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authorEmily Deng <Emily.Deng@amd.com>2016-08-08 11:32:35 +0800
committerAlex Deucher <alexander.deucher@amd.com>2016-08-08 14:04:36 -0400
commit0bad1619ff5cce53964785a9faedcfb1d4810223 (patch)
tree71db20d72a19388d096475cca218d4f1971b3ef6 /drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
parent0d43f3bca1ea1f85c1b344abcc2f17f4731e5eda (diff)
downloadlinux-stericsson-0bad1619ff5cce53964785a9faedcfb1d4810223.tar.gz
drm/amdgpu: To define whether the GPU has DCE engine.
For virtual display feature, when the GPU has DCE engine, need to disable the VGA render and CRTC, or it will hang when initialize GMC. So first detect whether the GPU has DCE engine. Signed-off-by: Emily Deng <Emily.Deng@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 983175363b06..1b621160b52e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -259,6 +259,33 @@ static const int object_connector_convert[] = {
DRM_MODE_CONNECTOR_Unknown
};
+bool amdgpu_atombios_has_dce_engine_info(struct amdgpu_device *adev)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ struct atom_context *ctx = mode_info->atom_context;
+ int index = GetIndexIntoMasterTable(DATA, Object_Header);
+ u16 size, data_offset;
+ u8 frev, crev;
+ ATOM_DISPLAY_OBJECT_PATH_TABLE *path_obj;
+ ATOM_OBJECT_HEADER *obj_header;
+
+ if (!amdgpu_atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset))
+ return false;
+
+ if (crev < 2)
+ return false;
+
+ obj_header = (ATOM_OBJECT_HEADER *) (ctx->bios + data_offset);
+ path_obj = (ATOM_DISPLAY_OBJECT_PATH_TABLE *)
+ (ctx->bios + data_offset +
+ le16_to_cpu(obj_header->usDisplayPathTableOffset));
+
+ if (path_obj->ucNumOfDispPath)
+ return true;
+ else
+ return false;
+}
+
bool amdgpu_atombios_get_connector_info_from_object_table(struct amdgpu_device *adev)
{
struct amdgpu_mode_info *mode_info = &adev->mode_info;