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| author |   Ryan Seto <ryanseto@amd.com> | 2025-02-28 15:52:42 -0500 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2025-03-18 14:03:46 -0400 |
| commit | 7b59cc671ae719fe5d608718c472c5735c04f75a (patch) | |
| tree | c3245257d77f3305fac7225bf1e724255c5c9281 | |
| parent | drm/amd/display: Check pipe->stream before passing it to a function (diff) | |
| download | wireguard-linux-7b59cc671ae719fe5d608718c472c5735c04f75a.tar.xz wireguard-linux-7b59cc671ae719fe5d608718c472c5735c04f75a.zip | |
drm/amd/display: Prevent VStartup Overflow
[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>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c index 84a2de9a76d4..7ae9c0ba0c9e 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c @@ -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; } |