drm/amd/display: fix array index in DML

[Why&How]
When the a 3d array is used by indexing with only one dimension in an if
condition, the addresses get compared instead of the intended value stored in the
array. GCC 12.1 caught this error:

drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml/dcn32/display_mode_vba_32.c: In function ‘DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation’:
drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml/dcn32/display_mode_vba_32.c:1007:45: error: the comparison will always evaluate as ‘true’ for the address of ‘use_one_row_for_frame_flip’ will never be NULL [-Werror=address]
1007 | if (v->use_one_row_for_frame_flip[k]) {
| ^
In file included from ./drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml/display_mode_lib.h:32,
from ./drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dc.h:45,
from drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml/dcn32/display_mode_vba_32.c:30:
./drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml/display_mode_vba.h:605:14: note: ‘use_one_row_for_frame_flip’ declared here
605 | bool use_one_row_for_frame_flip[DC__VOLTAGE_STATES][2][DC__NUM_DPP__MAX];
|

Fix this by explicitly specifying the last two indices.

Fixes: dda4fb85e433 ("drm/amd/display: DML changes for DCN32/321")
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
index b9f5bfa67791b914e94c8e0f624e69048a19d389..c920d71fbd5608846dbefc64563321b33036aa02 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
@@ -994,7 +994,7 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman
                                                        + mode_lib->vba.DPPPerPlane[k]
                                                                        * (v->PDEAndMetaPTEBytesFrame[k]
                                                                                        + v->MetaRowByte[k]);
-                                       if (v->use_one_row_for_frame_flip[k]) {
+                                       if (v->use_one_row_for_frame_flip[k][0][0]) {
                                                mode_lib->vba.TotImmediateFlipBytes =
                                                                mode_lib->vba.TotImmediateFlipBytes
                                                                                + 2 * v->PixelPTEBytesPerRow[k];