[PATCH 3/5] drm/amd/pp: Implement load_firmware interface

[Rex Zhu <Rex.Zhu-5C7GfCeVMHo@public.gmane.org>]

with this interface, gfx/sdma can be initialized
before smu.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
---
 drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
index b2ebcb1..6bc8e9c 100644
--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
@@ -270,8 +270,23 @@ static int pp_set_clockgating_state(void *handle,
 	.funcs = &pp_ip_funcs,
 };
 
+/* This interface only be supported On Vi,
+ * because only smu7/8 can help to load gfx/sdma fw,
+ * smu need to be enabled before load other ip's fw.
+ * so call start smu to load smu7 fw and other ip's fw
+ */
 static int pp_dpm_load_fw(void *handle)
 {
+	struct pp_hwmgr *hwmgr = handle;
+
+	if (!hwmgr || !hwmgr->smumgr_funcs || !hwmgr->smumgr_funcs->start_smu)
+		return -EINVAL;
+
+	if (hwmgr->smumgr_funcs->start_smu(hwmgr)) {
+		pr_err("fw load failed\n");
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
-- 
1.9.1

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