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Regard whitespace Rev 6083 → Rev 6084

/drivers/video/drm/i915/intel_bios.c
36,12 → 36,13
 
static int panel_type;
 
static void *
find_section(struct bdb_header *bdb, int section_id)
static const void *
find_section(const void *_bdb, int section_id)
{
u8 *base = (u8 *)bdb;
const struct bdb_header *bdb = _bdb;
const u8 *base = _bdb;
int index = 0;
u16 total, current_size;
u32 total, current_size;
u8 current_id;
 
/* skip to first section */
53,9 → 54,13
current_id = *(base + index);
index++;
 
current_size = *((u16 *)(base + index));
current_size = *((const u16 *)(base + index));
index += 2;
 
/* The MIPI Sequence Block v3+ has a separate size field. */
if (current_id == BDB_MIPI_SEQUENCE && *(base + index) >= 3)
current_size = *((const u32 *)(base + index + 1));
 
if (index + current_size > total)
return NULL;
 
69,7 → 74,7
}
 
static u16
get_blocksize(void *p)
get_blocksize(const void *p)
{
u16 *block_ptr, block_size;
 
121,42 → 126,6
drm_mode_set_name(panel_fixed_mode);
}
 
static bool
lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
const struct lvds_dvo_timing *b)
{
if (a->hactive_hi != b->hactive_hi ||
a->hactive_lo != b->hactive_lo)
return false;
 
if (a->hsync_off_hi != b->hsync_off_hi ||
a->hsync_off_lo != b->hsync_off_lo)
return false;
 
if (a->hsync_pulse_width != b->hsync_pulse_width)
return false;
 
if (a->hblank_hi != b->hblank_hi ||
a->hblank_lo != b->hblank_lo)
return false;
 
if (a->vactive_hi != b->vactive_hi ||
a->vactive_lo != b->vactive_lo)
return false;
 
if (a->vsync_off != b->vsync_off)
return false;
 
if (a->vsync_pulse_width != b->vsync_pulse_width)
return false;
 
if (a->vblank_hi != b->vblank_hi ||
a->vblank_lo != b->vblank_lo)
return false;
 
return true;
}
 
static const struct lvds_dvo_timing *
get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
204,7 → 173,7
/* Try to find integrated panel data */
static void
parse_lfp_panel_data(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
const struct bdb_lvds_options *lvds_options;
const struct bdb_lvds_lfp_data *lvds_lfp_data;
212,7 → 181,7
const struct lvds_dvo_timing *panel_dvo_timing;
const struct lvds_fp_timing *fp_timing;
struct drm_display_mode *panel_fixed_mode;
int i, downclock, drrs_mode;
int drrs_mode;
 
lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
if (!lvds_options)
271,30 → 240,6
DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
drm_mode_debug_printmodeline(panel_fixed_mode);
 
/*
* Iterate over the LVDS panel timing info to find the lowest clock
* for the native resolution.
*/
downclock = panel_dvo_timing->clock;
for (i = 0; i < 16; i++) {
const struct lvds_dvo_timing *dvo_timing;
 
dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
lvds_lfp_data_ptrs,
i);
if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
dvo_timing->clock < downclock)
downclock = dvo_timing->clock;
}
 
if (downclock < panel_dvo_timing->clock && i915.lvds_downclock) {
dev_priv->lvds_downclock_avail = 1;
dev_priv->lvds_downclock = downclock * 10;
DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
"Normal Clock %dKHz, downclock %dKHz\n",
panel_fixed_mode->clock, 10*downclock);
}
 
fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
lvds_lfp_data_ptrs,
lvds_options->panel_type);
310,7 → 255,8
}
 
static void
parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
parse_lfp_backlight(struct drm_i915_private *dev_priv,
const struct bdb_header *bdb)
{
const struct bdb_lfp_backlight_data *backlight_data;
const struct bdb_lfp_backlight_data_entry *entry;
348,9 → 294,9
/* Try to find sdvo panel data */
static void
parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct lvds_dvo_timing *dvo_timing;
const struct lvds_dvo_timing *dvo_timing;
struct drm_display_mode *panel_fixed_mode;
int index;
 
361,7 → 307,7
}
 
if (index == -1) {
struct bdb_sdvo_lvds_options *sdvo_lvds_options;
const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
 
sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
if (!sdvo_lvds_options)
402,10 → 348,10
 
static void
parse_general_features(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct drm_device *dev = dev_priv->dev;
struct bdb_general_features *general;
const struct bdb_general_features *general;
 
general = find_section(bdb, BDB_GENERAL_FEATURES);
if (general) {
428,9 → 374,9
 
static void
parse_general_definitions(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct bdb_general_definitions *general;
const struct bdb_general_definitions *general;
 
general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
if (general) {
438,7 → 384,7
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 (intel_gmbus_is_port_valid(bus_pin))
if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
dev_priv->vbt.crt_ddc_pin = bus_pin;
} else {
DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
447,13 → 393,19
}
}
 
static const union child_device_config *
child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
{
return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
}
 
static void
parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct sdvo_device_mapping *p_mapping;
struct bdb_general_definitions *p_defs;
union child_device_config *p_child;
const struct bdb_general_definitions *p_defs;
const struct old_child_dev_config *child; /* legacy */
int i, child_device_num, count;
u16 block_size;
 
462,14 → 414,14
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
 
/*
* Only parse SDVO mappings when the general definitions block child
* device size matches that of the *legacy* child device config
* struct. Thus, SDVO mapping will be skipped for newer VBT.
*/
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");
if (p_defs->child_dev_size != sizeof(*child)) {
DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
return;
}
/* get the block size of general definitions */
476,16 → 428,16
block_size = get_blocksize(p_defs);
/* get the number of child device */
child_device_num = (block_size - sizeof(*p_defs)) /
sizeof(*p_child);
p_defs->child_dev_size;
count = 0;
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[i]);
if (!p_child->old.device_type) {
child = &child_device_ptr(p_defs, i)->old;
if (!child->device_type) {
/* skip the device block if device type is invalid */
continue;
}
if (p_child->old.slave_addr != SLAVE_ADDR1 &&
p_child->old.slave_addr != SLAVE_ADDR2) {
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.
492,8 → 444,8
*/
continue;
}
if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
p_child->old.dvo_port != DEVICE_PORT_DVOC) {
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;
500,16 → 452,16
}
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) ?
child->slave_addr,
(child->dvo_port == DEVICE_PORT_DVOB) ?
"SDVOB" : "SDVOC");
p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
p_mapping = &(dev_priv->sdvo_mappings[child->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->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,
521,7 → 473,7
DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
"two SDVO device.\n");
}
if (p_child->old.slave2_addr) {
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"
539,9 → 491,9
 
static void
parse_driver_features(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct bdb_driver_features *driver;
const struct bdb_driver_features *driver;
 
driver = find_section(bdb, BDB_DRIVER_FEATURES);
if (!driver)
565,11 → 517,11
}
 
static void
parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
{
struct bdb_edp *edp;
struct edp_power_seq *edp_pps;
struct edp_link_params *edp_link_params;
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) {
662,8 → 614,64
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;
732,13 → 740,14
}
 
static void
parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
parse_mipi(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
{
struct bdb_mipi_config *start;
struct bdb_mipi_sequence *sequence;
struct mipi_config *config;
struct mipi_pps_data *pps;
u8 *data, *seq_data;
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;
 
794,6 → 803,12
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);
881,8 → 896,19
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,
struct bdb_header *bdb)
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];
889,16 → 915,16
uint8_t hdmi_level_shift;
int i, j;
bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
uint8_t aux_channel;
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[][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 */ },
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. */
905,7 → 931,7
for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
it = dev_priv->vbt.child_dev + i;
 
for (j = 0; j < 2; j++) {
for (j = 0; j < 3; j++) {
if (dvo_ports[port][j] == -1)
break;
 
923,6 → 949,7
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;
954,22 → 981,53
DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
 
if (is_dvi) {
if (child->common.ddc_pin == 0x05 && port != PORT_B)
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");
if (child->common.ddc_pin == 0x04 && port != PORT_C)
else if (ddc_pin == DDC_PIN_C && port != PORT_C)
DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
if (child->common.ddc_pin == 0x06 && port != PORT_D)
else if (ddc_pin == DDC_PIN_D && port != PORT_D)
DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
}
 
if (is_dp) {
if (aux_channel == 0x40 && port != PORT_A)
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");
if (aux_channel == 0x10 && port != PORT_B)
else if (aux_channel == DP_AUX_B && port != PORT_B)
DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
if (aux_channel == 0x20 && port != PORT_C)
else if (aux_channel == DP_AUX_C && port != PORT_C)
DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
if (aux_channel == 0x30 && port != PORT_D)
else if (aux_channel == DP_AUX_D && port != PORT_D)
DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
}
 
981,10 → 1039,20
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,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct drm_device *dev = dev_priv->dev;
enum port port;
1004,11 → 1072,13
 
static void
parse_device_mapping(struct drm_i915_private *dev_priv,
struct bdb_header *bdb)
const struct bdb_header *bdb)
{
struct bdb_general_definitions *p_defs;
union child_device_config *p_child, *child_dev_ptr;
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);
1016,25 → 1086,40
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");
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)) /
sizeof(*p_child);
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 = &(p_defs->devices[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;
1054,7 → 1139,7
dev_priv->vbt.child_dev_num = count;
count = 0;
for (i = 0; i < child_device_num; i++) {
p_child = &(p_defs->devices[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;
1070,8 → 1155,14
 
child_dev_ptr = dev_priv->vbt.child_dev + count;
count++;
memcpy((void *)child_dev_ptr, (void *)p_child,
sizeof(*p_child));
 
/*
* 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;
}
1082,7 → 1173,7
struct drm_device *dev = dev_priv->dev;
enum port port;
 
dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
 
/* Default to having backlight */
dev_priv->vbt.backlight.present = true;
1140,19 → 1231,15
{ }
};
 
static struct bdb_header *validate_vbt(char *base, size_t size,
struct vbt_header *vbt,
static const struct bdb_header *validate_vbt(const void *base,
size_t size,
const void *_vbt,
const char *source)
{
size_t offset;
struct bdb_header *bdb;
size_t offset = _vbt - base;
const struct vbt_header *vbt = _vbt;
const struct bdb_header *bdb;
 
if (vbt == NULL) {
DRM_DEBUG_DRIVER("VBT signature missing\n");
return NULL;
}
 
offset = (char *)vbt - base;
if (offset + sizeof(struct vbt_header) > size) {
DRM_DEBUG_DRIVER("VBT header incomplete\n");
return NULL;
1169,7 → 1256,7
return NULL;
}
 
bdb = (struct bdb_header *)(base + offset);
bdb = base + offset;
if (offset + bdb->bdb_size > size) {
DRM_DEBUG_DRIVER("BDB incomplete\n");
return NULL;
1180,6 → 1267,30
return bdb;
}
 
static const struct bdb_header *find_vbt(void __iomem *bios, size_t size)
{
const struct bdb_header *bdb = NULL;
size_t i;
 
/* Scour memory looking for the VBT signature. */
for (i = 0; i + 4 < size; i++) {
if (ioread32(bios + i) == *((const u32 *) "$VBT")) {
/*
* This is the one place where we explicitly discard the
* address space (__iomem) of the BIOS/VBT. From now on
* everything is based on 'base', and treated as regular
* memory.
*/
void *_bios = (void __force *) bios;
 
bdb = validate_vbt(_bios, size, _bios + i, "PCI ROM");
break;
}
}
 
return bdb;
}
 
/**
* intel_parse_bios - find VBT and initialize settings from the BIOS
* @dev: DRM device
1194,7 → 1305,7
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct pci_dev *pdev = dev->pdev;
struct bdb_header *bdb = NULL;
const struct bdb_header *bdb = NULL;
u8 __iomem *bios = NULL;
 
if (HAS_PCH_NOP(dev))
1204,27 → 1315,17
 
/* XXX Should this validation be moved to intel_opregion.c? */
if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt)
bdb = validate_vbt((char *)dev_priv->opregion.header, OPREGION_SIZE,
(struct vbt_header *)dev_priv->opregion.vbt,
"OpRegion");
bdb = validate_vbt(dev_priv->opregion.header, OPREGION_SIZE,
dev_priv->opregion.vbt, "OpRegion");
 
if (bdb == NULL) {
size_t i, size;
size_t size;
 
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) == 0) {
bdb = validate_vbt(bios, size,
(struct vbt_header *)(bios + i),
"PCI ROM");
break;
}
}
 
bdb = find_vbt(bios, size);
if (!bdb) {
pci_unmap_rom(pdev, bios);
return -1;
1241,6 → 1342,7
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);
 
1249,21 → 1351,3
 
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);
}
}