[PATCH AUTOSEL 5.4 096/130] drm/amd/display: Revert DCN2.1 dram_clock_change_latency update

Sasha Levin sashal at kernel.org
Wed Dec 23 02:17:39 UTC 2020


From: Michael Strauss <michael.strauss at amd.com>

[ Upstream commit 3abad347c432b9f5904cfad40f417d5cff90300c ]

[Why]
New value breaks VSR on high refresh panels, reverting until a fix is developed

Signed-off-by: Michael Strauss <michael.strauss at amd.com>
Signed-off-by: Sung Lee <sung.lee at amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun at amd.com>
Acked-by: Eryk Brol <eryk.brol at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index a6d5beada6634..bb7add5ea2273 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -257,7 +257,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn2_1_soc = {
 	.num_banks = 8,
 	.num_chans = 4,
 	.vmm_page_size_bytes = 4096,
-	.dram_clock_change_latency_us = 11.72,
+	.dram_clock_change_latency_us = 23.84,
 	.return_bus_width_bytes = 64,
 	.dispclk_dppclk_vco_speed_mhz = 3600,
 	.xfc_bus_transport_time_us = 4,
-- 
2.27.0



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