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/*
* Copyright 2013 Google Inc.
*
* 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:
* Keith Packard <keithp@keithp.com>
*
*/
/* This code was created by the coccinnelle filters in the i915tool,
* with some final hand filtering.
*/
#include <console/console.h>
#include <stdint.h>
#include <delay.h>
#include <drivers/intel/gma/i915.h>
#include <string.h>
void compute_display_params(struct intel_dp *dp)
{
struct edid *edid = &(dp->edid);
struct edid_mode *mode = &edid->mode;
/* step 1: get the constants in the dp struct set up. */
dp->lane_count = dp->dpcd[DP_MAX_LANE_COUNT]&DP_LANE_COUNT_MASK;
dp->link_bw = dp->dpcd[DP_MAX_LINK_RATE];
dp->clock = intel_dp_bw_code_to_link_rate(dp->link_bw);
dp->edid.link_clock = intel_dp_bw_code_to_link_rate(dp->link_bw);
/* step 2. Do some computation of other stuff. */
dp->bytes_per_pixel = dp->pipe_bits_per_pixel/8;
dp->stride = edid->bytes_per_line;
dp->htotal = (mode->ha - 1) | ((mode->ha + mode->hbl - 1) << 16);
dp->hblank = (mode->ha - 1) | ((mode->ha + mode->hbl - 1) << 16);
dp->hsync = (mode->ha + mode->hso - 1) |
((mode->ha + mode->hso + mode->hspw - 1) << 16);
dp->vtotal = (mode->va - 1) | ((mode->va + mode->vbl - 1) << 16);
dp->vblank = (mode->va - 1) | ((mode->va + mode->vbl - 1) << 16);
dp->vsync = (mode->va + mode->vso - 1) |
((mode->va + mode->vso + mode->vspw - 1) << 16);
/* PIPEASRC is wid-1 x ht-1 */
dp->pipesrc = (mode->ha-1)<<16 | (mode->va-1);
dp->pfa_pos = 0;
dp->pfa_ctl = PF_ENABLE | PF_FILTER_MED_3x3;
/* IVB hack */
if (dp->gen == 6)
dp->pfa_ctl |= PF_PIPE_SEL_IVB(dp->pipe);
dp->pfa_sz = (mode->ha << 16) | (mode->va);
/* step 3. Call the linux code we pulled in. */
dp->flags = intel_ddi_calc_transcoder_flags(edid->panel_bits_per_pixel,
dp->port,
dp->pipe,
dp->type,
dp->lane_count,
dp->pfa_sz,
mode->phsync == '+'?1:0,
mode->pvsync == '+'?1:0);
dp->transcoder = intel_ddi_get_transcoder(dp->port,
dp->pipe);
intel_dp_compute_m_n(edid->panel_bits_per_pixel,
dp->lane_count,
dp->edid.mode.pixel_clock,
dp->edid.link_clock,
&dp->m_n);
printk(BIOS_SPEW, "dp->lane_count = 0x%08x\n",dp->lane_count);
printk(BIOS_SPEW, "dp->stride = 0x%08x\n",dp->stride);
printk(BIOS_SPEW, "dp->htotal = 0x%08x\n", dp->htotal);
printk(BIOS_SPEW, "dp->hblank = 0x%08x\n", dp->hblank);
printk(BIOS_SPEW, "dp->hsync = 0x%08x\n", dp->hsync);
printk(BIOS_SPEW, "dp->vtotal = 0x%08x\n", dp->vtotal);
printk(BIOS_SPEW, "dp->vblank = 0x%08x\n", dp->vblank);
printk(BIOS_SPEW, "dp->vsync = 0x%08x\n", dp->vsync);
printk(BIOS_SPEW, "dp->pipesrc = 0x%08x\n", dp->pipesrc);
printk(BIOS_SPEW, "dp->pfa_pos = 0x%08x\n", dp->pfa_pos);
printk(BIOS_SPEW, "dp->pfa_ctl = 0x%08x\n", dp->pfa_ctl);
printk(BIOS_SPEW, "dp->pfa_sz = 0x%08x\n", dp->pfa_sz);
printk(BIOS_SPEW, "dp->link_m = 0x%08x\n", dp->m_n.link_m);
printk(BIOS_SPEW, "dp->link_n = 0x%08x\n", dp->m_n.link_n);
printk(BIOS_SPEW, "0x6f030 = 0x%08x\n",
TU_SIZE(dp->m_n.tu) | dp->m_n.gmch_m);
printk(BIOS_SPEW, "0x6f030 = 0x%08x\n", dp->m_n.gmch_m);
printk(BIOS_SPEW, "0x6f034 = 0x%08x\n", dp->m_n.gmch_n);
printk(BIOS_SPEW, "dp->flags = 0x%08x\n", dp->flags);
}
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