From 2fd32a65f2e78eff0862c8fdf7815ca6bb44fb2e Mon Sep 17 00:00:00 2001 From: Hersen Wu Date: Fri, 26 Apr 2024 16:39:37 -0400 Subject: [PATCH] drm/amd/display: Skip inactive planes within ModeSupportAndSystemConfiguration commit a54f7e866cc73a4cb71b8b24bb568ba35c8969df upstream. [Why] Coverity reports Memory - illegal accesses. [How] Skip inactive planes. Reviewed-by: Alex Hung Acked-by: Tom Chung Signed-off-by: Hersen Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher [get_pipe_idx() was introduced as a helper by dda4fb85e433 ("drm/amd/display: DML changes for DCN32/321") in v6.0. This patch backports it to make code clearer. And minor conflict is resolved due to code context change.] Signed-off-by: Jianqi Ren Signed-off-by: He Zhe Signed-off-by: Greg Kroah-Hartman --- .../drm/amd/display/dc/dml/display_mode_vba.c | 27 ++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c b/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c index 079fa52a73791..bfb0be4e60a6f 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c +++ b/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c @@ -838,11 +838,30 @@ static unsigned int CursorBppEnumToBits(enum cursor_bpp ebpp) } } +static unsigned int get_pipe_idx(struct display_mode_lib *mode_lib, unsigned int plane_idx) +{ + int pipe_idx = -1; + int i; + + ASSERT(plane_idx < DC__NUM_DPP__MAX); + + for (i = 0; i < DC__NUM_DPP__MAX ; i++) { + if (plane_idx == mode_lib->vba.pipe_plane[i]) { + pipe_idx = i; + break; + } + } + ASSERT(pipe_idx >= 0); + + return pipe_idx; +} + void ModeSupportAndSystemConfiguration(struct display_mode_lib *mode_lib) { soc_bounding_box_st *soc = &mode_lib->vba.soc; unsigned int k; unsigned int total_pipes = 0; + unsigned int pipe_idx = 0; mode_lib->vba.VoltageLevel = mode_lib->vba.cache_pipes[0].clks_cfg.voltage; mode_lib->vba.ReturnBW = mode_lib->vba.ReturnBWPerState[mode_lib->vba.VoltageLevel][mode_lib->vba.maxMpcComb]; @@ -862,8 +881,14 @@ void ModeSupportAndSystemConfiguration(struct display_mode_lib *mode_lib) mode_lib->vba.DISPCLK = soc->clock_limits[mode_lib->vba.VoltageLevel].dispclk_mhz; // Total Available Pipes Support Check - for (k = 0; k < mode_lib->vba.NumberOfActivePlanes; ++k) + for (k = 0; k < mode_lib->vba.NumberOfActivePlanes; ++k) { + pipe_idx = get_pipe_idx(mode_lib, k); + if (pipe_idx == -1) { + ASSERT(0); + continue; // skip inactive planes + } total_pipes += mode_lib->vba.DPPPerPlane[k]; + } ASSERT(total_pipes <= DC__NUM_DPP__MAX); } -- 2.47.3