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path: root/drivers/gpu/drm/i915/intel_bios.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.c')
-rw-r--r--drivers/gpu/drm/i915/intel_bios.c45
1 files changed, 43 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index b48fc2a8410..353459362f6 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -174,6 +174,28 @@ get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
}
+/* get lvds_fp_timing entry
+ * this function may return NULL if the corresponding entry is invalid
+ */
+static const struct lvds_fp_timing *
+get_lvds_fp_timing(const struct bdb_header *bdb,
+ const struct bdb_lvds_lfp_data *data,
+ const struct bdb_lvds_lfp_data_ptrs *ptrs,
+ int index)
+{
+ size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
+ u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
+ size_t ofs;
+
+ if (index >= ARRAY_SIZE(ptrs->ptr))
+ return NULL;
+ ofs = ptrs->ptr[index].fp_timing_offset;
+ if (ofs < data_ofs ||
+ ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
+ return NULL;
+ return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
+}
+
/* Try to find integrated panel data */
static void
parse_lfp_panel_data(struct drm_i915_private *dev_priv,
@@ -183,6 +205,7 @@ parse_lfp_panel_data(struct drm_i915_private *dev_priv,
const struct bdb_lvds_lfp_data *lvds_lfp_data;
const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
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;
@@ -244,6 +267,19 @@ parse_lfp_panel_data(struct drm_i915_private *dev_priv,
"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);
+ if (fp_timing) {
+ /* check the resolution, just to be sure */
+ if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
+ fp_timing->y_res == panel_fixed_mode->vdisplay) {
+ dev_priv->bios_lvds_val = fp_timing->lvds_reg_val;
+ DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
+ dev_priv->bios_lvds_val);
+ }
+ }
}
/* Try to find sdvo panel data */
@@ -256,6 +292,11 @@ parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
int index;
index = i915_vbt_sdvo_panel_type;
+ if (index == -2) {
+ DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
+ return;
+ }
+
if (index == -1) {
struct bdb_sdvo_lvds_options *sdvo_lvds_options;
@@ -332,11 +373,11 @@ parse_general_definitions(struct drm_i915_private *dev_priv,
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)
+ if (intel_gmbus_is_port_valid(bus_pin))
dev_priv->crt_ddc_pin = bus_pin;
} else {
DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
- block_size);
+ block_size);
}
}
}