drm/amd/display: initialize i2c speed if not initialized in dcnxxx__resource.c

Some dcnxxx__resource.c do not initialize the i2c speed; this patch adds
the required initialization at dc_construct().
Signed-off-by: Brendan Steve Leder <brendanSteve.Leder@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -761,6 +761,10 @@ static bool dc_construct(struct dc *dc,
 	if (!dc->res_pool)
 		goto fail;
 
+	/* set i2c speed if not done by the respective dcnxxx__resource.c */
+	if (dc->caps.i2c_speed_in_khz_hdcp == 0)
+		dc->caps.i2c_speed_in_khz_hdcp = dc->caps.i2c_speed_in_khz;
+
 	dc->clk_mgr = dc_clk_mgr_create(dc->ctx, dc->res_pool->pp_smu, dc->res_pool->dccg);
 	if (!dc->clk_mgr)
 		goto fail;