From 35b74eccf8289e4a458133be9f9795d152b6f11e Mon Sep 17 00:00:00 2001 From: Jingwen Zhu Date: Thu, 8 May 2025 11:19:49 +0800 Subject: [PATCH] drm/amd/display: Add disconnect case on dongle check [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 Signed-off-by: Jingwen Zhu Signed-off-by: Wayne Lin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- 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 29606fda029d6..e2235fd32998c 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: -- 2.47.2