From: George Shen <george.shen@amd.com>
Date: Mon, 9 Dec 2024 15:57:31 +0000 (-0500)
Subject: drm/amd/display: Add expanded HBlank field to dc_crtc_timing
X-Git-Tag: v6.14-rc1~174^2~2^2~74
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bce2dc009436c096641601385afcf085cfad4967;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: Add expanded HBlank field to dc_crtc_timing

[Why]
For DP HBlank expansion/reduction, the HBlank parameters of the original
EDID timing needs to be notified to the sink in order for the timing to
be reduced back to the original HBlank size.

[How]
Add parameter in dc_crtc_timing to track the increased HBlank.

Reviewed-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

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 c10567ec1c819..8a6e3dfa42305 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
@@ -975,6 +975,9 @@ struct dc_crtc_timing {
 	struct dc_crtc_timing_flags flags;
 	uint32_t dsc_fixed_bits_per_pixel_x16; /* DSC target bitrate in 1/16 of bpp (e.g. 128 -> 8bpp) */
 	struct dc_dsc_config dsc_cfg;
+
+	/* The number of pixels that HBlank has been expanded by from the original EDID timing. */
+	uint32_t expanded_hblank;
 };
 
 enum trigger_delay {