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![Boris Brezillon](/assets/img/avatar_default.png)
We have a 1:1 relationship between connectors and encoders and the driver is relying on the atomic helpers: we can drop the custom ->best_encoder(), and let the core call drm_atomic_helper_best_encoder() for us. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465300095-16971-3-git-send-email-boris.brezillon@free-electrons.com
183 lines
5.2 KiB
C
183 lines
5.2 KiB
C
/*
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* ARC PGU DRM driver.
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*
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* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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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 <drm/drm_atomic_helper.h>
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#include "arcpgu.h"
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struct arcpgu_drm_connector {
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struct drm_connector connector;
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struct drm_encoder_slave *encoder_slave;
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};
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static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
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{
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const struct drm_encoder_slave_funcs *sfuncs;
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struct drm_encoder_slave *slave;
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struct arcpgu_drm_connector *con =
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container_of(connector, struct arcpgu_drm_connector, connector);
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slave = con->encoder_slave;
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if (slave == NULL) {
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dev_err(connector->dev->dev,
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"connector_get_modes: cannot find slave encoder for connector\n");
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return 0;
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}
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sfuncs = slave->slave_funcs;
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if (sfuncs->get_modes == NULL)
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return 0;
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return sfuncs->get_modes(&slave->base, connector);
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}
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static enum drm_connector_status
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arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
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{
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enum drm_connector_status status = connector_status_unknown;
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const struct drm_encoder_slave_funcs *sfuncs;
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struct drm_encoder_slave *slave;
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struct arcpgu_drm_connector *con =
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container_of(connector, struct arcpgu_drm_connector, connector);
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slave = con->encoder_slave;
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if (slave == NULL) {
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dev_err(connector->dev->dev,
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"connector_detect: cannot find slave encoder for connector\n");
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return status;
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}
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sfuncs = slave->slave_funcs;
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if (sfuncs && sfuncs->detect)
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return sfuncs->detect(&slave->base, connector);
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dev_err(connector->dev->dev, "connector_detect: could not detect slave funcs\n");
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return status;
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}
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static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_helper_funcs
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arcpgu_drm_connector_helper_funcs = {
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.get_modes = arcpgu_drm_connector_get_modes,
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};
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static const struct drm_connector_funcs arcpgu_drm_connector_funcs = {
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.dpms = drm_helper_connector_dpms,
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.reset = drm_atomic_helper_connector_reset,
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.detect = arcpgu_drm_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = arcpgu_drm_connector_destroy,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static struct drm_encoder_helper_funcs arcpgu_drm_encoder_helper_funcs = {
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.dpms = drm_i2c_encoder_dpms,
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.mode_fixup = drm_i2c_encoder_mode_fixup,
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.mode_set = drm_i2c_encoder_mode_set,
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.prepare = drm_i2c_encoder_prepare,
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.commit = drm_i2c_encoder_commit,
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.detect = drm_i2c_encoder_detect,
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};
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static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
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{
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struct arcpgu_drm_connector *arcpgu_connector;
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struct drm_i2c_encoder_driver *driver;
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struct drm_encoder_slave *encoder;
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struct drm_connector *connector;
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struct i2c_client *i2c_slave;
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int ret;
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encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
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if (encoder == NULL)
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return -ENOMEM;
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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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dev_err(drm->dev, "failed to find i2c slave encoder\n");
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return -EPROBE_DEFER;
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}
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if (i2c_slave->dev.driver == NULL) {
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dev_err(drm->dev, "failed to find i2c slave driver\n");
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return -EPROBE_DEFER;
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}
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driver =
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to_drm_i2c_encoder_driver(to_i2c_driver(i2c_slave->dev.driver));
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ret = driver->encoder_init(i2c_slave, drm, encoder);
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if (ret) {
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dev_err(drm->dev, "failed to initialize i2c encoder slave\n");
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return ret;
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}
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encoder->base.possible_crtcs = 1;
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encoder->base.possible_clones = 0;
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ret = drm_encoder_init(drm, &encoder->base, &arcpgu_drm_encoder_funcs,
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DRM_MODE_ENCODER_TMDS, NULL);
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if (ret)
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return ret;
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drm_encoder_helper_add(&encoder->base,
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&arcpgu_drm_encoder_helper_funcs);
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arcpgu_connector = devm_kzalloc(drm->dev, sizeof(*arcpgu_connector),
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GFP_KERNEL);
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if (!arcpgu_connector) {
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ret = -ENOMEM;
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goto error_encoder_cleanup;
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}
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connector = &arcpgu_connector->connector;
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drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs);
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ret = drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs,
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DRM_MODE_CONNECTOR_HDMIA);
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if (ret < 0) {
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dev_err(drm->dev, "failed to initialize drm connector\n");
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goto error_encoder_cleanup;
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}
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ret = drm_mode_connector_attach_encoder(connector, &encoder->base);
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if (ret < 0) {
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dev_err(drm->dev, "could not attach connector to encoder\n");
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drm_connector_unregister(connector);
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goto error_connector_cleanup;
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}
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arcpgu_connector->encoder_slave = encoder;
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return 0;
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error_connector_cleanup:
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drm_connector_cleanup(connector);
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error_encoder_cleanup:
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drm_encoder_cleanup(&encoder->base);
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return ret;
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}
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