6.10-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
[ Upstream commit f8718c482572181ca364ffca3c27365cc83cfe9e ]
The scaler_data structure is implicitly copied onto the stack twice by being returned from a function. This is usually a bad idea, but it was not flagged by the compiler until a recent addition that pushed it over the 1024 byte function stack limit:
drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/dml2_translation_helper.c: In function 'populate_dml_plane_cfg_from_plane_state': drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/dml2_translation_helper.c:1075:1: error: the frame size of 1032 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
Use an explicit kzalloc() and memcpy() instead here to keep it off the stack.
Fixes: 00c391102abc ("drm/amd/display: Add misc DC changes for DCN401") Fixes: 7966f319c66d ("drm/amd/display: Introduce DML2") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../display/dc/dml2/dml2_translation_helper.c | 56 ++++++++++--------- 1 file changed, 31 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.c index 8ecc972dbffde..edff6b447680c 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.c @@ -804,7 +804,7 @@ static void populate_dml_surface_cfg_from_plane_state(enum dml_project_id dml2_p } }
-static struct scaler_data get_scaler_data_for_plane(const struct dc_plane_state *in, struct dc_state *context) +static void get_scaler_data_for_plane(const struct dc_plane_state *in, struct dc_state *context, struct scaler_data *out) { int i; struct pipe_ctx *temp_pipe = &context->res_ctx.temp_pipe; @@ -825,7 +825,7 @@ static struct scaler_data get_scaler_data_for_plane(const struct dc_plane_state }
ASSERT(i < MAX_PIPES); - return temp_pipe->plane_res.scl_data; + memcpy(out, &temp_pipe->plane_res.scl_data, sizeof(*out)); }
static void populate_dummy_dml_plane_cfg(struct dml_plane_cfg_st *out, unsigned int location, const struct dc_stream_state *in) @@ -884,27 +884,31 @@ static void populate_dummy_dml_plane_cfg(struct dml_plane_cfg_st *out, unsigned
static void populate_dml_plane_cfg_from_plane_state(struct dml_plane_cfg_st *out, unsigned int location, const struct dc_plane_state *in, struct dc_state *context) { - const struct scaler_data scaler_data = get_scaler_data_for_plane(in, context); + struct scaler_data *scaler_data = kzalloc(sizeof(*scaler_data), GFP_KERNEL); + if (!scaler_data) + return; + + get_scaler_data_for_plane(in, context, scaler_data);
out->CursorBPP[location] = dml_cur_32bit; out->CursorWidth[location] = 256;
out->GPUVMMinPageSizeKBytes[location] = 256;
- out->ViewportWidth[location] = scaler_data.viewport.width; - out->ViewportHeight[location] = scaler_data.viewport.height; - out->ViewportWidthChroma[location] = scaler_data.viewport_c.width; - out->ViewportHeightChroma[location] = scaler_data.viewport_c.height; - out->ViewportXStart[location] = scaler_data.viewport.x; - out->ViewportYStart[location] = scaler_data.viewport.y; - out->ViewportXStartC[location] = scaler_data.viewport_c.x; - out->ViewportYStartC[location] = scaler_data.viewport_c.y; + out->ViewportWidth[location] = scaler_data->viewport.width; + out->ViewportHeight[location] = scaler_data->viewport.height; + out->ViewportWidthChroma[location] = scaler_data->viewport_c.width; + out->ViewportHeightChroma[location] = scaler_data->viewport_c.height; + out->ViewportXStart[location] = scaler_data->viewport.x; + out->ViewportYStart[location] = scaler_data->viewport.y; + out->ViewportXStartC[location] = scaler_data->viewport_c.x; + out->ViewportYStartC[location] = scaler_data->viewport_c.y; out->ViewportStationary[location] = false;
- out->ScalerEnabled[location] = scaler_data.ratios.horz.value != dc_fixpt_one.value || - scaler_data.ratios.horz_c.value != dc_fixpt_one.value || - scaler_data.ratios.vert.value != dc_fixpt_one.value || - scaler_data.ratios.vert_c.value != dc_fixpt_one.value; + out->ScalerEnabled[location] = scaler_data->ratios.horz.value != dc_fixpt_one.value || + scaler_data->ratios.horz_c.value != dc_fixpt_one.value || + scaler_data->ratios.vert.value != dc_fixpt_one.value || + scaler_data->ratios.vert_c.value != dc_fixpt_one.value;
/* Current driver code base uses LBBitPerPixel as 57. There is a discrepancy * from the HW/DML teams about this value. Initialize LBBitPerPixel with the @@ -920,25 +924,25 @@ static void populate_dml_plane_cfg_from_plane_state(struct dml_plane_cfg_st *out out->VRatioChroma[location] = 1; } else { /* Follow the original dml_wrapper.c code direction to fix scaling issues */ - out->HRatio[location] = (dml_float_t)scaler_data.ratios.horz.value / (1ULL << 32); - out->HRatioChroma[location] = (dml_float_t)scaler_data.ratios.horz_c.value / (1ULL << 32); - out->VRatio[location] = (dml_float_t)scaler_data.ratios.vert.value / (1ULL << 32); - out->VRatioChroma[location] = (dml_float_t)scaler_data.ratios.vert_c.value / (1ULL << 32); + out->HRatio[location] = (dml_float_t)scaler_data->ratios.horz.value / (1ULL << 32); + out->HRatioChroma[location] = (dml_float_t)scaler_data->ratios.horz_c.value / (1ULL << 32); + out->VRatio[location] = (dml_float_t)scaler_data->ratios.vert.value / (1ULL << 32); + out->VRatioChroma[location] = (dml_float_t)scaler_data->ratios.vert_c.value / (1ULL << 32); }
- if (!scaler_data.taps.h_taps) { + if (!scaler_data->taps.h_taps) { out->HTaps[location] = 1; out->HTapsChroma[location] = 1; } else { - out->HTaps[location] = scaler_data.taps.h_taps; - out->HTapsChroma[location] = scaler_data.taps.h_taps_c; + out->HTaps[location] = scaler_data->taps.h_taps; + out->HTapsChroma[location] = scaler_data->taps.h_taps_c; } - if (!scaler_data.taps.v_taps) { + if (!scaler_data->taps.v_taps) { out->VTaps[location] = 1; out->VTapsChroma[location] = 1; } else { - out->VTaps[location] = scaler_data.taps.v_taps; - out->VTapsChroma[location] = scaler_data.taps.v_taps_c; + out->VTaps[location] = scaler_data->taps.v_taps; + out->VTapsChroma[location] = scaler_data->taps.v_taps_c; }
out->SourceScan[location] = (enum dml_rotation_angle)in->rotation; @@ -949,6 +953,8 @@ static void populate_dml_plane_cfg_from_plane_state(struct dml_plane_cfg_st *out out->DynamicMetadataTransmittedBytes[location] = 0;
out->NumberOfCursors[location] = 1; + + kfree(scaler_data); }
static unsigned int map_stream_to_dml_display_cfg(const struct dml2_context *dml2,