drm/amd/display: Refactor dml_core_mode_support to reduce stack frame

[WHAT]
When compiling Linux kernel with clang, the following warning / error
messages pops up:

drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml2_0/display_mode_core.c:6853:12:
error: stack frame size (2120) exceeds limit (2056) in
'dml_core_mode_support' [-Werror,-Wframe-larger-than]
 6853 | dml_bool_t dml_core_mode_support(struct display_mode_lib_st
*mode_lib)

[HOW]
Refactoring CalculateVMRowAndSwath_params assignments to a new function
helps reduce the stack frame size in dml_core_mode_support.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4733
Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 29a4dc4b5d82e6b3da343391f9e784cf5c48732c)

1 files changed, 71 insertions, 63 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/display_mode_core.c b/drivers/gpu/drm/amd/display/dc/dml2_0/display_mode_core.c
index c468f492b876..09303c282495 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/display_mode_core.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/display_mode_core.c
@@ -6711,6 +6711,76 @@ static noinline_for_stack void dml_prefetch_check(struct display_mode_lib_st *mo
 	} // for j
 }
 
+static noinline_for_stack void set_vm_row_and_swath_parameters(struct display_mode_lib_st *mode_lib)
+{
+	struct CalculateVMRowAndSwath_params_st *CalculateVMRowAndSwath_params = &mode_lib->scratch.CalculateVMRowAndSwath_params;
+	struct dml_core_mode_support_locals_st *s = &mode_lib->scratch.dml_core_mode_support_locals;
+
+	CalculateVMRowAndSwath_params->NumberOfActiveSurfaces = mode_lib->ms.num_active_planes;
+	CalculateVMRowAndSwath_params->myPipe = s->SurfParameters;
+	CalculateVMRowAndSwath_params->SurfaceSizeInMALL = mode_lib->ms.SurfaceSizeInMALL;
+	CalculateVMRowAndSwath_params->PTEBufferSizeInRequestsLuma = mode_lib->ms.ip.dpte_buffer_size_in_pte_reqs_luma;
+	CalculateVMRowAndSwath_params->PTEBufferSizeInRequestsChroma = mode_lib->ms.ip.dpte_buffer_size_in_pte_reqs_chroma;
+	CalculateVMRowAndSwath_params->DCCMetaBufferSizeBytes = mode_lib->ms.ip.dcc_meta_buffer_size_bytes;
+	CalculateVMRowAndSwath_params->UseMALLForStaticScreen = mode_lib->ms.cache_display_cfg.plane.UseMALLForStaticScreen;
+	CalculateVMRowAndSwath_params->UseMALLForPStateChange = mode_lib->ms.cache_display_cfg.plane.UseMALLForPStateChange;
+	CalculateVMRowAndSwath_params->MALLAllocatedForDCN = mode_lib->ms.soc.mall_allocated_for_dcn_mbytes;
+	CalculateVMRowAndSwath_params->SwathWidthY = mode_lib->ms.SwathWidthYThisState;
+	CalculateVMRowAndSwath_params->SwathWidthC = mode_lib->ms.SwathWidthCThisState;
+	CalculateVMRowAndSwath_params->GPUVMEnable = mode_lib->ms.cache_display_cfg.plane.GPUVMEnable;
+	CalculateVMRowAndSwath_params->HostVMEnable = mode_lib->ms.cache_display_cfg.plane.HostVMEnable;
+	CalculateVMRowAndSwath_params->HostVMMaxNonCachedPageTableLevels = mode_lib->ms.cache_display_cfg.plane.HostVMMaxPageTableLevels;
+	CalculateVMRowAndSwath_params->GPUVMMaxPageTableLevels = mode_lib->ms.cache_display_cfg.plane.GPUVMMaxPageTableLevels;
+	CalculateVMRowAndSwath_params->GPUVMMinPageSizeKBytes = mode_lib->ms.cache_display_cfg.plane.GPUVMMinPageSizeKBytes;
+	CalculateVMRowAndSwath_params->HostVMMinPageSize = mode_lib->ms.soc.hostvm_min_page_size_kbytes * 1024;
+	CalculateVMRowAndSwath_params->PTEBufferModeOverrideEn = mode_lib->ms.cache_display_cfg.plane.PTEBufferModeOverrideEn;
+	CalculateVMRowAndSwath_params->PTEBufferModeOverrideVal = mode_lib->ms.cache_display_cfg.plane.PTEBufferMode;
+	CalculateVMRowAndSwath_params->PTEBufferSizeNotExceeded = mode_lib->ms.PTEBufferSizeNotExceededPerState;
+	CalculateVMRowAndSwath_params->DCCMetaBufferSizeNotExceeded = mode_lib->ms.DCCMetaBufferSizeNotExceededPerState;
+	CalculateVMRowAndSwath_params->dpte_row_width_luma_ub = s->dummy_integer_array[0];
+	CalculateVMRowAndSwath_params->dpte_row_width_chroma_ub = s->dummy_integer_array[1];
+	CalculateVMRowAndSwath_params->dpte_row_height_luma = mode_lib->ms.dpte_row_height;
+	CalculateVMRowAndSwath_params->dpte_row_height_chroma = mode_lib->ms.dpte_row_height_chroma;
+	CalculateVMRowAndSwath_params->dpte_row_height_linear_luma = s->dummy_integer_array[2]; // VBA_DELTA
+	CalculateVMRowAndSwath_params->dpte_row_height_linear_chroma = s->dummy_integer_array[3]; // VBA_DELTA
+	CalculateVMRowAndSwath_params->meta_req_width = s->dummy_integer_array[4];
+	CalculateVMRowAndSwath_params->meta_req_width_chroma = s->dummy_integer_array[5];
+	CalculateVMRowAndSwath_params->meta_req_height = s->dummy_integer_array[6];
+	CalculateVMRowAndSwath_params->meta_req_height_chroma = s->dummy_integer_array[7];
+	CalculateVMRowAndSwath_params->meta_row_width = s->dummy_integer_array[8];
+	CalculateVMRowAndSwath_params->meta_row_width_chroma = s->dummy_integer_array[9];
+	CalculateVMRowAndSwath_params->meta_row_height = mode_lib->ms.meta_row_height;
+	CalculateVMRowAndSwath_params->meta_row_height_chroma = mode_lib->ms.meta_row_height_chroma;
+	CalculateVMRowAndSwath_params->vm_group_bytes = s->dummy_integer_array[10];
+	CalculateVMRowAndSwath_params->dpte_group_bytes = mode_lib->ms.dpte_group_bytes;
+	CalculateVMRowAndSwath_params->PixelPTEReqWidthY = s->dummy_integer_array[11];
+	CalculateVMRowAndSwath_params->PixelPTEReqHeightY = s->dummy_integer_array[12];
+	CalculateVMRowAndSwath_params->PTERequestSizeY = s->dummy_integer_array[13];
+	CalculateVMRowAndSwath_params->PixelPTEReqWidthC = s->dummy_integer_array[14];
+	CalculateVMRowAndSwath_params->PixelPTEReqHeightC = s->dummy_integer_array[15];
+	CalculateVMRowAndSwath_params->PTERequestSizeC = s->dummy_integer_array[16];
+	CalculateVMRowAndSwath_params->dpde0_bytes_per_frame_ub_l = s->dummy_integer_array[17];
+	CalculateVMRowAndSwath_params->meta_pte_bytes_per_frame_ub_l = s->dummy_integer_array[18];
+	CalculateVMRowAndSwath_params->dpde0_bytes_per_frame_ub_c = s->dummy_integer_array[19];
+	CalculateVMRowAndSwath_params->meta_pte_bytes_per_frame_ub_c = s->dummy_integer_array[20];
+	CalculateVMRowAndSwath_params->PrefetchSourceLinesY = mode_lib->ms.PrefetchLinesYThisState;
+	CalculateVMRowAndSwath_params->PrefetchSourceLinesC = mode_lib->ms.PrefetchLinesCThisState;
+	CalculateVMRowAndSwath_params->VInitPreFillY = mode_lib->ms.PrefillY;
+	CalculateVMRowAndSwath_params->VInitPreFillC = mode_lib->ms.PrefillC;
+	CalculateVMRowAndSwath_params->MaxNumSwathY = mode_lib->ms.MaxNumSwY;
+	CalculateVMRowAndSwath_params->MaxNumSwathC = mode_lib->ms.MaxNumSwC;
+	CalculateVMRowAndSwath_params->meta_row_bw = mode_lib->ms.meta_row_bandwidth_this_state;
+	CalculateVMRowAndSwath_params->dpte_row_bw = mode_lib->ms.dpte_row_bandwidth_this_state;
+	CalculateVMRowAndSwath_params->PixelPTEBytesPerRow = mode_lib->ms.DPTEBytesPerRowThisState;
+	CalculateVMRowAndSwath_params->PDEAndMetaPTEBytesFrame = mode_lib->ms.PDEAndMetaPTEBytesPerFrameThisState;
+	CalculateVMRowAndSwath_params->MetaRowByte = mode_lib->ms.MetaRowBytesThisState;
+	CalculateVMRowAndSwath_params->use_one_row_for_frame = mode_lib->ms.use_one_row_for_frame_this_state;
+	CalculateVMRowAndSwath_params->use_one_row_for_frame_flip = mode_lib->ms.use_one_row_for_frame_flip_this_state;
+	CalculateVMRowAndSwath_params->UsesMALLForStaticScreen = s->dummy_boolean_array[0];
+	CalculateVMRowAndSwath_params->PTE_BUFFER_MODE = s->dummy_boolean_array[1];
+	CalculateVMRowAndSwath_params->BIGK_FRAGMENT_SIZE = s->dummy_integer_array[21];
+}
+
 /// @brief The Mode Support function.
 dml_bool_t dml_core_mode_support(struct display_mode_lib_st *mode_lib)
 {
@@ -7683,69 +7753,7 @@ dml_bool_t dml_core_mode_support(struct display_mode_lib_st *mode_lib)
 			s->SurfParameters[k].SwathHeightC = mode_lib->ms.SwathHeightCThisState[k];
 		}
 
-		CalculateVMRowAndSwath_params->NumberOfActiveSurfaces = mode_lib->ms.num_active_planes;
-		CalculateVMRowAndSwath_params->myPipe = s->SurfParameters;
-		CalculateVMRowAndSwath_params->SurfaceSizeInMALL = mode_lib->ms.SurfaceSizeInMALL;
-		CalculateVMRowAndSwath_params->PTEBufferSizeInRequestsLuma = mode_lib->ms.ip.dpte_buffer_size_in_pte_reqs_luma;
-		CalculateVMRowAndSwath_params->PTEBufferSizeInRequestsChroma = mode_lib->ms.ip.dpte_buffer_size_in_pte_reqs_chroma;
-		CalculateVMRowAndSwath_params->DCCMetaBufferSizeBytes = mode_lib->ms.ip.dcc_meta_buffer_size_bytes;
-		CalculateVMRowAndSwath_params->UseMALLForStaticScreen = mode_lib->ms.cache_display_cfg.plane.UseMALLForStaticScreen;
-		CalculateVMRowAndSwath_params->UseMALLForPStateChange = mode_lib->ms.cache_display_cfg.plane.UseMALLForPStateChange;
-		CalculateVMRowAndSwath_params->MALLAllocatedForDCN = mode_lib->ms.soc.mall_allocated_for_dcn_mbytes;
-		CalculateVMRowAndSwath_params->SwathWidthY = mode_lib->ms.SwathWidthYThisState;
-		CalculateVMRowAndSwath_params->SwathWidthC = mode_lib->ms.SwathWidthCThisState;
-		CalculateVMRowAndSwath_params->GPUVMEnable = mode_lib->ms.cache_display_cfg.plane.GPUVMEnable;
-		CalculateVMRowAndSwath_params->HostVMEnable = mode_lib->ms.cache_display_cfg.plane.HostVMEnable;
-		CalculateVMRowAndSwath_params->HostVMMaxNonCachedPageTableLevels = mode_lib->ms.cache_display_cfg.plane.HostVMMaxPageTableLevels;
-		CalculateVMRowAndSwath_params->GPUVMMaxPageTableLevels = mode_lib->ms.cache_display_cfg.plane.GPUVMMaxPageTableLevels;
-		CalculateVMRowAndSwath_params->GPUVMMinPageSizeKBytes = mode_lib->ms.cache_display_cfg.plane.GPUVMMinPageSizeKBytes;
-		CalculateVMRowAndSwath_params->HostVMMinPageSize = mode_lib->ms.soc.hostvm_min_page_size_kbytes * 1024;
-		CalculateVMRowAndSwath_params->PTEBufferModeOverrideEn = mode_lib->ms.cache_display_cfg.plane.PTEBufferModeOverrideEn;
-		CalculateVMRowAndSwath_params->PTEBufferModeOverrideVal = mode_lib->ms.cache_display_cfg.plane.PTEBufferMode;
-		CalculateVMRowAndSwath_params->PTEBufferSizeNotExceeded = mode_lib->ms.PTEBufferSizeNotExceededPerState;
-		CalculateVMRowAndSwath_params->DCCMetaBufferSizeNotExceeded = mode_lib->ms.DCCMetaBufferSizeNotExceededPerState;
-		CalculateVMRowAndSwath_params->dpte_row_width_luma_ub = s->dummy_integer_array[0];
-		CalculateVMRowAndSwath_params->dpte_row_width_chroma_ub = s->dummy_integer_array[1];
-		CalculateVMRowAndSwath_params->dpte_row_height_luma = mode_lib->ms.dpte_row_height;
-		CalculateVMRowAndSwath_params->dpte_row_height_chroma = mode_lib->ms.dpte_row_height_chroma;
-		CalculateVMRowAndSwath_params->dpte_row_height_linear_luma = s->dummy_integer_array[2]; // VBA_DELTA
-		CalculateVMRowAndSwath_params->dpte_row_height_linear_chroma = s->dummy_integer_array[3]; // VBA_DELTA
-		CalculateVMRowAndSwath_params->meta_req_width = s->dummy_integer_array[4];
-		CalculateVMRowAndSwath_params->meta_req_width_chroma = s->dummy_integer_array[5];
-		CalculateVMRowAndSwath_params->meta_req_height = s->dummy_integer_array[6];
-		CalculateVMRowAndSwath_params->meta_req_height_chroma = s->dummy_integer_array[7];
-		CalculateVMRowAndSwath_params->meta_row_width = s->dummy_integer_array[8];
-		CalculateVMRowAndSwath_params->meta_row_width_chroma = s->dummy_integer_array[9];
-		CalculateVMRowAndSwath_params->meta_row_height = mode_lib->ms.meta_row_height;
-		CalculateVMRowAndSwath_params->meta_row_height_chroma = mode_lib->ms.meta_row_height_chroma;
-		CalculateVMRowAndSwath_params->vm_group_bytes = s->dummy_integer_array[10];
-		CalculateVMRowAndSwath_params->dpte_group_bytes = mode_lib->ms.dpte_group_bytes;
-		CalculateVMRowAndSwath_params->PixelPTEReqWidthY = s->dummy_integer_array[11];
-		CalculateVMRowAndSwath_params->PixelPTEReqHeightY = s->dummy_integer_array[12];
-		CalculateVMRowAndSwath_params->PTERequestSizeY = s->dummy_integer_array[13];
-		CalculateVMRowAndSwath_params->PixelPTEReqWidthC = s->dummy_integer_array[14];
-		CalculateVMRowAndSwath_params->PixelPTEReqHeightC = s->dummy_integer_array[15];
-		CalculateVMRowAndSwath_params->PTERequestSizeC = s->dummy_integer_array[16];
-		CalculateVMRowAndSwath_params->dpde0_bytes_per_frame_ub_l = s->dummy_integer_array[17];
-		CalculateVMRowAndSwath_params->meta_pte_bytes_per_frame_ub_l = s->dummy_integer_array[18];
-		CalculateVMRowAndSwath_params->dpde0_bytes_per_frame_ub_c = s->dummy_integer_array[19];
-		CalculateVMRowAndSwath_params->meta_pte_bytes_per_frame_ub_c = s->dummy_integer_array[20];
-		CalculateVMRowAndSwath_params->PrefetchSourceLinesY = mode_lib->ms.PrefetchLinesYThisState;
-		CalculateVMRowAndSwath_params->PrefetchSourceLinesC = mode_lib->ms.PrefetchLinesCThisState;
-		CalculateVMRowAndSwath_params->VInitPreFillY = mode_lib->ms.PrefillY;
-		CalculateVMRowAndSwath_params->VInitPreFillC = mode_lib->ms.PrefillC;
-		CalculateVMRowAndSwath_params->MaxNumSwathY = mode_lib->ms.MaxNumSwY;
-		CalculateVMRowAndSwath_params->MaxNumSwathC = mode_lib->ms.MaxNumSwC;
-		CalculateVMRowAndSwath_params->meta_row_bw = mode_lib->ms.meta_row_bandwidth_this_state;
-		CalculateVMRowAndSwath_params->dpte_row_bw = mode_lib->ms.dpte_row_bandwidth_this_state;
-		CalculateVMRowAndSwath_params->PixelPTEBytesPerRow = mode_lib->ms.DPTEBytesPerRowThisState;
-		CalculateVMRowAndSwath_params->PDEAndMetaPTEBytesFrame = mode_lib->ms.PDEAndMetaPTEBytesPerFrameThisState;
-		CalculateVMRowAndSwath_params->MetaRowByte = mode_lib->ms.MetaRowBytesThisState;
-		CalculateVMRowAndSwath_params->use_one_row_for_frame = mode_lib->ms.use_one_row_for_frame_this_state;
-		CalculateVMRowAndSwath_params->use_one_row_for_frame_flip = mode_lib->ms.use_one_row_for_frame_flip_this_state;
-		CalculateVMRowAndSwath_params->UsesMALLForStaticScreen = s->dummy_boolean_array[0];
-		CalculateVMRowAndSwath_params->PTE_BUFFER_MODE = s->dummy_boolean_array[1];
-		CalculateVMRowAndSwath_params->BIGK_FRAGMENT_SIZE = s->dummy_integer_array[21];
+		set_vm_row_and_swath_parameters(mode_lib);
 
 		CalculateVMRowAndSwath(&mode_lib->scratch,
 			CalculateVMRowAndSwath_params);