linux/drivers/gpu/drm/i915/intel_bios.c
Jesse Barnes 9f0e7ff4b3 drm/i915: fetch eDP configuration data from the VBT
We need to use some of these values in eDP configurations, so be sure to
fetch them and store them in the i915 private structure.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-10-08 10:28:21 +01:00

650 lines
18 KiB
C

/*
* Copyright © 2006 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <drm/drm_dp_helper.h>
#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "intel_bios.h"
#define SLAVE_ADDR1 0x70
#define SLAVE_ADDR2 0x72
static int panel_type;
static void *
find_section(struct bdb_header *bdb, int section_id)
{
u8 *base = (u8 *)bdb;
int index = 0;
u16 total, current_size;
u8 current_id;
/* skip to first section */
index += bdb->header_size;
total = bdb->bdb_size;
/* walk the sections looking for section_id */
while (index < total) {
current_id = *(base + index);
index++;
current_size = *((u16 *)(base + index));
index += 2;
if (current_id == section_id)
return base + index;
index += current_size;
}
return NULL;
}
static u16
get_blocksize(void *p)
{
u16 *block_ptr, block_size;
block_ptr = (u16 *)((char *)p - 2);
block_size = *block_ptr;
return block_size;
}
static void
fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
struct lvds_dvo_timing *dvo_timing)
{
panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
dvo_timing->hactive_lo;
panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
dvo_timing->hsync_pulse_width;
panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
dvo_timing->vactive_lo;
panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
dvo_timing->vsync_off;
panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
dvo_timing->vsync_pulse_width;
panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
panel_fixed_mode->clock = dvo_timing->clock * 10;
panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
if (dvo_timing->hsync_positive)
panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
else
panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
if (dvo_timing->vsync_positive)
panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
else
panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
/* Some VBTs have bogus h/vtotal values */
if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
drm_mode_set_name(panel_fixed_mode);
}
/* Try to find integrated panel data */
static void
parse_lfp_panel_data(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct bdb_lvds_options *lvds_options;
struct bdb_lvds_lfp_data *lvds_lfp_data;
struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
struct bdb_lvds_lfp_data_entry *entry;
struct lvds_dvo_timing *dvo_timing;
struct drm_display_mode *panel_fixed_mode;
int lfp_data_size, dvo_timing_offset;
int i, temp_downclock;
struct drm_display_mode *temp_mode;
lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
if (!lvds_options)
return;
dev_priv->lvds_dither = lvds_options->pixel_dither;
if (lvds_options->panel_type == 0xff)
return;
panel_type = lvds_options->panel_type;
lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
if (!lvds_lfp_data)
return;
lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
if (!lvds_lfp_data_ptrs)
return;
dev_priv->lvds_vbt = 1;
lfp_data_size = lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
entry = (struct bdb_lvds_lfp_data_entry *)
((uint8_t *)lvds_lfp_data->data + (lfp_data_size *
lvds_options->panel_type));
dvo_timing_offset = lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
/*
* the size of fp_timing varies on the different platform.
* So calculate the DVO timing relative offset in LVDS data
* entry to get the DVO timing entry
*/
dvo_timing = (struct lvds_dvo_timing *)
((unsigned char *)entry + dvo_timing_offset);
panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
if (!panel_fixed_mode)
return;
fill_detail_timing_data(panel_fixed_mode, dvo_timing);
dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
drm_mode_debug_printmodeline(panel_fixed_mode);
temp_mode = kzalloc(sizeof(*temp_mode), GFP_KERNEL);
temp_downclock = panel_fixed_mode->clock;
/*
* enumerate the LVDS panel timing info entry in VBT to check whether
* the LVDS downclock is found.
*/
for (i = 0; i < 16; i++) {
entry = (struct bdb_lvds_lfp_data_entry *)
((uint8_t *)lvds_lfp_data->data + (lfp_data_size * i));
dvo_timing = (struct lvds_dvo_timing *)
((unsigned char *)entry + dvo_timing_offset);
fill_detail_timing_data(temp_mode, dvo_timing);
if (temp_mode->hdisplay == panel_fixed_mode->hdisplay &&
temp_mode->hsync_start == panel_fixed_mode->hsync_start &&
temp_mode->hsync_end == panel_fixed_mode->hsync_end &&
temp_mode->htotal == panel_fixed_mode->htotal &&
temp_mode->vdisplay == panel_fixed_mode->vdisplay &&
temp_mode->vsync_start == panel_fixed_mode->vsync_start &&
temp_mode->vsync_end == panel_fixed_mode->vsync_end &&
temp_mode->vtotal == panel_fixed_mode->vtotal &&
temp_mode->clock < temp_downclock) {
/*
* downclock is already found. But we expect
* to find the lower downclock.
*/
temp_downclock = temp_mode->clock;
}
/* clear it to zero */
memset(temp_mode, 0, sizeof(*temp_mode));
}
kfree(temp_mode);
if (temp_downclock < panel_fixed_mode->clock &&
i915_lvds_downclock) {
dev_priv->lvds_downclock_avail = 1;
dev_priv->lvds_downclock = temp_downclock;
DRM_DEBUG_KMS("LVDS downclock is found in VBT. ",
"Normal Clock %dKHz, downclock %dKHz\n",
temp_downclock, panel_fixed_mode->clock);
}
return;
}
/* Try to find sdvo panel data */
static void
parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct bdb_sdvo_lvds_options *sdvo_lvds_options;
struct lvds_dvo_timing *dvo_timing;
struct drm_display_mode *panel_fixed_mode;
sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
if (!sdvo_lvds_options)
return;
dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
if (!dvo_timing)
return;
panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
if (!panel_fixed_mode)
return;
fill_detail_timing_data(panel_fixed_mode,
dvo_timing + sdvo_lvds_options->panel_type);
dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
return;
}
static void
parse_general_features(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct drm_device *dev = dev_priv->dev;
struct bdb_general_features *general;
general = find_section(bdb, BDB_GENERAL_FEATURES);
if (general) {
dev_priv->int_tv_support = general->int_tv_support;
dev_priv->int_crt_support = general->int_crt_support;
dev_priv->lvds_use_ssc = general->enable_ssc;
if (dev_priv->lvds_use_ssc) {
if (IS_I85X(dev_priv->dev))
dev_priv->lvds_ssc_freq =
general->ssc_freq ? 66 : 48;
else if (IS_IRONLAKE(dev_priv->dev) || IS_GEN6(dev))
dev_priv->lvds_ssc_freq =
general->ssc_freq ? 100 : 120;
else
dev_priv->lvds_ssc_freq =
general->ssc_freq ? 100 : 96;
}
}
}
static void
parse_general_definitions(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct bdb_general_definitions *general;
general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
if (general) {
u16 block_size = get_blocksize(general);
if (block_size >= sizeof(*general)) {
int bus_pin = general->crt_ddc_gmbus_pin;
DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
if (bus_pin >= 1 && bus_pin <= 6)
dev_priv->crt_ddc_pin = bus_pin;
} else {
DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
block_size);
}
}
}
static void
parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct sdvo_device_mapping *p_mapping;
struct bdb_general_definitions *p_defs;
struct child_device_config *p_child;
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, unable to construct sdvo mapping.\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;
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
if (!p_child->device_type) {
/* skip the device block if device type is invalid */
continue;
}
if (p_child->slave_addr != SLAVE_ADDR1 &&
p_child->slave_addr != SLAVE_ADDR2) {
/*
* If the slave address is neither 0x70 nor 0x72,
* it is not a SDVO device. Skip it.
*/
continue;
}
if (p_child->dvo_port != DEVICE_PORT_DVOB &&
p_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",
p_child->slave_addr,
(p_child->dvo_port == DEVICE_PORT_DVOB) ?
"SDVOB" : "SDVOC");
p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
if (!p_mapping->initialized) {
p_mapping->dvo_port = p_child->dvo_port;
p_mapping->slave_addr = p_child->slave_addr;
p_mapping->dvo_wiring = p_child->dvo_wiring;
p_mapping->ddc_pin = p_child->ddc_pin;
p_mapping->i2c_pin = p_child->i2c_pin;
p_mapping->i2c_speed = p_child->i2c_speed;
p_mapping->initialized = 1;
DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d, i2c_speed=%d\n",
p_mapping->dvo_port,
p_mapping->slave_addr,
p_mapping->dvo_wiring,
p_mapping->ddc_pin,
p_mapping->i2c_pin,
p_mapping->i2c_speed);
} else {
DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
"two SDVO device.\n");
}
if (p_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,
struct bdb_header *bdb)
{
struct drm_device *dev = dev_priv->dev;
struct bdb_driver_features *driver;
driver = find_section(bdb, BDB_DRIVER_FEATURES);
if (!driver)
return;
if (SUPPORTS_EDP(dev) &&
driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
dev_priv->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 (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) {
DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
"supported, assume %dbpp panel color "
"depth.\n",
dev_priv->edp.bpp);
}
return;
}
switch ((edp->color_depth >> (panel_type * 2)) & 3) {
case EDP_18BPP:
dev_priv->edp.bpp = 18;
break;
case EDP_24BPP:
dev_priv->edp.bpp = 24;
break;
case EDP_30BPP:
dev_priv->edp.bpp = 30;
break;
}
/* Get the eDP sequencing and link info */
edp_pps = &edp->power_seqs[panel_type];
edp_link_params = &edp->link_params[panel_type];
dev_priv->edp.pps = *edp_pps;
dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
DP_LINK_BW_1_62;
switch (edp_link_params->lanes) {
case 0:
dev_priv->edp.lanes = 1;
break;
case 1:
dev_priv->edp.lanes = 2;
break;
case 3:
default:
dev_priv->edp.lanes = 4;
break;
}
switch (edp_link_params->preemphasis) {
case 0:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
break;
case 1:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
break;
case 2:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
break;
case 3:
dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
break;
}
switch (edp_link_params->vswing) {
case 0:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
break;
case 1:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
break;
case 2:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
break;
case 3:
dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
break;
}
}
static void
parse_device_mapping(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
{
struct bdb_general_definitions *p_defs;
struct child_device_config *p_child, *child_dev_ptr;
int i, child_device_num, count;
u16 block_size;
p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
if (!p_defs) {
DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
return;
}
/* judge whether the size of child device meets the requirements.
* If the child device size obtained from general definition block
* is different with sizeof(struct child_device_config), skip the
* parsing of sdvo device info
*/
if (p_defs->child_dev_size != sizeof(*p_child)) {
/* different child dev size . Ignore it */
DRM_DEBUG_KMS("different child size is found. Invalid.\n");
return;
}
/* get the block size of general definitions */
block_size = get_blocksize(p_defs);
/* get the number of child device */
child_device_num = (block_size - sizeof(*p_defs)) /
sizeof(*p_child);
count = 0;
/* get the number of child device that is present */
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
if (!p_child->device_type) {
/* skip the device block if device type is invalid */
continue;
}
count++;
}
if (!count) {
DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
return;
}
dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL);
if (!dev_priv->child_dev) {
DRM_DEBUG_KMS("No memory space for child device\n");
return;
}
dev_priv->child_dev_num = count;
count = 0;
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
if (!p_child->device_type) {
/* skip the device block if device type is invalid */
continue;
}
child_dev_ptr = dev_priv->child_dev + count;
count++;
memcpy((void *)child_dev_ptr, (void *)p_child,
sizeof(*p_child));
}
return;
}
static void
init_vbt_defaults(struct drm_i915_private *dev_priv)
{
dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
/* LFP panel data */
dev_priv->lvds_dither = 1;
dev_priv->lvds_vbt = 0;
/* SDVO panel data */
dev_priv->sdvo_lvds_vbt_mode = NULL;
/* general features */
dev_priv->int_tv_support = 1;
dev_priv->int_crt_support = 1;
dev_priv->lvds_use_ssc = 0;
/* eDP data */
dev_priv->edp.bpp = 18;
}
/**
* intel_init_bios - initialize VBIOS settings & find VBT
* @dev: DRM device
*
* Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
* to appropriate values.
*
* Returns 0 on success, nonzero on failure.
*/
bool
intel_init_bios(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct pci_dev *pdev = dev->pdev;
struct bdb_header *bdb = NULL;
u8 __iomem *bios = NULL;
init_vbt_defaults(dev_priv);
/* XXX Should this validation be moved to intel_opregion.c? */
if (dev_priv->opregion.vbt) {
struct vbt_header *vbt = dev_priv->opregion.vbt;
if (memcmp(vbt->signature, "$VBT", 4) == 0) {
DRM_DEBUG_DRIVER("Using VBT from OpRegion: %20s\n",
vbt->signature);
bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
} else
dev_priv->opregion.vbt = NULL;
}
if (bdb == NULL) {
struct vbt_header *vbt = NULL;
size_t size;
int i;
bios = pci_map_rom(pdev, &size);
if (!bios)
return -1;
/* Scour memory looking for the VBT signature */
for (i = 0; i + 4 < size; i++) {
if (!memcmp(bios + i, "$VBT", 4)) {
vbt = (struct vbt_header *)(bios + i);
break;
}
}
if (!vbt) {
DRM_ERROR("VBT signature missing\n");
pci_unmap_rom(pdev, bios);
return -1;
}
bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
}
/* Grab useful general definitions */
parse_general_features(dev_priv, bdb);
parse_general_definitions(dev_priv, bdb);
parse_lfp_panel_data(dev_priv, bdb);
parse_sdvo_panel_data(dev_priv, bdb);
parse_sdvo_device_mapping(dev_priv, bdb);
parse_device_mapping(dev_priv, bdb);
parse_driver_features(dev_priv, bdb);
parse_edp(dev_priv, bdb);
if (bios)
pci_unmap_rom(pdev, bios);
return 0;
}