drm/amd/display: enable seamless boot for DCN301
[Why]
DCN301 is capable of running seamless boot
if keep_stolen_vga_memory is not set.
[How]
Add a helper to check whether an ASIC can support
seamless boot and set it based on base driver flags.
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Zhan Liu <Zhan.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 3845d7e..6aadb1b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1454,6 +1454,12 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
init_data.flags.power_down_display_on_boot = true;
+ if (check_seamless_boot_capability(adev)) {
+ init_data.flags.power_down_display_on_boot = false;
+ init_data.flags.allow_seamless_boot_optimization = true;
+ DRM_INFO("Seamless boot condition check passed\n");
+ }
+
INIT_LIST_HEAD(&adev->dm.da_list);
/* Display Core create. */
adev->dm.dc = dc_create(&init_data);
@@ -11616,3 +11622,24 @@ int amdgpu_dm_process_dmub_aux_transfer_sync(bool is_cmd_aux, struct dc_context
ctx, DMUB_ASYNC_TO_SYNC_ACCESS_SUCCESS,
(uint32_t *)operation_result);
}
+
+/*
+ * Check whether seamless boot is supported.
+ *
+ * So far we only support seamless boot on CHIP_VANGOGH.
+ * If everything goes well, we may consider expanding
+ * seamless boot to other ASICs.
+ */
+bool check_seamless_boot_capability(struct amdgpu_device *adev)
+{
+ switch (adev->asic_type) {
+ case CHIP_VANGOGH:
+ if (!adev->mman.keep_stolen_vga_memory)
+ return true;
+ break;
+ default:
+ break;
+ }
+
+ return false;
+}
