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/*
* This file is part of the coreboot project.
*
* Copyright 2012 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <northbridge/intel/haswell/i915_reg.h>
#include <northbridge/intel/haswell/drm_dp_helper.h>
/* things that are, strangely, not defined anywhere? */
#define PCH_PP_UNLOCK 0xabcd0000
#define WMx_LP_SR_EN (1<<31)
#define PRB0_TAIL 0x02030
#define PRB0_HEAD 0x02034
#define PRB0_START 0x02038
#define PRB0_CTL 0x0203c
/* mainboard-specific defines */
/* how many bytes do we need for the framebuffer?
* Well, this gets messy. To get an exact answer, we have
* to ask the panel, but we'd rather zero the memory
* and set up the gtt while the panel powers up. So,
* we take a reasonable guess, secure in the knowledge that the
* MRC has to overestimate the number of bytes used.
* 8 MiB is a very safe guess. There may be a better way later, but
* fact is, the initial framebuffer is only very temporary. And taking
* a little long is ok; this is done much faster than the AUX
* channel is ready for IO.
*/
#define FRAME_BUFFER_BYTES (8*MiB)
/* how many 4096-byte pages do we need for the framebuffer?
* There are hard ways to get this, and easy ways:
* there are FRAME_BUFFER_BYTES/4096 pages, since pages are 4096
* on this chip.
*/
#define FRAME_BUFFER_PAGES (FRAME_BUFFER_BYTES/(4096))
/* debug enums. These are for printks that, due to their place in the
* middle of graphics device IO, might change timing. Use with care
* or not at all.
*/
enum {
vio = 2, /* dump every IO */
vspin = 4, /* print # of times we spun on a register value */
};
/* i915.c */
unsigned long io_i915_READ32(unsigned long addr);
void io_i915_WRITE32(unsigned long val, unsigned long addr);
int vbe_mode_info_valid(void);
void fill_lb_framebuffer(struct lb_framebuffer *framebuffer);
/* intel_dp.c */
u32 pack_aux(u32 *src, int src_bytes);
void unpack_aux(u32 src, u8 *dst, int dst_bytes);
int intel_dp_aux_ch(u32 ch_ctl, u32 ch_data, u32 *send, int send_bytes,
u8 *recv, int recv_size);
/* i915io.c */
void graphics_register_reset(u32 aux_ctl, u32 aux_data, int verbose);
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