drm/i915/tgl: add support to one DP-MST stream
This is the minimum change to support 1 (and only 1) DP-MST monitor
connected on Tiger Lake. This change was isolated from previous patch
from José. In order to support more streams we will need to create a
master-slave relation on the transcoders and that is not currently
working yet.
v2: remove unused macro and use REG_FIELD_PREP() (Ville)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191029035049.5907-1-lucas.demarchi@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5894e46..55de905 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9657,6 +9657,9 @@ enum skl_power_gate {
#define TRANS_DDI_EDP_INPUT_A_ONOFF (4 << 12)
#define TRANS_DDI_EDP_INPUT_B_ONOFF (5 << 12)
#define TRANS_DDI_EDP_INPUT_C_ONOFF (6 << 12)
+#define TRANS_DDI_MST_TRANSPORT_SELECT_MASK REG_GENMASK(12, 10)
+#define TRANS_DDI_MST_TRANSPORT_SELECT(trans) \
+ REG_FIELD_PREP(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, trans)
#define TRANS_DDI_HDCP_SIGNALLING (1 << 9)
#define TRANS_DDI_DP_VC_PAYLOAD_ALLOC (1 << 8)
#define TRANS_DDI_HDMI_SCRAMBLER_CTS_ENABLE (1 << 7)
