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_dpms(struct drm_encoder *encoder, int mode)
37 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
38 struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
40 if (hdmienc->dpms == mode)
43 if (mode == DRM_MODE_DPMS_ON && hdmienc->renc->lvds)
44 rcar_du_lvdsenc_dpms(hdmienc->renc->lvds, encoder->crtc, mode);
47 sfuncs->dpms(encoder, mode);
49 if (mode != DRM_MODE_DPMS_ON && hdmienc->renc->lvds)
50 rcar_du_lvdsenc_dpms(hdmienc->renc->lvds, encoder->crtc, mode);
55 static bool rcar_du_hdmienc_mode_fixup(struct drm_encoder *encoder,
56 const struct drm_display_mode *mode,
57 struct drm_display_mode *adjusted_mode)
59 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
60 struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
62 /* The internal LVDS encoder has a clock frequency operating range of
63 * 30MHz to 150MHz. Clamp the clock accordingly.
65 if (hdmienc->renc->lvds)
66 adjusted_mode->clock = clamp(adjusted_mode->clock,
69 if (sfuncs->mode_fixup == NULL)
72 return sfuncs->mode_fixup(encoder, mode, adjusted_mode);
75 static void rcar_du_hdmienc_mode_prepare(struct drm_encoder *encoder)
77 rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_OFF);
80 static void rcar_du_hdmienc_mode_commit(struct drm_encoder *encoder)
82 rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_ON);
85 static void rcar_du_hdmienc_mode_set(struct drm_encoder *encoder,
86 struct drm_display_mode *mode,
87 struct drm_display_mode *adjusted_mode)
89 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
90 struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
93 sfuncs->mode_set(encoder, mode, adjusted_mode);
95 rcar_du_crtc_route_output(encoder->crtc, hdmienc->renc->output);
98 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
99 .dpms = rcar_du_hdmienc_dpms,
100 .mode_fixup = rcar_du_hdmienc_mode_fixup,
101 .prepare = rcar_du_hdmienc_mode_prepare,
102 .commit = rcar_du_hdmienc_mode_commit,
103 .mode_set = rcar_du_hdmienc_mode_set,
106 static void rcar_du_hdmienc_cleanup(struct drm_encoder *encoder)
108 struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
110 rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_OFF);
112 drm_encoder_cleanup(encoder);
113 put_device(hdmienc->dev);
116 static const struct drm_encoder_funcs encoder_funcs = {
117 .destroy = rcar_du_hdmienc_cleanup,
120 int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
121 struct rcar_du_encoder *renc, struct device_node *np)
123 struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
124 struct drm_i2c_encoder_driver *driver;
125 struct i2c_client *i2c_slave;
126 struct rcar_du_hdmienc *hdmienc;
129 hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL);
133 /* Locate the slave I2C device and driver. */
134 i2c_slave = of_find_i2c_device_by_node(np);
135 if (!i2c_slave || !i2c_get_clientdata(i2c_slave))
136 return -EPROBE_DEFER;
138 hdmienc->dev = &i2c_slave->dev;
140 if (hdmienc->dev->driver == NULL) {
145 /* Initialize the slave encoder. */
146 driver = to_drm_i2c_encoder_driver(to_i2c_driver(hdmienc->dev->driver));
147 ret = driver->encoder_init(i2c_slave, rcdu->ddev, &renc->slave);
151 ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
152 DRM_MODE_ENCODER_TMDS);
156 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
158 renc->hdmi = hdmienc;
159 hdmienc->renc = renc;
164 put_device(hdmienc->dev);