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
231
232
233
234
235
236
237
238
239
240
|
/*
* Xilinx DRM encoder driver for Xilinx
*
* Copyright (C) 2013 Xilinx, Inc.
*
* Author: Hyun Woo Kwon <hyunk@xilinx.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_encoder_slave.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include "xilinx_drm_drv.h"
#include "xilinx_drm_encoder.h"
struct xilinx_drm_encoder {
struct drm_encoder_slave slave;
struct device *dev;
int dpms;
};
#define to_xilinx_encoder(x) \
container_of(x, struct xilinx_drm_encoder, slave)
/* set encoder dpms */
static void xilinx_drm_encoder_dpms(struct drm_encoder *base_encoder, int dpms)
{
struct xilinx_drm_encoder *encoder;
struct drm_encoder_slave *encoder_slave;
const struct drm_encoder_slave_funcs *encoder_sfuncs;
encoder_slave = to_encoder_slave(base_encoder);
encoder_sfuncs = encoder_slave->slave_funcs;
encoder = to_xilinx_encoder(encoder_slave);
DRM_DEBUG_KMS("dpms: %d -> %d\n", encoder->dpms, dpms);
if (encoder->dpms == dpms)
return;
encoder->dpms = dpms;
if (encoder_sfuncs->dpms)
encoder_sfuncs->dpms(base_encoder, dpms);
}
/* adjust a mode if needed */
static bool
xilinx_drm_encoder_mode_fixup(struct drm_encoder *base_encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_encoder_slave *encoder_slave;
const struct drm_encoder_slave_funcs *encoder_sfuncs = NULL;
bool ret = true;
encoder_slave = to_encoder_slave(base_encoder);
encoder_sfuncs = encoder_slave->slave_funcs;
if (encoder_sfuncs->mode_fixup)
ret = encoder_sfuncs->mode_fixup(base_encoder, mode,
adjusted_mode);
return ret;
}
/* set mode to xilinx encoder */
static void xilinx_drm_encoder_mode_set(struct drm_encoder *base_encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_encoder_slave *encoder_slave;
const struct drm_encoder_slave_funcs *encoder_sfuncs;
DRM_DEBUG_KMS("h: %d, v: %d\n",
adjusted_mode->hdisplay, adjusted_mode->vdisplay);
DRM_DEBUG_KMS("refresh: %d, pclock: %d khz\n",
adjusted_mode->vrefresh, adjusted_mode->clock);
encoder_slave = to_encoder_slave(base_encoder);
encoder_sfuncs = encoder_slave->slave_funcs;
if (encoder_sfuncs->mode_set)
encoder_sfuncs->mode_set(base_encoder, mode, adjusted_mode);
}
/* apply mode to encoder pipe */
static void xilinx_drm_encoder_commit(struct drm_encoder *base_encoder)
{
/* start encoder with new mode */
xilinx_drm_encoder_dpms(base_encoder, DRM_MODE_DPMS_ON);
}
/* prepare encoder */
static void xilinx_drm_encoder_prepare(struct drm_encoder *base_encoder)
{
xilinx_drm_encoder_dpms(base_encoder, DRM_MODE_DPMS_OFF);
}
/* get crtc */
static struct drm_crtc *
xilinx_drm_encoder_get_crtc(struct drm_encoder *base_encoder)
{
return base_encoder->crtc;
}
static const struct drm_encoder_helper_funcs xilinx_drm_encoder_helper_funcs = {
.dpms = xilinx_drm_encoder_dpms,
.mode_fixup = xilinx_drm_encoder_mode_fixup,
.mode_set = xilinx_drm_encoder_mode_set,
.prepare = xilinx_drm_encoder_prepare,
.commit = xilinx_drm_encoder_commit,
.get_crtc = xilinx_drm_encoder_get_crtc,
};
/* destroy encoder */
void xilinx_drm_encoder_destroy(struct drm_encoder *base_encoder)
{
struct xilinx_drm_encoder *encoder;
struct drm_encoder_slave *encoder_slave;
encoder_slave = to_encoder_slave(base_encoder);
encoder = to_xilinx_encoder(encoder_slave);
/* make sure encoder is off */
xilinx_drm_encoder_dpms(base_encoder, DRM_MODE_DPMS_OFF);
drm_encoder_cleanup(base_encoder);
put_device(encoder->dev);
}
static const struct drm_encoder_funcs xilinx_drm_encoder_funcs = {
.destroy = xilinx_drm_encoder_destroy,
};
/* create encoder */
struct drm_encoder *xilinx_drm_encoder_create(struct drm_device *drm,
struct device_node *node)
{
struct xilinx_drm_encoder *encoder;
struct i2c_client *i2c_slv;
struct i2c_driver *i2c_driver;
struct drm_i2c_encoder_driver *drm_i2c_driver;
struct device_driver *device_driver;
struct platform_device *platform_slv;
struct platform_driver *platform_driver;
struct drm_platform_encoder_driver *drm_platform_driver;
int ret = 0;
encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
if (!encoder)
return ERR_PTR(-ENOMEM);
encoder->dpms = DRM_MODE_DPMS_OFF;
/* FIXME: Use DT to figure out crtcs / clones */
encoder->slave.base.possible_crtcs = 1;
encoder->slave.base.possible_clones = ~0;
ret = drm_encoder_init(drm, &encoder->slave.base,
&xilinx_drm_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret) {
DRM_ERROR("failed to initialize drm encoder\n");
return ERR_PTR(ret);
}
drm_encoder_helper_add(&encoder->slave.base,
&xilinx_drm_encoder_helper_funcs);
/* initialize slave encoder */
i2c_slv = of_find_i2c_device_by_node(node);
if (i2c_slv && i2c_slv->dev.driver) {
i2c_driver = to_i2c_driver(i2c_slv->dev.driver);
drm_i2c_driver = to_drm_i2c_encoder_driver(i2c_driver);
if (!drm_i2c_driver || !drm_i2c_driver->encoder_init) {
DRM_DEBUG_KMS("failed to initialize i2c slave\n");
ret = -EPROBE_DEFER;
goto err_out;
}
encoder->dev = &i2c_slv->dev;
ret = drm_i2c_driver->encoder_init(i2c_slv, drm,
&encoder->slave);
} else {
platform_slv = of_find_device_by_node(node);
if (!platform_slv) {
DRM_DEBUG_KMS("failed to get an encoder slv\n");
return ERR_PTR(-EPROBE_DEFER);
}
device_driver = platform_slv->dev.driver;
if (!device_driver) {
DRM_DEBUG_KMS("failed to get device driver\n");
return ERR_PTR(-EPROBE_DEFER);
}
platform_driver = to_platform_driver(device_driver);
drm_platform_driver =
to_drm_platform_encoder_driver(platform_driver);
if (!drm_platform_driver ||
!drm_platform_driver->encoder_init) {
DRM_DEBUG_KMS("failed to initialize platform slave\n");
ret = -EPROBE_DEFER;
goto err_out;
}
encoder->dev = &platform_slv->dev;
ret = drm_platform_driver->encoder_init(platform_slv, drm,
&encoder->slave);
}
if (ret) {
DRM_ERROR("failed to initialize encoder slave\n");
goto err_out;
}
if (!encoder->slave.slave_funcs) {
DRM_ERROR("there's no encoder slave function\n");
ret = -ENODEV;
goto err_out;
}
return &encoder->slave.base;
err_out:
return ERR_PTR(ret);
}
|
