drm/amd/display: Populate Power Profile In Case of Early Return

Early return possible if context has no clk_mgr.
This will lead to an invalid power profile being returned
which looks identical to a profile with the lowest power level.
Add back logic that populated the power profile and overwrite
the value if needed.

Cc: [email protected]
Fixes: d016d0d ("drm/amd/display: Update Interface to Check UCLK DPM")
Reviewed-by: Dillon Varone <[email protected]>
Signed-off-by: Austin Zheng <[email protected]>
Signed-off-by: Hamza Mahfooz <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Austin Zheng

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -6100,11 +6100,11 @@ struct dc_power_profile dc_get_power_profile_for_dc_state(const struct dc_state
 {
 	struct dc_power_profile profile = { 0 };
 
-	if (!context || !context->clk_mgr || !context->clk_mgr->ctx || !context->clk_mgr->ctx->dc)
+	profile.power_level = !context->bw_ctx.bw.dcn.clk.p_state_change_support;
+	if (!context->clk_mgr || !context->clk_mgr->ctx || !context->clk_mgr->ctx->dc)
 		return profile;
 	struct dc *dc = context->clk_mgr->ctx->dc;
 
-
 	if (dc->res_pool->funcs->get_power_profile)
 		profile.power_level = dc->res_pool->funcs->get_power_profile(context);
 	return profile;