+++ /dev/null
-/*
- * 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/i2c.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/pinctrl/consumer.h>
-#include <drm/drm_encoder_slave.h>
-
-#include "tilcdc_drv.h"
-
-struct slave_module {
- struct tilcdc_module base;
- struct i2c_adapter *i2c;
-};
-#define to_slave_module(x) container_of(x, struct slave_module, base)
-
-static const struct tilcdc_panel_info slave_info = {
- .bpp = 16,
- .ac_bias = 255,
- .ac_bias_intrpt = 0,
- .dma_burst_sz = 16,
- .fdd = 0x80,
- .tft_alt_mode = 0,
- .sync_edge = 0,
- .sync_ctrl = 1,
- .raster_order = 0,
-};
-
-
-/*
- * Encoder:
- */
-
-struct slave_encoder {
- struct drm_encoder_slave base;
- struct slave_module *mod;
-};
-#define to_slave_encoder(x) container_of(to_encoder_slave(x), struct slave_encoder, base)
-
-static inline struct drm_encoder_slave_funcs *
-get_slave_funcs(struct drm_encoder *enc)
-{
- return to_encoder_slave(enc)->slave_funcs;
-}
-
-static void slave_encoder_destroy(struct drm_encoder *encoder)
-{
- struct slave_encoder *slave_encoder = to_slave_encoder(encoder);
- if (get_slave_funcs(encoder))
- get_slave_funcs(encoder)->destroy(encoder);
- drm_encoder_cleanup(encoder);
- kfree(slave_encoder);
-}
-
-static void slave_encoder_prepare(struct drm_encoder *encoder)
-{
- drm_i2c_encoder_prepare(encoder);
- tilcdc_crtc_set_panel_info(encoder->crtc, &slave_info);
-}
-
-static bool slave_encoder_fixup(struct drm_encoder *encoder,
- const struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
-{
- /*
- * tilcdc does not generate VESA-complient sync but aligns
- * VS on the second edge of HS instead of first edge.
- * We use adjusted_mode, to fixup sync by aligning both rising
- * edges and add HSKEW offset to let the slave encoder fix it up.
- */
- adjusted_mode->hskew = mode->hsync_end - mode->hsync_start;
- adjusted_mode->flags |= DRM_MODE_FLAG_HSKEW;
-
- if (mode->flags & DRM_MODE_FLAG_NHSYNC) {
- adjusted_mode->flags |= DRM_MODE_FLAG_PHSYNC;
- adjusted_mode->flags &= ~DRM_MODE_FLAG_NHSYNC;
- } else {
- adjusted_mode->flags |= DRM_MODE_FLAG_NHSYNC;
- adjusted_mode->flags &= ~DRM_MODE_FLAG_PHSYNC;
- }
-
- return drm_i2c_encoder_mode_fixup(encoder, mode, adjusted_mode);
-}
-
-
-static const struct drm_encoder_funcs slave_encoder_funcs = {
- .destroy = slave_encoder_destroy,
-};
-
-static const struct drm_encoder_helper_funcs slave_encoder_helper_funcs = {
- .dpms = drm_i2c_encoder_dpms,
- .mode_fixup = slave_encoder_fixup,
- .prepare = slave_encoder_prepare,
- .commit = drm_i2c_encoder_commit,
- .mode_set = drm_i2c_encoder_mode_set,
- .save = drm_i2c_encoder_save,
- .restore = drm_i2c_encoder_restore,
-};
-
-static const struct i2c_board_info info = {
- I2C_BOARD_INFO("tda998x", 0x70)
-};
-
-static struct drm_encoder *slave_encoder_create(struct drm_device *dev,
- struct slave_module *mod)
-{
- struct slave_encoder *slave_encoder;
- struct drm_encoder *encoder;
- int ret;
-
- slave_encoder = kzalloc(sizeof(*slave_encoder), GFP_KERNEL);
- if (!slave_encoder) {
- dev_err(dev->dev, "allocation failed\n");
- return NULL;
- }
-
- slave_encoder->mod = mod;
-
- encoder = &slave_encoder->base.base;
- encoder->possible_crtcs = 1;
-
- ret = drm_encoder_init(dev, encoder, &slave_encoder_funcs,
- DRM_MODE_ENCODER_TMDS);
- if (ret)
- goto fail;
-
- drm_encoder_helper_add(encoder, &slave_encoder_helper_funcs);
-
- ret = drm_i2c_encoder_init(dev, to_encoder_slave(encoder), mod->i2c, &info);
- if (ret)
- goto fail;
-
- return encoder;
-
-fail:
- slave_encoder_destroy(encoder);
- return NULL;
-}
-
-/*
- * Connector:
- */
-
-struct slave_connector {
- struct drm_connector base;
-
- struct drm_encoder *encoder; /* our connected encoder */
- struct slave_module *mod;
-};
-#define to_slave_connector(x) container_of(x, struct slave_connector, base)
-
-static void slave_connector_destroy(struct drm_connector *connector)
-{
- struct slave_connector *slave_connector = to_slave_connector(connector);
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
- kfree(slave_connector);
-}
-
-static enum drm_connector_status slave_connector_detect(
- struct drm_connector *connector,
- bool force)
-{
- struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
- return get_slave_funcs(encoder)->detect(encoder, connector);
-}
-
-static int slave_connector_get_modes(struct drm_connector *connector)
-{
- struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
- return get_slave_funcs(encoder)->get_modes(encoder, connector);
-}
-
-static int slave_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
-{
- struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
- struct tilcdc_drm_private *priv = connector->dev->dev_private;
- int ret;
-
- ret = tilcdc_crtc_mode_valid(priv->crtc, mode);
- if (ret != MODE_OK)
- return ret;
-
- return get_slave_funcs(encoder)->mode_valid(encoder, mode);
-}
-
-static struct drm_encoder *slave_connector_best_encoder(
- struct drm_connector *connector)
-{
- struct slave_connector *slave_connector = to_slave_connector(connector);
- return slave_connector->encoder;
-}
-
-static int slave_connector_set_property(struct drm_connector *connector,
- struct drm_property *property, uint64_t value)
-{
- struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
- return get_slave_funcs(encoder)->set_property(encoder,
- connector, property, value);
-}
-
-static const struct drm_connector_funcs slave_connector_funcs = {
- .destroy = slave_connector_destroy,
- .dpms = drm_helper_connector_dpms,
- .detect = slave_connector_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .set_property = slave_connector_set_property,
-};
-
-static const struct drm_connector_helper_funcs slave_connector_helper_funcs = {
- .get_modes = slave_connector_get_modes,
- .mode_valid = slave_connector_mode_valid,
- .best_encoder = slave_connector_best_encoder,
-};
-
-static struct drm_connector *slave_connector_create(struct drm_device *dev,
- struct slave_module *mod, struct drm_encoder *encoder)
-{
- struct slave_connector *slave_connector;
- struct drm_connector *connector;
- int ret;
-
- slave_connector = kzalloc(sizeof(*slave_connector), GFP_KERNEL);
- if (!slave_connector) {
- dev_err(dev->dev, "allocation failed\n");
- return NULL;
- }
-
- slave_connector->encoder = encoder;
- slave_connector->mod = mod;
-
- connector = &slave_connector->base;
-
- drm_connector_init(dev, connector, &slave_connector_funcs,
- DRM_MODE_CONNECTOR_HDMIA);
- drm_connector_helper_add(connector, &slave_connector_helper_funcs);
-
- connector->polled = DRM_CONNECTOR_POLL_CONNECT |
- DRM_CONNECTOR_POLL_DISCONNECT;
-
- connector->interlace_allowed = 0;
- connector->doublescan_allowed = 0;
-
- get_slave_funcs(encoder)->create_resources(encoder, connector);
-
- ret = drm_mode_connector_attach_encoder(connector, encoder);
- if (ret)
- goto fail;
-
- drm_connector_register(connector);
-
- return connector;
-
-fail:
- slave_connector_destroy(connector);
- return NULL;
-}
-
-/*
- * Module:
- */
-
-static int slave_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
-{
- struct slave_module *slave_mod = to_slave_module(mod);
- struct tilcdc_drm_private *priv = dev->dev_private;
- struct drm_encoder *encoder;
- struct drm_connector *connector;
-
- encoder = slave_encoder_create(dev, slave_mod);
- if (!encoder)
- return -ENOMEM;
-
- connector = slave_connector_create(dev, slave_mod, encoder);
- if (!connector)
- return -ENOMEM;
-
- priv->encoders[priv->num_encoders++] = encoder;
- priv->connectors[priv->num_connectors++] = connector;
-
- return 0;
-}
-
-static const struct tilcdc_module_ops slave_module_ops = {
- .modeset_init = slave_modeset_init,
-};
-
-/*
- * Device:
- */
-
-static struct of_device_id slave_of_match[];
-
-static int slave_probe(struct platform_device *pdev)
-{
- struct device_node *node = pdev->dev.of_node;
- struct device_node *i2c_node;
- struct slave_module *slave_mod;
- struct tilcdc_module *mod;
- struct pinctrl *pinctrl;
- uint32_t i2c_phandle;
- struct i2c_adapter *slavei2c;
- int ret = -EINVAL;
-
- /* bail out early if no DT data: */
- if (!node) {
- dev_err(&pdev->dev, "device-tree data is missing\n");
- return -ENXIO;
- }
-
- /* Bail out early if i2c not specified */
- if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
- dev_err(&pdev->dev, "could not get i2c bus phandle\n");
- return ret;
- }
-
- i2c_node = of_find_node_by_phandle(i2c_phandle);
- if (!i2c_node) {
- dev_err(&pdev->dev, "could not get i2c bus node\n");
- return ret;
- }
-
- /* but defer the probe if it can't be initialized it might come later */
- slavei2c = of_find_i2c_adapter_by_node(i2c_node);
- of_node_put(i2c_node);
-
- if (!slavei2c) {
- ret = -EPROBE_DEFER;
- tilcdc_slave_probedefer(true);
- dev_err(&pdev->dev, "could not get i2c\n");
- return ret;
- }
-
- slave_mod = kzalloc(sizeof(*slave_mod), GFP_KERNEL);
- if (!slave_mod) {
- ret = -ENOMEM;
- goto fail_adapter;
- }
-
- mod = &slave_mod->base;
- pdev->dev.platform_data = mod;
-
- mod->preferred_bpp = slave_info.bpp;
-
- slave_mod->i2c = slavei2c;
-
- tilcdc_module_init(mod, "slave", &slave_module_ops);
-
- pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
- if (IS_ERR(pinctrl))
- dev_warn(&pdev->dev, "pins are not configured\n");
-
- tilcdc_slave_probedefer(false);
-
- return 0;
-
-fail_adapter:
- i2c_put_adapter(slavei2c);
- return ret;
-}
-
-static int slave_remove(struct platform_device *pdev)
-{
- struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
- struct slave_module *slave_mod = to_slave_module(mod);
-
- tilcdc_module_cleanup(mod);
- kfree(slave_mod);
-
- return 0;
-}
-
-static struct of_device_id slave_of_match[] = {
- { .compatible = "ti,tilcdc,slave", },
- { },
-};
-
-struct platform_driver slave_driver = {
- .probe = slave_probe,
- .remove = slave_remove,
- .driver = {
- .owner = THIS_MODULE,
- .name = "slave",
- .of_match_table = slave_of_match,
- },
-};
-
-int __init tilcdc_slave_init(void)
-{
- return platform_driver_register(&slave_driver);
-}
-
-void __exit tilcdc_slave_fini(void)
-{
- platform_driver_unregister(&slave_driver);
-}
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff