1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/list.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include "omap_drv.h"
/*
* encoder funcs
*/
#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
/* The encoder and connector both map to same dssdev.. the encoder
* handles the 'active' parts, ie. anything the modifies the state
* of the hw, and the connector handles the 'read-only' parts, like
* detecting connection and reading edid.
*/
struct omap_encoder {
struct drm_encoder base;
struct omap_dss_device *output;
struct omap_dss_device *display;
};
static void omap_encoder_destroy(struct drm_encoder *encoder)
{
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
drm_encoder_cleanup(encoder);
kfree(omap_encoder);
}
static const struct drm_encoder_funcs omap_encoder_funcs = {
.destroy = omap_encoder_destroy,
};
static void omap_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
struct drm_connector *connector;
struct omap_dss_device *dssdev;
struct videomode vm = { 0 };
bool hdmi_mode;
int r;
drm_display_mode_to_videomode(adjusted_mode, &vm);
/*
* HACK: This fixes the vm flags.
* struct drm_display_mode does not contain the VSYNC/HSYNC/DE flags and
* they get lost when converting back and forth between struct
* drm_display_mode and struct videomode. The hack below goes and
* fetches the missing flags.
*
* A better solution is to use DRM's bus-flags through the whole driver.
*/
for (dssdev = omap_encoder->output; dssdev; dssdev = dssdev->next) {
unsigned long bus_flags = dssdev->bus_flags;
if (!(vm.flags & (DISPLAY_FLAGS_DE_LOW |
DISPLAY_FLAGS_DE_HIGH))) {
if (bus_flags & DRM_BUS_FLAG_DE_LOW)
vm.flags |= DISPLAY_FLAGS_DE_LOW;
else if (bus_flags & DRM_BUS_FLAG_DE_HIGH)
vm.flags |= DISPLAY_FLAGS_DE_HIGH;
}
if (!(vm.flags & (DISPLAY_FLAGS_PIXDATA_POSEDGE |
DISPLAY_FLAGS_PIXDATA_NEGEDGE))) {
if (bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE)
vm.flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
else if (bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)
vm.flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
}
if (!(vm.flags & (DISPLAY_FLAGS_SYNC_POSEDGE |
DISPLAY_FLAGS_SYNC_NEGEDGE))) {
if (bus_flags & DRM_BUS_FLAG_SYNC_POSEDGE)
vm.flags |= DISPLAY_FLAGS_SYNC_POSEDGE;
else if (bus_flags & DRM_BUS_FLAG_SYNC_NEGEDGE)
vm.flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
}
}
/* Set timings for all devices in the display pipeline. */
dss_mgr_set_timings(omap_encoder->output, &vm);
for (dssdev = omap_encoder->output; dssdev; dssdev = dssdev->next) {
if (dssdev->ops->set_timings)
dssdev->ops->set_timings(dssdev, &vm);
}
/* Set the HDMI mode and HDMI infoframe if applicable. */
hdmi_mode = false;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->encoder == encoder) {
hdmi_mode = omap_connector_get_hdmi_mode(connector);
break;
}
}
dssdev = omap_encoder->output;
if (dssdev->ops->hdmi.set_hdmi_mode)
dssdev->ops->hdmi.set_hdmi_mode(dssdev, hdmi_mode);
if (hdmi_mode && dssdev->ops->hdmi.set_infoframe) {
struct hdmi_avi_infoframe avi;
r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode,
false);
if (r == 0)
dssdev->ops->hdmi.set_infoframe(dssdev, &avi);
}
}
static void omap_encoder_disable(struct drm_encoder *encoder)
{
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
struct omap_dss_device *dssdev = omap_encoder->display;
dssdev->ops->disable(dssdev);
}
static void omap_encoder_enable(struct drm_encoder *encoder)
{
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
struct omap_dss_device *dssdev = omap_encoder->display;
int r;
r = dssdev->ops->enable(dssdev);
if (r)
dev_err(encoder->dev->dev,
"Failed to enable display '%s': %d\n",
dssdev->name, r);
}
static int omap_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
enum omap_channel channel = omap_encoder->output->dispc_channel;
struct drm_device *dev = encoder->dev;
struct omap_drm_private *priv = dev->dev_private;
struct omap_dss_device *dssdev;
struct videomode vm = { 0 };
int ret;
drm_display_mode_to_videomode(&crtc_state->mode, &vm);
ret = priv->dispc_ops->mgr_check_timings(priv->dispc, channel, &vm);
if (ret)
goto done;
for (dssdev = omap_encoder->output; dssdev; dssdev = dssdev->next) {
if (!dssdev->ops->check_timings)
continue;
ret = dssdev->ops->check_timings(dssdev, &vm);
if (ret)
goto done;
}
drm_display_mode_from_videomode(&vm, &crtc_state->adjusted_mode);
done:
if (ret)
dev_err(dev->dev, "invalid timings: %d\n", ret);
return ret;
}
static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
.mode_set = omap_encoder_mode_set,
.disable = omap_encoder_disable,
.enable = omap_encoder_enable,
.atomic_check = omap_encoder_atomic_check,
};
/* initialize encoder */
struct drm_encoder *omap_encoder_init(struct drm_device *dev,
struct omap_dss_device *output,
struct omap_dss_device *display)
{
struct drm_encoder *encoder = NULL;
struct omap_encoder *omap_encoder;
omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
if (!omap_encoder)
goto fail;
omap_encoder->output = output;
omap_encoder->display = display;
encoder = &omap_encoder->base;
drm_encoder_init(dev, encoder, &omap_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
return encoder;
fail:
if (encoder)
omap_encoder_destroy(encoder);
return NULL;
}
|
