diff options
Diffstat (limited to 'drivers/gpu/drm/i2c/dummy_drm_i2c_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i2c/dummy_drm_i2c_drv.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i2c/dummy_drm_i2c_drv.c b/drivers/gpu/drm/i2c/dummy_drm_i2c_drv.c new file mode 100644 index 000000000000..7817c802a6e3 --- /dev/null +++ b/drivers/gpu/drm/i2c/dummy_drm_i2c_drv.c @@ -0,0 +1,454 @@ +/* + * This file was originally based on tda998x_drv.c which has the following + * copyright and licence... + * + * Copyright (C) 2012 Texas Instruments + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/component.h> +#include <linux/module.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_encoder_slave.h> +#include <drm/drm_edid.h> +#include <drm/drm_of.h> + +struct dummy_priv { + struct drm_encoder *encoder; +}; + +struct dummy_encoder_params { +}; + +#define to_dummy_priv(x) ((struct dummy_priv *)to_encoder_slave(x)->slave_priv) + +/* DRM encoder functions */ + +static void dummy_encoder_set_config(struct dummy_priv *priv, + const struct dummy_encoder_params *p) +{ +} + +static void dummy_encoder_dpms(struct dummy_priv *priv, int mode) +{ +} + +static void +dummy_encoder_save(struct drm_encoder *encoder) +{ +} + +static void +dummy_encoder_restore(struct drm_encoder *encoder) +{ +} + +static bool +dummy_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static int dummy_encoder_mode_valid(struct dummy_priv *priv, + struct drm_display_mode *mode) +{ + return MODE_OK; +} + +static void +dummy_encoder_mode_set(struct dummy_priv *priv, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ +} + +static enum drm_connector_status +dummy_encoder_detect(struct dummy_priv *priv) +{ + return connector_status_connected; +} + + +static const u8 edid_1024x768[] = { + /* + * These values are a copy of Documentation/EDID/1024x768.c + * produced by executing "make -C Documentation/EDID" + */ + 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, + 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78, + 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25, + 0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40, + 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, + 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19, + 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90, + 0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18, + 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e, + 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20, + 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b, + 0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, + 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58, + 0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55 +}; + +static int +dummy_encoder_get_modes(struct dummy_priv *priv, + struct drm_connector *connector) +{ + struct edid *edid = (struct edid *)edid_1024x768; + int n; + + drm_mode_connector_update_edid_property(connector, edid); + n = drm_add_edid_modes(connector, edid); + + return n; +} + +static int +dummy_encoder_set_property(struct drm_encoder *encoder, + struct drm_connector *connector, + struct drm_property *property, + uint64_t val) +{ + return 0; +} + +static void dummy_destroy(struct dummy_priv *priv) +{ +} + +/* Slave encoder support */ + +static void +dummy_encoder_slave_set_config(struct drm_encoder *encoder, void *params) +{ + dummy_encoder_set_config(to_dummy_priv(encoder), params); +} + +static void dummy_encoder_slave_destroy(struct drm_encoder *encoder) +{ + struct dummy_priv *priv = to_dummy_priv(encoder); + + dummy_destroy(priv); + drm_i2c_encoder_destroy(encoder); + kfree(priv); +} + +static void dummy_encoder_slave_dpms(struct drm_encoder *encoder, int mode) +{ + dummy_encoder_dpms(to_dummy_priv(encoder), mode); +} + +static int dummy_encoder_slave_mode_valid(struct drm_encoder *encoder, + struct drm_display_mode *mode) +{ + return dummy_encoder_mode_valid(to_dummy_priv(encoder), mode); +} + +static void +dummy_encoder_slave_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + dummy_encoder_mode_set(to_dummy_priv(encoder), mode, adjusted_mode); +} + +static enum drm_connector_status +dummy_encoder_slave_detect(struct drm_encoder *encoder, + struct drm_connector *connector) +{ + return dummy_encoder_detect(to_dummy_priv(encoder)); +} + +static int dummy_encoder_slave_get_modes(struct drm_encoder *encoder, + struct drm_connector *connector) +{ + return dummy_encoder_get_modes(to_dummy_priv(encoder), connector); +} + +static int +dummy_encoder_slave_create_resources(struct drm_encoder *encoder, + struct drm_connector *connector) +{ + return 0; +} + +static struct drm_encoder_slave_funcs dummy_encoder_slave_funcs = { + .set_config = dummy_encoder_slave_set_config, + .destroy = dummy_encoder_slave_destroy, + .dpms = dummy_encoder_slave_dpms, + .save = dummy_encoder_save, + .restore = dummy_encoder_restore, + .mode_fixup = dummy_encoder_mode_fixup, + .mode_valid = dummy_encoder_slave_mode_valid, + .mode_set = dummy_encoder_slave_mode_set, + .detect = dummy_encoder_slave_detect, + .get_modes = dummy_encoder_slave_get_modes, + .create_resources = dummy_encoder_slave_create_resources, + .set_property = dummy_encoder_set_property, +}; + +/* I2C driver functions */ + +static int dummy_encoder_init(struct i2c_client *client, + struct drm_device *dev, + struct drm_encoder_slave *encoder_slave) +{ + struct dummy_priv *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->encoder = &encoder_slave->base; + + encoder_slave->slave_priv = priv; + encoder_slave->slave_funcs = &dummy_encoder_slave_funcs; + + return 0; +} + +struct dummy_priv2 { + struct dummy_priv base; + struct drm_encoder encoder; + struct drm_connector connector; +}; + +#define conn_to_dummy_priv2(x) \ + container_of(x, struct dummy_priv2, connector); + +#define enc_to_dummy_priv2(x) \ + container_of(x, struct dummy_priv2, encoder); + +static void dummy_encoder2_dpms(struct drm_encoder *encoder, int mode) +{ + struct dummy_priv2 *priv = enc_to_dummy_priv2(encoder); + + dummy_encoder_dpms(&priv->base, mode); +} + +static void dummy_encoder_prepare(struct drm_encoder *encoder) +{ + dummy_encoder2_dpms(encoder, DRM_MODE_DPMS_OFF); +} + +static void dummy_encoder_commit(struct drm_encoder *encoder) +{ + dummy_encoder2_dpms(encoder, DRM_MODE_DPMS_ON); +} + +static void dummy_encoder2_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct dummy_priv2 *priv = enc_to_dummy_priv2(encoder); + + dummy_encoder_mode_set(&priv->base, mode, adjusted_mode); +} + +static const struct drm_encoder_helper_funcs dummy_encoder_helper_funcs = { + .dpms = dummy_encoder2_dpms, + .save = dummy_encoder_save, + .restore = dummy_encoder_restore, + .mode_fixup = dummy_encoder_mode_fixup, + .prepare = dummy_encoder_prepare, + .commit = dummy_encoder_commit, + .mode_set = dummy_encoder2_mode_set, +}; + +static void dummy_encoder_destroy(struct drm_encoder *encoder) +{ + struct dummy_priv2 *priv = enc_to_dummy_priv2(encoder); + + dummy_destroy(&priv->base); + drm_encoder_cleanup(encoder); +} + +static const struct drm_encoder_funcs dummy_encoder_funcs = { + .destroy = dummy_encoder_destroy, +}; + +static int dummy_connector_get_modes(struct drm_connector *connector) +{ + struct dummy_priv2 *priv = conn_to_dummy_priv2(connector); + + return dummy_encoder_get_modes(&priv->base, connector); +} + +static int dummy_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct dummy_priv2 *priv = conn_to_dummy_priv2(connector); + + return dummy_encoder_mode_valid(&priv->base, mode); +} + +static struct drm_encoder * +dummy_connector_best_encoder(struct drm_connector *connector) +{ + struct dummy_priv2 *priv = conn_to_dummy_priv2(connector); + + return &priv->encoder; +} + +static +const struct drm_connector_helper_funcs dummy_connector_helper_funcs = { + .get_modes = dummy_connector_get_modes, + .mode_valid = dummy_connector_mode_valid, + .best_encoder = dummy_connector_best_encoder, +}; + +static enum drm_connector_status +dummy_connector_detect(struct drm_connector *connector, bool force) +{ + struct dummy_priv2 *priv = conn_to_dummy_priv2(connector); + + return dummy_encoder_detect(&priv->base); +} + +static void dummy_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs dummy_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = dummy_connector_detect, + .destroy = dummy_connector_destroy, +}; + +static int dummy_bind(struct device *dev, struct device *master, void *data) +{ + struct drm_device *drm = data; + struct dummy_priv2 *priv; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(dev, priv); + + priv->base.encoder = &priv->encoder; + priv->encoder.possible_crtcs = 1 << 0; + + drm_encoder_helper_add(&priv->encoder, &dummy_encoder_helper_funcs); + ret = drm_encoder_init(drm, &priv->encoder, &dummy_encoder_funcs, + DRM_MODE_ENCODER_TMDS); + if (ret) + goto err_encoder; + + drm_connector_helper_add(&priv->connector, + &dummy_connector_helper_funcs); + ret = drm_connector_init(drm, &priv->connector, + &dummy_connector_funcs, + DRM_MODE_CONNECTOR_HDMIA); + if (ret) + goto err_connector; + + ret = drm_connector_register(&priv->connector); + if (ret) + goto err_sysfs; + + priv->connector.encoder = &priv->encoder; + drm_mode_connector_attach_encoder(&priv->connector, &priv->encoder); + + return 0; + +err_sysfs: + drm_connector_cleanup(&priv->connector); +err_connector: + drm_encoder_cleanup(&priv->encoder); +err_encoder: + dummy_destroy(&priv->base); + return ret; +} + +static void dummy_unbind(struct device *dev, struct device *master, + void *data) +{ + struct dummy_priv2 *priv = dev_get_drvdata(dev); + + drm_connector_cleanup(&priv->connector); + drm_encoder_cleanup(&priv->encoder); + dummy_destroy(&priv->base); +} + +static const struct component_ops dummy_ops = { + .bind = dummy_bind, + .unbind = dummy_unbind, +}; + +static int +dummy_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + return component_add(&client->dev, &dummy_ops); +} + +static int dummy_remove(struct i2c_client *client) +{ + component_del(&client->dev, &dummy_ops); + return 0; +} + +static const struct of_device_id dummy_of_ids[] = { + { .compatible = "sil,sii9022-tpi", }, + { } +}; +MODULE_DEVICE_TABLE(of, dummy_of_ids); + +static struct i2c_device_id dummy_ids[] = { + { } +}; +MODULE_DEVICE_TABLE(i2c, dummy_ids); + +static struct drm_i2c_encoder_driver dummy_driver = { + .i2c_driver = { + .probe = dummy_probe, + .remove = dummy_remove, + .driver = { + .name = "dummy_drm_i2c", + .of_match_table = dummy_of_ids + }, + .id_table = dummy_ids, + }, + .encoder_init = dummy_encoder_init, +}; + +/* Module initialization */ + +static int __init +dummy_init(void) +{ + return drm_i2c_encoder_register(THIS_MODULE, &dummy_driver); +} + +static void __exit +dummy_exit(void) +{ + drm_i2c_encoder_unregister(&dummy_driver); +} + +MODULE_LICENSE("GPL"); + +module_init(dummy_init); +module_exit(dummy_exit); |