* Eric Anholt <eric@anholt.net>
*
*/
-#include <linux/dmi.h>
+
#include <drm/drm_dp_helper.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
drm_mode_debug_printmodeline(panel_fixed_mode);
}
-static int intel_bios_ssc_frequency(struct drm_device *dev,
+static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
bool alternate)
{
- switch (INTEL_INFO(dev)->gen) {
+ switch (INTEL_INFO(dev_priv)->gen) {
case 2:
return alternate ? 66667 : 48000;
case 3:
parse_general_features(struct drm_i915_private *dev_priv,
const struct bdb_header *bdb)
{
- struct drm_device *dev = dev_priv->dev;
const struct bdb_general_features *general;
general = find_section(bdb, BDB_GENERAL_FEATURES);
- if (general) {
- dev_priv->vbt.int_tv_support = general->int_tv_support;
+ if (!general)
+ return;
+
+ dev_priv->vbt.int_tv_support = general->int_tv_support;
+ /* int_crt_support can't be trusted on earlier platforms */
+ if (bdb->version >= 155 &&
+ (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
dev_priv->vbt.int_crt_support = general->int_crt_support;
- dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
- dev_priv->vbt.lvds_ssc_freq =
- intel_bios_ssc_frequency(dev, general->ssc_freq);
- dev_priv->vbt.display_clock_mode = general->display_clock_mode;
- dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
- 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",
- dev_priv->vbt.int_tv_support,
- dev_priv->vbt.int_crt_support,
- dev_priv->vbt.lvds_use_ssc,
- dev_priv->vbt.lvds_ssc_freq,
- dev_priv->vbt.display_clock_mode,
- dev_priv->vbt.fdi_rx_polarity_inverted);
- }
+ dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
+ dev_priv->vbt.lvds_ssc_freq =
+ intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
+ dev_priv->vbt.display_clock_mode = general->display_clock_mode;
+ dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
+ 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",
+ dev_priv->vbt.int_tv_support,
+ dev_priv->vbt.int_crt_support,
+ dev_priv->vbt.lvds_use_ssc,
+ dev_priv->vbt.lvds_ssc_freq,
+ dev_priv->vbt.display_clock_mode,
+ dev_priv->vbt.fdi_rx_polarity_inverted);
}
static void
static void parse_ddi_ports(struct drm_i915_private *dev_priv,
const struct bdb_header *bdb)
{
- struct drm_device *dev = dev_priv->dev;
enum port port;
- if (!HAS_DDI(dev))
+ if (!HAS_DDI(dev_priv))
return;
if (!dev_priv->vbt.child_dev_num)
static void
init_vbt_defaults(struct drm_i915_private *dev_priv)
{
- struct drm_device *dev = dev_priv->dev;
enum port port;
dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
* Core/SandyBridge/IvyBridge use alternative (120MHz) reference
* clock for LVDS.
*/
- dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
- !HAS_PCH_SPLIT(dev));
+ 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++) {
}
}
-static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
+static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
{
- DRM_DEBUG_KMS("Falling back to manually reading VBT from "
- "VBIOS ROM for %s\n",
- id->ident);
- return 1;
+ const void *_vbt = vbt;
+
+ return _vbt + vbt->bdb_offset;
}
-static const struct dmi_system_id intel_no_opregion_vbt[] = {
- {
- .callback = intel_no_opregion_vbt_callback,
- .ident = "ThinkCentre A57",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
- },
- },
- { }
-};
-
-static const struct bdb_header *validate_vbt(const void *base,
- size_t size,
- const void *_vbt,
- const char *source)
+/**
+ * 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)
{
- size_t offset = _vbt - base;
- const struct vbt_header *vbt = _vbt;
+ const struct vbt_header *vbt = buf;
const struct bdb_header *bdb;
- if (offset + sizeof(struct vbt_header) > size) {
+ if (!vbt)
+ return false;
+
+ if (sizeof(struct vbt_header) > size) {
DRM_DEBUG_DRIVER("VBT header incomplete\n");
- return NULL;
+ return false;
}
if (memcmp(vbt->signature, "$VBT", 4)) {
DRM_DEBUG_DRIVER("VBT invalid signature\n");
- return NULL;
+ return false;
}
- offset += vbt->bdb_offset;
- if (offset + sizeof(struct bdb_header) > size) {
+ if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
DRM_DEBUG_DRIVER("BDB header incomplete\n");
- return NULL;
+ return false;
}
- bdb = base + offset;
- if (offset + bdb->bdb_size > size) {
+ bdb = get_bdb_header(vbt);
+ if (vbt->bdb_offset + bdb->bdb_size > size) {
DRM_DEBUG_DRIVER("BDB incomplete\n");
- return NULL;
+ return false;
}
- DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
- source, vbt->signature);
- return bdb;
+ return vbt;
}
-static const struct bdb_header *find_vbt(void __iomem *bios, size_t size)
+static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
{
- const struct bdb_header *bdb = NULL;
size_t i;
/* Scour memory looking for the VBT signature. */
for (i = 0; i + 4 < size; i++) {
- if (ioread32(bios + i) == *((const u32 *) "$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;
+ void *vbt;
- bdb = validate_vbt(_bios, size, _bios + i, "PCI ROM");
- break;
- }
+ 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 bdb;
+ return NULL;
}
/**
- * intel_parse_bios - find VBT and initialize settings from the BIOS
+ * 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
* Returns 0 on success, nonzero on failure.
*/
int
-intel_parse_bios(struct drm_device *dev)
+intel_bios_init(struct drm_i915_private *dev_priv)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct pci_dev *pdev = dev->pdev;
- const struct bdb_header *bdb = NULL;
+ 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))
+ if (HAS_PCH_NOP(dev_priv))
return -ENODEV;
init_vbt_defaults(dev_priv);
- /* XXX Should this validation be moved to intel_opregion.c? */
- if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt)
- bdb = validate_vbt(dev_priv->opregion.header, OPREGION_SIZE,
- dev_priv->opregion.vbt, "OpRegion");
-
- if (bdb == NULL) {
+ if (!vbt) {
size_t size;
bios = pci_map_rom(pdev, &size);
if (!bios)
return -1;
- bdb = find_vbt(bios, size);
- if (!bdb) {
+ 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);
projects / linux-2.6-block.git / blobdiff