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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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 <arch/io.h>
#include <stdint.h>
#include <stdlib.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <device/device.h>
#include <soc/nvidia/tegra/types.h>
#include <soc/display.h>
#include <soc/mipi_dsi.h>
#include <soc/mipi_display.h>
#include <soc/tegra_dsi.h>
#include <soc/mipi-phy.h>
int mipi_dphy_set_timing(struct tegra_dsi *dsi)
{
u32 freq = (dsi->clk_rate * 2) / 1000000;
u32 thsdexit = (DSI_PHY_TIMING_DIV(120, (freq)));
u32 thstrial = (((3) + (DSI_PHY_TIMING_DIV((DSI_THSTRAIL_VAL(freq)),
freq))));
u32 tdatzero = DSI_PHY_TIMING_DIV(((145) + (5 * (DSI_TBIT(freq)))),
(freq));
u32 thsprepare = DSI_PHY_TIMING_DIV((65 + (5*(DSI_TBIT(freq)))), freq);
u32 tclktrial = (DSI_PHY_TIMING_DIV(80, freq));
u32 tclkpost = ((DSI_PHY_TIMING_DIV(((70) + ((52) * (DSI_TBIT(freq)))),
freq)));
u32 tclkzero = (DSI_PHY_TIMING_DIV(260, freq));
u32 ttlpx = (DSI_PHY_TIMING_DIV(60, freq)) ;
u32 tclkprepare = (DSI_PHY_TIMING_DIV(60, freq));
u32 tclkpre = 1; //min = 8*UI per mipi spec, tclk_pre=0 should be ok, but using 1 value
u32 twakeup = 0x7F; //min = 1ms
u32 ttaget;
u32 ttassure;
u32 ttago;
u32 value;
if (!ttlpx) {
ttaget = 5;
ttassure = 2;
ttago = 4;
} else {
ttaget = 5 * ttlpx;
ttassure = 2 * ttlpx;
ttago = 4 * ttlpx;
}
value = (thsdexit << 24) |
(thstrial << 16) |
(tdatzero << 8) |
(thsprepare << 0);
tegra_dsi_writel(dsi, value, DSI_PHY_TIMING_0);
value = (tclktrial << 24) |
(tclkpost << 16) |
(tclkzero << 8) |
(ttlpx << 0);
tegra_dsi_writel(dsi, value, DSI_PHY_TIMING_1);
value = (tclkprepare << 16) |
(tclkpre << 8) |
(twakeup << 0);
tegra_dsi_writel(dsi, value, DSI_PHY_TIMING_2);
value = (ttaget << 16) |
(ttassure << 8) |
(ttago << 0),
tegra_dsi_writel(dsi, value, DSI_BTA_TIMING);
return 0;
}
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