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1/*
2 * rcar_du_encoder.c -- R-Car Display Unit Encoder
3 *
4 * Copyright (C) 2013-2014 Renesas Electronics Corporation
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
14#include <linux/export.h>
15
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"
21#include "rcar_du_encoder.h"
22#include "rcar_du_hdmicon.h"
23#include "rcar_du_hdmienc.h"
24#include "rcar_du_kms.h"
25#include "rcar_du_lvdscon.h"
26#include "rcar_du_lvdsenc.h"
27#include "rcar_du_vgacon.h"
28
29/* -----------------------------------------------------------------------------
30 * Common connector functions
31 */
32
33struct drm_encoder *
34rcar_du_connector_best_encoder(struct drm_connector *connector)
35{
36 struct rcar_du_connector *rcon = to_rcar_connector(connector);
37
38 return rcar_encoder_to_drm_encoder(rcon->encoder);
39}
40
41/* -----------------------------------------------------------------------------
42 * Encoder
43 */
44
45static void rcar_du_encoder_disable(struct drm_encoder *encoder)
46{
47 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
48
49 if (renc->lvds)
50 rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false);
51}
52
53static 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
61static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder,
62 struct drm_crtc_state *crtc_state,
63 struct drm_connector_state *conn_state)
64{
65 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
66 struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
67 const struct drm_display_mode *mode = &crtc_state->mode;
68 const struct drm_display_mode *panel_mode;
69 struct drm_connector *connector = conn_state->connector;
70 struct drm_device *dev = encoder->dev;
71
72 /* DAC encoders have currently no restriction on the mode. */
73 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
74 return 0;
75
76 if (list_empty(&connector->modes)) {
77 dev_dbg(dev->dev, "encoder: empty modes list\n");
78 return -EINVAL;
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)
87 return -EINVAL;
88
89 /* The flat panel mode is fixed, just copy it to the adjusted mode. */
90 drm_mode_copy(adjusted_mode, panel_mode);
91
92 if (renc->lvds)
93 rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
94
95 return 0;
96}
97
98static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
99 struct drm_display_mode *mode,
100 struct drm_display_mode *adjusted_mode)
101{
102 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
103
104 rcar_du_crtc_route_output(encoder->crtc, renc->output);
105}
106
107static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
108 .mode_set = rcar_du_encoder_mode_set,
109 .disable = rcar_du_encoder_disable,
110 .enable = rcar_du_encoder_enable,
111 .atomic_check = rcar_du_encoder_atomic_check,
112};
113
114static const struct drm_encoder_funcs encoder_funcs = {
115 .destroy = drm_encoder_cleanup,
116};
117
118int rcar_du_encoder_init(struct rcar_du_device *rcdu,
119 enum rcar_du_encoder_type type,
120 enum rcar_du_output output,
121 struct device_node *enc_node,
122 struct device_node *con_node)
123{
124 struct rcar_du_encoder *renc;
125 struct drm_encoder *encoder;
126 unsigned int encoder_type;
127 int ret;
128
129 renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
130 if (renc == NULL)
131 return -ENOMEM;
132
133 renc->output = output;
134 encoder = rcar_encoder_to_drm_encoder(renc);
135
136 switch (output) {
137 case RCAR_DU_OUTPUT_LVDS0:
138 renc->lvds = rcdu->lvds[0];
139 break;
140
141 case RCAR_DU_OUTPUT_LVDS1:
142 renc->lvds = rcdu->lvds[1];
143 break;
144
145 default:
146 break;
147 }
148
149 switch (type) {
150 case RCAR_DU_ENCODER_VGA:
151 encoder_type = DRM_MODE_ENCODER_DAC;
152 break;
153 case RCAR_DU_ENCODER_LVDS:
154 encoder_type = DRM_MODE_ENCODER_LVDS;
155 break;
156 case RCAR_DU_ENCODER_HDMI:
157 encoder_type = DRM_MODE_ENCODER_TMDS;
158 break;
159 case RCAR_DU_ENCODER_NONE:
160 default:
161 /* No external encoder, use the internal encoder type. */
162 encoder_type = rcdu->info->routes[output].encoder_type;
163 break;
164 }
165
166 if (type == RCAR_DU_ENCODER_HDMI) {
167 ret = rcar_du_hdmienc_init(rcdu, renc, enc_node);
168 if (ret < 0)
169 goto done;
170 } else {
171 ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
172 encoder_type, NULL);
173 if (ret < 0)
174 goto done;
175
176 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
177 }
178
179 switch (encoder_type) {
180 case DRM_MODE_ENCODER_LVDS:
181 ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
182 break;
183
184 case DRM_MODE_ENCODER_DAC:
185 ret = rcar_du_vga_connector_init(rcdu, renc);
186 break;
187
188 case DRM_MODE_ENCODER_TMDS:
189 ret = rcar_du_hdmi_connector_init(rcdu, renc);
190 break;
191
192 default:
193 ret = -EINVAL;
194 break;
195 }
196
197done:
198 if (ret < 0) {
199 if (encoder->name)
200 encoder->funcs->destroy(encoder);
201 devm_kfree(rcdu->dev, renc);
202 }
203
204 return ret;
205}
1/*
2 * rcar_du_encoder.c -- R-Car Display Unit Encoder
3 *
4 * Copyright (C) 2013 Renesas Corporation
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
14#include <linux/export.h>
15
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"
21#include "rcar_du_encoder.h"
22#include "rcar_du_kms.h"
23#include "rcar_du_lvdscon.h"
24#include "rcar_du_lvdsenc.h"
25#include "rcar_du_vgacon.h"
26
27/* -----------------------------------------------------------------------------
28 * Common connector functions
29 */
30
31struct drm_encoder *
32rcar_du_connector_best_encoder(struct drm_connector *connector)
33{
34 struct rcar_du_connector *rcon = to_rcar_connector(connector);
35
36 return &rcon->encoder->encoder;
37}
38
39/* -----------------------------------------------------------------------------
40 * Encoder
41 */
42
43static void rcar_du_encoder_dpms(struct drm_encoder *encoder, int mode)
44{
45 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
46
47 if (renc->lvds)
48 rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc, mode);
49}
50
51static bool rcar_du_encoder_mode_fixup(struct drm_encoder *encoder,
52 const struct drm_display_mode *mode,
53 struct drm_display_mode *adjusted_mode)
54{
55 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
56 const struct drm_display_mode *panel_mode;
57 struct drm_device *dev = encoder->dev;
58 struct drm_connector *connector;
59 bool found = false;
60
61 /* DAC encoders have currently no restriction on the mode. */
62 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
63 return true;
64
65 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
66 if (connector->encoder == encoder) {
67 found = true;
68 break;
69 }
70 }
71
72 if (!found) {
73 dev_dbg(dev->dev, "mode_fixup: no connector found\n");
74 return false;
75 }
76
77 if (list_empty(&connector->modes)) {
78 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
79 return false;
80 }
81
82 panel_mode = list_first_entry(&connector->modes,
83 struct drm_display_mode, head);
84
85 /* We're not allowed to modify the resolution. */
86 if (mode->hdisplay != panel_mode->hdisplay ||
87 mode->vdisplay != panel_mode->vdisplay)
88 return false;
89
90 /* The flat panel mode is fixed, just copy it to the adjusted mode. */
91 drm_mode_copy(adjusted_mode, panel_mode);
92
93 /* The internal LVDS encoder has a clock frequency operating range of
94 * 30MHz to 150MHz. Clamp the clock accordingly.
95 */
96 if (renc->lvds)
97 adjusted_mode->clock = clamp(adjusted_mode->clock,
98 30000, 150000);
99
100 return true;
101}
102
103static void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder)
104{
105 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
106
107 if (renc->lvds)
108 rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc,
109 DRM_MODE_DPMS_OFF);
110}
111
112static void rcar_du_encoder_mode_commit(struct drm_encoder *encoder)
113{
114 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
115
116 if (renc->lvds)
117 rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc,
118 DRM_MODE_DPMS_ON);
119}
120
121static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
122 struct drm_display_mode *mode,
123 struct drm_display_mode *adjusted_mode)
124{
125 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
126
127 rcar_du_crtc_route_output(encoder->crtc, renc->output);
128}
129
130static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
131 .dpms = rcar_du_encoder_dpms,
132 .mode_fixup = rcar_du_encoder_mode_fixup,
133 .prepare = rcar_du_encoder_mode_prepare,
134 .commit = rcar_du_encoder_mode_commit,
135 .mode_set = rcar_du_encoder_mode_set,
136};
137
138static const struct drm_encoder_funcs encoder_funcs = {
139 .destroy = drm_encoder_cleanup,
140};
141
142int rcar_du_encoder_init(struct rcar_du_device *rcdu,
143 enum rcar_du_encoder_type type,
144 enum rcar_du_output output,
145 const struct rcar_du_encoder_data *data)
146{
147 struct rcar_du_encoder *renc;
148 unsigned int encoder_type;
149 int ret;
150
151 renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
152 if (renc == NULL)
153 return -ENOMEM;
154
155 renc->output = output;
156
157 switch (output) {
158 case RCAR_DU_OUTPUT_LVDS0:
159 renc->lvds = rcdu->lvds[0];
160 break;
161
162 case RCAR_DU_OUTPUT_LVDS1:
163 renc->lvds = rcdu->lvds[1];
164 break;
165
166 default:
167 break;
168 }
169
170 switch (type) {
171 case RCAR_DU_ENCODER_VGA:
172 encoder_type = DRM_MODE_ENCODER_DAC;
173 break;
174 case RCAR_DU_ENCODER_LVDS:
175 encoder_type = DRM_MODE_ENCODER_LVDS;
176 break;
177 case RCAR_DU_ENCODER_NONE:
178 default:
179 /* No external encoder, use the internal encoder type. */
180 encoder_type = rcdu->info->routes[output].encoder_type;
181 break;
182 }
183
184 ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
185 encoder_type);
186 if (ret < 0)
187 return ret;
188
189 drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
190
191 switch (encoder_type) {
192 case DRM_MODE_ENCODER_LVDS:
193 return rcar_du_lvds_connector_init(rcdu, renc,
194 &data->connector.lvds.panel);
195
196 case DRM_MODE_ENCODER_DAC:
197 return rcar_du_vga_connector_init(rcdu, renc);
198
199 default:
200 return -EINVAL;
201 }
202}