2014-03-31 03:55:38 +08:00
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/*
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* R-Car Display Unit HDMI Encoder
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*
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* Copyright (C) 2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/slab.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_encoder_slave.h>
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#include "rcar_du_drv.h"
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#include "rcar_du_encoder.h"
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#include "rcar_du_hdmienc.h"
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2014-10-26 06:14:27 +08:00
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#include "rcar_du_lvdsenc.h"
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2014-03-31 03:55:38 +08:00
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struct rcar_du_hdmienc {
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struct rcar_du_encoder *renc;
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struct device *dev;
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int dpms;
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};
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#define to_rcar_hdmienc(e) (to_rcar_encoder(e)->hdmi)
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#define to_slave_funcs(e) (to_rcar_encoder(e)->slave.slave_funcs)
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static void rcar_du_hdmienc_dpms(struct drm_encoder *encoder, int mode)
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{
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struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
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struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
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if (hdmienc->dpms == mode)
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return;
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2014-10-26 06:14:27 +08:00
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if (mode == DRM_MODE_DPMS_ON && hdmienc->renc->lvds)
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rcar_du_lvdsenc_dpms(hdmienc->renc->lvds, encoder->crtc, mode);
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2014-03-31 03:55:38 +08:00
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if (sfuncs->dpms)
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sfuncs->dpms(encoder, mode);
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2014-10-26 06:14:27 +08:00
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if (mode != DRM_MODE_DPMS_ON && hdmienc->renc->lvds)
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rcar_du_lvdsenc_dpms(hdmienc->renc->lvds, encoder->crtc, mode);
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2014-03-31 03:55:38 +08:00
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hdmienc->dpms = mode;
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}
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static bool rcar_du_hdmienc_mode_fixup(struct drm_encoder *encoder,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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2014-10-26 06:14:27 +08:00
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struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
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2014-03-31 03:55:38 +08:00
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struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
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2014-10-26 06:14:27 +08:00
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/* The internal LVDS encoder has a clock frequency operating range of
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* 30MHz to 150MHz. Clamp the clock accordingly.
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*/
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if (hdmienc->renc->lvds)
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adjusted_mode->clock = clamp(adjusted_mode->clock,
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30000, 150000);
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2014-03-31 03:55:38 +08:00
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if (sfuncs->mode_fixup == NULL)
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return true;
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return sfuncs->mode_fixup(encoder, mode, adjusted_mode);
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}
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static void rcar_du_hdmienc_mode_prepare(struct drm_encoder *encoder)
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{
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rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_OFF);
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}
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static void rcar_du_hdmienc_mode_commit(struct drm_encoder *encoder)
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{
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rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_ON);
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}
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static void rcar_du_hdmienc_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
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struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
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if (sfuncs->mode_set)
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sfuncs->mode_set(encoder, mode, adjusted_mode);
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rcar_du_crtc_route_output(encoder->crtc, hdmienc->renc->output);
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}
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static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
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.dpms = rcar_du_hdmienc_dpms,
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.mode_fixup = rcar_du_hdmienc_mode_fixup,
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.prepare = rcar_du_hdmienc_mode_prepare,
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.commit = rcar_du_hdmienc_mode_commit,
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.mode_set = rcar_du_hdmienc_mode_set,
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};
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static void rcar_du_hdmienc_cleanup(struct drm_encoder *encoder)
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{
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struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
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rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_OFF);
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drm_encoder_cleanup(encoder);
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put_device(hdmienc->dev);
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}
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static const struct drm_encoder_funcs encoder_funcs = {
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.destroy = rcar_du_hdmienc_cleanup,
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};
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int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
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struct rcar_du_encoder *renc, struct device_node *np)
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{
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struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
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struct drm_i2c_encoder_driver *driver;
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struct i2c_client *i2c_slave;
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struct rcar_du_hdmienc *hdmienc;
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int ret;
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hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL);
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if (hdmienc == NULL)
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return -ENOMEM;
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/* Locate the slave I2C device and driver. */
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i2c_slave = of_find_i2c_device_by_node(np);
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if (!i2c_slave || !i2c_get_clientdata(i2c_slave))
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return -EPROBE_DEFER;
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hdmienc->dev = &i2c_slave->dev;
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if (hdmienc->dev->driver == NULL) {
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ret = -EPROBE_DEFER;
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goto error;
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}
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/* Initialize the slave encoder. */
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driver = to_drm_i2c_encoder_driver(to_i2c_driver(hdmienc->dev->driver));
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ret = driver->encoder_init(i2c_slave, rcdu->ddev, &renc->slave);
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if (ret < 0)
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goto error;
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ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
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DRM_MODE_ENCODER_TMDS);
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if (ret < 0)
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goto error;
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drm_encoder_helper_add(encoder, &encoder_helper_funcs);
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renc->hdmi = hdmienc;
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hdmienc->renc = renc;
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return 0;
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error:
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put_device(hdmienc->dev);
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return ret;
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}
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