412 lines
10 KiB
C
412 lines
10 KiB
C
/*
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* Copyright (C) 2012 Texas Instruments
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/i2c.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/consumer.h>
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#include <drm/drm_encoder_slave.h>
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#include "tilcdc_drv.h"
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struct slave_module {
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struct tilcdc_module base;
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struct i2c_adapter *i2c;
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};
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#define to_slave_module(x) container_of(x, struct slave_module, base)
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static const struct tilcdc_panel_info slave_info = {
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.bpp = 16,
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.ac_bias = 255,
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.ac_bias_intrpt = 0,
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.dma_burst_sz = 16,
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.fdd = 0x80,
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.tft_alt_mode = 0,
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.sync_edge = 0,
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.sync_ctrl = 1,
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.raster_order = 0,
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};
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/*
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* Encoder:
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*/
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struct slave_encoder {
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struct drm_encoder_slave base;
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struct slave_module *mod;
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};
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#define to_slave_encoder(x) container_of(to_encoder_slave(x), struct slave_encoder, base)
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static inline struct drm_encoder_slave_funcs *
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get_slave_funcs(struct drm_encoder *enc)
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{
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return to_encoder_slave(enc)->slave_funcs;
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}
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static void slave_encoder_destroy(struct drm_encoder *encoder)
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{
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struct slave_encoder *slave_encoder = to_slave_encoder(encoder);
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if (get_slave_funcs(encoder))
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get_slave_funcs(encoder)->destroy(encoder);
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drm_encoder_cleanup(encoder);
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kfree(slave_encoder);
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}
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static void slave_encoder_prepare(struct drm_encoder *encoder)
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{
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drm_i2c_encoder_prepare(encoder);
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tilcdc_crtc_set_panel_info(encoder->crtc, &slave_info);
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}
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static bool slave_encoder_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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/*
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* tilcdc does not generate VESA-complient sync but aligns
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* VS on the second edge of HS instead of first edge.
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* We use adjusted_mode, to fixup sync by aligning both rising
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* edges and add HSKEW offset to let the slave encoder fix it up.
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*/
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adjusted_mode->hskew = mode->hsync_end - mode->hsync_start;
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adjusted_mode->flags |= DRM_MODE_FLAG_HSKEW;
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if (mode->flags & DRM_MODE_FLAG_NHSYNC) {
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adjusted_mode->flags |= DRM_MODE_FLAG_PHSYNC;
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adjusted_mode->flags &= ~DRM_MODE_FLAG_NHSYNC;
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} else {
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adjusted_mode->flags |= DRM_MODE_FLAG_NHSYNC;
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adjusted_mode->flags &= ~DRM_MODE_FLAG_PHSYNC;
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}
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return drm_i2c_encoder_mode_fixup(encoder, mode, adjusted_mode);
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}
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static const struct drm_encoder_funcs slave_encoder_funcs = {
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.destroy = slave_encoder_destroy,
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};
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static const struct drm_encoder_helper_funcs slave_encoder_helper_funcs = {
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.dpms = drm_i2c_encoder_dpms,
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.mode_fixup = slave_encoder_fixup,
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.prepare = slave_encoder_prepare,
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.commit = drm_i2c_encoder_commit,
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.mode_set = drm_i2c_encoder_mode_set,
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.save = drm_i2c_encoder_save,
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.restore = drm_i2c_encoder_restore,
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};
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static const struct i2c_board_info info = {
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I2C_BOARD_INFO("tda998x", 0x70)
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};
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static struct drm_encoder *slave_encoder_create(struct drm_device *dev,
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struct slave_module *mod)
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{
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struct slave_encoder *slave_encoder;
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struct drm_encoder *encoder;
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int ret;
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slave_encoder = kzalloc(sizeof(*slave_encoder), GFP_KERNEL);
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if (!slave_encoder) {
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dev_err(dev->dev, "allocation failed\n");
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return NULL;
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}
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slave_encoder->mod = mod;
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encoder = &slave_encoder->base.base;
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encoder->possible_crtcs = 1;
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ret = drm_encoder_init(dev, encoder, &slave_encoder_funcs,
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DRM_MODE_ENCODER_TMDS);
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if (ret)
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goto fail;
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drm_encoder_helper_add(encoder, &slave_encoder_helper_funcs);
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ret = drm_i2c_encoder_init(dev, to_encoder_slave(encoder), mod->i2c, &info);
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if (ret)
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goto fail;
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return encoder;
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fail:
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slave_encoder_destroy(encoder);
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return NULL;
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}
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/*
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* Connector:
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*/
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struct slave_connector {
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struct drm_connector base;
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struct drm_encoder *encoder; /* our connected encoder */
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struct slave_module *mod;
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};
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#define to_slave_connector(x) container_of(x, struct slave_connector, base)
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static void slave_connector_destroy(struct drm_connector *connector)
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{
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struct slave_connector *slave_connector = to_slave_connector(connector);
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drm_sysfs_connector_remove(connector);
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drm_connector_cleanup(connector);
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kfree(slave_connector);
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}
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static enum drm_connector_status slave_connector_detect(
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struct drm_connector *connector,
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bool force)
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{
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struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
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return get_slave_funcs(encoder)->detect(encoder, connector);
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}
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static int slave_connector_get_modes(struct drm_connector *connector)
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{
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struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
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return get_slave_funcs(encoder)->get_modes(encoder, connector);
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}
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static int slave_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
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struct tilcdc_drm_private *priv = connector->dev->dev_private;
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int ret;
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ret = tilcdc_crtc_mode_valid(priv->crtc, mode);
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if (ret != MODE_OK)
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return ret;
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return get_slave_funcs(encoder)->mode_valid(encoder, mode);
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}
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static struct drm_encoder *slave_connector_best_encoder(
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struct drm_connector *connector)
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{
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struct slave_connector *slave_connector = to_slave_connector(connector);
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return slave_connector->encoder;
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}
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static int slave_connector_set_property(struct drm_connector *connector,
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struct drm_property *property, uint64_t value)
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{
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struct drm_encoder *encoder = to_slave_connector(connector)->encoder;
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return get_slave_funcs(encoder)->set_property(encoder,
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connector, property, value);
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}
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static const struct drm_connector_funcs slave_connector_funcs = {
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.destroy = slave_connector_destroy,
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.dpms = drm_helper_connector_dpms,
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.detect = slave_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.set_property = slave_connector_set_property,
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};
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static const struct drm_connector_helper_funcs slave_connector_helper_funcs = {
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.get_modes = slave_connector_get_modes,
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.mode_valid = slave_connector_mode_valid,
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.best_encoder = slave_connector_best_encoder,
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};
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static struct drm_connector *slave_connector_create(struct drm_device *dev,
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struct slave_module *mod, struct drm_encoder *encoder)
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{
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struct slave_connector *slave_connector;
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struct drm_connector *connector;
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int ret;
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slave_connector = kzalloc(sizeof(*slave_connector), GFP_KERNEL);
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if (!slave_connector) {
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dev_err(dev->dev, "allocation failed\n");
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return NULL;
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}
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slave_connector->encoder = encoder;
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slave_connector->mod = mod;
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connector = &slave_connector->base;
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drm_connector_init(dev, connector, &slave_connector_funcs,
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DRM_MODE_CONNECTOR_HDMIA);
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drm_connector_helper_add(connector, &slave_connector_helper_funcs);
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connector->polled = DRM_CONNECTOR_POLL_CONNECT |
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DRM_CONNECTOR_POLL_DISCONNECT;
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connector->interlace_allowed = 0;
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connector->doublescan_allowed = 0;
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get_slave_funcs(encoder)->create_resources(encoder, connector);
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ret = drm_mode_connector_attach_encoder(connector, encoder);
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if (ret)
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goto fail;
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drm_connector_register(connector);
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return connector;
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fail:
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slave_connector_destroy(connector);
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return NULL;
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}
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/*
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* Module:
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*/
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static int slave_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
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{
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struct slave_module *slave_mod = to_slave_module(mod);
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struct tilcdc_drm_private *priv = dev->dev_private;
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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encoder = slave_encoder_create(dev, slave_mod);
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if (!encoder)
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return -ENOMEM;
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connector = slave_connector_create(dev, slave_mod, encoder);
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if (!connector)
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return -ENOMEM;
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priv->encoders[priv->num_encoders++] = encoder;
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priv->connectors[priv->num_connectors++] = connector;
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return 0;
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}
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static const struct tilcdc_module_ops slave_module_ops = {
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.modeset_init = slave_modeset_init,
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};
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/*
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* Device:
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*/
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static struct of_device_id slave_of_match[];
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static int slave_probe(struct platform_device *pdev)
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{
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struct device_node *node = pdev->dev.of_node;
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struct device_node *i2c_node;
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struct slave_module *slave_mod;
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struct tilcdc_module *mod;
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struct pinctrl *pinctrl;
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uint32_t i2c_phandle;
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struct i2c_adapter *slavei2c;
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int ret = -EINVAL;
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/* bail out early if no DT data: */
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if (!node) {
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dev_err(&pdev->dev, "device-tree data is missing\n");
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return -ENXIO;
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}
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/* Bail out early if i2c not specified */
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if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
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dev_err(&pdev->dev, "could not get i2c bus phandle\n");
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return ret;
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}
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i2c_node = of_find_node_by_phandle(i2c_phandle);
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if (!i2c_node) {
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dev_err(&pdev->dev, "could not get i2c bus node\n");
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return ret;
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}
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/* but defer the probe if it can't be initialized it might come later */
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slavei2c = of_find_i2c_adapter_by_node(i2c_node);
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of_node_put(i2c_node);
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if (!slavei2c) {
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ret = -EPROBE_DEFER;
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tilcdc_slave_probedefer(true);
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dev_err(&pdev->dev, "could not get i2c\n");
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return ret;
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}
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slave_mod = kzalloc(sizeof(*slave_mod), GFP_KERNEL);
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if (!slave_mod) {
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ret = -ENOMEM;
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goto fail_adapter;
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}
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mod = &slave_mod->base;
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pdev->dev.platform_data = mod;
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mod->preferred_bpp = slave_info.bpp;
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slave_mod->i2c = slavei2c;
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tilcdc_module_init(mod, "slave", &slave_module_ops);
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pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
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if (IS_ERR(pinctrl))
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dev_warn(&pdev->dev, "pins are not configured\n");
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tilcdc_slave_probedefer(false);
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return 0;
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fail_adapter:
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i2c_put_adapter(slavei2c);
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return ret;
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}
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static int slave_remove(struct platform_device *pdev)
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{
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struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
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struct slave_module *slave_mod = to_slave_module(mod);
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tilcdc_module_cleanup(mod);
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kfree(slave_mod);
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return 0;
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}
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static struct of_device_id slave_of_match[] = {
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{ .compatible = "ti,tilcdc,slave", },
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{ },
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};
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struct platform_driver slave_driver = {
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.probe = slave_probe,
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.remove = slave_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "slave",
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.of_match_table = slave_of_match,
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},
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};
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int __init tilcdc_slave_init(void)
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{
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return platform_driver_register(&slave_driver);
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}
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void __exit tilcdc_slave_fini(void)
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{
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platform_driver_unregister(&slave_driver);
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}
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