Merge branches 'gpio/merge' and 'spi/merge' of git://git.secretlab.ca/git/linux-2.6

[pandora-kernel.git] / drivers / gpu / drm / drm_edid.c

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index adc9358..0929219 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -184,9 +184,9 @@ drm_edid_block_valid(u8 *raw_edid)
 
 bad:
        if (raw_edid) {
-               DRM_ERROR("Raw EDID:\n");
+               printk(KERN_ERR "Raw EDID:\n");
                print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
-               printk("\n");
+               printk(KERN_ERR "\n");
        }
        return 0;
 }
@@ -258,6 +258,17 @@ drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
        return ret == 2 ? 0 : -1;
 }
 
+static bool drm_edid_is_zero(u8 *in_edid, int length)
+{
+       int i;
+       u32 *raw_edid = (u32 *)in_edid;
+
+       for (i = 0; i < length / 4; i++)
+               if (*(raw_edid + i) != 0)
+                       return false;
+       return true;
+}
+
 static u8 *
 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
 {
@@ -273,6 +284,10 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
                        goto out;
                if (drm_edid_block_valid(block))
                        break;
+               if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
+                       connector->null_edid_counter++;
+                       goto carp;
+               }
        }
        if (i == 4)
                goto carp;
@@ -1412,6 +1427,64 @@ end:
 }
 EXPORT_SYMBOL(drm_detect_monitor_audio);
 
+/**
+ * drm_add_display_info - pull display info out if present
+ * @edid: EDID data
+ * @info: display info (attached to connector)
+ *
+ * Grab any available display info and stuff it into the drm_display_info
+ * structure that's part of the connector.  Useful for tracking bpp and
+ * color spaces.
+ */
+static void drm_add_display_info(struct edid *edid,
+                                struct drm_display_info *info)
+{
+       info->width_mm = edid->width_cm * 10;
+       info->height_mm = edid->height_cm * 10;
+
+       /* driver figures it out in this case */
+       info->bpc = 0;
+       info->color_formats = 0;
+
+       /* Only defined for 1.4 with digital displays */
+       if (edid->revision < 4)
+               return;
+
+       if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
+               return;
+
+       switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
+       case DRM_EDID_DIGITAL_DEPTH_6:
+               info->bpc = 6;
+               break;
+       case DRM_EDID_DIGITAL_DEPTH_8:
+               info->bpc = 8;
+               break;
+       case DRM_EDID_DIGITAL_DEPTH_10:
+               info->bpc = 10;
+               break;
+       case DRM_EDID_DIGITAL_DEPTH_12:
+               info->bpc = 12;
+               break;
+       case DRM_EDID_DIGITAL_DEPTH_14:
+               info->bpc = 14;
+               break;
+       case DRM_EDID_DIGITAL_DEPTH_16:
+               info->bpc = 16;
+               break;
+       case DRM_EDID_DIGITAL_DEPTH_UNDEF:
+       default:
+               info->bpc = 0;
+               break;
+       }
+
+       info->color_formats = DRM_COLOR_FORMAT_RGB444;
+       if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
+               info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
+       if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
+               info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
+}
+
 /**
  * drm_add_edid_modes - add modes from EDID data, if available
  * @connector: connector we're probing
@@ -1460,8 +1533,7 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
        if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
                edid_fixup_preferred(connector, quirks);
 
-       connector->display_info.width_mm = edid->width_cm * 10;
-       connector->display_info.height_mm = edid->height_cm * 10;
+       drm_add_display_info(edid, &connector->display_info);
 
        return num_modes;
 }