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/*
* Copyright 2013 Google Inc.
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eugeni Dodonov <eugeni.dodonov@intel.com>
*
*/
#include <types.h>
#include <stdlib.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <console/console.h>
#include <arch/acpi.h>
#include <boot/coreboot_tables.h>
#include <smbios.h>
#include <device/pci.h>
#include <ec/google/chromeec/ec.h>
#include <cpu/x86/tsc.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include <edid.h>
#include <drivers/intel/gma/i915.h>
/* HDMI/DVI modes ignore everything but the last 2 items. So we share
* them for both DP and FDI transports, allowing those ports to
* automatically adapt to HDMI connections as well.
*/
static u32 hsw_ddi_translations_dp[] = {
0x00FFFFFF, 0x0006000E, /* DP parameters */
0x00D75FFF, 0x0005000A,
0x00C30FFF, 0x00040006,
0x80AAAFFF, 0x000B0000,
0x00FFFFFF, 0x0005000A,
0x00D75FFF, 0x000C0004,
0x80C30FFF, 0x000B0000,
0x00FFFFFF, 0x00040006,
0x80D75FFF, 0x000B0000,
0x00FFFFFF, 0x00040006 /* HDMI parameters */
};
static u32 hsw_ddi_translations_fdi[] = {
0x00FFFFFF, 0x0007000E, /* FDI parameters */
0x00D75FFF, 0x000F000A,
0x00C30FFF, 0x00060006,
0x00AAAFFF, 0x001E0000,
0x00FFFFFF, 0x000F000A,
0x00D75FFF, 0x00160004,
0x00C30FFF, 0x001E0000,
0x00FFFFFF, 0x00060006,
0x00D75FFF, 0x001E0000,
0x00FFFFFF, 0x00040006 /* HDMI parameters */
};
/* On Haswell, DDI port buffers must be programmed with correct values
* in advance. The buffer values are different for FDI and DP modes,
* but the HDMI/DVI fields are shared among those. So we program the DDI
* in either FDI or DP modes only, as HDMI connections will work with both
* of those.
*/
static void intel_prepare_ddi_buffers(int port, int use_fdi_mode)
{
u32 reg;
int i;
u32 *ddi_translations = ((use_fdi_mode) ?
hsw_ddi_translations_fdi :
hsw_ddi_translations_dp);
printk(BIOS_SPEW, "Initializing DDI buffers for port %d in %s mode\n",
port,
use_fdi_mode ? "FDI" : "DP");
for (i=0,reg=DDI_BUF_TRANS(port);i < ARRAY_SIZE(hsw_ddi_translations_fdi);i++) {
gtt_write(reg,ddi_translations[i]);
reg += 4;
}
}
void intel_prepare_ddi(void)
{
int port;
u32 use_fdi = 1;
for (port = PORT_A; port < PORT_E; port++)
intel_prepare_ddi_buffers(port, !use_fdi);
intel_prepare_ddi_buffers(PORT_E, use_fdi);
}
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