From: jsg <jsg@openbsd.org>
Date: Mon, 25 Sep 2023 03:06:20 +0000 (+0000)
Subject: drm/amd/display: Use DTBCLK as refclk instead of DPREFCLK
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=98787e2f690a6eb107deb239d37f8078efca577e;p=openbsd

drm/amd/display: Use DTBCLK as refclk instead of DPREFCLK

From Austin Zheng
506d2ee72af2ffc4173537eb001d7d4d57781ec7 in linux-6.1.y/6.1.55
4a30cc2bd281fa176a68b5305cd3695d636152ad in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_dccg.c b/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_dccg.c
index ffbb739d85b..8496ff4a25e 100644
--- a/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_dccg.c
+++ b/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_dccg.c
@@ -290,7 +290,8 @@ static void dccg32_set_dpstreamclk(
 	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
 
 	/* set the dtbclk_p source */
-	dccg32_set_dtbclk_p_src(dccg, src, otg_inst);
+	/* always program refclk as DTBCLK. No use-case expected to require DPREFCLK as refclk */
+	dccg32_set_dtbclk_p_src(dccg, DTBCLK0, otg_inst);
 
 	/* enabled to select one of the DTBCLKs for pipe */
 	switch (dp_hpo_inst) {