drm/i915/bios: interpret the i2c element

Add parsing of the i2c element, defined in MIPI sequence block v2. Drop
the status operation byte while at it, that does not exist.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/d8a2998977feee2f5b5ad609aaca787adfb41479.1450702954.git.jani.nikula@intel.com

drivers/gpu/drm/i915/intel_bios.c

@@ -812,6 +812,11 @@ static int goto_next_sequence(const u8 *data, int index, int total)
 		case MIPI_SEQ_ELEM_GPIO:
 			len = 2;
 			break;
+		case MIPI_SEQ_ELEM_I2C:
+			if (index + 7 > total)
+				return 0;
+			len = *(data + index + 6) + 7;
+			break;
 		default:
 			DRM_ERROR("Unknown operation byte\n");
 			return 0;

drivers/gpu/drm/i915/intel_bios.h

@@ -968,7 +968,7 @@ enum mipi_seq_element {
 	MIPI_SEQ_ELEM_SEND_PKT,
 	MIPI_SEQ_ELEM_DELAY,
 	MIPI_SEQ_ELEM_GPIO,
-	MIPI_SEQ_ELEM_STATUS,
+	MIPI_SEQ_ELEM_I2C,		/* sequence block v2+ */
 	MIPI_SEQ_ELEM_MAX
 };