From c597479f27b6b96c61c70cb25b5e1a4f9ea4c7f7 Mon Sep 17 00:00:00 2001 From: "Leo (Hanghong) Ma" Date: Thu, 4 Jan 2024 13:29:32 -0500 Subject: [PATCH] drm/amd/display: Fix timing bandwidth calculation for HDMI [Why && How] The current bandwidth calculation for timing doesn't account for certain HDMI modes overhead which leads to DSC can't be enabled. Add support to calculate the actual bandwidth for these HDMI modes. Reviewed-by: Chris Park Acked-by: Roman Li Signed-off-by: Leo (Hanghong) Ma Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dc_hw_types.h | 1 + drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h index 811474f4419bd..fb4db3158e8fb 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h @@ -942,6 +942,7 @@ struct dc_crtc_timing { uint32_t hdmi_vic; uint32_t rid; uint32_t fr_index; + uint32_t frl_uncompressed_video_bandwidth_in_kbps; enum dc_timing_3d_format timing_3d_format; enum dc_color_depth display_color_depth; enum dc_pixel_encoding pixel_encoding; diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c index 0df6c55eb3260..ac41f9c0a2834 100644 --- a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c +++ b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c @@ -137,6 +137,11 @@ uint32_t dc_bandwidth_in_kbps_from_timing( if (link_encoding == DC_LINK_ENCODING_DP_128b_132b) kbps = apply_128b_132b_stream_overhead(timing, kbps); + if (link_encoding == DC_LINK_ENCODING_HDMI_FRL && + timing->vic == 0 && timing->hdmi_vic == 0 && + timing->frl_uncompressed_video_bandwidth_in_kbps != 0) + kbps = timing->frl_uncompressed_video_bandwidth_in_kbps; + return kbps; } -- 2.30.2