drm/amdgpu: add an interface to get gfx constants from atombios
Fetch the values from atom rather than hardcoding them in the
driver.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 3b469ea..9df1bcb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -684,6 +684,36 @@
return ret;
}
+union gfx_info {
+ ATOM_GFX_INFO_V2_1 info;
+};
+
+int amdgpu_atombios_get_gfx_info(struct amdgpu_device *adev)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ int index = GetIndexIntoMasterTable(DATA, GFX_Info);
+ uint8_t frev, crev;
+ uint16_t data_offset;
+ int ret = -EINVAL;
+
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL,
+ &frev, &crev, &data_offset)) {
+ union gfx_info *gfx_info = (union gfx_info *)
+ (mode_info->atom_context->bios + data_offset);
+
+ adev->gfx.config.max_shader_engines = gfx_info->info.max_shader_engines;
+ adev->gfx.config.max_tile_pipes = gfx_info->info.max_tile_pipes;
+ adev->gfx.config.max_cu_per_sh = gfx_info->info.max_cu_per_sh;
+ adev->gfx.config.max_sh_per_se = gfx_info->info.max_sh_per_se;
+ adev->gfx.config.max_backends_per_se = gfx_info->info.max_backends_per_se;
+ adev->gfx.config.max_texture_channel_caches =
+ gfx_info->info.max_texture_channel_caches;
+
+ ret = 0;
+ }
+ return ret;
+}
+
union igp_info {
struct _ATOM_INTEGRATED_SYSTEM_INFO info;
struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 info_2;