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Commit | Line | Data |
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4bf8e196 | 1 | /* |
6978f123 | 2 | * rcar_du_encoder.c -- R-Car Display Unit Encoder |
4bf8e196 | 3 | * |
36d50464 | 4 | * Copyright (C) 2013-2014 Renesas Electronics Corporation |
4bf8e196 LP |
5 | * |
6 | * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
90374b5c LP |
14 | #include <linux/export.h> |
15 | ||
4bf8e196 LP |
16 | #include <drm/drmP.h> |
17 | #include <drm/drm_crtc.h> | |
18 | #include <drm/drm_crtc_helper.h> | |
19 | ||
20 | #include "rcar_du_drv.h" | |
6978f123 | 21 | #include "rcar_du_encoder.h" |
637e6194 LP |
22 | #include "rcar_du_hdmicon.h" |
23 | #include "rcar_du_hdmienc.h" | |
4bf8e196 | 24 | #include "rcar_du_kms.h" |
56c5dd00 | 25 | #include "rcar_du_lvdscon.h" |
90374b5c | 26 | #include "rcar_du_lvdsenc.h" |
6978f123 | 27 | #include "rcar_du_vgacon.h" |
4bf8e196 | 28 | |
6978f123 LP |
29 | /* ----------------------------------------------------------------------------- |
30 | * Common connector functions | |
31 | */ | |
32 | ||
33 | struct drm_encoder * | |
34 | rcar_du_connector_best_encoder(struct drm_connector *connector) | |
4bf8e196 | 35 | { |
6978f123 LP |
36 | struct rcar_du_connector *rcon = to_rcar_connector(connector); |
37 | ||
4b96b70c | 38 | return rcar_encoder_to_drm_encoder(rcon->encoder); |
4bf8e196 LP |
39 | } |
40 | ||
6978f123 LP |
41 | /* ----------------------------------------------------------------------------- |
42 | * Encoder | |
43 | */ | |
44 | ||
f6638b6a | 45 | static void rcar_du_encoder_disable(struct drm_encoder *encoder) |
6978f123 | 46 | { |
90374b5c LP |
47 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); |
48 | ||
49 | if (renc->lvds) | |
f6638b6a LP |
50 | rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false); |
51 | } | |
52 | ||
53 | static void rcar_du_encoder_enable(struct drm_encoder *encoder) | |
54 | { | |
55 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); | |
56 | ||
57 | if (renc->lvds) | |
58 | rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, true); | |
59 | } | |
60 | ||
ede7714f LP |
61 | static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder, |
62 | struct drm_crtc_state *crtc_state, | |
63 | struct drm_connector_state *conn_state) | |
4bf8e196 | 64 | { |
90374b5c | 65 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); |
ede7714f LP |
66 | struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; |
67 | const struct drm_display_mode *mode = &crtc_state->mode; | |
4bf8e196 | 68 | const struct drm_display_mode *panel_mode; |
ede7714f | 69 | struct drm_connector *connector = conn_state->connector; |
4bf8e196 | 70 | struct drm_device *dev = encoder->dev; |
4bf8e196 | 71 | |
6978f123 LP |
72 | /* DAC encoders have currently no restriction on the mode. */ |
73 | if (encoder->encoder_type == DRM_MODE_ENCODER_DAC) | |
ede7714f | 74 | return 0; |
4bf8e196 LP |
75 | |
76 | if (list_empty(&connector->modes)) { | |
ede7714f LP |
77 | dev_dbg(dev->dev, "encoder: empty modes list\n"); |
78 | return -EINVAL; | |
4bf8e196 LP |
79 | } |
80 | ||
81 | panel_mode = list_first_entry(&connector->modes, | |
82 | struct drm_display_mode, head); | |
83 | ||
84 | /* We're not allowed to modify the resolution. */ | |
85 | if (mode->hdisplay != panel_mode->hdisplay || | |
86 | mode->vdisplay != panel_mode->vdisplay) | |
ede7714f | 87 | return -EINVAL; |
4bf8e196 LP |
88 | |
89 | /* The flat panel mode is fixed, just copy it to the adjusted mode. */ | |
90 | drm_mode_copy(adjusted_mode, panel_mode); | |
91 | ||
90374b5c LP |
92 | /* The internal LVDS encoder has a clock frequency operating range of |
93 | * 30MHz to 150MHz. Clamp the clock accordingly. | |
94 | */ | |
95 | if (renc->lvds) | |
96 | adjusted_mode->clock = clamp(adjusted_mode->clock, | |
97 | 30000, 150000); | |
98 | ||
ede7714f | 99 | return 0; |
4bf8e196 LP |
100 | } |
101 | ||
6978f123 LP |
102 | static void rcar_du_encoder_mode_set(struct drm_encoder *encoder, |
103 | struct drm_display_mode *mode, | |
104 | struct drm_display_mode *adjusted_mode) | |
105 | { | |
106 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); | |
107 | ||
108 | rcar_du_crtc_route_output(encoder->crtc, renc->output); | |
109 | } | |
110 | ||
4bf8e196 | 111 | static const struct drm_encoder_helper_funcs encoder_helper_funcs = { |
4bf8e196 | 112 | .mode_set = rcar_du_encoder_mode_set, |
f6638b6a LP |
113 | .disable = rcar_du_encoder_disable, |
114 | .enable = rcar_du_encoder_enable, | |
ede7714f | 115 | .atomic_check = rcar_du_encoder_atomic_check, |
4bf8e196 LP |
116 | }; |
117 | ||
118 | static const struct drm_encoder_funcs encoder_funcs = { | |
119 | .destroy = drm_encoder_cleanup, | |
120 | }; | |
121 | ||
6978f123 | 122 | int rcar_du_encoder_init(struct rcar_du_device *rcdu, |
ef67a902 LP |
123 | enum rcar_du_encoder_type type, |
124 | enum rcar_du_output output, | |
3ea4d5ec LP |
125 | struct device_node *enc_node, |
126 | struct device_node *con_node) | |
4bf8e196 LP |
127 | { |
128 | struct rcar_du_encoder *renc; | |
4b96b70c | 129 | struct drm_encoder *encoder; |
ef67a902 | 130 | unsigned int encoder_type; |
4bf8e196 LP |
131 | int ret; |
132 | ||
133 | renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL); | |
134 | if (renc == NULL) | |
135 | return -ENOMEM; | |
136 | ||
137 | renc->output = output; | |
4b96b70c | 138 | encoder = rcar_encoder_to_drm_encoder(renc); |
4bf8e196 | 139 | |
90374b5c LP |
140 | switch (output) { |
141 | case RCAR_DU_OUTPUT_LVDS0: | |
142 | renc->lvds = rcdu->lvds[0]; | |
143 | break; | |
144 | ||
145 | case RCAR_DU_OUTPUT_LVDS1: | |
146 | renc->lvds = rcdu->lvds[1]; | |
147 | break; | |
148 | ||
149 | default: | |
150 | break; | |
151 | } | |
152 | ||
ef67a902 LP |
153 | switch (type) { |
154 | case RCAR_DU_ENCODER_VGA: | |
155 | encoder_type = DRM_MODE_ENCODER_DAC; | |
156 | break; | |
157 | case RCAR_DU_ENCODER_LVDS: | |
158 | encoder_type = DRM_MODE_ENCODER_LVDS; | |
159 | break; | |
637e6194 LP |
160 | case RCAR_DU_ENCODER_HDMI: |
161 | encoder_type = DRM_MODE_ENCODER_TMDS; | |
162 | break; | |
ef67a902 LP |
163 | case RCAR_DU_ENCODER_NONE: |
164 | default: | |
165 | /* No external encoder, use the internal encoder type. */ | |
166 | encoder_type = rcdu->info->routes[output].encoder_type; | |
167 | break; | |
168 | } | |
169 | ||
637e6194 | 170 | if (type == RCAR_DU_ENCODER_HDMI) { |
637e6194 LP |
171 | ret = rcar_du_hdmienc_init(rcdu, renc, enc_node); |
172 | if (ret < 0) | |
347d761c | 173 | goto done; |
637e6194 LP |
174 | } else { |
175 | ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs, | |
13a3d91f | 176 | encoder_type, NULL); |
637e6194 | 177 | if (ret < 0) |
347d761c | 178 | goto done; |
637e6194 LP |
179 | |
180 | drm_encoder_helper_add(encoder, &encoder_helper_funcs); | |
181 | } | |
4bf8e196 | 182 | |
ef67a902 | 183 | switch (encoder_type) { |
2378ad12 | 184 | case DRM_MODE_ENCODER_LVDS: |
347d761c LP |
185 | ret = rcar_du_lvds_connector_init(rcdu, renc, con_node); |
186 | break; | |
6978f123 | 187 | |
ef67a902 | 188 | case DRM_MODE_ENCODER_DAC: |
347d761c LP |
189 | ret = rcar_du_vga_connector_init(rcdu, renc); |
190 | break; | |
6978f123 | 191 | |
637e6194 | 192 | case DRM_MODE_ENCODER_TMDS: |
347d761c LP |
193 | ret = rcar_du_hdmi_connector_init(rcdu, renc); |
194 | break; | |
637e6194 | 195 | |
6978f123 | 196 | default: |
347d761c LP |
197 | ret = -EINVAL; |
198 | break; | |
6978f123 | 199 | } |
347d761c LP |
200 | |
201 | done: | |
202 | if (ret < 0) { | |
203 | if (encoder->name) | |
204 | encoder->funcs->destroy(encoder); | |
205 | devm_kfree(rcdu->dev, renc); | |
206 | } | |
207 | ||
208 | return ret; | |
4bf8e196 | 209 | } |