drm/i915: Document a few more BDB_GENERAL_FEATURES bits from PCH BIOS

BugLink: http://bugs.launchpad.net/bugs/614238

This includes whether an eDP panel is present, and whether that should
use SSC (and at what frequency)

Signed-off-by: Keith Packard <keithp@keithp.com>

(cherry picked from commit d2830bdb84fac6e84e45ffe1a4c9bec762295d7d)
BugLink: http://bugs.launchpad.net/bugs/614238
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Herton Krzesinski <herton.krzesinski@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index 02b1b62415d..72fb500bf39 100644
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -135,7 +135,10 @@ struct bdb_general_features {
         /* bits 5 */
         u8 int_crt_support:1;
         u8 int_tv_support:1;
-        u8 rsvd11:6; /* finish byte */
+        u8 int_efp_support:1;
+        u8 dp_ssc_enb:1;        /* PCH attached eDP supports SSC */
+        u8 dp_ssc_freq:1;       /* SSC freq for PCH attached eDP */
+        u8 rsvd11:3; /* finish byte */
 } __attribute__((packed));
 
 /* pre-915 */