Loading...
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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7#include <linux/list.h>
8
9#include <drm/drm_bridge.h>
10#include <drm/drm_crtc.h>
11#include <drm/drm_modeset_helper_vtables.h>
12#include <drm/drm_edid.h>
13
14#include "omap_drv.h"
15
16/*
17 * encoder funcs
18 */
19
20#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
21
22/* The encoder and connector both map to same dssdev.. the encoder
23 * handles the 'active' parts, ie. anything the modifies the state
24 * of the hw, and the connector handles the 'read-only' parts, like
25 * detecting connection and reading edid.
26 */
27struct omap_encoder {
28 struct drm_encoder base;
29 struct omap_dss_device *output;
30};
31
32static void omap_encoder_destroy(struct drm_encoder *encoder)
33{
34 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
35
36 drm_encoder_cleanup(encoder);
37 kfree(omap_encoder);
38}
39
40static const struct drm_encoder_funcs omap_encoder_funcs = {
41 .destroy = omap_encoder_destroy,
42};
43
44static void omap_encoder_update_videomode_flags(struct videomode *vm,
45 u32 bus_flags)
46{
47 if (!(vm->flags & (DISPLAY_FLAGS_DE_LOW |
48 DISPLAY_FLAGS_DE_HIGH))) {
49 if (bus_flags & DRM_BUS_FLAG_DE_LOW)
50 vm->flags |= DISPLAY_FLAGS_DE_LOW;
51 else if (bus_flags & DRM_BUS_FLAG_DE_HIGH)
52 vm->flags |= DISPLAY_FLAGS_DE_HIGH;
53 }
54
55 if (!(vm->flags & (DISPLAY_FLAGS_PIXDATA_POSEDGE |
56 DISPLAY_FLAGS_PIXDATA_NEGEDGE))) {
57 if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
58 vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
59 else if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
60 vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
61 }
62
63 if (!(vm->flags & (DISPLAY_FLAGS_SYNC_POSEDGE |
64 DISPLAY_FLAGS_SYNC_NEGEDGE))) {
65 if (bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE)
66 vm->flags |= DISPLAY_FLAGS_SYNC_POSEDGE;
67 else if (bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE)
68 vm->flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
69 }
70}
71
72static void omap_encoder_mode_set(struct drm_encoder *encoder,
73 struct drm_display_mode *mode,
74 struct drm_display_mode *adjusted_mode)
75{
76 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
77 struct omap_dss_device *output = omap_encoder->output;
78 struct drm_device *dev = encoder->dev;
79 struct drm_connector *connector;
80 struct drm_bridge *bridge;
81 struct videomode vm = { 0 };
82 u32 bus_flags;
83
84 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
85 if (connector->encoder == encoder)
86 break;
87 }
88
89 drm_display_mode_to_videomode(adjusted_mode, &vm);
90
91 /*
92 * HACK: This fixes the vm flags.
93 * struct drm_display_mode does not contain the VSYNC/HSYNC/DE flags and
94 * they get lost when converting back and forth between struct
95 * drm_display_mode and struct videomode. The hack below goes and
96 * fetches the missing flags.
97 *
98 * A better solution is to use DRM's bus-flags through the whole driver.
99 */
100 for (bridge = output->bridge; bridge;
101 bridge = drm_bridge_get_next_bridge(bridge)) {
102 if (!bridge->timings)
103 continue;
104
105 bus_flags = bridge->timings->input_bus_flags;
106 omap_encoder_update_videomode_flags(&vm, bus_flags);
107 }
108
109 bus_flags = connector->display_info.bus_flags;
110 omap_encoder_update_videomode_flags(&vm, bus_flags);
111
112 /* Set timings for all devices in the display pipeline. */
113 dss_mgr_set_timings(output, &vm);
114}
115
116static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
117 .mode_set = omap_encoder_mode_set,
118};
119
120/* initialize encoder */
121struct drm_encoder *omap_encoder_init(struct drm_device *dev,
122 struct omap_dss_device *output)
123{
124 struct drm_encoder *encoder = NULL;
125 struct omap_encoder *omap_encoder;
126
127 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
128 if (!omap_encoder)
129 goto fail;
130
131 omap_encoder->output = output;
132
133 encoder = &omap_encoder->base;
134
135 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
136 DRM_MODE_ENCODER_TMDS, NULL);
137 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
138
139 return encoder;
140
141fail:
142 if (encoder)
143 omap_encoder_destroy(encoder);
144
145 return NULL;
146}