Commit a1a0e61f authored by Alvin Lee's avatar Alvin Lee Committed by Alex Deucher
Browse files

drm/amd/display: Revert to old formula in set_vtg_params 



[Why]
New formula + cursor change causing underflow
on certain configs

[How]
Rever to old formula

Signed-off-by: default avatarAlvin Lee <alvin.lee2@amd.com>
Reviewed-by: default avatarYongqiang Sun <yongqiang.sun@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent cdde482c

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c

+4 −2
Original line number Diff line number Diff line
@@ -299,6 +299,7 @@ void optc1_set_vtg_params(struct timing_generator *optc, 
	uint32_t asic_blank_end;

	uint32_t v_init;

	uint32_t v_fp2 = 0;

	int32_t vertical_line_start;



	struct optc *optc1 = DCN10TG_FROM_TG(optc);
@@ -315,8 +316,9 @@ void optc1_set_vtg_params(struct timing_generator *optc, 
			patched_crtc_timing.v_border_top;



	/* if VSTARTUP is before VSYNC, FP2 is the offset, otherwise 0 */

	if (optc1->vstartup_start > asic_blank_end)

		v_fp2 = optc1->vstartup_start - asic_blank_end;

	vertical_line_start = asic_blank_end - optc1->vstartup_start + 1;

	if (vertical_line_start < 0)

		v_fp2 = -vertical_line_start;



	/* Interlace */

	if (REG(OTG_INTERLACE_CONTROL)) {

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