2 * R-Car Display Unit HDMI Encoder
4 * Copyright (C) 2014 Renesas Electronics Corporation
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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.
14 #include <linux/slab.h>
17 #include <drm/drm_crtc.h>
18 #include <drm/drm_crtc_helper.h>
19 #include <drm/drm_encoder_slave.h>
21 #include "rcar_du_drv.h"
22 #include "rcar_du_encoder.h"
23 #include "rcar_du_hdmienc.h"
24 #include "rcar_du_lvdsenc.h"
26 struct rcar_du_hdmienc {
27 struct rcar_du_encoder *renc;
32 #define to_rcar_hdmienc(e) (to_rcar_encoder(e)->hdmi)
33 #define to_slave_funcs(e) (to_rcar_encoder(e)->slave.slave_funcs)
35 static void rcar_du_hdmienc_disable(struct drm_encoder *encoder)
37 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
38 const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
41 sfuncs->dpms(encoder, DRM_MODE_DPMS_OFF);
43 if (hdmienc->renc->lvds)
44 rcar_du_lvdsenc_enable(hdmienc->renc->lvds, encoder->crtc,
47 hdmienc->enabled = false;
50 static void rcar_du_hdmienc_enable(struct drm_encoder *encoder)
52 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
53 const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
55 if (hdmienc->renc->lvds)
56 rcar_du_lvdsenc_enable(hdmienc->renc->lvds, encoder->crtc,
60 sfuncs->dpms(encoder, DRM_MODE_DPMS_ON);
62 hdmienc->enabled = true;
65 static int rcar_du_hdmienc_atomic_check(struct drm_encoder *encoder,
66 struct drm_crtc_state *crtc_state,
67 struct drm_connector_state *conn_state)
69 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
70 const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
71 struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
72 const struct drm_display_mode *mode = &crtc_state->mode;
74 if (hdmienc->renc->lvds)
75 rcar_du_lvdsenc_atomic_check(hdmienc->renc->lvds,
78 if (sfuncs->mode_fixup == NULL)
81 return sfuncs->mode_fixup(encoder, mode, adjusted_mode) ? 0 : -EINVAL;
84 static void rcar_du_hdmienc_mode_set(struct drm_encoder *encoder,
85 struct drm_display_mode *mode,
86 struct drm_display_mode *adjusted_mode)
88 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
89 const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
92 sfuncs->mode_set(encoder, mode, adjusted_mode);
94 rcar_du_crtc_route_output(encoder->crtc, hdmienc->renc->output);
97 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
98 .mode_set = rcar_du_hdmienc_mode_set,
99 .disable = rcar_du_hdmienc_disable,
100 .enable = rcar_du_hdmienc_enable,
101 .atomic_check = rcar_du_hdmienc_atomic_check,
104 static void rcar_du_hdmienc_cleanup(struct drm_encoder *encoder)
106 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
108 if (hdmienc->enabled)
109 rcar_du_hdmienc_disable(encoder);
111 drm_encoder_cleanup(encoder);
112 put_device(hdmienc->dev);
115 static const struct drm_encoder_funcs encoder_funcs = {
116 .destroy = rcar_du_hdmienc_cleanup,
119 int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
120 struct rcar_du_encoder *renc, struct device_node *np)
122 struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
123 struct drm_i2c_encoder_driver *driver;
124 struct i2c_client *i2c_slave;
125 struct rcar_du_hdmienc *hdmienc;
128 hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL);
132 /* Locate the slave I2C device and driver. */
133 i2c_slave = of_find_i2c_device_by_node(np);
134 if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) {
136 "can't get I2C slave for %s, deferring probe\n",
137 of_node_full_name(np));
138 return -EPROBE_DEFER;
141 hdmienc->dev = &i2c_slave->dev;
143 if (hdmienc->dev->driver == NULL) {
145 "I2C slave %s not probed yet, deferring probe\n",
146 dev_name(hdmienc->dev));
151 /* Initialize the slave encoder. */
152 driver = to_drm_i2c_encoder_driver(to_i2c_driver(hdmienc->dev->driver));
153 ret = driver->encoder_init(i2c_slave, rcdu->ddev, &renc->slave);
157 ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
158 DRM_MODE_ENCODER_TMDS, NULL);
162 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
164 renc->hdmi = hdmienc;
165 hdmienc->renc = renc;
170 put_device(hdmienc->dev);