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

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>

diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index 02b1b62415df5759697d712c4135513707043207..72fb500bf39f562da5dbeb9a1dd42f73ef3b6127 100644 (file)
--- 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 */