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![Jani Nikula](/assets/img/avatar_default.png)
Slightly cleaner with early exit. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1450271061-32646-4-git-send-email-jani.nikula@intel.com
1347 lines
38 KiB
C
1347 lines
38 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 <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 const void *
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find_section(const void *_bdb, int section_id)
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{
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const struct bdb_header *bdb = _bdb;
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const u8 *base = _bdb;
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int index = 0;
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u32 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 + 3 < total) {
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current_id = *(base + index);
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index++;
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current_size = *((const u16 *)(base + index));
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index += 2;
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/* The MIPI Sequence Block v3+ has a separate size field. */
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if (current_id == BDB_MIPI_SEQUENCE && *(base + index) >= 3)
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current_size = *((const u32 *)(base + index + 1));
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if (index + current_size > total)
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return NULL;
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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(const 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 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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const 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 drrs_mode;
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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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drrs_mode = (lvds_options->dps_panel_type_bits
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>> (panel_type * 2)) & MODE_MASK;
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/*
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* VBT has static DRRS = 0 and seamless DRRS = 2.
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* The below piece of code is required to adjust vbt.drrs_type
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* to match the enum drrs_support_type.
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*/
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switch (drrs_mode) {
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case 0:
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dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
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DRM_DEBUG_KMS("DRRS supported mode is static\n");
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break;
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case 2:
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dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
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DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
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break;
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default:
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dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
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DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
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break;
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}
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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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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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static void
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parse_lfp_backlight(struct drm_i915_private *dev_priv,
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const struct bdb_header *bdb)
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{
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const struct bdb_lfp_backlight_data *backlight_data;
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const struct bdb_lfp_backlight_data_entry *entry;
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backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
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if (!backlight_data)
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return;
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if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
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DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
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backlight_data->entry_size);
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return;
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}
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entry = &backlight_data->data[panel_type];
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dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
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if (!dev_priv->vbt.backlight.present) {
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DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
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entry->type);
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return;
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}
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dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
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dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
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dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
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DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
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"active %s, min brightness %u, level %u\n",
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dev_priv->vbt.backlight.pwm_freq_hz,
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dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
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dev_priv->vbt.backlight.min_brightness,
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backlight_data->level[panel_type]);
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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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const struct bdb_header *bdb)
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{
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const 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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const 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_i915_private *dev_priv,
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bool alternate)
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{
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switch (INTEL_INFO(dev_priv)->gen) {
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case 2:
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return alternate ? 66667 : 48000;
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case 3:
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case 4:
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return alternate ? 100000 : 96000;
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default:
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return alternate ? 100000 : 120000;
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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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const struct bdb_header *bdb)
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{
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const 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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return;
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dev_priv->vbt.int_tv_support = general->int_tv_support;
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/* int_crt_support can't be trusted on earlier platforms */
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if (bdb->version >= 155 &&
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(HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
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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_priv, 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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static void
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parse_general_definitions(struct drm_i915_private *dev_priv,
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const struct bdb_header *bdb)
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{
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const 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_valid_pin(dev_priv, 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 const union child_device_config *
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child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
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{
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return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
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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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const struct bdb_header *bdb)
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{
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struct sdvo_device_mapping *p_mapping;
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const struct bdb_general_definitions *p_defs;
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const struct old_child_dev_config *child; /* legacy */
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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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/*
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* Only parse SDVO mappings when the general definitions block child
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* device size matches that of the *legacy* child device config
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* struct. Thus, SDVO mapping will be skipped for newer VBT.
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*/
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if (p_defs->child_dev_size != sizeof(*child)) {
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DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\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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p_defs->child_dev_size;
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count = 0;
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for (i = 0; i < child_device_num; i++) {
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child = &child_device_ptr(p_defs, i)->old;
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if (!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 (child->slave_addr != SLAVE_ADDR1 &&
|
|
child->slave_addr != SLAVE_ADDR2) {
|
|
/*
|
|
* If the slave address is neither 0x70 nor 0x72,
|
|
* it is not a SDVO device. Skip it.
|
|
*/
|
|
continue;
|
|
}
|
|
if (child->dvo_port != DEVICE_PORT_DVOB &&
|
|
child->dvo_port != DEVICE_PORT_DVOC) {
|
|
/* skip the incorrect SDVO port */
|
|
DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
|
|
continue;
|
|
}
|
|
DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
|
|
" %s port\n",
|
|
child->slave_addr,
|
|
(child->dvo_port == DEVICE_PORT_DVOB) ?
|
|
"SDVOB" : "SDVOC");
|
|
p_mapping = &(dev_priv->sdvo_mappings[child->dvo_port - 1]);
|
|
if (!p_mapping->initialized) {
|
|
p_mapping->dvo_port = child->dvo_port;
|
|
p_mapping->slave_addr = child->slave_addr;
|
|
p_mapping->dvo_wiring = child->dvo_wiring;
|
|
p_mapping->ddc_pin = child->ddc_pin;
|
|
p_mapping->i2c_pin = child->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 (child->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,
|
|
const struct bdb_header *bdb)
|
|
{
|
|
const 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;
|
|
|
|
DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
|
|
/*
|
|
* If DRRS is not supported, drrs_type has to be set to 0.
|
|
* This is because, VBT is configured in such a way that
|
|
* static DRRS is 0 and DRRS not supported is represented by
|
|
* driver->drrs_enabled=false
|
|
*/
|
|
if (!driver->drrs_enabled)
|
|
dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
|
|
}
|
|
|
|
static void
|
|
parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
|
|
{
|
|
const struct bdb_edp *edp;
|
|
const struct edp_power_seq *edp_pps;
|
|
const 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;
|
|
|
|
switch (edp_link_params->rate) {
|
|
case EDP_RATE_1_62:
|
|
dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
|
|
break;
|
|
case EDP_RATE_2_7:
|
|
dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
|
|
break;
|
|
default:
|
|
DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
|
|
edp_link_params->rate);
|
|
break;
|
|
}
|
|
|
|
switch (edp_link_params->lanes) {
|
|
case EDP_LANE_1:
|
|
dev_priv->vbt.edp_lanes = 1;
|
|
break;
|
|
case EDP_LANE_2:
|
|
dev_priv->vbt.edp_lanes = 2;
|
|
break;
|
|
case EDP_LANE_4:
|
|
dev_priv->vbt.edp_lanes = 4;
|
|
break;
|
|
default:
|
|
DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
|
|
edp_link_params->lanes);
|
|
break;
|
|
}
|
|
|
|
switch (edp_link_params->preemphasis) {
|
|
case EDP_PREEMPHASIS_NONE:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
break;
|
|
case EDP_PREEMPHASIS_3_5dB:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
|
|
break;
|
|
case EDP_PREEMPHASIS_6dB:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
break;
|
|
case EDP_PREEMPHASIS_9_5dB:
|
|
dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
|
|
break;
|
|
default:
|
|
DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
|
|
edp_link_params->preemphasis);
|
|
break;
|
|
}
|
|
|
|
switch (edp_link_params->vswing) {
|
|
case EDP_VSWING_0_4V:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
|
|
break;
|
|
case EDP_VSWING_0_6V:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
|
|
break;
|
|
case EDP_VSWING_0_8V:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
|
|
break;
|
|
case EDP_VSWING_1_2V:
|
|
dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
|
|
break;
|
|
default:
|
|
DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
|
|
edp_link_params->vswing);
|
|
break;
|
|
}
|
|
|
|
if (bdb->version >= 173) {
|
|
uint8_t vswing;
|
|
|
|
/* Don't read from VBT if module parameter has valid value*/
|
|
if (i915.edp_vswing) {
|
|
dev_priv->edp_low_vswing = i915.edp_vswing == 1;
|
|
} else {
|
|
vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
|
|
dev_priv->edp_low_vswing = vswing == 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
|
|
{
|
|
const struct bdb_psr *psr;
|
|
const struct psr_table *psr_table;
|
|
|
|
psr = find_section(bdb, BDB_PSR);
|
|
if (!psr) {
|
|
DRM_DEBUG_KMS("No PSR BDB found.\n");
|
|
return;
|
|
}
|
|
|
|
psr_table = &psr->psr_table[panel_type];
|
|
|
|
dev_priv->vbt.psr.full_link = psr_table->full_link;
|
|
dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
|
|
|
|
/* Allowed VBT values goes from 0 to 15 */
|
|
dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
|
|
psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
|
|
|
|
switch (psr_table->lines_to_wait) {
|
|
case 0:
|
|
dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
|
|
break;
|
|
case 1:
|
|
dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
|
|
break;
|
|
case 2:
|
|
dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
|
|
break;
|
|
case 3:
|
|
dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
|
|
break;
|
|
default:
|
|
DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
|
|
psr_table->lines_to_wait);
|
|
break;
|
|
}
|
|
|
|
dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
|
|
dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
|
|
}
|
|
|
|
static u8 *goto_next_sequence(u8 *data, int *size)
|
|
{
|
|
u16 len;
|
|
int tmp = *size;
|
|
|
|
if (--tmp < 0)
|
|
return NULL;
|
|
|
|
/* goto first element */
|
|
data++;
|
|
while (1) {
|
|
switch (*data) {
|
|
case MIPI_SEQ_ELEM_SEND_PKT:
|
|
/*
|
|
* skip by this element payload size
|
|
* skip elem id, command flag and data type
|
|
*/
|
|
tmp -= 5;
|
|
if (tmp < 0)
|
|
return NULL;
|
|
|
|
data += 3;
|
|
len = *((u16 *)data);
|
|
|
|
tmp -= len;
|
|
if (tmp < 0)
|
|
return NULL;
|
|
|
|
/* skip by len */
|
|
data = data + 2 + len;
|
|
break;
|
|
case MIPI_SEQ_ELEM_DELAY:
|
|
/* skip by elem id, and delay is 4 bytes */
|
|
tmp -= 5;
|
|
if (tmp < 0)
|
|
return NULL;
|
|
|
|
data += 5;
|
|
break;
|
|
case MIPI_SEQ_ELEM_GPIO:
|
|
tmp -= 3;
|
|
if (tmp < 0)
|
|
return NULL;
|
|
|
|
data += 3;
|
|
break;
|
|
default:
|
|
DRM_ERROR("Unknown element\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* end of sequence ? */
|
|
if (*data == 0)
|
|
break;
|
|
}
|
|
|
|
/* goto next sequence or end of block byte */
|
|
if (--tmp < 0)
|
|
return NULL;
|
|
|
|
data++;
|
|
|
|
/* update amount of data left for the sequence block to be parsed */
|
|
*size = tmp;
|
|
return data;
|
|
}
|
|
|
|
static void
|
|
parse_mipi(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
|
|
{
|
|
const struct bdb_mipi_config *start;
|
|
const struct bdb_mipi_sequence *sequence;
|
|
const struct mipi_config *config;
|
|
const struct mipi_pps_data *pps;
|
|
u8 *data;
|
|
const u8 *seq_data;
|
|
int i, panel_id, seq_size;
|
|
u16 block_size;
|
|
|
|
/* parse MIPI blocks only if LFP type is MIPI */
|
|
if (!dev_priv->vbt.has_mipi)
|
|
return;
|
|
|
|
/* Initialize this to undefined indicating no generic MIPI support */
|
|
dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
|
|
|
|
/* Block #40 is already parsed and panel_fixed_mode is
|
|
* stored in dev_priv->lfp_lvds_vbt_mode
|
|
* resuse this when needed
|
|
*/
|
|
|
|
/* Parse #52 for panel index used from panel_type already
|
|
* parsed
|
|
*/
|
|
start = find_section(bdb, BDB_MIPI_CONFIG);
|
|
if (!start) {
|
|
DRM_DEBUG_KMS("No MIPI config BDB found");
|
|
return;
|
|
}
|
|
|
|
DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
|
|
panel_type);
|
|
|
|
/*
|
|
* get hold of the correct configuration block and pps data as per
|
|
* the panel_type as index
|
|
*/
|
|
config = &start->config[panel_type];
|
|
pps = &start->pps[panel_type];
|
|
|
|
/* store as of now full data. Trim when we realise all is not needed */
|
|
dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
|
|
if (!dev_priv->vbt.dsi.config)
|
|
return;
|
|
|
|
dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
|
|
if (!dev_priv->vbt.dsi.pps) {
|
|
kfree(dev_priv->vbt.dsi.config);
|
|
return;
|
|
}
|
|
|
|
/* We have mandatory mipi config blocks. Initialize as generic panel */
|
|
dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
|
|
|
|
/* Check if we have sequence block as well */
|
|
sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
|
|
if (!sequence) {
|
|
DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
|
|
return;
|
|
}
|
|
|
|
/* Fail gracefully for forward incompatible sequence block. */
|
|
if (sequence->version >= 3) {
|
|
DRM_ERROR("Unable to parse MIPI Sequence Block v3+\n");
|
|
return;
|
|
}
|
|
|
|
DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
|
|
|
|
block_size = get_blocksize(sequence);
|
|
|
|
/*
|
|
* parse the sequence block for individual sequences
|
|
*/
|
|
dev_priv->vbt.dsi.seq_version = sequence->version;
|
|
|
|
seq_data = &sequence->data[0];
|
|
|
|
/*
|
|
* sequence block is variable length and hence we need to parse and
|
|
* get the sequence data for specific panel id
|
|
*/
|
|
for (i = 0; i < MAX_MIPI_CONFIGURATIONS; i++) {
|
|
panel_id = *seq_data;
|
|
seq_size = *((u16 *) (seq_data + 1));
|
|
if (panel_id == panel_type)
|
|
break;
|
|
|
|
/* skip the sequence including seq header of 3 bytes */
|
|
seq_data = seq_data + 3 + seq_size;
|
|
if ((seq_data - &sequence->data[0]) > block_size) {
|
|
DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (i == MAX_MIPI_CONFIGURATIONS) {
|
|
DRM_ERROR("Sequence block detected but no valid configuration\n");
|
|
return;
|
|
}
|
|
|
|
/* check if found sequence is completely within the sequence block
|
|
* just being paranoid */
|
|
if (seq_size > block_size) {
|
|
DRM_ERROR("Corrupted sequence/size, bailing out\n");
|
|
return;
|
|
}
|
|
|
|
/* skip the panel id(1 byte) and seq size(2 bytes) */
|
|
dev_priv->vbt.dsi.data = kmemdup(seq_data + 3, seq_size, GFP_KERNEL);
|
|
if (!dev_priv->vbt.dsi.data)
|
|
return;
|
|
|
|
/*
|
|
* loop into the sequence data and split into multiple sequneces
|
|
* There are only 5 types of sequences as of now
|
|
*/
|
|
data = dev_priv->vbt.dsi.data;
|
|
dev_priv->vbt.dsi.size = seq_size;
|
|
|
|
/* two consecutive 0x00 indicate end of all sequences */
|
|
while (1) {
|
|
int seq_id = *data;
|
|
if (MIPI_SEQ_MAX > seq_id && seq_id > MIPI_SEQ_UNDEFINED) {
|
|
dev_priv->vbt.dsi.sequence[seq_id] = data;
|
|
DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id);
|
|
} else {
|
|
DRM_ERROR("undefined sequence\n");
|
|
goto err;
|
|
}
|
|
|
|
/* partial parsing to skip elements */
|
|
data = goto_next_sequence(data, &seq_size);
|
|
|
|
if (data == NULL) {
|
|
DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
|
|
goto err;
|
|
}
|
|
|
|
if (*data == 0)
|
|
break; /* end of sequence reached */
|
|
}
|
|
|
|
DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
|
|
return;
|
|
err:
|
|
kfree(dev_priv->vbt.dsi.data);
|
|
dev_priv->vbt.dsi.data = NULL;
|
|
|
|
/* error during parsing so set all pointers to null
|
|
* because of partial parsing */
|
|
memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
|
|
}
|
|
|
|
static u8 translate_iboost(u8 val)
|
|
{
|
|
static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
|
|
|
|
if (val >= ARRAY_SIZE(mapping)) {
|
|
DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
|
|
return 0;
|
|
}
|
|
return mapping[val];
|
|
}
|
|
|
|
static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
|
|
const 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, ddc_pin;
|
|
/* 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[][3] = {
|
|
{DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
|
|
{DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
|
|
{DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
|
|
{DVO_PORT_HDMID, DVO_PORT_DPD, -1},
|
|
{DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
|
|
};
|
|
|
|
/* 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 < 3; 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];
|
|
ddc_pin = child->common.ddc_pin;
|
|
|
|
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 compatible\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 (port == PORT_E) {
|
|
info->alternate_ddc_pin = ddc_pin;
|
|
/* if DDIE share ddc pin with other port, then
|
|
* dvi/hdmi couldn't exist on the shared port.
|
|
* Otherwise they share the same ddc bin and system
|
|
* couldn't communicate with them seperately. */
|
|
if (ddc_pin == DDC_PIN_B) {
|
|
dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
|
|
dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
|
|
} else if (ddc_pin == DDC_PIN_C) {
|
|
dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
|
|
dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
|
|
} else if (ddc_pin == DDC_PIN_D) {
|
|
dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
|
|
dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
|
|
}
|
|
} else if (ddc_pin == DDC_PIN_B && port != PORT_B)
|
|
DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
|
|
else if (ddc_pin == DDC_PIN_C && port != PORT_C)
|
|
DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
|
|
else if (ddc_pin == DDC_PIN_D && port != PORT_D)
|
|
DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
|
|
}
|
|
|
|
if (is_dp) {
|
|
if (port == PORT_E) {
|
|
info->alternate_aux_channel = aux_channel;
|
|
/* if DDIE share aux channel with other port, then
|
|
* DP couldn't exist on the shared port. Otherwise
|
|
* they share the same aux channel and system
|
|
* couldn't communicate with them seperately. */
|
|
if (aux_channel == DP_AUX_A)
|
|
dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0;
|
|
else if (aux_channel == DP_AUX_B)
|
|
dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0;
|
|
else if (aux_channel == DP_AUX_C)
|
|
dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0;
|
|
else if (aux_channel == DP_AUX_D)
|
|
dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0;
|
|
}
|
|
else if (aux_channel == DP_AUX_A && port != PORT_A)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
|
|
else if (aux_channel == DP_AUX_B && port != PORT_B)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
|
|
else if (aux_channel == DP_AUX_C && port != PORT_C)
|
|
DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
|
|
else if (aux_channel == DP_AUX_D && 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;
|
|
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;
|
|
}
|
|
|
|
/* Parse the I_boost config for SKL and above */
|
|
if (bdb->version >= 196 && (child->common.flags_1 & IBOOST_ENABLE)) {
|
|
info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
|
|
DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
|
|
port_name(port), info->dp_boost_level);
|
|
info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
|
|
DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
|
|
port_name(port), info->hdmi_boost_level);
|
|
}
|
|
}
|
|
|
|
static void parse_ddi_ports(struct drm_i915_private *dev_priv,
|
|
const struct bdb_header *bdb)
|
|
{
|
|
enum port port;
|
|
|
|
if (!HAS_DDI(dev_priv))
|
|
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,
|
|
const struct bdb_header *bdb)
|
|
{
|
|
const struct bdb_general_definitions *p_defs;
|
|
const union child_device_config *p_child;
|
|
union child_device_config *child_dev_ptr;
|
|
int i, child_device_num, count;
|
|
u8 expected_size;
|
|
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;
|
|
}
|
|
if (bdb->version < 195) {
|
|
expected_size = sizeof(struct old_child_dev_config);
|
|
} else if (bdb->version == 195) {
|
|
expected_size = 37;
|
|
} else if (bdb->version <= 197) {
|
|
expected_size = 38;
|
|
} else {
|
|
expected_size = 38;
|
|
BUILD_BUG_ON(sizeof(*p_child) < 38);
|
|
DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
|
|
bdb->version, expected_size);
|
|
}
|
|
|
|
/* The legacy sized child device config is the minimum we need. */
|
|
if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
|
|
DRM_ERROR("Child device config size %u is too small.\n",
|
|
p_defs->child_dev_size);
|
|
return;
|
|
}
|
|
|
|
/* Flag an error for unexpected size, but continue anyway. */
|
|
if (p_defs->child_dev_size != expected_size)
|
|
DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
|
|
p_defs->child_dev_size, expected_size, bdb->version);
|
|
|
|
/* 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)) /
|
|
p_defs->child_dev_size;
|
|
count = 0;
|
|
/* get the number of child device that is present */
|
|
for (i = 0; i < child_device_num; i++) {
|
|
p_child = child_device_ptr(p_defs, 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 = child_device_ptr(p_defs, i);
|
|
if (!p_child->common.device_type) {
|
|
/* skip the device block if device type is invalid */
|
|
continue;
|
|
}
|
|
|
|
if (p_child->common.dvo_port >= DVO_PORT_MIPIA
|
|
&& p_child->common.dvo_port <= DVO_PORT_MIPID
|
|
&&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
|
|
DRM_DEBUG_KMS("Found MIPI as LFP\n");
|
|
dev_priv->vbt.has_mipi = 1;
|
|
dev_priv->vbt.dsi.port = p_child->common.dvo_port;
|
|
}
|
|
|
|
child_dev_ptr = dev_priv->vbt.child_dev + count;
|
|
count++;
|
|
|
|
/*
|
|
* Copy as much as we know (sizeof) and is available
|
|
* (child_dev_size) of the child device. Accessing the data must
|
|
* depend on VBT version.
|
|
*/
|
|
memcpy(child_dev_ptr, p_child,
|
|
min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void
|
|
init_vbt_defaults(struct drm_i915_private *dev_priv)
|
|
{
|
|
enum port port;
|
|
|
|
dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
|
|
|
|
/* Default to having backlight */
|
|
dev_priv->vbt.backlight.present = true;
|
|
|
|
/* 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_priv,
|
|
!HAS_PCH_SPLIT(dev_priv));
|
|
DRM_DEBUG_KMS("Set default to SSC at %d kHz\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];
|
|
|
|
info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
|
|
|
|
info->supports_dvi = (port != PORT_A && port != PORT_E);
|
|
info->supports_hdmi = info->supports_dvi;
|
|
info->supports_dp = (port != PORT_E);
|
|
}
|
|
}
|
|
|
|
static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
|
|
{
|
|
const void *_vbt = vbt;
|
|
|
|
return _vbt + vbt->bdb_offset;
|
|
}
|
|
|
|
/**
|
|
* intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
|
|
* @buf: pointer to a buffer to validate
|
|
* @size: size of the buffer
|
|
*
|
|
* Returns true on valid VBT.
|
|
*/
|
|
bool intel_bios_is_valid_vbt(const void *buf, size_t size)
|
|
{
|
|
const struct vbt_header *vbt = buf;
|
|
const struct bdb_header *bdb;
|
|
|
|
if (!vbt)
|
|
return false;
|
|
|
|
if (sizeof(struct vbt_header) > size) {
|
|
DRM_DEBUG_DRIVER("VBT header incomplete\n");
|
|
return false;
|
|
}
|
|
|
|
if (memcmp(vbt->signature, "$VBT", 4)) {
|
|
DRM_DEBUG_DRIVER("VBT invalid signature\n");
|
|
return false;
|
|
}
|
|
|
|
if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
|
|
DRM_DEBUG_DRIVER("BDB header incomplete\n");
|
|
return false;
|
|
}
|
|
|
|
bdb = get_bdb_header(vbt);
|
|
if (vbt->bdb_offset + bdb->bdb_size > size) {
|
|
DRM_DEBUG_DRIVER("BDB incomplete\n");
|
|
return false;
|
|
}
|
|
|
|
return vbt;
|
|
}
|
|
|
|
static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
|
|
{
|
|
size_t i;
|
|
|
|
/* Scour memory looking for the VBT signature. */
|
|
for (i = 0; i + 4 < size; i++) {
|
|
void *vbt;
|
|
|
|
if (ioread32(bios + i) != *((const u32 *) "$VBT"))
|
|
continue;
|
|
|
|
/*
|
|
* This is the one place where we explicitly discard the address
|
|
* space (__iomem) of the BIOS/VBT.
|
|
*/
|
|
vbt = (void __force *) bios + i;
|
|
if (intel_bios_is_valid_vbt(vbt, size - i))
|
|
return vbt;
|
|
|
|
break;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* intel_bios_init - 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_bios_init(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct pci_dev *pdev = dev_priv->dev->pdev;
|
|
const struct vbt_header *vbt = dev_priv->opregion.vbt;
|
|
const struct bdb_header *bdb;
|
|
u8 __iomem *bios = NULL;
|
|
|
|
if (HAS_PCH_NOP(dev_priv))
|
|
return -ENODEV;
|
|
|
|
init_vbt_defaults(dev_priv);
|
|
|
|
if (!vbt) {
|
|
size_t size;
|
|
|
|
bios = pci_map_rom(pdev, &size);
|
|
if (!bios)
|
|
return -1;
|
|
|
|
vbt = find_vbt(bios, size);
|
|
if (!vbt) {
|
|
pci_unmap_rom(pdev, bios);
|
|
return -1;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
|
|
}
|
|
|
|
bdb = get_bdb_header(vbt);
|
|
|
|
DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
|
|
(int)sizeof(vbt->signature), vbt->signature, bdb->version);
|
|
|
|
/* Grab useful general definitions */
|
|
parse_general_features(dev_priv, bdb);
|
|
parse_general_definitions(dev_priv, bdb);
|
|
parse_lfp_panel_data(dev_priv, bdb);
|
|
parse_lfp_backlight(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_psr(dev_priv, bdb);
|
|
parse_mipi(dev_priv, bdb);
|
|
parse_ddi_ports(dev_priv, bdb);
|
|
|
|
if (bios)
|
|
pci_unmap_rom(pdev, bios);
|
|
|
|
return 0;
|
|
}
|