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/*
* drivers/video/tegra/dc/lvds.c
*
* Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/err.h>
#include <linux/kernel.h>
#include <mach/dc.h>
#include <linux/clk.h>
#include "lvds.h"
#include "dc_priv.h"
static int tegra_dc_lvds_init(struct tegra_dc *dc)
{
struct tegra_dc_lvds_data *lvds;
int err;
lvds = kzalloc(sizeof(*lvds), GFP_KERNEL);
if (!lvds)
return -ENOMEM;
lvds->dc = dc;
lvds->sor = tegra_dc_sor_init(dc, NULL);
if (IS_ERR_OR_NULL(lvds->sor)) {
err = PTR_ERR(lvds->sor);
lvds->sor = NULL;
goto err_init;
}
tegra_dc_set_outdata(dc, lvds);
return 0;
err_init:
kfree(lvds);
return err;
}
static void tegra_dc_lvds_destroy(struct tegra_dc *dc)
{
struct tegra_dc_lvds_data *lvds = tegra_dc_get_outdata(dc);
if (lvds->sor)
tegra_dc_sor_destroy(lvds->sor);
kfree(lvds);
}
static void tegra_dc_lvds_enable(struct tegra_dc *dc)
{
struct tegra_dc_lvds_data *lvds = tegra_dc_get_outdata(dc);
tegra_dc_io_start(dc);
tegra_sor_clk_enable(lvds->sor);
/* Power on panel */
tegra_sor_pad_cal_power(lvds->sor, true);
tegra_dc_sor_set_internal_panel(lvds->sor, true);
tegra_dc_sor_set_power_state(lvds->sor, 1);
tegra_dc_sor_enable_lvds(lvds->sor, false, false);
tegra_dc_io_end(dc);
}
static void tegra_dc_lvds_disable(struct tegra_dc *dc)
{
struct tegra_dc_lvds_data *lvds = tegra_dc_get_outdata(dc);
/* Power down SOR */
tegra_dc_sor_disable(lvds->sor, true);
}
static void tegra_dc_lvds_suspend(struct tegra_dc *dc)
{
struct tegra_dc_lvds_data *lvds = tegra_dc_get_outdata(dc);
tegra_dc_lvds_disable(dc);
lvds->suspended = true;
}
static void tegra_dc_lvds_resume(struct tegra_dc *dc)
{
struct tegra_dc_lvds_data *lvds = tegra_dc_get_outdata(dc);
if (!lvds->suspended)
return;
tegra_dc_lvds_enable(dc);
}
static long tegra_dc_lvds_setup_clk(struct tegra_dc *dc, struct clk *clk)
{
struct tegra_dc_lvds_data *lvds = tegra_dc_get_outdata(dc);
struct clk *parent_clk;
parent_clk = clk_get_sys(NULL, dc->out->parent_clk ? : "pll_d_out0");
if (clk_get_parent(lvds->sor->sor_clk) != parent_clk)
clk_set_parent(lvds->sor->sor_clk, parent_clk);
if (clk_get_parent(clk) != parent_clk)
clk_set_parent(clk, parent_clk);
tegra_sor_setup_clk(lvds->sor, clk, true);
return tegra_dc_pclk_round_rate(dc, lvds->sor->dc->mode.pclk);
}
struct tegra_dc_out_ops tegra_dc_lvds_ops = {
.init = tegra_dc_lvds_init,
.destroy = tegra_dc_lvds_destroy,
.enable = tegra_dc_lvds_enable,
.disable = tegra_dc_lvds_disable,
.suspend = tegra_dc_lvds_suspend,
.resume = tegra_dc_lvds_resume,
.setup_clk = tegra_dc_lvds_setup_clk,
};
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