[PATCH 01/12] drm/amd/display: Fix timing bandwidth calculation for HDMI

[Roman.Li at amd.com]

From: "Leo (Hanghong) Ma" <hanghong.ma at amd.com>

[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 <chris.park at amd.com>
Acked-by: Roman Li <roman.li at amd.com>
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma at amd.com>
---
 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 811474f4419b..fb4db3158e8f 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 0df6c55eb326..ac41f9c0a283 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;
 }
 
-- 
2.34.1