github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/amd/display: Prevent VStartup Overflow

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

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Ryan Seto <ryanseto@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ryan Seto 2025-02-28 15:52:42 -05:00 committed by Alex Deucher
parent 082ec59662
commit 7b59cc671a
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c
View File

@ -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;
}