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cd5351f4 RC |
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 | ||
f5f9454c RC |
25 | #include <linux/list.h> |
26 | ||
27 | ||
cd5351f4 RC |
28 | /* |
29 | * encoder funcs | |
30 | */ | |
31 | ||
32 | #define to_omap_encoder(x) container_of(x, struct omap_encoder, base) | |
33 | ||
f5f9454c RC |
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 | */ | |
cd5351f4 RC |
39 | struct omap_encoder { |
40 | struct drm_encoder base; | |
f5f9454c | 41 | struct omap_dss_device *dssdev; |
cd5351f4 RC |
42 | }; |
43 | ||
44 | static void omap_encoder_destroy(struct drm_encoder *encoder) | |
45 | { | |
46 | struct omap_encoder *omap_encoder = to_omap_encoder(encoder); | |
cd5351f4 RC |
47 | drm_encoder_cleanup(encoder); |
48 | kfree(omap_encoder); | |
49 | } | |
50 | ||
f5f9454c RC |
51 | static const struct drm_encoder_funcs omap_encoder_funcs = { |
52 | .destroy = omap_encoder_destroy, | |
53 | }; | |
54 | ||
55 | /* | |
56 | * The CRTC drm_crtc_helper_set_mode() doesn't really give us the right | |
57 | * order.. the easiest way to work around this for now is to make all | |
58 | * the encoder-helper's no-op's and have the omap_crtc code take care | |
59 | * of the sequencing and call us in the right points. | |
60 | * | |
61 | * Eventually to handle connecting CRTCs to different encoders properly, | |
62 | * either the CRTC helpers need to change or we need to replace | |
63 | * drm_crtc_helper_set_mode(), but lets wait until atomic-modeset for | |
64 | * that. | |
65 | */ | |
66 | ||
cd5351f4 RC |
67 | static void omap_encoder_dpms(struct drm_encoder *encoder, int mode) |
68 | { | |
cd5351f4 RC |
69 | } |
70 | ||
71 | static bool omap_encoder_mode_fixup(struct drm_encoder *encoder, | |
e811f5ae | 72 | const struct drm_display_mode *mode, |
cd5351f4 RC |
73 | struct drm_display_mode *adjusted_mode) |
74 | { | |
cd5351f4 RC |
75 | return true; |
76 | } | |
77 | ||
78 | static void omap_encoder_mode_set(struct drm_encoder *encoder, | |
79 | struct drm_display_mode *mode, | |
80 | struct drm_display_mode *adjusted_mode) | |
81 | { | |
cd5351f4 RC |
82 | } |
83 | ||
84 | static void omap_encoder_prepare(struct drm_encoder *encoder) | |
85 | { | |
cd5351f4 RC |
86 | } |
87 | ||
88 | static void omap_encoder_commit(struct drm_encoder *encoder) | |
89 | { | |
cd5351f4 RC |
90 | } |
91 | ||
cd5351f4 RC |
92 | static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = { |
93 | .dpms = omap_encoder_dpms, | |
94 | .mode_fixup = omap_encoder_mode_fixup, | |
95 | .mode_set = omap_encoder_mode_set, | |
96 | .prepare = omap_encoder_prepare, | |
97 | .commit = omap_encoder_commit, | |
98 | }; | |
99 | ||
f5f9454c RC |
100 | /* |
101 | * Instead of relying on the helpers for modeset, the omap_crtc code | |
102 | * calls these functions in the proper sequence. | |
103 | */ | |
104 | ||
105 | int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled) | |
cd5351f4 RC |
106 | { |
107 | struct omap_encoder *omap_encoder = to_omap_encoder(encoder); | |
f5f9454c RC |
108 | struct omap_dss_device *dssdev = omap_encoder->dssdev; |
109 | struct omap_dss_driver *dssdrv = dssdev->driver; | |
110 | ||
111 | if (enabled) { | |
112 | return dssdrv->enable(dssdev); | |
113 | } else { | |
114 | dssdrv->disable(dssdev); | |
115 | return 0; | |
116 | } | |
117 | } | |
118 | ||
119 | int omap_encoder_update(struct drm_encoder *encoder, | |
120 | struct omap_overlay_manager *mgr, | |
121 | struct omap_video_timings *timings) | |
122 | { | |
123 | struct drm_device *dev = encoder->dev; | |
124 | struct omap_encoder *omap_encoder = to_omap_encoder(encoder); | |
125 | struct omap_dss_device *dssdev = omap_encoder->dssdev; | |
126 | struct omap_dss_driver *dssdrv = dssdev->driver; | |
127 | int ret; | |
128 | ||
129 | dssdev->output->manager = mgr; | |
130 | ||
131 | ret = dssdrv->check_timings(dssdev, timings); | |
132 | if (ret) { | |
133 | dev_err(dev->dev, "could not set timings: %d\n", ret); | |
134 | return ret; | |
135 | } | |
136 | ||
137 | dssdrv->set_timings(dssdev, timings); | |
138 | ||
139 | return 0; | |
cd5351f4 RC |
140 | } |
141 | ||
142 | /* initialize encoder */ | |
143 | struct drm_encoder *omap_encoder_init(struct drm_device *dev, | |
f5f9454c | 144 | struct omap_dss_device *dssdev) |
cd5351f4 RC |
145 | { |
146 | struct drm_encoder *encoder = NULL; | |
147 | struct omap_encoder *omap_encoder; | |
cd5351f4 RC |
148 | |
149 | omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL); | |
150 | if (!omap_encoder) { | |
151 | dev_err(dev->dev, "could not allocate encoder\n"); | |
152 | goto fail; | |
153 | } | |
154 | ||
f5f9454c RC |
155 | omap_encoder->dssdev = dssdev; |
156 | ||
cd5351f4 RC |
157 | encoder = &omap_encoder->base; |
158 | ||
159 | drm_encoder_init(dev, encoder, &omap_encoder_funcs, | |
160 | DRM_MODE_ENCODER_TMDS); | |
161 | drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs); | |
162 | ||
cd5351f4 RC |
163 | return encoder; |
164 | ||
165 | fail: | |
582bc28c | 166 | if (encoder) |
65b0bd06 | 167 | omap_encoder_destroy(encoder); |
cd5351f4 RC |
168 | |
169 | return NULL; | |
170 | } |