![Duncan Laurie](/assets/img/avatar_default.png)
We had been using a DMI table workaround to select the right frequency for devices, but this is fragile and must be updated with every new platform. Instead the default case when VBT is missing is changed to use 120MHz clock for LVDS SSC for these generations. The docs for 2010-Core, SandyBridge, and IvyBridge all indicate that the reference frequency for LVDS is 120MHz: "2010 Core" http://intellinuxgraphics.org/IHD_OS_Vol3_Part3r2.pdf page 38 Reference Frequency: 120MHz for CRT and LVDS. 100MHz for the FDI. "2011 SandyBridge" http://intellinuxgraphics.org/documentation/SNB/IHD_OS_Vol3_Part3.pdf page 33 Reference Frequency: 120MHz for CRT, HDMI, LVDS. 100MHz for the FDI. "2012 IvyBridge" http://intellinuxgraphics.org/documentation/IVB/IHD_OS_Vol3_Part4.pdf page 27 Reference Frequency: 120 MHz for CRT, HDMI, LVDS, 100MHz for the FDI. Signed-off-by: Duncan Laurie <dlaurie@chromium.org> [olof: Fixup for recent base, switched from if/else to single call] Signed-off-by: Olof Johansson <olof@lixom.net> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
928 lines
26 KiB
C
928 lines
26 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 <linux/dmi.h>
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#include <drm/drm_dp_helper.h>
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#include <drm/drmP.h>
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#include <drm/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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/* get lvds_fp_timing entry
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* this function may return NULL if the corresponding entry is invalid
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*/
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static const struct lvds_fp_timing *
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get_lvds_fp_timing(const struct bdb_header *bdb,
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const struct bdb_lvds_lfp_data *data,
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const struct bdb_lvds_lfp_data_ptrs *ptrs,
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int index)
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{
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size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
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u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
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size_t ofs;
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if (index >= ARRAY_SIZE(ptrs->ptr))
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return NULL;
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ofs = ptrs->ptr[index].fp_timing_offset;
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if (ofs < data_ofs ||
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ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
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return NULL;
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return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
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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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const struct lvds_fp_timing *fp_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->vbt.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->vbt.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->vbt.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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fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
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lvds_lfp_data_ptrs,
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lvds_options->panel_type);
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if (fp_timing) {
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/* check the resolution, just to be sure */
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if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
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fp_timing->y_res == panel_fixed_mode->vdisplay) {
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dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
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DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
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dev_priv->vbt.bios_lvds_val);
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}
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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 == -2) {
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DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
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return;
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}
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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->vbt.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->vbt.int_tv_support = general->int_tv_support;
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dev_priv->vbt.int_crt_support = general->int_crt_support;
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dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
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dev_priv->vbt.lvds_ssc_freq =
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intel_bios_ssc_frequency(dev, general->ssc_freq);
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dev_priv->vbt.display_clock_mode = general->display_clock_mode;
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dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
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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 fdi_rx_polarity_inverted %d\n",
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dev_priv->vbt.int_tv_support,
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dev_priv->vbt.int_crt_support,
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dev_priv->vbt.lvds_use_ssc,
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dev_priv->vbt.lvds_ssc_freq,
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dev_priv->vbt.display_clock_mode,
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dev_priv->vbt.fdi_rx_polarity_inverted);
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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 (intel_gmbus_is_port_valid(bus_pin))
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dev_priv->vbt.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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union 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->old.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->old.slave_addr != SLAVE_ADDR1 &&
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p_child->old.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->old.dvo_port != DEVICE_PORT_DVOB &&
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p_child->old.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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}
|
|
DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
|
|
" %s port\n",
|
|
p_child->old.slave_addr,
|
|
(p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
|
|
"SDVOB" : "SDVOC");
|
|
p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
|
|
if (!p_mapping->initialized) {
|
|
p_mapping->dvo_port = p_child->old.dvo_port;
|
|
p_mapping->slave_addr = p_child->old.slave_addr;
|
|
p_mapping->dvo_wiring = p_child->old.dvo_wiring;
|
|
p_mapping->ddc_pin = p_child->old.ddc_pin;
|
|
p_mapping->i2c_pin = p_child->old.i2c_pin;
|
|
p_mapping->initialized = 1;
|
|
DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
|
|
p_mapping->dvo_port,
|
|
p_mapping->slave_addr,
|
|
p_mapping->dvo_wiring,
|
|
p_mapping->ddc_pin,
|
|
p_mapping->i2c_pin);
|
|
} else {
|
|
DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
|
|
"two SDVO device.\n");
|
|
}
|
|
if (p_child->old.slave2_addr) {
|
|
/* Maybe this is a SDVO device with multiple inputs */
|
|
/* And the mapping info is not added */
|
|
DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
|
|
" is a SDVO device with multiple inputs.\n");
|
|
}
|
|
count++;
|
|
}
|
|
|
|
if (!count) {
|
|
/* No SDVO device info is found */
|
|
DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void
|
|
parse_driver_features(struct drm_i915_private *dev_priv,
|
|
struct bdb_header *bdb)
|
|
{
|
|
struct bdb_driver_features *driver;
|
|
|
|
driver = find_section(bdb, BDB_DRIVER_FEATURES);
|
|
if (!driver)
|
|
return;
|
|
|
|
if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
|
|
dev_priv->vbt.edp_support = 1;
|
|
|
|
if (driver->dual_frequency)
|
|
dev_priv->render_reclock_avail = true;
|
|
}
|
|
|
|
static void
|
|
parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
|
|
{
|
|
struct bdb_edp *edp;
|
|
struct edp_power_seq *edp_pps;
|
|
struct edp_link_params *edp_link_params;
|
|
|
|
edp = find_section(bdb, BDB_EDP);
|
|
if (!edp) {
|
|
if (dev_priv->vbt.edp_support)
|
|
DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
|
|
return;
|
|
}
|
|
|
|
switch ((edp->color_depth >> (panel_type * 2)) & 3) {
|
|
case EDP_18BPP:
|
|
dev_priv->vbt.edp_bpp = 18;
|
|
break;
|
|
case EDP_24BPP:
|
|
dev_priv->vbt.edp_bpp = 24;
|
|
break;
|
|
case EDP_30BPP:
|
|
dev_priv->vbt.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->vbt.edp_pps = *edp_pps;
|
|
|
|
dev_priv->vbt.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->vbt.edp_lanes = 1;
|
|
break;
|
|
case 1:
|
|
dev_priv->vbt.edp_lanes = 2;
|
|
break;
|
|
case 3:
|
|
default:
|
|
dev_priv->vbt.edp_lanes = 4;
|
|
break;
|
|
}
|
|
switch (edp_link_params->preemphasis) {
|
|
case 0:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
|
|
break;
|
|
case 1:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
|
|
break;
|
|
case 2:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
|
|
break;
|
|
case 3:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
|
|
break;
|
|
}
|
|
switch (edp_link_params->vswing) {
|
|
case 0:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400;
|
|
break;
|
|
case 1:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600;
|
|
break;
|
|
case 2:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800;
|
|
break;
|
|
case 3:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
|
|
{
|
|
struct bdb_mipi *mipi;
|
|
|
|
mipi = find_section(bdb, BDB_MIPI);
|
|
if (!mipi) {
|
|
DRM_DEBUG_KMS("No MIPI BDB found");
|
|
return;
|
|
}
|
|
|
|
/* XXX: add more info */
|
|
dev_priv->vbt.dsi.panel_id = mipi->panel_id;
|
|
}
|
|
|
|
static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
|
|
struct bdb_header *bdb)
|
|
{
|
|
union child_device_config *it, *child = NULL;
|
|
struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
|
|
uint8_t hdmi_level_shift;
|
|
int i, j;
|
|
bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
|
|
uint8_t aux_channel;
|
|
/* Each DDI port can have more than one value on the "DVO Port" field,
|
|
* so look for all the possible values for each port and abort if more
|
|
* than one is found. */
|
|
int dvo_ports[][2] = {
|
|
{DVO_PORT_HDMIA, DVO_PORT_DPA},
|
|
{DVO_PORT_HDMIB, DVO_PORT_DPB},
|
|
{DVO_PORT_HDMIC, DVO_PORT_DPC},
|
|
{DVO_PORT_HDMID, DVO_PORT_DPD},
|
|
{DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
|
|
};
|
|
|
|
/* Find the child device to use, abort if more than one found. */
|
|
for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
|
|
it = dev_priv->vbt.child_dev + i;
|
|
|
|
for (j = 0; j < 2; j++) {
|
|
if (dvo_ports[port][j] == -1)
|
|
break;
|
|
|
|
if (it->common.dvo_port == dvo_ports[port][j]) {
|
|
if (child) {
|
|
DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
|
|
port_name(port));
|
|
return;
|
|
}
|
|
child = it;
|
|
}
|
|
}
|
|
}
|
|
if (!child)
|
|
return;
|
|
|
|
aux_channel = child->raw[25];
|
|
|
|
is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
|
|
is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
|
|
is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
|
|
is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
|
|
is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
|
|
|
|
info->supports_dvi = is_dvi;
|
|
info->supports_hdmi = is_hdmi;
|
|
info->supports_dp = is_dp;
|
|
|
|
DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
|
|
port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
|
|
|
|
if (is_edp && is_dvi)
|
|
DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
|
|
port_name(port));
|
|
if (is_crt && port != PORT_E)
|
|
DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
|
|
if (is_crt && (is_dvi || is_dp))
|
|
DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
|
|
port_name(port));
|
|
if (is_dvi && (port == PORT_A || port == PORT_E))
|
|
DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port));
|
|
if (!is_dvi && !is_dp && !is_crt)
|
|
DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
|
|
port_name(port));
|
|
if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
|
|
DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
|
|
|
|
if (is_dvi) {
|
|
if (child->common.ddc_pin == 0x05 && port != PORT_B)
|
|
DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
|
|
if (child->common.ddc_pin == 0x04 && port != PORT_C)
|
|
DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
|
|
if (child->common.ddc_pin == 0x06 && port != PORT_D)
|
|
DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
|
|
}
|
|
|
|
if (is_dp) {
|
|
if (aux_channel == 0x40 && port != PORT_A)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
|
|
if (aux_channel == 0x10 && port != PORT_B)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
|
|
if (aux_channel == 0x20 && port != PORT_C)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
|
|
if (aux_channel == 0x30 && port != PORT_D)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
|
|
}
|
|
|
|
if (bdb->version >= 158) {
|
|
/* The VBT HDMI level shift values match the table we have. */
|
|
hdmi_level_shift = child->raw[7] & 0xF;
|
|
if (hdmi_level_shift < 0xC) {
|
|
DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
|
|
port_name(port),
|
|
hdmi_level_shift);
|
|
info->hdmi_level_shift = hdmi_level_shift;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void parse_ddi_ports(struct drm_i915_private *dev_priv,
|
|
struct bdb_header *bdb)
|
|
{
|
|
struct drm_device *dev = dev_priv->dev;
|
|
enum port port;
|
|
|
|
if (!HAS_DDI(dev))
|
|
return;
|
|
|
|
if (!dev_priv->vbt.child_dev_num)
|
|
return;
|
|
|
|
if (bdb->version < 155)
|
|
return;
|
|
|
|
for (port = PORT_A; port < I915_MAX_PORTS; port++)
|
|
parse_ddi_port(dev_priv, port, bdb);
|
|
}
|
|
|
|
static void
|
|
parse_device_mapping(struct drm_i915_private *dev_priv,
|
|
struct bdb_header *bdb)
|
|
{
|
|
struct bdb_general_definitions *p_defs;
|
|
union 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->common.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->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
|
|
if (!dev_priv->vbt.child_dev) {
|
|
DRM_DEBUG_KMS("No memory space for child device\n");
|
|
return;
|
|
}
|
|
|
|
dev_priv->vbt.child_dev_num = count;
|
|
count = 0;
|
|
for (i = 0; i < child_device_num; i++) {
|
|
p_child = &(p_defs->devices[i]);
|
|
if (!p_child->common.device_type) {
|
|
/* skip the device block if device type is invalid */
|
|
continue;
|
|
}
|
|
child_dev_ptr = dev_priv->vbt.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;
|
|
enum port port;
|
|
|
|
dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
|
|
|
|
/* LFP panel data */
|
|
dev_priv->vbt.lvds_dither = 1;
|
|
dev_priv->vbt.lvds_vbt = 0;
|
|
|
|
/* SDVO panel data */
|
|
dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
|
|
|
|
/* general features */
|
|
dev_priv->vbt.int_tv_support = 1;
|
|
dev_priv->vbt.int_crt_support = 1;
|
|
|
|
/* Default to using SSC */
|
|
dev_priv->vbt.lvds_use_ssc = 1;
|
|
/*
|
|
* Core/SandyBridge/IvyBridge use alternative (120MHz) reference
|
|
* clock for LVDS.
|
|
*/
|
|
dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
|
|
!HAS_PCH_SPLIT(dev));
|
|
DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->vbt.lvds_ssc_freq);
|
|
|
|
for (port = PORT_A; port < I915_MAX_PORTS; port++) {
|
|
struct ddi_vbt_port_info *info =
|
|
&dev_priv->vbt.ddi_port_info[port];
|
|
|
|
/* Recommended BSpec default: 800mV 0dB. */
|
|
info->hdmi_level_shift = 6;
|
|
|
|
info->supports_dvi = (port != PORT_A && port != PORT_E);
|
|
info->supports_hdmi = info->supports_dvi;
|
|
info->supports_dp = (port != PORT_E);
|
|
}
|
|
}
|
|
|
|
static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
|
|
{
|
|
DRM_DEBUG_KMS("Falling back to manually reading VBT from "
|
|
"VBIOS ROM for %s\n",
|
|
id->ident);
|
|
return 1;
|
|
}
|
|
|
|
static const struct dmi_system_id intel_no_opregion_vbt[] = {
|
|
{
|
|
.callback = intel_no_opregion_vbt_callback,
|
|
.ident = "ThinkCentre A57",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
|
|
},
|
|
},
|
|
{ }
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
int
|
|
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;
|
|
|
|
if (HAS_PCH_NOP(dev))
|
|
return -ENODEV;
|
|
|
|
init_vbt_defaults(dev_priv);
|
|
|
|
/* XXX Should this validation be moved to intel_opregion.c? */
|
|
if (!dmi_check_system(intel_no_opregion_vbt) && 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);
|
|
parse_mipi(dev_priv, bdb);
|
|
parse_ddi_ports(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 (!HAS_PCH_SPLIT(dev) &&
|
|
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);
|
|
}
|
|
}
|