[PATCH 02/25] drm/amd/display: Add a function for checking tmds mode

[Rodrigo Siqueira]

From: Chris Park <chris.p...@amd.com>

[Why]
DVI is TMDS signal like HDMI but without audio.  Current signal check
does not correctly reflect DVI clock programming.

[How]
Define a new signal check for TMDS that includes DVI to HDMI TMDS
programming.

Reviewed-by: Dillon Varone <dillon.var...@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.sique...@amd.com>
Signed-off-by: Chris Park <chris.p...@amd.com>
---
 drivers/gpu/drm/amd/display/include/signal_types.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/include/signal_types.h 
b/drivers/gpu/drm/amd/display/include/signal_types.h
index 1b14b17a79c7..a10d6b988aab 100644
--- a/drivers/gpu/drm/amd/display/include/signal_types.h
+++ b/drivers/gpu/drm/amd/display/include/signal_types.h
@@ -118,6 +118,19 @@ static inline bool dc_is_dvi_signal(enum signal_type 
signal)
        }
 }
 
+static inline bool dc_is_tmds_signal(enum signal_type signal)
+{
+       switch (signal) {
+       case SIGNAL_TYPE_DVI_SINGLE_LINK:
+       case SIGNAL_TYPE_DVI_DUAL_LINK:
+       case SIGNAL_TYPE_HDMI_TYPE_A:
+               return true;
+       break;
+       default:
+               return false;
+       }
+}
+
 static inline bool dc_is_dvi_single_link_signal(enum signal_type signal)
 {
        return (signal == SIGNAL_TYPE_DVI_SINGLE_LINK);
-- 
2.43.0