From 02a30f831b4ecf46609891b1832209c855d59e3a Mon Sep 17 00:00:00 2001 From: jsg Date: Fri, 20 Mar 2026 00:15:43 +0000 Subject: [PATCH] drm/amd/display: Fallback to boot snapshot for dispclk From Dillon Varone 1a34999922ba6c95df6e3ba5c82624f61323f82b in linux-6.18.y/6.18.19 30d937f63bd19bbcaafa4b892eb251f8bbbf04ef in mainline linux --- sys/dev/pci/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/dev/pci/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c b/sys/dev/pci/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c index bc980d52d0b..ae505f1e919 100644 --- a/sys/dev/pci/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c +++ b/sys/dev/pci/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c @@ -68,7 +68,11 @@ void dcn401_initialize_min_clocks(struct dc *dc) * audio corruption. Read current DISPCLK from DENTIST and request the same * freq to ensure that the timing is valid and unchanged. */ - clocks->dispclk_khz = dc->clk_mgr->funcs->get_dispclk_from_dentist(dc->clk_mgr); + if (dc->clk_mgr->funcs->get_dispclk_from_dentist) { + clocks->dispclk_khz = dc->clk_mgr->funcs->get_dispclk_from_dentist(dc->clk_mgr); + } else { + clocks->dispclk_khz = dc->clk_mgr->boot_snapshot.dispclk * 1000; + } } clocks->ref_dtbclk_khz = dc->clk_mgr->bw_params->clk_table.entries[0].dtbclk_mhz * 1000; clocks->fclk_p_state_change_support = true;