From: Charlene Liu <charlene.liu@amd.com>
Date: Wed, 12 Sep 2018 22:22:16 +0000 (-0400)
Subject: drm/amd/display: fix 4K stereo screen flash issue
X-Git-Tag: v4.20-rc1~81^2~3^2~68
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=39c03e0032ff839e62aae7d85a541451444a3198;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: fix 4K stereo screen flash issue

[Why]
HDMI_scramber is not enabled for pixel rate >340Mhz.
[How]
Calculate the phy clock to include the Hw frame packing factor.

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Chris Park <Chris.Park@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 2d6a4300bfa40..a3fee3769f4dd 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1975,6 +1975,9 @@ static void calculate_phy_pix_clks(struct dc_stream_state *stream)
 	else
 		stream->phy_pix_clk =
 			stream->timing.pix_clk_khz;
+
+	if (stream->timing.timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)
+		stream->phy_pix_clk *= 2;
 }
 
 enum dc_status resource_map_pool_resources(