Merge branch 'drm-intel-next' of git://people.freedesktop.org/~danvet/drm-intel into...

[linux-2.6-block.git] / drivers / gpu / drm / i915 / intel_bios.c

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index b48fc2a8410cad2339ceaf6eb814e439ec49b1b9..353459362f6f68eeb08a2c263366274b53c114b6 100644 (file)
--- 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);
                }
        }
 }