omap_video_timings)))
149 ret = -EINVAL;
150 else
151 ret = 0;
152 }
153
154 if (ret) {
155 dev_err(dev->dev, "could not set timings: %d\n", ret);
156 return ret;
157 }
158
159 if (dssdrv->set_timings)
160 dssdrv->set_timings(dssdev, timings);
161
162 return 0;
163}
164
165/* initialize encoder */
166struct drm_encoder *omap_encoder_init(struct drm_device *dev,
167 struct omap_dss_device *dssdev)
168{
169 struct drm_encoder *encoder = NULL;
170 struct omap_encoder *omap_encoder;
171
172 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
173 if (!omap_encoder)
174 goto fail;
175
176 omap_encoder->dssdev = dssdev;
177
178 encoder = &omap_encoder->base;
179
180 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
181 DRM_MODE_ENCODER_TMDS);
182 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
183
184 return encoder;
185
186fail:
187 if (encoder)
188 omap_encoder_destroy(encoder);
189
190 return NULL;
191}