[PATCH 11/24] drm/amd/display: Add disconnect case on dongle check

[Wayne Lin <Wayne.Lin@amd.com>]

From: Jingwen Zhu <Jingwen.Zhu@amd.com>

[why]
In the case of an external monitor disconnection,
the kernel mode will attempt to post new timing
validation with two path counts (eDP + external
monitor removed to virtual).

[how]
Skip validating color depth and pixel encoding in the
scenario involving a DP to HDMI active converter dongle.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Jingwen Zhu <Jingwen.Zhu@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
---
 drivers/gpu/drm/amd/display/dc/link/link_validation.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/link/link_validation.c b/drivers/gpu/drm/amd/display/dc/link/link_validation.c
index 29606fda029d..e2235fd32998 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_validation.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_validation.c
@@ -86,6 +86,10 @@ static bool dp_active_dongle_validate_timing(
 			if (!dongle_caps->is_dp_hdmi_ycbcr420_pass_through)
 				return false;
 			break;
+		case PIXEL_ENCODING_UNDEFINED:
+			/* These color depths are currently not supported */
+			ASSERT(false);
+			break;
 		default:
 			/* Invalid Pixel Encoding*/
 			return false;
@@ -104,6 +108,10 @@ static bool dp_active_dongle_validate_timing(
 			if (dongle_caps->dp_hdmi_max_bpc < 12)
 				return false;
 			break;
+		case COLOR_DEPTH_UNDEFINED:
+			/* These color depths are currently not supported */
+			ASSERT(false);
+			break;
 		case COLOR_DEPTH_141414:
 		case COLOR_DEPTH_161616:
 		default:
-- 
2.43.0