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![Chris Wilson](/assets/img/avatar_default.png)
As we warn the user later that we cannot find or load the VBIOS, explaining why is an exercise in debugging. Shouting *ERROR* upsets people and produces bug reports. Reported-by: Michael Rieder <mr@student.ethz.ch> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=43751 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
711 lines
19 KiB
C
711 lines
19 KiB
C
/*
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* Copyright © 2006 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*
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*/
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#include <drm/drm_dp_helper.h>
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#include "drmP.h"
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#include "drm.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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#include "intel_bios.h"
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#define SLAVE_ADDR1 0x70
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#define SLAVE_ADDR2 0x72
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static int panel_type;
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static void *
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find_section(struct bdb_header *bdb, int section_id)
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{
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u8 *base = (u8 *)bdb;
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int index = 0;
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u16 total, current_size;
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u8 current_id;
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/* skip to first section */
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index += bdb->header_size;
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total = bdb->bdb_size;
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/* walk the sections looking for section_id */
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while (index < total) {
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current_id = *(base + index);
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index++;
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current_size = *((u16 *)(base + index));
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index += 2;
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if (current_id == section_id)
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return base + index;
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index += current_size;
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}
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return NULL;
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}
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static u16
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get_blocksize(void *p)
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{
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u16 *block_ptr, block_size;
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block_ptr = (u16 *)((char *)p - 2);
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block_size = *block_ptr;
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return block_size;
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}
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static void
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fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
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const struct lvds_dvo_timing *dvo_timing)
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{
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panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
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dvo_timing->hactive_lo;
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panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
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((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
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panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
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dvo_timing->hsync_pulse_width;
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panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
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((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
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panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
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dvo_timing->vactive_lo;
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panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
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dvo_timing->vsync_off;
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panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
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dvo_timing->vsync_pulse_width;
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panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
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((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
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panel_fixed_mode->clock = dvo_timing->clock * 10;
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panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
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if (dvo_timing->hsync_positive)
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panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
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else
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panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
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if (dvo_timing->vsync_positive)
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panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
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else
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panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
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/* Some VBTs have bogus h/vtotal values */
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if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
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panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
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if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
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panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
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drm_mode_set_name(panel_fixed_mode);
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}
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static bool
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lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
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const struct lvds_dvo_timing *b)
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{
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if (a->hactive_hi != b->hactive_hi ||
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a->hactive_lo != b->hactive_lo)
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return false;
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if (a->hsync_off_hi != b->hsync_off_hi ||
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a->hsync_off_lo != b->hsync_off_lo)
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return false;
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if (a->hsync_pulse_width != b->hsync_pulse_width)
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return false;
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if (a->hblank_hi != b->hblank_hi ||
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a->hblank_lo != b->hblank_lo)
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return false;
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if (a->vactive_hi != b->vactive_hi ||
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a->vactive_lo != b->vactive_lo)
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return false;
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if (a->vsync_off != b->vsync_off)
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return false;
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if (a->vsync_pulse_width != b->vsync_pulse_width)
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return false;
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if (a->vblank_hi != b->vblank_hi ||
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a->vblank_lo != b->vblank_lo)
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return false;
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return true;
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}
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static const struct lvds_dvo_timing *
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get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
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const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
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int index)
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{
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/*
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* the size of fp_timing varies on the different platform.
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* So calculate the DVO timing relative offset in LVDS data
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* entry to get the DVO timing entry
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*/
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int lfp_data_size =
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lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
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lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
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int dvo_timing_offset =
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lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
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lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
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char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
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return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
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}
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/* Try to find integrated panel data */
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static void
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parse_lfp_panel_data(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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const struct bdb_lvds_options *lvds_options;
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const struct bdb_lvds_lfp_data *lvds_lfp_data;
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const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
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const struct lvds_dvo_timing *panel_dvo_timing;
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struct drm_display_mode *panel_fixed_mode;
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int i, downclock;
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lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
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if (!lvds_options)
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return;
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dev_priv->lvds_dither = lvds_options->pixel_dither;
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if (lvds_options->panel_type == 0xff)
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return;
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panel_type = lvds_options->panel_type;
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lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
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if (!lvds_lfp_data)
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return;
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lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
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if (!lvds_lfp_data_ptrs)
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return;
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dev_priv->lvds_vbt = 1;
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panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
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lvds_lfp_data_ptrs,
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lvds_options->panel_type);
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panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
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if (!panel_fixed_mode)
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return;
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fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
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dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
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DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
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drm_mode_debug_printmodeline(panel_fixed_mode);
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/*
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* Iterate over the LVDS panel timing info to find the lowest clock
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* for the native resolution.
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*/
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downclock = panel_dvo_timing->clock;
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for (i = 0; i < 16; i++) {
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const struct lvds_dvo_timing *dvo_timing;
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dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
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lvds_lfp_data_ptrs,
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i);
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if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
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dvo_timing->clock < downclock)
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downclock = dvo_timing->clock;
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}
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if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) {
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dev_priv->lvds_downclock_avail = 1;
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dev_priv->lvds_downclock = downclock * 10;
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DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
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"Normal Clock %dKHz, downclock %dKHz\n",
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panel_fixed_mode->clock, 10*downclock);
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}
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}
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/* Try to find sdvo panel data */
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static void
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parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct lvds_dvo_timing *dvo_timing;
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struct drm_display_mode *panel_fixed_mode;
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int index;
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index = i915_vbt_sdvo_panel_type;
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if (index == -1) {
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struct bdb_sdvo_lvds_options *sdvo_lvds_options;
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sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
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if (!sdvo_lvds_options)
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return;
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index = sdvo_lvds_options->panel_type;
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}
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dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
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if (!dvo_timing)
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return;
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panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
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if (!panel_fixed_mode)
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return;
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fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
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dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
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DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
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drm_mode_debug_printmodeline(panel_fixed_mode);
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}
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static int intel_bios_ssc_frequency(struct drm_device *dev,
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bool alternate)
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{
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switch (INTEL_INFO(dev)->gen) {
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case 2:
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return alternate ? 66 : 48;
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case 3:
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case 4:
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return alternate ? 100 : 96;
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default:
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return alternate ? 100 : 120;
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}
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}
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static void
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parse_general_features(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct drm_device *dev = dev_priv->dev;
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struct bdb_general_features *general;
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general = find_section(bdb, BDB_GENERAL_FEATURES);
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if (general) {
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dev_priv->int_tv_support = general->int_tv_support;
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dev_priv->int_crt_support = general->int_crt_support;
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dev_priv->lvds_use_ssc = general->enable_ssc;
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dev_priv->lvds_ssc_freq =
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intel_bios_ssc_frequency(dev, general->ssc_freq);
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dev_priv->display_clock_mode = general->display_clock_mode;
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DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d\n",
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dev_priv->int_tv_support,
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dev_priv->int_crt_support,
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dev_priv->lvds_use_ssc,
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dev_priv->lvds_ssc_freq,
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dev_priv->display_clock_mode);
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}
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}
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static void
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parse_general_definitions(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct bdb_general_definitions *general;
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general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
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if (general) {
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u16 block_size = get_blocksize(general);
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if (block_size >= sizeof(*general)) {
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int bus_pin = general->crt_ddc_gmbus_pin;
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DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
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if (bus_pin >= 1 && bus_pin <= 6)
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dev_priv->crt_ddc_pin = bus_pin;
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} else {
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DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
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block_size);
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}
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}
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}
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static void
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parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct sdvo_device_mapping *p_mapping;
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struct bdb_general_definitions *p_defs;
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struct child_device_config *p_child;
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int i, child_device_num, count;
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u16 block_size;
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p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
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if (!p_defs) {
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DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
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return;
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}
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/* judge whether the size of child device meets the requirements.
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* If the child device size obtained from general definition block
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* is different with sizeof(struct child_device_config), skip the
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* parsing of sdvo device info
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*/
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if (p_defs->child_dev_size != sizeof(*p_child)) {
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/* different child dev size . Ignore it */
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DRM_DEBUG_KMS("different child size is found. Invalid.\n");
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return;
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}
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/* get the block size of general definitions */
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block_size = get_blocksize(p_defs);
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/* get the number of child device */
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child_device_num = (block_size - sizeof(*p_defs)) /
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sizeof(*p_child);
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count = 0;
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for (i = 0; i < child_device_num; i++) {
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p_child = &(p_defs->devices[i]);
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if (!p_child->device_type) {
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/* skip the device block if device type is invalid */
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continue;
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}
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if (p_child->slave_addr != SLAVE_ADDR1 &&
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p_child->slave_addr != SLAVE_ADDR2) {
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/*
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* If the slave address is neither 0x70 nor 0x72,
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* it is not a SDVO device. Skip it.
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*/
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continue;
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}
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if (p_child->dvo_port != DEVICE_PORT_DVOB &&
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p_child->dvo_port != DEVICE_PORT_DVOC) {
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/* skip the incorrect SDVO port */
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DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
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continue;
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}
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DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
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" %s port\n",
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p_child->slave_addr,
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(p_child->dvo_port == DEVICE_PORT_DVOB) ?
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"SDVOB" : "SDVOC");
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p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
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if (!p_mapping->initialized) {
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p_mapping->dvo_port = p_child->dvo_port;
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p_mapping->slave_addr = p_child->slave_addr;
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p_mapping->dvo_wiring = p_child->dvo_wiring;
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p_mapping->ddc_pin = p_child->ddc_pin;
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p_mapping->i2c_pin = p_child->i2c_pin;
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p_mapping->initialized = 1;
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DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
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p_mapping->dvo_port,
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p_mapping->slave_addr,
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p_mapping->dvo_wiring,
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p_mapping->ddc_pin,
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p_mapping->i2c_pin);
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} else {
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DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
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"two SDVO device.\n");
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}
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if (p_child->slave2_addr) {
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/* Maybe this is a SDVO device with multiple inputs */
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/* And the mapping info is not added */
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DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
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" is a SDVO device with multiple inputs.\n");
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}
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count++;
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}
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if (!count) {
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/* No SDVO device info is found */
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DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
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}
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return;
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}
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static void
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parse_driver_features(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct drm_device *dev = dev_priv->dev;
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struct bdb_driver_features *driver;
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driver = find_section(bdb, BDB_DRIVER_FEATURES);
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if (!driver)
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return;
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if (SUPPORTS_EDP(dev) &&
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driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
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dev_priv->edp.support = 1;
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if (driver->dual_frequency)
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dev_priv->render_reclock_avail = true;
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}
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static void
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parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
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{
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struct bdb_edp *edp;
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struct edp_power_seq *edp_pps;
|
|
struct edp_link_params *edp_link_params;
|
|
|
|
edp = find_section(bdb, BDB_EDP);
|
|
if (!edp) {
|
|
if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) {
|
|
DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
|
|
"supported, assume %dbpp panel color "
|
|
"depth.\n",
|
|
dev_priv->edp.bpp);
|
|
}
|
|
return;
|
|
}
|
|
|
|
switch ((edp->color_depth >> (panel_type * 2)) & 3) {
|
|
case EDP_18BPP:
|
|
dev_priv->edp.bpp = 18;
|
|
break;
|
|
case EDP_24BPP:
|
|
dev_priv->edp.bpp = 24;
|
|
break;
|
|
case EDP_30BPP:
|
|
dev_priv->edp.bpp = 30;
|
|
break;
|
|
}
|
|
|
|
/* Get the eDP sequencing and link info */
|
|
edp_pps = &edp->power_seqs[panel_type];
|
|
edp_link_params = &edp->link_params[panel_type];
|
|
|
|
dev_priv->edp.pps = *edp_pps;
|
|
|
|
dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
|
|
DP_LINK_BW_1_62;
|
|
switch (edp_link_params->lanes) {
|
|
case 0:
|
|
dev_priv->edp.lanes = 1;
|
|
break;
|
|
case 1:
|
|
dev_priv->edp.lanes = 2;
|
|
break;
|
|
case 3:
|
|
default:
|
|
dev_priv->edp.lanes = 4;
|
|
break;
|
|
}
|
|
switch (edp_link_params->preemphasis) {
|
|
case 0:
|
|
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
|
|
break;
|
|
case 1:
|
|
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
|
|
break;
|
|
case 2:
|
|
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
|
|
break;
|
|
case 3:
|
|
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
|
|
break;
|
|
}
|
|
switch (edp_link_params->vswing) {
|
|
case 0:
|
|
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
|
|
break;
|
|
case 1:
|
|
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
|
|
break;
|
|
case 2:
|
|
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
|
|
break;
|
|
case 3:
|
|
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
parse_device_mapping(struct drm_i915_private *dev_priv,
|
|
struct bdb_header *bdb)
|
|
{
|
|
struct bdb_general_definitions *p_defs;
|
|
struct child_device_config *p_child, *child_dev_ptr;
|
|
int i, child_device_num, count;
|
|
u16 block_size;
|
|
|
|
p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
|
|
if (!p_defs) {
|
|
DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
|
|
return;
|
|
}
|
|
/* judge whether the size of child device meets the requirements.
|
|
* If the child device size obtained from general definition block
|
|
* is different with sizeof(struct child_device_config), skip the
|
|
* parsing of sdvo device info
|
|
*/
|
|
if (p_defs->child_dev_size != sizeof(*p_child)) {
|
|
/* different child dev size . Ignore it */
|
|
DRM_DEBUG_KMS("different child size is found. Invalid.\n");
|
|
return;
|
|
}
|
|
/* get the block size of general definitions */
|
|
block_size = get_blocksize(p_defs);
|
|
/* get the number of child device */
|
|
child_device_num = (block_size - sizeof(*p_defs)) /
|
|
sizeof(*p_child);
|
|
count = 0;
|
|
/* get the number of child device that is present */
|
|
for (i = 0; i < child_device_num; i++) {
|
|
p_child = &(p_defs->devices[i]);
|
|
if (!p_child->device_type) {
|
|
/* skip the device block if device type is invalid */
|
|
continue;
|
|
}
|
|
count++;
|
|
}
|
|
if (!count) {
|
|
DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
|
|
return;
|
|
}
|
|
dev_priv->child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
|
|
if (!dev_priv->child_dev) {
|
|
DRM_DEBUG_KMS("No memory space for child device\n");
|
|
return;
|
|
}
|
|
|
|
dev_priv->child_dev_num = count;
|
|
count = 0;
|
|
for (i = 0; i < child_device_num; i++) {
|
|
p_child = &(p_defs->devices[i]);
|
|
if (!p_child->device_type) {
|
|
/* skip the device block if device type is invalid */
|
|
continue;
|
|
}
|
|
child_dev_ptr = dev_priv->child_dev + count;
|
|
count++;
|
|
memcpy((void *)child_dev_ptr, (void *)p_child,
|
|
sizeof(*p_child));
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void
|
|
init_vbt_defaults(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct drm_device *dev = dev_priv->dev;
|
|
|
|
dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
|
|
|
|
/* LFP panel data */
|
|
dev_priv->lvds_dither = 1;
|
|
dev_priv->lvds_vbt = 0;
|
|
|
|
/* SDVO panel data */
|
|
dev_priv->sdvo_lvds_vbt_mode = NULL;
|
|
|
|
/* general features */
|
|
dev_priv->int_tv_support = 1;
|
|
dev_priv->int_crt_support = 1;
|
|
|
|
/* Default to using SSC */
|
|
dev_priv->lvds_use_ssc = 1;
|
|
dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
|
|
DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq);
|
|
|
|
/* eDP data */
|
|
dev_priv->edp.bpp = 18;
|
|
}
|
|
|
|
/**
|
|
* intel_parse_bios - find VBT and initialize settings from the BIOS
|
|
* @dev: DRM device
|
|
*
|
|
* Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
|
|
* to appropriate values.
|
|
*
|
|
* Returns 0 on success, nonzero on failure.
|
|
*/
|
|
bool
|
|
intel_parse_bios(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct pci_dev *pdev = dev->pdev;
|
|
struct bdb_header *bdb = NULL;
|
|
u8 __iomem *bios = NULL;
|
|
|
|
init_vbt_defaults(dev_priv);
|
|
|
|
/* XXX Should this validation be moved to intel_opregion.c? */
|
|
if (dev_priv->opregion.vbt) {
|
|
struct vbt_header *vbt = dev_priv->opregion.vbt;
|
|
if (memcmp(vbt->signature, "$VBT", 4) == 0) {
|
|
DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
|
|
vbt->signature);
|
|
bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
|
|
} else
|
|
dev_priv->opregion.vbt = NULL;
|
|
}
|
|
|
|
if (bdb == NULL) {
|
|
struct vbt_header *vbt = NULL;
|
|
size_t size;
|
|
int i;
|
|
|
|
bios = pci_map_rom(pdev, &size);
|
|
if (!bios)
|
|
return -1;
|
|
|
|
/* Scour memory looking for the VBT signature */
|
|
for (i = 0; i + 4 < size; i++) {
|
|
if (!memcmp(bios + i, "$VBT", 4)) {
|
|
vbt = (struct vbt_header *)(bios + i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!vbt) {
|
|
DRM_DEBUG_DRIVER("VBT signature missing\n");
|
|
pci_unmap_rom(pdev, bios);
|
|
return -1;
|
|
}
|
|
|
|
bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
|
|
}
|
|
|
|
/* Grab useful general definitions */
|
|
parse_general_features(dev_priv, bdb);
|
|
parse_general_definitions(dev_priv, bdb);
|
|
parse_lfp_panel_data(dev_priv, bdb);
|
|
parse_sdvo_panel_data(dev_priv, bdb);
|
|
parse_sdvo_device_mapping(dev_priv, bdb);
|
|
parse_device_mapping(dev_priv, bdb);
|
|
parse_driver_features(dev_priv, bdb);
|
|
parse_edp(dev_priv, bdb);
|
|
|
|
if (bios)
|
|
pci_unmap_rom(pdev, bios);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Ensure that vital registers have been initialised, even if the BIOS
|
|
* is absent or just failing to do its job.
|
|
*/
|
|
void intel_setup_bios(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
/* Set the Panel Power On/Off timings if uninitialized. */
|
|
if ((I915_READ(PP_ON_DELAYS) == 0) && (I915_READ(PP_OFF_DELAYS) == 0)) {
|
|
/* Set T2 to 40ms and T5 to 200ms */
|
|
I915_WRITE(PP_ON_DELAYS, 0x019007d0);
|
|
|
|
/* Set T3 to 35ms and Tx to 200ms */
|
|
I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
|
|
}
|
|
}
|