Commit 7b59cc67 authored by Ryan Seto's avatar Ryan Seto Committed by Alex Deucher
Browse files

drm/amd/display: Prevent VStartup Overflow 



[WHY & HOW]
Fixed Overflow issue by clamping VStartup to max value of register.

Reviewed-by: default avatarAlvin Lee <alvin.lee2@amd.com>
Signed-off-by: default avatarRyan Seto <ryanseto@amd.com>
Signed-off-by: default avatarAlex Hung <alex.hung@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 082ec596

drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c

+2 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 








#define DML2_MAX_FMT_420_BUFFER_WIDTH 4096









#define TB_BORROWED_MAX 400









#define DML_MAX_VSTARTUP_START 1023

















// ---------------------------









//  Declaration Begins








@@ -6210,6 +6211,7 @@ static dml_uint_t CalculateMaxVStartup(







	dml_print("DML::%s: vblank_avail = %u\n", __func__, vblank_avail);









	dml_print("DML::%s: max_vstartup_lines = %u\n", __func__, max_vstartup_lines);









#endif









	max_vstartup_lines = (dml_uint_t) dml_min(max_vstartup_lines, DML_MAX_VSTARTUP_START);









	return max_vstartup_lines;









}